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srsRAN_4G
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Changed nof_prb, nof_ports, cell_id, etc. by lte_cell_t structure. Fixed PBCH/PDSCH resource mapping with odd number PRB. PDSCH examles not working with more than 6 PRB due to downsampling problem.

Browse Source
master
ismagom 11 years ago
parent c5d07eee00
commit 5eab57670b
45 changed files with 2327 additions and 1802 deletions
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2
CMakeLists.txt
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@ -77,7 +77,7 @@ IF(CMAKE_COMPILER_IS_GNUCXX)
ENDIF(CMAKE_COMPILER_IS_GNUCXX)
IF(CMAKE_COMPILER_IS_GNUCC)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wno-format-extra-args -Winline -Wno-unused-result -Wno-format -std=c99 -D_GNU_SOURCE")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror -Wall -Wno-format-extra-args -Winline -Wno-unused-result -Wno-format -std=c99 -D_GNU_SOURCE")
IF(NOT WIN32)
ADD_CXX_COMPILER_FLAG_IF_AVAILABLE(-fvisibility=hidden HAVE_VISIBILITY_HIDDEN)
ENDIF(NOT WIN32)

8
lte/phy/examples/pbch_enodeb.c
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@ -211,8 +211,14 @@ int main(int argc, char **argv) {
sss_generate(sss_signal0, sss_signal5, cell_id);
/* Generate CRS signals */
lte_cell_t cell;
cell.id = cell_id;
cell.nof_prb = 6;
cell.cp = CPNORM;
cell.nof_ports = 1;
for (i=0;i<NSLOTS_X_FRAME;i++) {
if (refsignal_init_LTEDL(&refs[i], 0, i, cell_id, CPNORM, nof_prb)) {
if (refsignal_init_LTEDL(&refs[i], 0, i, cell)) {
fprintf(stderr, "Error initiating CRS slot=%d\n", i);
return -1;
}

9
lte/phy/examples/pbch_ue.c
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@ -262,7 +262,14 @@ void base_free() {
int mib_decoder_init(int cell_id) {
if (chest_ref_LTEDL(&chest, cell_id)) {
lte_cell_t cell;
cell.id = cell_id;
cell.nof_ports = MAX_PORTS;
cell.nof_prb = 6;
cell.cp = CPNORM;
if (chest_ref_LTEDL(&chest, cell)) {
fprintf(stderr, "Error initializing reference signal\n");
return -1;
}

35
lte/phy/examples/pdsch_enodeb.c
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@ -43,7 +43,7 @@ int nof_frames = -1;
int cell_id = 1;
int nof_prb = 6;
char *uhd_args = "";
int cfi=1;
uint8_t cfi=1;
float uhd_amp = 0.25, uhd_gain = 10.0, uhd_freq = 2400000000;
@ -120,6 +120,13 @@ void parse_args(int argc, char **argv) {
}
void base_init() {
lte_cell_t cell;
cell.id = cell_id;
cell.nof_ports = 1;
cell.nof_prb = nof_prb;
cell.cp = CPNORM;
/* init memory */
sf_buffer = malloc(sizeof(cf_t) * sf_n_re);
if (!sf_buffer) {
@ -160,12 +167,12 @@ void base_init() {
exit(-1);
}
if (regs_init(&regs, cell_id, nof_prb, 1, R_1, PHICH_NORM, CPNORM)) {
if (regs_init(&regs, R_1, PHICH_NORM, cell)) {
fprintf(stderr, "Error initiating regs\n");
exit(-1);
}
if (pcfich_init(&pcfich, &regs, cell_id, nof_prb, 1, CPNORM)) {
if (pcfich_init(&pcfich, &regs, cell)) {
fprintf(stderr, "Error creating PBCH object\n");
exit(-1);
}
@ -175,12 +182,12 @@ void base_init() {
exit(-1);
}
if (pdcch_init(&pdcch, &regs, nof_prb, 1, cell_id, CPNORM)) {
if (pdcch_init(&pdcch, &regs, cell)) {
fprintf(stderr, "Error creating PDCCH object\n");
exit(-1);
}
if (pdsch_init(&pdsch, 1234, nof_prb, 1, cell_id, CPNORM)) {
if (pdsch_init(&pdsch, 1234, cell)) {
fprintf(stderr, "Error creating PDSCH object\n");
exit(-1);
}
@ -245,9 +252,16 @@ int main(int argc, char **argv) {
pss_generate(pss_signal, N_id_2);
sss_generate(sss_signal0, sss_signal5, cell_id);
lte_cell_t cell;
cell.id = cell_id;
cell.nof_ports = 1;
cell.nof_prb = nof_prb;
cell.cp = CPNORM;
/* Generate CRS signals */
for (i = 0; i < NSLOTS_X_FRAME; i++) {
if (refsignal_init_LTEDL(&refs[i], 0, i, cell_id, CPNORM, nof_prb)) {
if (refsignal_init_LTEDL(&refs[i], 0, i, cell)) {
fprintf(stderr, "Error initiating CRS slot=%d\n", i);
return -1;
}
@ -286,12 +300,7 @@ int main(int argc, char **argv) {
dci_msg_pack_pdsch(&ra_dl, &dci_tx.msg[0], Format1, nof_prb, false);
dci_tx.nof_dcis++;
if (pdcch_set_cfi(&pdcch, cfi)) {
fprintf(stderr, "Error setting CFI\n");
return -1;
}
pdcch_init_search_ue(&pdcch, 1234);
pdcch_init_search_ue(&pdcch, 1234, cfi);
ra_prb_get_dl(&prb_alloc, &ra_dl, nof_prb);
ra_prb_get_re(&prb_alloc, nof_prb, 1, nof_prb<10?(cfi+1):cfi, CPNORM);
@ -335,7 +344,7 @@ int main(int argc, char **argv) {
pdcch.search_mode[2].candidates[0][sf_idx].ncce, 1234);
INFO("Setting DCI candidate L: %d nCCE: %d\n", pdcch.search_mode[2].candidates[0][sf_idx].L,
pdcch.search_mode[2].candidates[0][sf_idx].ncce);
pdcch_encode(&pdcch, &dci_tx, sf_symbols, sf_idx);
pdcch_encode(&pdcch, &dci_tx, sf_symbols, sf_idx, cfi);
pdsch_encode(&pdsch, data, sf_symbols, sf_idx, ra_dl.mcs, &prb_alloc);
/* Transform to OFDM symbols */

98
lte/phy/examples/pdsch_ue.c
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@ -68,7 +68,10 @@ int sampling_nof_prb = 6;
/* Number of samples in a subframe */
int sf_n_samples;
lte_cell_t cell;
int cell_id_initated = 0, mib_initiated = 0;
int subframe_number;
int go_exit = 0;
@ -79,7 +82,6 @@ filesource_t fsrc;
cf_t *input_buffer, *sf_buffer, *fft_buffer, *input_decim_buffer, *ce[MAX_PORTS];
float *tmp_plot;
pbch_t pbch;
pbch_mib_t mib;
pcfich_t pcfich;
pdcch_t pdcch;
dci_t dci_set;
@ -257,14 +259,12 @@ int base_init(int nof_prb) {
}
}
bzero(&mib, sizeof(pbch_mib_t));
if (sync_frame_init(&sframe, DOWNSAMPLE_FACTOR(nof_prb,6))) {
fprintf(stderr, "Error initiating PSS/SSS\n");
return -1;
}
if (chest_init(&chest, LINEAR, CPNORM, nof_prb, NOF_PORTS)) {
if (chest_init(&chest, LINEAR, nof_prb * RE_X_RB, CPNORM_NSYMB, NOF_PORTS)) {
fprintf(stderr, "Error initializing equalizer\n");
return -1;
}
@ -315,46 +315,57 @@ void base_free() {
}
}
int mib_init(int cell_id) {
int mib_init(phich_resources_t phich_resources, phich_length_t phich_length) {
if (mib.nof_prb > sampling_nof_prb) {
if (!lte_cell_isvalid(&cell)) {
fprintf(stderr, "Invalid cell properties: Id=%d, Ports=%d, PRBs=%d\n",
cell.id, cell.nof_ports, cell.nof_prb);
return -1;
}
if (cell.nof_prb > sampling_nof_prb) {
fprintf(stderr, "Error sampling frequency is %.2f Mhz but captured signal has %d PRB\n",
(float) lte_sampling_freq_hz(sampling_nof_prb)/MHZ, mib.nof_prb);
(float) lte_sampling_freq_hz(sampling_nof_prb)/MHZ, cell.nof_prb);
return -1;
}
if (regs_init(&regs, cell_id, mib.nof_prb, mib.nof_ports,
mib.phich_resources, mib.phich_length, CPNORM)) {
fprintf(stderr, "Error initiating regs\n");
if (regs_init(&regs, phich_resources, phich_length, cell)) {
fprintf(stderr, "Error initiating REGs\n");
return -1;
}
if (pcfich_init(&pcfich, &regs, cell_id, mib.nof_prb, mib.nof_ports, CPNORM)) {
if (pcfich_init(&pcfich, &regs, cell)) {
fprintf(stderr, "Error creating PCFICH object\n");
return -1;
}
if (pdcch_init(&pdcch, &regs, mib.nof_prb, mib.nof_ports, cell_id, CPNORM)) {
if (pdcch_init(&pdcch, &regs, cell)) {
fprintf(stderr, "Error creating PDCCH object\n");
return -1;
}
if (pdsch_init(&pdsch, 1234, mib.nof_prb, mib.nof_ports, cell_id, CPNORM)) {
if (pdsch_init(&pdsch, 1234, cell)) {
fprintf(stderr, "Error creating PDSCH object\n");
return -1;
}
chest_set_nof_ports(&chest, mib.nof_ports);
chest_set_nof_ports(&chest, cell.nof_ports);
mib_initiated = 1;
DEBUG("Receiver initiated cell_id=%d nof_prb=%d\n", cell_id, mib.nof_prb);
DEBUG("Receiver initiated cell.id=%d nof_prb=%d\n", cell.id, cell.nof_prb);
return 0;
}
int cell_id_init(int nof_prb, int cell_id) {
if (chest_ref_LTEDL(&chest, cell_id)) {
lte_cell_t cell;
cell.id = cell_id;
cell.nof_prb = 6;
cell.nof_ports = MAX_PORTS;
cell.cp = CPNORM;
if (chest_ref_LTEDL(&chest, cell)) {
fprintf(stderr, "Error initializing reference signal\n");
return -1;
}
@ -373,14 +384,15 @@ int cell_id_init(int nof_prb, int cell_id) {
char data[10000];
int rx_run(cf_t *input, int sf_idx) {
int cfi, i, cfi_distance, nof_dcis;
uint8_t cfi, cfi_distance;
int i, nof_dcis;
cf_t *input_decim;
ra_pdsch_t ra_dl;
ra_prb_t prb_alloc;
/* Downsample if the signal bandwith is shorter */
if (sampling_nof_prb > mib.nof_prb) {
decim_c(input, input_decim_buffer, sf_n_samples, DOWNSAMPLE_FACTOR(sampling_nof_prb, mib.nof_prb));
if (sampling_nof_prb > cell.nof_prb) {
decim_c(input, input_decim_buffer, sf_n_samples, DOWNSAMPLE_FACTOR(sampling_nof_prb, cell.nof_prb));
input_decim = input_decim_buffer;
} else {
input_decim = input;
@ -402,18 +414,15 @@ int rx_run(cf_t *input, int sf_idx) {
fprintf(stderr, "Error setting CFI\n");
return -1;
}
if (pdcch_set_cfi(&pdcch, cfi)) {
fprintf(stderr, "Error setting CFI\n");
return -1;
}
pdcch_init_search_ue(&pdcch, 1234);
pdcch_init_search_ue(&pdcch, 1234, cfi);
dci_set.nof_dcis = 0;
nof_dcis = pdcch_decode(&pdcch, fft_buffer, ce, &dci_set, sf_idx);
nof_dcis = pdcch_decode(&pdcch, fft_buffer, ce, &dci_set, sf_idx, cfi);
INFO("Received %d DCIs\n", nof_dcis);
for (i=0;i<nof_dcis;i++) {
dci_msg_type_t type;
if (dci_msg_get_type(&dci_set.msg[i], &type, mib.nof_prb, 1234)) {
if (dci_msg_get_type(&dci_set.msg[i], &type, cell.nof_prb, 1234)) {
fprintf(stderr, "Can't get DCI message type\n");
} else {
INFO("MSG %d: L: %d nCCE: %d Nbits: %d. ",i,dci_set.msg[i].location.L,
@ -424,22 +433,22 @@ int rx_run(cf_t *input, int sf_idx) {
switch(type.type) {
case PDSCH_SCHED:
bzero(&ra_dl, sizeof(ra_pdsch_t));
if (dci_msg_unpack_pdsch(&dci_set.msg[i], &ra_dl, mib.nof_prb,
if (dci_msg_unpack_pdsch(&dci_set.msg[i], &ra_dl, cell.nof_prb,
false)) {
fprintf(stderr, "Can't unpack PDSCH message\n");
break;
}
if (VERBOSE_ISINFO() || !pdsch_total) {
printf("\n");
ra_pdsch_fprint(stdout, &ra_dl, mib.nof_prb);
ra_pdsch_fprint(stdout, &ra_dl, cell.nof_prb);
printf("\n");
}
if (ra_prb_get_dl(&prb_alloc, &ra_dl, mib.nof_prb)) {
if (ra_prb_get_dl(&prb_alloc, &ra_dl, cell.nof_prb)) {
fprintf(stderr, "Error computing resource allocation\n");
break;
}
ra_prb_get_re(&prb_alloc, mib.nof_prb, mib.nof_ports,
mib.nof_prb<10?(cfi+1):cfi, CPNORM);
ra_prb_get_re(&prb_alloc, cell.nof_prb, cell.nof_ports,
cell.nof_prb<10?(cfi+1):cfi, CPNORM);
if (pdsch_decode(&pdsch, fft_buffer, ce, data, sf_idx, ra_dl.mcs, &prb_alloc)) {
pdsch_errors++;
@ -455,7 +464,7 @@ int rx_run(cf_t *input, int sf_idx) {
#ifndef DISABLE_GRAPHICS
if (!disable_plots && nof_dcis > 0) {
int n_re = 2 * RE_X_RB * CPNORM_NSYMB * mib.nof_prb;
int n_re = 2 * RE_X_RB * CPNORM_NSYMB * cell.nof_prb;
for (i = 0; i < n_re; i++) {
tmp_plot[i] = 10 * log10f(cabsf(fft_buffer[i]));
if (isinf(tmp_plot[i])) {
@ -472,7 +481,7 @@ int rx_run(cf_t *input, int sf_idx) {
return 0;
}
int mib_decoder_run(cf_t *input) {
int mib_decoder_run(cf_t *input, pbch_mib_t *mib) {
int i, n;
lte_fft_run_slot(&fft, input, fft_buffer);
@ -483,23 +492,30 @@ int mib_decoder_run(cf_t *input) {
}
DEBUG("Decoding PBCH\n", 0);
n = pbch_decode(&pbch, fft_buffer, ce, &mib);
n = pbch_decode(&pbch, fft_buffer, ce, mib);
return n;
}
int run_receiver(cf_t *input, int cell_id, int sf_idx) {
pbch_mib_t mib;
if (!cell_id_initated) {
cell_id_init(sampling_nof_prb, cell_id);
}
if (!mib.nof_prb) {
if (!cell.nof_prb) {
if (!sf_idx) {
if (mib_decoder_run(&input[sf_n_samples/2])) {
if (mib_decoder_run(&input[sf_n_samples/2], &mib)) {
INFO("MIB decoded!\n", 0);
cell.id = cell_id;
cell.cp = CPNORM;
cell.nof_ports = mib.nof_ports;
cell.nof_prb = mib.nof_prb;
subframe_number = mib.sfn;
if (!mib_initiated) {
if (mib_init(cell_id)) {
if (mib_init(mib.phich_resources, mib.phich_length)) {
return -1;
}
}
@ -511,7 +527,7 @@ int run_receiver(cf_t *input, int cell_id, int sf_idx) {
}
}
}
if (mib.nof_prb) {
if (cell.nof_prb) {
if (rx_run(input, sf_idx)) {
return -1;
}
@ -590,8 +606,8 @@ int main(int argc, char **argv) {
signal(SIGINT, sigintHandler);
/* Initialize variables */
mib.sfn = -1;
frame_cnt = 0;
subframe_number = -1;
/* The number of samples read from the USRP or file corresponds to 1 ms (subframe) */
sf_n_samples = 1920 * lte_symbol_sz(sampling_nof_prb)/128;
@ -608,7 +624,7 @@ int main(int argc, char **argv) {
break;
case 1:
if (!(frame_cnt%10)) {
mib.sfn++;
subframe_number++;
}
/* synch'd and tracking */
if (run_receiver(sf_buffer, sync_frame_cell_id(&sframe), sync_frame_sfidx(&sframe))) {
@ -617,7 +633,7 @@ int main(int argc, char **argv) {
if (!(frame_cnt % 10)) {
printf(
"SFN: %4d, CFO: %+.4f KHz, SFO: %+.4f Khz, TimeOffset: %4d, Errors: %4d/%4d, BLER: %.1e\r",
mib.sfn, sframe.cur_cfo * 15, sframe.timeoffset / 5, sframe.peak_idx,
subframe_number, sframe.cur_cfo * 15, sframe.timeoffset / 5, sframe.peak_idx,
pdsch_errors, pdsch_total,
(float) pdsch_errors / pdsch_total);
fflush(stdout);

8
lte/phy/examples/scan_mib.c
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@ -311,7 +311,13 @@ int rssi_scan() {
int mib_decoder_init(int cell_id) {
if (chest_ref_LTEDL(&chest, cell_id)) {
lte_cell_t cell;
cell.id = cell_id;
cell.nof_prb = 6;
cell.nof_ports = MAX_PORTS;
cell.cp = CPNORM;
if (chest_ref_LTEDL(&chest, cell)) {
fprintf(stderr, "Error initializing reference signal\n");
return -1;
}

122
lte/phy/include/liblte/phy/ch_estimation/chest.h
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@ -40,7 +40,12 @@
typedef _Complex float cf_t; /* this is only a shortcut */
typedef enum {LINEAR} chest_interp_t;
typedef void (*interpolate_fnc_t) (cf_t *input, cf_t *output, int M, int len, int off_st, int off_end);
typedef void (*interpolate_fnc_t) (cf_t *input,
cf_t *output,
int M,
int len,
int off_st,
int off_end);
/** This is an OFDM channel estimator.
* It works with any reference signal pattern, provided by the object
@ -50,34 +55,94 @@ typedef void (*interpolate_fnc_t) (cf_t *input, cf_t *output, int M, int len, in
*/
/* Low-level API */
typedef struct LIBLTE_API{
int nof_ports;
int nof_symbols;
int nof_prb;
lte_cp_t cp;
typedef struct LIBLTE_API {
uint8_t nof_ports;
uint16_t nof_re;
uint8_t nof_symbols;
refsignal_t refsignal[MAX_PORTS][NSLOTS_X_FRAME];
interpolate_fnc_t interp;
}chest_t;
LIBLTE_API int chest_init(chest_t *q, chest_interp_t interp, lte_cp_t cp, int nof_prb, int nof_ports);
LIBLTE_API void chest_free(chest_t *q);
LIBLTE_API void chest_set_nof_ports(chest_t *q, int nof_ports);
LIBLTE_API int chest_ref_LTEDL_slot_port(chest_t *q, int port, int nslot, int cell_id);
LIBLTE_API int chest_ref_LTEDL_slot(chest_t *q, int nslot, int cell_id);
LIBLTE_API int chest_ref_LTEDL(chest_t *q, int cell_id);
LIBLTE_API int chest_init(chest_t *q,
chest_interp_t interp,
uint16_t nof_re,
uint8_t nof_symbols,
uint8_t nof_ports);
LIBLTE_API void chest_ce_ref(chest_t *q, cf_t *input, int nslot, int port_id, int nref);
LIBLTE_API void chest_ce_slot_port(chest_t *q, cf_t *input, cf_t *ce, int nslot, int port_id);
LIBLTE_API void chest_ce_sf_port(chest_t *q, cf_t *input, cf_t *ce, int sf_idx, int port_id);
LIBLTE_API void chest_ce_slot(chest_t *q, cf_t *input, cf_t *ce[MAX_PORTS], int nslot);
LIBLTE_API void chest_ce_sf(chest_t *q, cf_t *input, cf_t *ce[MAX_PORTS], int sf_idx);
LIBLTE_API void chest_free(chest_t *q);
LIBLTE_API void chest_fprint(chest_t *q, FILE *stream, int nslot, int port_id);
LIBLTE_API void chest_ref_fprint(chest_t *q, FILE *stream, int nslot, int port_id);
LIBLTE_API void chest_recvsig_fprint(chest_t *q, FILE *stream, int nslot, int port_id);
LIBLTE_API void chest_ce_fprint(chest_t *q, FILE *stream, int nslot, int port_id);
LIBLTE_API int chest_ref_symbols(chest_t *q, int port_id, int nslot, int l[2]);
LIBLTE_API int chest_set_nof_ports(chest_t *q,
uint8_t nof_ports);
LIBLTE_API int chest_init_LTEDL(chest_t *q,
chest_interp_t interp,
lte_cell_t cell);
LIBLTE_API int chest_ref_LTEDL_slot_port(chest_t *q,
uint8_t nslot,
uint8_t port_id,
lte_cell_t cell);
LIBLTE_API int chest_ref_LTEDL_slot(chest_t *q,
uint8_t nslot,
lte_cell_t cell);
LIBLTE_API int chest_ref_LTEDL(chest_t *q,
lte_cell_t cell);
LIBLTE_API int chest_ce_ref(chest_t *q,
cf_t *input,
uint8_t nslot,
uint8_t port_id,
uint16_t nref);
LIBLTE_API int chest_ce_slot_port(chest_t *q,
cf_t *input,
cf_t *ce,
uint8_t nslot,
uint8_t port_id);
LIBLTE_API int chest_ce_sf_port(chest_t *q,
cf_t *input,
cf_t *ce,
uint8_t sf_idx,
uint8_t port_id);
LIBLTE_API int chest_ce_slot(chest_t *q,
cf_t *input,
cf_t *ce[MAX_PORTS],
uint8_t nslot);
LIBLTE_API int chest_ce_sf(chest_t *q,
cf_t *input,
cf_t *ce[MAX_PORTS],
uint8_t sf_idx);
LIBLTE_API void chest_fprint(chest_t *q,
FILE *stream,
uint8_t nslot,
uint8_t port_id);
LIBLTE_API void chest_ref_fprint(chest_t *q,
FILE *stream,
uint8_t nslot,
uint8_t port_id);
LIBLTE_API void chest_recvsig_fprint(chest_t *q,
FILE *stream,
uint8_t nslot,
uint8_t port_id);
LIBLTE_API void chest_ce_fprint(chest_t *q,
FILE *stream,
uint8_t nslot,
uint8_t port_id);
LIBLTE_API int chest_ref_symbols(chest_t *q,
uint8_t port_id,
uint8_t nslot,
uint8_t l[2]);
/* High-level API */
@ -94,8 +159,7 @@ typedef struct LIBLTE_API{
cf_t *input;
int in_len;
struct chest_ctrl_in {
int slot_id; // slot id in the 10ms frame
int cell_id;
int sf_idx; // subframe id in the 10ms frame
} ctrl_in;
cf_t *output[MAX_PORTS];
int out_len[MAX_PORTS];
@ -108,3 +172,11 @@ LIBLTE_API int chest_work(chest_hl* hl);
LIBLTE_API int chest_stop(chest_hl* hl);
#endif

24
lte/phy/include/liblte/phy/ch_estimation/refsignal.h
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@ -43,26 +43,30 @@
typedef _Complex float cf_t;
typedef struct LIBLTE_API{
int time_idx;
int freq_idx;
uint8_t time_idx;
uint16_t freq_idx;
cf_t simbol;
cf_t recv_simbol;
}ref_t;
typedef struct LIBLTE_API{
int nof_refs; // number of reference signals
int *symbols_ref; // symbols with at least one reference
int nsymbols; // number of symbols with at least one reference
int voffset; // offset of the first reference in the freq domain
int nof_prb;
uint16_t nof_refs; // number of reference signals
uint8_t *symbols_ref; // symbols with at least one reference
uint8_t nsymbols; // number of symbols with at least one reference
uint8_t voffset; // offset of the first reference in the freq domain
uint16_t nof_prb;
ref_t *refs;
cf_t *ch_est;
} refsignal_t;
LIBLTE_API int refsignal_init_LTEDL(refsignal_t *q, int port_id, int nslot,
int cell_id, lte_cp_t cp, int nof_prb);
LIBLTE_API int refsignal_init_LTEDL(refsignal_t *q,
uint8_t port_id,
uint8_t nslot,
lte_cell_t cell);
LIBLTE_API void refsignal_free(refsignal_t *q);
LIBLTE_API void refsignal_put(refsignal_t *q, cf_t *slot_symbols);
LIBLTE_API int refsignal_put(refsignal_t *q,
cf_t *slot_symbols);
#endif

12
lte/phy/include/liblte/phy/channel/ch_awgn.h
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@ -34,8 +34,16 @@
typedef _Complex float cf_t;
LIBLTE_API void ch_awgn_c(const cf_t* input, cf_t* output, float variance, int buff_sz);
LIBLTE_API void ch_awgn_f(const float* x, float* y, float variance, int buff_sz);
LIBLTE_API void ch_awgn_c(const cf_t* input,
cf_t* output,
float variance,
int buff_sz);
LIBLTE_API void ch_awgn_f(const float* x,
float* y,
float variance,
int buff_sz);
/* High-level API */

30
lte/phy/include/liblte/phy/common/fft.h
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@ -51,14 +51,32 @@ typedef struct LIBLTE_API{
cf_t *tmp; // for removing zero padding
}lte_fft_t;
LIBLTE_API int lte_fft_init(lte_fft_t *q, lte_cp_t cp_type, int nof_prb);
LIBLTE_API int lte_fft_init(lte_fft_t *q,
lte_cp_t cp_type,
int nof_prb);
LIBLTE_API void lte_fft_free(lte_fft_t *q);
LIBLTE_API void lte_fft_run_slot(lte_fft_t *q, cf_t *input, cf_t *output);
LIBLTE_API void lte_fft_run_sf(lte_fft_t *q, cf_t *input, cf_t *output);
LIBLTE_API int lte_ifft_init(lte_fft_t *q, lte_cp_t cp_type, int nof_prb);
LIBLTE_API void lte_fft_run_slot(lte_fft_t *q,
cf_t *input,
cf_t *output);
LIBLTE_API void lte_fft_run_sf(lte_fft_t *q,
cf_t *input,
cf_t *output);
LIBLTE_API int lte_ifft_init(lte_fft_t *q,
lte_cp_t cp_type,
int nof_prb);
LIBLTE_API void lte_ifft_free(lte_fft_t *q);
LIBLTE_API void lte_ifft_run_slot(lte_fft_t *q, cf_t *input, cf_t *output);
LIBLTE_API void lte_ifft_run_sf(lte_fft_t *q, cf_t *input, cf_t *output);
LIBLTE_API void lte_ifft_run_slot(lte_fft_t *q,
cf_t *input,
cf_t *output);
LIBLTE_API void lte_ifft_run_sf(lte_fft_t *q,
cf_t *input,
cf_t *output);
#endif

52
lte/phy/include/liblte/phy/common/phy_common.h
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@ -29,6 +29,8 @@
#ifndef _LTEBASE_
#define _LTEBASE_
#include <stdint.h>
#include <stdbool.h>
#include "liblte/config.h"
#define NSUBFRAMES_X_FRAME 10
@ -100,23 +102,17 @@ typedef enum {CPNORM, CPEXT} lte_cp_t;
|| l == CP_NSYMB(cp) - 3)
LIBLTE_API const int lte_symbol_sz(int nof_prb);
LIBLTE_API const int lte_sampling_freq_hz(int nof_prb);
LIBLTE_API int lte_re_x_prb(int ns, int symbol, int nof_ports, int nof_symbols);
LIBLTE_API int lte_voffset(int symbol_id, int cell_id, int nof_ports);
#define NOF_LTE_BANDS 29
#define NOF_TC_CB_SIZES 188
typedef struct LIBLTE_API {
int nof_prb;
int nof_ports;
int cell_id;
uint8_t nof_prb;
uint8_t nof_ports;
uint16_t id;
lte_cp_t cp;
}lte_cell_t;
typedef enum LIBLTE_API {
SINGLE_ANTENNA,TX_DIVERSITY, SPATIAL_MULTIPLEX
} lte_mimo_type_t;
@ -134,16 +130,46 @@ LIBLTE_API enum band_geographical_area {
ALL, NAR, APAC, EMEA, JAPAN, CALA, NA
};
LIBLTE_API bool lte_cell_isvalid(lte_cell_t *cell);
LIBLTE_API const int lte_symbol_sz(int nof_prb);
LIBLTE_API const int lte_sampling_freq_hz(int nof_prb);
LIBLTE_API int lte_re_x_prb(int ns,
int symbol,
int nof_ports,
int nof_symbols);
LIBLTE_API int lte_voffset(int symbol_id,
int cell_id,
int nof_ports);
LIBLTE_API int lte_cb_size(int index);
LIBLTE_API int lte_find_cb_index(int long_cb);
LIBLTE_API float lte_band_fd(int earfcn);
LIBLTE_API int lte_band_get_fd_band(int band, lte_earfcn_t *earfcn, int earfcn_start, int earfcn_end, int max_elems);
LIBLTE_API int lte_band_get_fd_band_all(int band, lte_earfcn_t *earfcn, int max_nelems);
LIBLTE_API int lte_band_get_fd_region(enum band_geographical_area region, lte_earfcn_t *earfcn, int max_elems);
LIBLTE_API int lte_str2mimotype(char *mimo_type_str, lte_mimo_type_t *type);
LIBLTE_API int lte_band_get_fd_band(int band,
lte_earfcn_t *earfcn,
int earfcn_start,
int earfcn_end,
int max_elems);
LIBLTE_API int lte_band_get_fd_band_all(int band,
lte_earfcn_t *earfcn,
int max_nelems);
LIBLTE_API int lte_band_get_fd_region(enum band_geographical_area region,
lte_earfcn_t *earfcn,
int max_elems);
LIBLTE_API int lte_str2mimotype(char *mimo_type_str,
lte_mimo_type_t *type);
LIBLTE_API char *lte_mimotype2str(lte_mimo_type_t type);
#endif

38
lte/phy/include/liblte/phy/common/sequence.h
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@ -33,19 +33,39 @@
typedef struct LIBLTE_API {
char *c;
int len;
uint32_t len;
} sequence_t;
LIBLTE_API int sequence_init(sequence_t *q, int len);
LIBLTE_API int sequence_init(sequence_t *q, uint32_t len);
LIBLTE_API void sequence_free(sequence_t *q);
LIBLTE_API int sequence_LTEPRS(sequence_t *q, int len, int seed);
LIBLTE_API int sequence_LTEPRS(sequence_t *q,
uint32_t len,
uint32_t seed);
LIBLTE_API int sequence_pbch(sequence_t *seq,
lte_cp_t cp,
uint16_t cell_id);
LIBLTE_API int sequence_pcfich(sequence_t *seq,
uint8_t nslot,
uint16_t cell_id);
LIBLTE_API int sequence_phich(sequence_t *seq,
uint8_t nslot,
uint16_t cell_id);
LIBLTE_API int sequence_pdcch(sequence_t *seq,
uint8_t nslot,
uint16_t cell_id,
uint32_t len);
LIBLTE_API int sequence_pbch(sequence_t *seq, lte_cp_t cp, int cell_id);
LIBLTE_API int sequence_pcfich(sequence_t *seq, int nslot, int cell_id);
LIBLTE_API int sequence_phich(sequence_t *seq, int nslot, int cell_id);
LIBLTE_API int sequence_pdcch(sequence_t *seq, int nslot, int cell_id, int len);
LIBLTE_API int sequence_pdsch(sequence_t *seq, unsigned short rnti, int q,
int nslot, int cell_id, int len);
LIBLTE_API int sequence_pdsch(sequence_t *seq,
unsigned short rnti,
int q,
uint8_t nslot,
uint16_t cell_id,
uint32_t len);
#endif

61
lte/phy/include/liblte/phy/phch/dci.h
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@ -62,10 +62,10 @@ typedef enum {
} dci_spec_t;
typedef struct LIBLTE_API {
unsigned char nof_bits;
unsigned char L; // Aggregation level
unsigned char ncce; // Position of first CCE of the dci
unsigned short rnti;
uint8_t nof_bits;
uint8_t L; // Aggregation level
uint8_t ncce; // Position of first CCE of the dci
uint16_t rnti;
} dci_candidate_t;
typedef struct LIBLTE_API {
@ -75,28 +75,55 @@ typedef struct LIBLTE_API {
typedef struct LIBLTE_API {
dci_msg_t *msg;
int nof_dcis;
int max_dcis;
uint8_t nof_dcis;
uint8_t max_dcis;
} dci_t;
LIBLTE_API int dci_init(dci_t *q, int max_dci);
LIBLTE_API int dci_init(dci_t *q,
uint8_t max_dci);
LIBLTE_API void dci_free(dci_t *q);
LIBLTE_API char* dci_format_string(dci_format_t format);
LIBLTE_API int dci_msg_candidate_set(dci_msg_t *msg, int L, int nCCE, unsigned short rnti);
LIBLTE_API void dci_candidate_fprint(FILE *f, dci_candidate_t *q);
LIBLTE_API int dci_msg_candidate_set(dci_msg_t *msg,
uint8_t L,
uint8_t nCCE,
uint16_t rnti);
LIBLTE_API void dci_candidate_fprint(FILE *f,
dci_candidate_t *q);
LIBLTE_API int dci_msg_get_type(dci_msg_t *msg, dci_msg_type_t *type, int nof_prb, unsigned short crnti);
LIBLTE_API void dci_msg_type_fprint(FILE *f, dci_msg_type_t type);
LIBLTE_API int dci_msg_get_type(dci_msg_t *msg,
dci_msg_type_t *type,
uint8_t nof_prb,
uint16_t crnti);
LIBLTE_API void dci_msg_type_fprint(FILE *f,
dci_msg_type_t type);
// For dci_msg_type_t = PUSCH_SCHED
LIBLTE_API int dci_msg_pack_pusch(ra_pusch_t *data, dci_msg_t *msg, int nof_prb);
LIBLTE_API int dci_msg_unpack_pusch(dci_msg_t *msg, ra_pusch_t *data, int nof_prb);
LIBLTE_API int dci_msg_pack_pusch(ra_pusch_t *data,
dci_msg_t *msg,
uint8_t nof_prb);
// For dci_msg_type_t = PDSCH_SCHED
LIBLTE_API int dci_msg_pack_pdsch(ra_pdsch_t *data, dci_msg_t *msg, dci_format_t format, int nof_prb, bool crc_is_crnti);
LIBLTE_API int dci_msg_unpack_pdsch(dci_msg_t *msg, ra_pdsch_t *data, int nof_prb, bool crc_is_crnti);
LIBLTE_API int dci_msg_unpack_pusch(dci_msg_t *msg,
ra_pusch_t *data,
uint8_t nof_prb);
LIBLTE_API int dci_format_sizeof(dci_format_t format, int nof_prb);
// For dci_msg_type_t = PDSCH_SCHED
LIBLTE_API int dci_msg_pack_pdsch(ra_pdsch_t *data,
dci_msg_t *msg,
dci_format_t format,
uint8_t nof_prb,
bool crc_is_crnti);
LIBLTE_API int dci_msg_unpack_pdsch(dci_msg_t *msg,
ra_pdsch_t *data,
uint8_t nof_prb,
bool crc_is_crnti);
LIBLTE_API uint8_t dci_format_sizeof(dci_format_t format,
uint8_t nof_prb);
#endif // DCI_

21
lte/phy/include/liblte/phy/phch/pbch.h
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@ -85,12 +85,25 @@ typedef struct LIBLTE_API {
}pbch_t;
LIBLTE_API int pbch_init(pbch_t *q, int nof_prb, int cell_id, lte_cp_t cp);
LIBLTE_API int pbch_init(pbch_t *q,
int nof_prb,
int cell_id,
lte_cp_t cp);
LIBLTE_API void pbch_free(pbch_t *q);
LIBLTE_API int pbch_decode(pbch_t *q, cf_t *slot1_symbols, cf_t *ce[MAX_PORTS], pbch_mib_t *mib);
LIBLTE_API void pbch_encode(pbch_t *q, pbch_mib_t *mib, cf_t *slot1_symbols[MAX_PORTS], int nof_ports);
LIBLTE_API int pbch_decode(pbch_t *q,
cf_t *slot1_symbols,
cf_t *ce[MAX_PORTS],
pbch_mib_t *mib);
LIBLTE_API void pbch_encode(pbch_t *q,
pbch_mib_t *mib,
cf_t *slot1_symbols[MAX_PORTS],
int nof_ports);
LIBLTE_API void pbch_decode_reset(pbch_t *q);
LIBLTE_API void pbch_mib_fprint(FILE *stream, pbch_mib_t *mib);
LIBLTE_API void pbch_mib_fprint(FILE *stream,
pbch_mib_t *mib);
#endif // PBCH_

29
lte/phy/include/liblte/phy/phch/pcfich.h
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@ -45,11 +45,8 @@ typedef _Complex float cf_t;
/* PCFICH object */
typedef struct LIBLTE_API {
int cell_id;
lte_cp_t cp;
lte_cell_t cell;
int nof_symbols;
int nof_prb;
int nof_ports;
/* handler to REGs resource mapper */
regs_t *regs;
@ -70,16 +67,22 @@ typedef struct LIBLTE_API {
} pcfich_t;
LIBLTE_API int pcfich_init(pcfich_t *q, regs_t *regs, int cell_id, int nof_prb,
int nof_tx_ports, lte_cp_t cp);
LIBLTE_API int pcfich_init(pcfich_t *q,
regs_t *regs,
lte_cell_t cell);
LIBLTE_API void pcfich_free(pcfich_t *q);
LIBLTE_API int pcfich_decode(pcfich_t *q, cf_t *slot_symbols, cf_t *ce[MAX_PORTS],
int nsubframe, int *cfi, int *distance);
LIBLTE_API int pcfich_encode(pcfich_t *q, int cfi, cf_t *slot_symbols[MAX_PORTS],
int nsubframe);
LIBLTE_API bool pcfich_exists(int nframe, int nslot);
LIBLTE_API int pcfich_put(regs_t *h, cf_t *pcfich, cf_t *slot_data);
LIBLTE_API int pcfich_get(regs_t *h, cf_t *pcfich, cf_t *slot_data);
LIBLTE_API int pcfich_decode(pcfich_t *q,
cf_t *sf_symbols,
cf_t *ce[MAX_PORTS],
uint8_t subframe,
uint8_t *cfi,
uint8_t *distance);
LIBLTE_API int pcfich_encode(pcfich_t *q,
uint8_t cfi,
cf_t *sf_symbols[MAX_PORTS],
uint8_t subframe);
#endif

77
lte/phy/include/liblte/phy/phch/pdcch.h
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@ -56,20 +56,18 @@ typedef enum LIBLTE_API {
* DCI messages as defined in Section 7.1 of 36.213
*/
typedef struct LIBLTE_API {
int nof_candidates;
uint8_t nof_candidates;
dci_candidate_t candidates[NSUBFRAMES_X_FRAME][MAX_CANDIDATES];
} pdcch_search_t;
/* PDCCH object */
typedef struct LIBLTE_API {
int cell_id;
lte_cp_t cp;
int nof_prb;
int nof_bits;
int nof_symbols;
int nof_ports;
int nof_regs;
int nof_cce;
lte_cell_t cell;
uint16_t nof_bits;
uint16_t nof_symbols;
uint16_t nof_regs;
uint16_t nof_cce;
uint16_t max_bits;
pdcch_search_t search_mode[PDCCH_NOF_SEARCH_MODES];
pdcch_search_mode_t current_search_mode;
@ -92,15 +90,19 @@ typedef struct LIBLTE_API {
crc_t crc;
} pdcch_t;
LIBLTE_API int pdcch_init(pdcch_t *q, regs_t *regs, int nof_prb, int nof_ports,
int cell_id, lte_cp_t cp);
LIBLTE_API int pdcch_init(pdcch_t *q,
regs_t *regs,
lte_cell_t cell);
LIBLTE_API void pdcch_free(pdcch_t *q);
LIBLTE_API int pdcch_set_cfi(pdcch_t *q, int cfi);
/* Encoding functions */
LIBLTE_API int pdcch_encode(pdcch_t *q, dci_t *dci, cf_t *slot_symbols[MAX_PORTS],
int nsubframe);
LIBLTE_API int pdcch_encode(pdcch_t *q,
dci_t *dci,
cf_t *slot_symbols[MAX_PORTS],
uint8_t nsubframe,
uint8_t cfi);
/* Decoding functions */
@ -109,21 +111,48 @@ LIBLTE_API int pdcch_encode(pdcch_t *q, dci_t *dci, cf_t *slot_symbols[MAX_PORTS
* b) call pdcch_extract_llr() and then call pdcch_decode_si/ue/ra
*/
LIBLTE_API int pdcch_decode(pdcch_t *q, cf_t *slot_symbols, cf_t *ce[MAX_PORTS],
dci_t *dci, int nsubframe);
LIBLTE_API int pdcch_extract_llr(pdcch_t *q, cf_t *slot_symbols, cf_t *ce[MAX_PORTS],
float *llr, int nsubframe);
LIBLTE_API int pdcch_decode(pdcch_t *q,
cf_t *slot_symbols,
cf_t *ce[MAX_PORTS],
dci_t *dci,
uint8_t nsubframe,
uint8_t cfi);
LIBLTE_API int pdcch_extract_llr(pdcch_t *q,
cf_t *slot_symbols,
cf_t *ce[MAX_PORTS],
float *llr,
uint8_t nsubframe,
uint8_t cfi);
LIBLTE_API int pdcch_init_search_si(pdcch_t *q,
uint8_t cfi);
LIBLTE_API void pdcch_init_search_si(pdcch_t *q);
LIBLTE_API void pdcch_set_search_si(pdcch_t *q);
LIBLTE_API int pdcch_decode_si(pdcch_t *q, float *llr, dci_t *dci);
LIBLTE_API void pdcch_init_search_ue(pdcch_t *q, unsigned short c_rnti);
LIBLTE_API int pdcch_decode_si(pdcch_t *q,
float *llr,
dci_t *dci);
LIBLTE_API int pdcch_init_search_ue(pdcch_t *q,
uint16_t c_rnti,
uint8_t cfi);
LIBLTE_API void pdcch_set_search_ue(pdcch_t *q);
LIBLTE_API int pdcch_decode_ue(pdcch_t *q, float *llr, dci_t *dci, int nsubframe);
LIBLTE_API void pdcch_init_search_ra(pdcch_t *q, unsigned short ra_rnti);
LIBLTE_API int pdcch_decode_ue(pdcch_t *q,
float *llr,
dci_t *dci,
uint8_t nsubframe);
LIBLTE_API int pdcch_init_search_ra(pdcch_t *q,
uint16_t ra_rnti,
uint8_t cfi);
LIBLTE_API void pdcch_set_search_ra(pdcch_t *q);
LIBLTE_API int pdcch_decode_ra(pdcch_t *q, float *llr, dci_t *dci);
LIBLTE_API int pdcch_decode_ra(pdcch_t *q,
float *llr,
dci_t *dci);
#endif

44
lte/phy/include/liblte/phy/phch/pdsch.h
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@ -49,12 +49,10 @@ typedef _Complex float cf_t;
/* PDSCH object */
typedef struct LIBLTE_API {
int cell_id;
lte_cp_t cp;
int nof_prb;
int nof_ports;
int max_symbols;
unsigned short rnti;
lte_cell_t cell;
uint16_t max_symbols;
uint16_t rnti;
/* buffers */
cf_t *ce[MAX_PORTS];
@ -78,17 +76,31 @@ typedef struct LIBLTE_API {
crc_t crc_cb;
}pdsch_t;
LIBLTE_API int pdsch_init(pdsch_t *q, unsigned short user_rnti, int nof_prb,
int nof_ports, int cell_id, lte_cp_t cp);
LIBLTE_API int pdsch_init(pdsch_t *q,
uint16_t user_rnti,
lte_cell_t cell);
LIBLTE_API void pdsch_free(pdsch_t *q);
LIBLTE_API int pdsch_encode(pdsch_t *q, char *data, cf_t *sf_symbols[MAX_PORTS],
int nsubframe, ra_mcs_t mcs, ra_prb_t *prb_alloc);
LIBLTE_API int pdsch_decode(pdsch_t *q, cf_t *sf_symbols, cf_t *ce[MAX_PORTS],
char *data, int nsubframe, ra_mcs_t mcs, ra_prb_t *prb_alloc);
LIBLTE_API int pdsch_get(pdsch_t *q, cf_t *sf_symbols, cf_t *pdsch_symbols,
ra_prb_t *prb_alloc, int nsubframe);
LIBLTE_API int pdsch_put(pdsch_t *q, cf_t *pdsch_symbols, cf_t *sf_symbols,
ra_prb_t *prb_alloc, int nsubframe);
LIBLTE_API int pdsch_encode(pdsch_t *q,
char *data,
cf_t *sf_symbols[MAX_PORTS],
uint8_t nsubframe,
ra_mcs_t mcs,
ra_prb_t *prb_alloc);
LIBLTE_API int pdsch_decode(pdsch_t *q,
cf_t *sf_symbols,
cf_t *ce[MAX_PORTS],
char *data,
uint8_t nsubframe,
ra_mcs_t mcs,
ra_prb_t *prb_alloc);
LIBLTE_API int pdsch_get(pdsch_t *q,
cf_t *sf_symbols,
cf_t *pdsch_symbols,
ra_prb_t *prb_alloc,
uint8_t subframe);
#endif

39
lte/phy/include/liblte/phy/phch/phich.h
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@ -55,9 +55,7 @@ typedef _Complex float cf_t;
/* phich object */
typedef struct LIBLTE_API {
lte_cp_t cp;
int nof_prb;
int nof_tx_ports;
lte_cell_t cell;
/* handler to REGs resource mapper */
regs_t *regs;
@ -80,18 +78,31 @@ typedef struct LIBLTE_API {
}phich_t;
LIBLTE_API int phich_init(phich_t *q, regs_t *regs, int cell_id, int nof_prb, int nof_tx_ports, lte_cp_t cp);
LIBLTE_API void phich_free(phich_t *q);
LIBLTE_API int phich_decode(phich_t *q, cf_t *slot_symbols, cf_t *ce[MAX_PORTS],
int ngroup, int nseq, int nsubframe, char *ack, int *distance);
LIBLTE_API int phich_encode(phich_t *q, char ack, int ngroup, int nseq, int nsubframe,
cf_t *slot_symbols[MAX_PORTS]);
LIBLTE_API int phich_init(phich_t *q,
regs_t *regs,
lte_cell_t cell);
LIBLTE_API void phich_free(phich_t *q);
LIBLTE_API void phich_reset(phich_t *q, cf_t *slot_symbols[MAX_PORTS]);
LIBLTE_API int phich_ngroups(phich_t *q);
LIBLTE_API bool phich_exists(int nframe, int nslot);
LIBLTE_API int phich_put(regs_t *h, cf_t *phich, cf_t *slot_data);
LIBLTE_API int phich_get(regs_t *h, cf_t *phich, cf_t *slot_data);
LIBLTE_API int phich_decode(phich_t *q,
cf_t *slot_symbols,
cf_t *ce[MAX_PORTS],
uint8_t ngroup,
uint8_t nseq,
uint8_t nsubframe,
char *ack,
uint8_t *distance);
LIBLTE_API int phich_encode(phich_t *q,
char ack,
uint8_t ngroup,
uint8_t nseq,
uint8_t nsubframe,
cf_t *slot_symbols[MAX_PORTS]);
LIBLTE_API void phich_reset(phich_t *q,
cf_t *slot_symbols[MAX_PORTS]);
LIBLTE_API uint8_t phich_ngroups(phich_t *q);
#endif // PHICH_

2
lte/phy/include/liblte/phy/phch/prach.h
Unescape Escape View File

@ -46,7 +46,7 @@ typedef _Complex float cf_t;
* Based on 3GPP TS 36.211 version 10.7.0 Release 10.
*/
typedef struct LIBLTE_API{
typedef struct LIBLTE_API {
// Parameters from higher layers (extracted from SIB2)
uint32_t f; // preamble format
uint32_t rsi; // rootSequenceIndex

82
lte/phy/include/liblte/phy/phch/regs.h
Unescape Escape View File

@ -45,57 +45,79 @@
typedef _Complex float cf_t;
typedef struct LIBLTE_API {
int k[4];
int k0;
int l;
uint16_t k[4];
uint16_t k0;
uint8_t l;
bool assigned;
}regs_reg_t;
typedef struct LIBLTE_API {
int nof_regs;
uint16_t nof_regs;
regs_reg_t **regs;
}regs_ch_t;
typedef struct LIBLTE_API {
int cell_id;
int nof_prb;
int max_ctrl_symbols;
int cfi;
int ngroups_phich;
int nof_ports;
lte_cp_t cp;
lte_cell_t cell;
uint8_t max_ctrl_symbols;
uint8_t cfi;
bool cfi_initiated;
uint8_t ngroups_phich;
phich_resources_t phich_res;
phich_length_t phich_len;
regs_ch_t pcfich;
regs_ch_t *phich; // there are several phich
regs_ch_t pdcch[3]; /* PDCCH indexing, permutation and interleaving is computed for
the three possible CFI value */
int nof_regs;
uint16_t nof_regs;
regs_reg_t *regs;
}regs_t;
LIBLTE_API int regs_init(regs_t *h, int cell_id, int nof_prb, int nof_ports,
phich_resources_t phich_res, phich_length_t phich_len, lte_cp_t cp);
LIBLTE_API int regs_init(regs_t *h,
phich_resources_t phich_res,
phich_length_t phich_len,
lte_cell_t cell);
LIBLTE_API void regs_free(regs_t *h);
LIBLTE_API int regs_set_cfi(regs_t *h, int nof_ctrl_symbols);
LIBLTE_API int regs_set_cfi(regs_t *h,
uint8_t nof_ctrl_symbols);
LIBLTE_API int regs_put_reg(regs_reg_t *reg, cf_t *reg_data, cf_t *slot_symbols, int nof_prb);
LIBLTE_API int regs_add_reg(regs_reg_t *reg, cf_t *reg_data, cf_t *slot_symbols, int nof_prb);
LIBLTE_API int regs_get_reg(regs_reg_t *reg, cf_t *slot_symbols, cf_t *reg_data, int nof_prb);
LIBLTE_API int regs_reset_reg(regs_reg_t *reg, cf_t *slot_symbols, int nof_prb);
LIBLTE_API uint16_t regs_pcfich_nregs(regs_t *h);
LIBLTE_API int regs_pcfich_put(regs_t *h,
cf_t pcfich_symbols[REGS_PCFICH_NSYM],
cf_t *slot_symbols);
LIBLTE_API int regs_pcfich_nregs(regs_t *h);
LIBLTE_API int regs_pcfich_put(regs_t *h, cf_t pcfich_symbols[REGS_PCFICH_NSYM], cf_t *slot_symbols);
LIBLTE_API int regs_pcfich_get(regs_t *h, cf_t *slot_symbols, cf_t pcfich_symbols[REGS_PCFICH_NSYM]);
LIBLTE_API int regs_pcfich_get(regs_t *h,
cf_t *slot_symbols,
cf_t pcfich_symbols[REGS_PCFICH_NSYM]);
LIBLTE_API int regs_phich_nregs(regs_t *h);
LIBLTE_API int regs_phich_add(regs_t *h, cf_t phich_symbols[REGS_PHICH_NSYM], int ngroup, cf_t *slot_symbols);
LIBLTE_API int regs_phich_get(regs_t *h, cf_t *slot_symbols, cf_t phich_symbols[REGS_PHICH_NSYM], int ngroup);
LIBLTE_API int regs_phich_ngroups(regs_t *h);
LIBLTE_API int regs_phich_reset(regs_t *h, cf_t *slot_symbols);
LIBLTE_API uint16_t regs_phich_nregs(regs_t *h);
LIBLTE_API int regs_phich_add(regs_t *h,
cf_t phich_symbols[REGS_PHICH_NSYM],
uint8_t ngroup,
cf_t *slot_symbols);
LIBLTE_API int regs_pdcch_nregs(regs_t *h, int cfi);
LIBLTE_API int regs_pdcch_put(regs_t *h, cf_t *pdcch_symbols, cf_t *slot_symbols);
LIBLTE_API int regs_pdcch_get(regs_t *h, cf_t *slot_symbols, cf_t *pdcch_symbols);
LIBLTE_API int regs_phich_get(regs_t *h,
cf_t *slot_symbols,
cf_t phich_symbols[REGS_PHICH_NSYM],
uint8_t ngroup);
LIBLTE_API uint8_t regs_phich_ngroups(regs_t *h);
LIBLTE_API int regs_phich_reset(regs_t *h,
cf_t *slot_symbols);
LIBLTE_API int regs_pdcch_nregs(regs_t *h, uint8_t cfi);
LIBLTE_API int regs_pdcch_put(regs_t *h,
cf_t *pdcch_symbols,
cf_t *slot_symbols);
LIBLTE_API int regs_pdcch_get(regs_t *h,
cf_t *slot_symbols,
cf_t *pdcch_symbols);
#endif // REGS_H_

1
lte/phy/include/liblte/phy/phy.h
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@ -50,7 +50,6 @@
#include "liblte/phy/common/phy_common.h"
#include "liblte/phy/common/fft.h"
#include "liblte/phy/common/sequence.h"
#include "liblte/phy/ch_estimation/chest.h"
#include "liblte/phy/ch_estimation/refsignal.h"

1
lte/phy/include/liblte/phy/sync/sync_frame.h
Unescape Escape View File

@ -56,6 +56,7 @@ typedef struct LIBLTE_API {
sync_t s;
enum sync_frame_state state;
int downsampling;
resample_arb_t resample;
unsigned long frame_cnt;
bool fb_wp;
int frame_size;

297
lte/phy/lib/ch_estimation/src/chest.c
Unescape Escape View File

@ -29,7 +29,6 @@
#include <strings.h>
#include <string.h>
#include <complex.h>
#include <assert.h>
#include <math.h>
#include "liblte/phy/ch_estimation/chest.h"
@ -40,7 +39,7 @@
#define SLOT_SZ(q) (q->nof_symbols * q->symbol_sz)
#define SF_SZ(q) (2 * SLOT_SZ(q))
void chest_fprint(chest_t *q, FILE *stream, int nslot, int port_id) {
void chest_fprint(chest_t *q, FILE *stream, uint8_t nslot, uint8_t port_id) {
chest_ref_fprint(q, stream, nslot, port_id);
chest_recvsig_fprint(q, stream, nslot, port_id);
chest_ce_fprint(q, stream, nslot, port_id);
@ -49,13 +48,16 @@ void chest_fprint(chest_t *q, FILE *stream, int nslot, int port_id) {
/* Sets the number of ports to estimate. nof_ports must be smaler than nof_ports
* used during the call to chest_init().
*/
void chest_set_nof_ports(chest_t *q, int nof_ports) {
if (nof_ports < q->nof_ports && nof_ports > 0) {
int chest_set_nof_ports(chest_t *q, uint8_t nof_ports) {
if (nof_ports < q->nof_ports) {
q->nof_ports = nof_ports;
return LIBLTE_SUCCESS;
} else {
return LIBLTE_ERROR_INVALID_INPUTS;
}
}
void chest_ref_fprint(chest_t *q, FILE *stream, int nslot, int port_id) {
void chest_ref_fprint(chest_t *q, FILE *stream, uint8_t nslot, uint8_t port_id) {
int i;
fprintf(stream, "refs%d=[",port_id);
for (i=0;i<q->refsignal[port_id][nslot].nof_refs;i++) {
@ -65,7 +67,7 @@ void chest_ref_fprint(chest_t *q, FILE *stream, int nslot, int port_id) {
fprintf(stream, "];\n");
}
void chest_recvsig_fprint(chest_t *q, FILE *stream, int nslot, int port_id) {
void chest_recvsig_fprint(chest_t *q, FILE *stream, uint8_t nslot, uint8_t port_id) {
int i;
fprintf(stream, "recvsig%d=[",port_id);
for (i=0;i<q->refsignal[port_id][nslot].nof_refs;i++) {
@ -75,7 +77,7 @@ void chest_recvsig_fprint(chest_t *q, FILE *stream, int nslot, int port_id) {
fprintf(stream, "];\n");
}
void chest_ce_fprint(chest_t *q, FILE *stream, int nslot, int port_id) {
void chest_ce_fprint(chest_t *q, FILE *stream, uint8_t nslot, uint8_t port_id) {
int i;
fprintf(stream, "mag%d=[",port_id);
for (i=0;i<q->refsignal[port_id][nslot].nof_refs;i++) {
@ -89,164 +91,206 @@ void chest_ce_fprint(chest_t *q, FILE *stream, int nslot, int port_id) {
fprintf(stream, "];\n");
}
void chest_ce_ref(chest_t *q, cf_t *input, int nslot, int port_id, int nref) {
int chest_ce_ref(chest_t *q, cf_t *input, uint8_t nslot, uint8_t port_id, uint16_t nref) {
int fidx, tidx;
cf_t known_ref, channel_ref;
fidx = q->refsignal[port_id][nslot].refs[nref].freq_idx; // reference frequency index
tidx = q->refsignal[port_id][nslot].refs[nref].time_idx; // reference time index
known_ref = q->refsignal[port_id][nslot].refs[nref].simbol;
channel_ref = input[SAMPLE_IDX(q->nof_prb, tidx, fidx)];
q->refsignal[port_id][nslot].refs[nref].recv_simbol = channel_ref;
DEBUG("Reference %2d pos (%2d,%2d)=%3d %.2f dB %.2f/%.2f=%.2f\n", nref, tidx, fidx, SAMPLE_IDX(q->nof_prb, tidx, fidx),
10*log10f(cabsf(channel_ref/known_ref)),
cargf(channel_ref)/M_PI,cargf(known_ref)/M_PI,cargf(channel_ref/known_ref)/M_PI);
/* FIXME: compare with threshold */
if (channel_ref != 0) {
q->refsignal[port_id][nslot].ch_est[nref] = channel_ref/known_ref;
} else {
q->refsignal[port_id][nslot].ch_est[nref] = 0;
int ret = LIBLTE_ERROR_INVALID_INPUTS;
if (q != NULL &&
input != NULL &&
nslot < NSLOTS_X_FRAME &&
port_id < q->nof_ports)
{
if (nref < q->refsignal[port_id][nslot].nof_refs) {
fidx = q->refsignal[port_id][nslot].refs[nref].freq_idx; // reference frequency index
tidx = q->refsignal[port_id][nslot].refs[nref].time_idx; // reference time index
known_ref = q->refsignal[port_id][nslot].refs[nref].simbol;
channel_ref = input[tidx * q->nof_re + fidx];
q->refsignal[port_id][nslot].refs[nref].recv_simbol = channel_ref;
DEBUG("Reference %2d pos (%2d,%2d)=%3d %.2f dB %.2f/%.2f=%.2f\n", nref, tidx, fidx, tidx * q->nof_re + fidx,
10*log10f(cabsf(channel_ref/known_ref)),
cargf(channel_ref)/M_PI,cargf(known_ref)/M_PI,
cargf(channel_ref/known_ref)/M_PI);
/* FIXME: compare with threshold */
if (channel_ref != 0) {
q->refsignal[port_id][nslot].ch_est[nref] = channel_ref/known_ref;
} else {
q->refsignal[port_id][nslot].ch_est[nref] = 0;
}
ret = LIBLTE_SUCCESS;
}
}
return ret;
}
/* Computes channel estimates for each reference in a slot and port.
* Saves the nof_prb * 12 * nof_symbols channel estimates in the array ce
*/
void chest_ce_slot_port(chest_t *q, cf_t *input, cf_t *ce, int nslot, int port_id) {
int chest_ce_slot_port(chest_t *q, cf_t *input, cf_t *ce, uint8_t nslot, uint8_t port_id) {
int i, j;
cf_t x[2], y[MAX_NSYMB];
assert(nslot >= 0 && nslot < NSLOTS_X_FRAME);
assert(port_id >= 0 && port_id < q->nof_ports);
assert(q->refsignal[port_id][nslot].nsymbols <= 2);
int ret = LIBLTE_ERROR_INVALID_INPUTS;
refsignal_t *r = &q->refsignal[port_id][nslot];
if (q != NULL &&
input != NULL &&
nslot < NSLOTS_X_FRAME &&
port_id < q->nof_ports)
{
if (q->refsignal[port_id][nslot].nsymbols <= 2) {
refsignal_t *r = &q->refsignal[port_id][nslot];
INFO("Estimating channel slot=%d port=%d using %d reference signals\n",
nslot, port_id, r->nof_refs);
INFO("Estimating channel slot=%d port=%d using %d reference signals\n",
nslot, port_id, r->nof_refs);
for (i=0;i<r->nof_refs;i++) {
chest_ce_ref(q, input, nslot, port_id, i);
}
for (i=0;i<r->nof_refs;i++) {
chest_ce_ref(q, input, nslot, port_id, i);
}
/* interpolate the symbols with references
* in the freq domain */
for (i=0;i<r->nsymbols;i++) {
interp_linear_offset(&r->ch_est[i * r->nof_refs/2],
&ce[r->symbols_ref[i] * q->nof_prb * RE_X_RB], RE_X_RB/2,
r->nof_refs/2, r->voffset, RE_X_RB/2-r->voffset);
/* interpolate the symbols with references
* in the freq domain */
for (i=0;i<r->nsymbols;i++) {
interp_linear_offset(&r->ch_est[i * r->nof_refs/2],
&ce[r->symbols_ref[i] * q->nof_re], RE_X_RB/2,
r->nof_refs/2, r->voffset, RE_X_RB/2-r->voffset);
}
/* now interpolate in the time domain */
for (i=0;i<q->nof_prb * RE_X_RB; i++) {
if (r->nsymbols > 1) {
for (j=0;j<r->nsymbols;j++) {
x[j] = ce[r->symbols_ref[j] * q->nof_prb * RE_X_RB + i];
}
interp_linear_offset(x, y, r->symbols_ref[1]-r->symbols_ref[0],
2, r->symbols_ref[0], 3);
} else {
for (j=0;j<MAX_NSYMB;j++) {
y[j] = ce[r->symbols_ref[0] * q->nof_prb * RE_X_RB + i];
/* now interpolate in the time domain */
for (i=0;i<q->nof_re; i++) {
if (r->nsymbols > 1) {
for (j=0;j<r->nsymbols;j++) {
x[j] = ce[r->symbols_ref[j] * q->nof_re + i];
}
interp_linear_offset(x, y, r->symbols_ref[1]-r->symbols_ref[0],
2, r->symbols_ref[0], 3);
} else {
for (j=0;j<MAX_NSYMB;j++) {
y[j] = ce[r->symbols_ref[0] * q->nof_re + i];
}
}
for (j=0;j<q->nof_symbols;j++) {
ce[j * q->nof_re + i] = y[j];
}
}
}
for (j=0;j<q->nof_symbols;j++) {
ce[j * q->nof_prb * RE_X_RB + i] = y[j];
ret = LIBLTE_SUCCESS;
}
}
return ret;
}
/* Computes channel estimates for each reference in a subframe and port id.
*/
void chest_ce_sf_port(chest_t *q, cf_t *input, cf_t *ce, int sf_idx, int port_id) {
int n, slotsz;
slotsz = CP_NSYMB(q->cp)*q->nof_prb*RE_X_RB;
int chest_ce_sf_port(chest_t *q, cf_t *input, cf_t *ce, uint8_t sf_idx, uint8_t port_id) {
int n, slotsz, ret;
slotsz = q->nof_symbols*q->nof_re;
for (n=0;n<2;n++) {
chest_ce_slot_port(q, &input[n*slotsz], &ce[n*slotsz], 2*sf_idx+n, port_id);
ret = chest_ce_slot_port(q, &input[n*slotsz], &ce[n*slotsz], 2*sf_idx+n, port_id);
if (ret != LIBLTE_SUCCESS) {
return ret;
}
}
return LIBLTE_SUCCESS;
}
/* Computes channel estimates for each reference in a slot for all ports.
*/
void chest_ce_slot(chest_t *q, cf_t *input, cf_t **ce, int nslot) {
int p;
int chest_ce_slot(chest_t *q, cf_t *input, cf_t **ce, uint8_t nslot) {
int p, ret;
for (p=0;p<q->nof_ports;p++) {
chest_ce_slot_port(q, input, ce[p], nslot, p);
ret = chest_ce_slot_port(q, input, ce[p], nslot, p);
if (ret != LIBLTE_SUCCESS) {
return ret;
}
}
return LIBLTE_SUCCESS;
}
/* Computes channel estimates for each reference in a subframe for all ports.
*/
void chest_ce_sf(chest_t *q, cf_t *input, cf_t *ce[MAX_PORTS], int sf_idx) {
int p, n, slotsz;
slotsz = CP_NSYMB(q->cp)*q->nof_prb*RE_X_RB;
int chest_ce_sf(chest_t *q, cf_t *input, cf_t *ce[MAX_PORTS], uint8_t sf_idx) {
int p, n, slotsz, ret;
slotsz = q->nof_symbols*q->nof_re;
for (p=0;p<q->nof_ports;p++) {
for (n=0;n<2;n++) {
chest_ce_slot_port(q, &input[n*slotsz], &ce[p][n*slotsz], 2*sf_idx+n, p);
ret = chest_ce_slot_port(q, &input[n*slotsz], &ce[p][n*slotsz], 2*sf_idx+n, p);
if (ret != LIBLTE_SUCCESS) {
return ret;
}
}
}
return LIBLTE_SUCCESS;
}
int chest_init(chest_t *q, chest_interp_t interp, lte_cp_t cp, int nof_prb, int nof_ports) {
if (nof_ports > MAX_PORTS) {
fprintf(stderr, "Error: Maximum ports %d\n", MAX_PORTS);
return -1;
}
bzero(q, sizeof(chest_t));
int chest_init(chest_t *q, chest_interp_t interp, uint16_t nof_re, uint8_t nof_symbols, uint8_t nof_ports) {
int ret = LIBLTE_ERROR_INVALID_INPUTS;
q->nof_ports = nof_ports;
q->nof_symbols = CP_NSYMB(cp);
q->cp = cp;
q->nof_prb = nof_prb;
if (q != NULL &&
nof_ports < MAX_PORTS)
{
bzero(q, sizeof(chest_t));
switch(interp) {
case LINEAR:
q->interp = interp_linear_offset;
}
q->nof_ports = nof_ports;
q->nof_symbols = nof_symbols;
q->nof_re = nof_re;
INFO("Initializing channel estimator size %dx%d, nof_ports=%d\n",
q->nof_symbols, nof_prb, nof_ports);
switch(interp) {
case LINEAR:
q->interp = interp_linear_offset;
}
return 0;
}
INFO("Initializing channel estimator size %dx%d, nof_ports=%d\n",
q->nof_symbols, q->nof_re, nof_ports);
int chest_ref_LTEDL_slot_port(chest_t *q, int port, int nslot, int cell_id) {
if (port < 0 || port > q->nof_ports) {
return -1;
}
if (nslot < 0 || nslot > NSLOTS_X_FRAME) {
return -1;
ret = LIBLTE_SUCCESS;
}
return ret;
}
if (refsignal_init_LTEDL(&q->refsignal[port][nslot], port, nslot, cell_id, q->cp, q->nof_prb)) {
fprintf(stderr, "Error initiating CRS port=%d, slot=%d\n", port, nslot);
return -1;
int chest_init_LTEDL(chest_t *q, chest_interp_t interp, lte_cell_t cell) {
int ret;
ret = chest_init(q, interp, cell.nof_prb * RE_X_RB, CP_NSYMB(cell.cp), cell.nof_ports);
if (ret != LIBLTE_SUCCESS) {
return ret;
} else {
return chest_ref_LTEDL(q, cell);
}
}
return 0;
int chest_ref_LTEDL_slot_port(chest_t *q, uint8_t nslot, uint8_t port_id, lte_cell_t cell) {
int ret = LIBLTE_ERROR_INVALID_INPUTS;
if (q != NULL &&
port_id < MAX_PORTS &&
nslot < NSLOTS_X_FRAME)
{
ret = refsignal_init_LTEDL(&q->refsignal[port_id][nslot], port_id, nslot, cell);
}
return ret;
}
int chest_ref_LTEDL_slot(chest_t *q, int nslot, int cell_id) {
int p;
int chest_ref_LTEDL_slot(chest_t *q, uint8_t nslot, lte_cell_t cell) {
int p, ret;
for (p=0;p<q->nof_ports;p++) {
if (chest_ref_LTEDL_slot_port(q, p, nslot, cell_id)) {
return -1;
ret = chest_ref_LTEDL_slot_port(q, nslot, p, cell);
if (ret != LIBLTE_SUCCESS) {
return ret;
}
}
return 0;
return LIBLTE_SUCCESS;
}
int chest_ref_LTEDL(chest_t *q, int cell_id) {
int n;
int chest_ref_LTEDL(chest_t *q, lte_cell_t cell) {
int n, ret;
for (n=0;n<NSLOTS_X_FRAME;n++) {
if (chest_ref_LTEDL_slot(q, n, cell_id)) {
return -1;
ret = chest_ref_LTEDL_slot(q, n, cell);
if (ret != LIBLTE_SUCCESS) {
return ret;
}
}
return 0;
return LIBLTE_SUCCESS;
}
void chest_free(chest_t *q) {
@ -262,12 +306,17 @@ void chest_free(chest_t *q) {
/* Fills l[2] with the symbols in the slot nslot that contain references.
* returns the number of symbols with references (in the slot)
*/
int chest_ref_symbols(chest_t *q, int port_id, int nslot, int l[2]) {
if (nslot < 0 || nslot > NSLOTS_X_FRAME) {
return -1;
int chest_ref_symbols(chest_t *q, uint8_t port_id, uint8_t nslot, uint8_t l[2]) {
if (q != NULL &&
port_id < MAX_PORTS &&
nslot < NSLOTS_X_FRAME)
{
memcpy(l, q->refsignal[port_id][nslot].symbols_ref, sizeof(uint8_t) * q->refsignal[port_id][nslot].nsymbols);
return q->refsignal[port_id][nslot].nsymbols;
} else {
return LIBLTE_ERROR_INVALID_INPUTS;
}
memcpy(l, q->refsignal[port_id][nslot].symbols_ref, sizeof(int) * q->refsignal[port_id][nslot].nsymbols);
return q->refsignal[port_id][nslot].nsymbols;
}
@ -275,6 +324,8 @@ int chest_ref_symbols(chest_t *q, int port_id, int nslot, int l[2]) {
*/
int chest_initialize(chest_hl* h) {
lte_cell_t cell;
if (!h->init.nof_symbols) {
h->init.nof_symbols = CPNORM_NSYMB; // Normal CP
}
@ -282,37 +333,23 @@ int chest_initialize(chest_hl* h) {
h->init.nof_prb = 6;
}
if (chest_init(&h->obj, LINEAR, (h->init.nof_symbols==CPNORM_NSYMB)?CPNORM:CPEXT,
h->init.nof_prb, h->init.nof_ports)) {
cell.id = h->init.cell_id;
cell.nof_ports = h->init.nof_ports;
cell.nof_prb = h->init.nof_prb;
cell.cp = h->init.nof_symbols == CPNORM_NSYMB ? CPNORM : CPEXT;
if (chest_init_LTEDL(&h->obj, LINEAR, cell)) {
fprintf(stderr, "Error initializing equalizer\n");
return -1;
}
if (h->init.cell_id != -1) {
if (chest_ref_LTEDL(&h->obj, h->init.cell_id)) {
fprintf(stderr, "Error initializing reference signal\n");
return -1;
}
}
return 0;
}
/** This function must be called in an slot basis (0.5ms) for LTE */
/** This function must be called in an subframe basis (1ms) for LTE */
int chest_work(chest_hl* hl) {
int i;
chest_t *q = &hl->obj;
if (hl->init.cell_id != hl->ctrl_in.cell_id) {
if (chest_ref_LTEDL(q, hl->init.cell_id)) {
fprintf(stderr, "Error initializing reference signal\n");
return -1;
}
}
for (i=0;i<hl->init.nof_ports;i++) {
chest_ce_slot_port(q, hl->input, hl->output[i], 1, 0);
hl->out_len[i] = hl->in_len;
}
chest_ce_sf(q, hl->input, hl->output, hl->ctrl_in.sf_idx);
return 0;
}

153
lte/phy/lib/ch_estimation/src/refsignal.c
Unescape Escape View File

@ -40,7 +40,7 @@
#define idx(x, y) (l*nof_refs_x_symbol+i)
int refsignal_v(int port_id, int ns, int symbol_id) {
int refsignal_v(uint8_t port_id, uint8_t ns, uint8_t symbol_id) {
int v=-1;
switch(port_id) {
case 0:
@ -67,108 +67,121 @@ int refsignal_v(int port_id, int ns, int symbol_id) {
return v;
}
int refsignal_k(int m, int v, int cell_id) {
int refsignal_k(int m, int v, uint16_t cell_id) {
return 6*m+((v+(cell_id%6))%6);
}
void refsignal_put(refsignal_t *q, cf_t *slot_symbols) {
int refsignal_put(refsignal_t *q, cf_t *slot_symbols) {
int i;
int fidx, tidx;
for (i=0;i<q->nof_refs;i++) {
fidx = q->refs[i].freq_idx; // reference frequency index
tidx = q->refs[i].time_idx; // reference time index
slot_symbols[SAMPLE_IDX(q->nof_prb, tidx, fidx)] = q->refs[i].simbol;
uint16_t fidx, tidx;
if (q != NULL &&
slot_symbols != NULL)
{
for (i=0;i<q->nof_refs;i++) {
fidx = q->refs[i].freq_idx; // reference frequency index
tidx = q->refs[i].time_idx; // reference time index
slot_symbols[SAMPLE_IDX(q->nof_prb, tidx, fidx)] = q->refs[i].simbol;
}
return LIBLTE_SUCCESS;
} else {
return LIBLTE_ERROR_INVALID_INPUTS;
}
}
/** Initializes refsignal_t object according to 3GPP 36.211 6.10.1
*
*/
int refsignal_init_LTEDL(refsignal_t *q, int port_id, int nslot,
int cell_id, lte_cp_t cp, int nof_prb) {
int refsignal_init_LTEDL(refsignal_t *q, uint8_t port_id, uint8_t nslot,
lte_cell_t cell) {
unsigned int c_init;
int ns, l, lp[2];
uint32_t c_init;
uint8_t ns, l, lp[2];
int N_cp;
int i;
int ret = -1;
int ret = LIBLTE_ERROR_INVALID_INPUTS;
sequence_t seq;
int v;
int mp;
int nof_refs_x_symbol, nof_ref_symbols;
uint8_t nof_refs_x_symbol, nof_ref_symbols;
bzero(q, sizeof(refsignal_t));
bzero(&seq, sizeof(sequence_t));
if (q != NULL &&
port_id < MAX_PORTS &&
nslot < NSLOTS_X_FRAME &&
lte_cell_isvalid(&cell))
{
if (CP_ISNORM(cp)) {
N_cp = 1;
} else {
N_cp = 0;
}
bzero(q, sizeof(refsignal_t));
bzero(&seq, sizeof(sequence_t));
if (port_id < 0 || port_id > (MAX_PORTS - 1)) {
fprintf(stderr, "Invalid port id %d\n", port_id);
return -1;
}
if (CP_ISNORM(cell.cp)) {
N_cp = 1;
} else {
N_cp = 0;
}
if (port_id < 2) {
nof_ref_symbols = 2;
lp[0] = 0;
lp[1] = CP_NSYMB(cp) - 3;
} else {
nof_ref_symbols = 1;
lp[0] = 1;
}
nof_refs_x_symbol = 2 * nof_prb;
q->nof_refs = nof_refs_x_symbol * nof_ref_symbols;
q->nsymbols = nof_ref_symbols;
q->symbols_ref = malloc(sizeof(int) * nof_ref_symbols);
q->voffset = cell_id%6;
q->nof_prb = nof_prb;
if (!q->symbols_ref) {
return -1;
}
if (port_id < 2) {
nof_ref_symbols = 2;
lp[0] = 0;
lp[1] = CP_NSYMB(cell.cp) - 3;
} else {
nof_ref_symbols = 1;
lp[0] = 1;
}
nof_refs_x_symbol = 2 * cell.nof_prb;
memcpy(q->symbols_ref, lp, sizeof(int) * nof_ref_symbols);
q->nof_refs = nof_refs_x_symbol * nof_ref_symbols;
q->nsymbols = nof_ref_symbols;
q->voffset = cell.id%6;
q->nof_prb = cell.nof_prb;
q->refs = vec_malloc(q->nof_refs * sizeof(ref_t));
if (!q->refs) {
goto free_and_exit;
}
q->ch_est = vec_malloc(q->nof_refs * sizeof(cf_t));
if (!q->ch_est) {
goto free_and_exit;
}
q->symbols_ref = malloc(sizeof(uint8_t) * nof_ref_symbols);
if (!q->symbols_ref) {
perror("malloc");
goto free_and_exit;
}
ns = nslot;
for (l = 0; l < nof_ref_symbols; l++) {
memcpy(q->symbols_ref, lp, sizeof(uint8_t) * nof_ref_symbols);
c_init = 1024 * (7 * (ns + 1) + lp[l] + 1) * (2 * cell_id + 1)
+ 2 * cell_id + N_cp;
if (sequence_LTEPRS(&seq, 2 * 2 * MAX_PRB, c_init)) {
q->refs = vec_malloc(q->nof_refs * sizeof(ref_t));
if (!q->refs) {
goto free_and_exit;
}
q->ch_est = vec_malloc(q->nof_refs * sizeof(cf_t));
if (!q->ch_est) {
goto free_and_exit;
}
ns = nslot;
for (l = 0; l < nof_ref_symbols; l++) {
c_init = 1024 * (7 * (ns + 1) + lp[l] + 1) * (2 * cell.id + 1)
+ 2 * cell.id + N_cp;
ret = sequence_LTEPRS(&seq, 2 * 2 * MAX_PRB, c_init);
if (ret != LIBLTE_SUCCESS) {
goto free_and_exit;
}
v = refsignal_v(port_id, ns, lp[l]);
v = refsignal_v(port_id, ns, lp[l]);
for (i = 0; i < nof_refs_x_symbol; i++) {
mp = i + MAX_PRB - nof_prb;
for (i = 0; i < nof_refs_x_symbol; i++) {
mp = i + MAX_PRB - cell.nof_prb;
/* generate signal */
__real__ q->refs[idx(l,i)].simbol = (1 - 2 * (float) seq.c[2 * mp]) / sqrt(2);
__imag__ q->refs[idx(l,i)].simbol = (1 - 2 * (float) seq.c[2 * mp + 1]) / sqrt(2);
/* generate signal */
__real__ q->refs[idx(l,i)].simbol = (1 - 2 * (float) seq.c[2 * mp]) / sqrt(2);
__imag__ q->refs[idx(l,i)].simbol = (1 - 2 * (float) seq.c[2 * mp + 1]) / sqrt(2);
/* mapping to resource elements */
q->refs[idx(l,i)].freq_idx = refsignal_k(i, v, cell_id);
q->refs[idx(l,i)].time_idx = lp[l];
/* mapping to resource elements */
q->refs[idx(l,i)].freq_idx = refsignal_k(i, v, cell.id);
q->refs[idx(l,i)].time_idx = lp[l];
}
}
ret = LIBLTE_SUCCESS;
}
ret = 0;
free_and_exit:
sequence_free(&seq);
if (ret == -1) {
if (ret != LIBLTE_ERROR_INVALID_INPUTS) {
sequence_free(&seq);
}
if (ret == LIBLTE_ERROR) {
refsignal_free(q);
}
return ret;

56
lte/phy/lib/ch_estimation/test/chest_test.c
Unescape Escape View File

@ -33,19 +33,22 @@
#include "liblte/phy/phy.h"
int cell_id = -1;
int nof_prb = 6;
lte_cp_t cp = CPNORM;
lte_cell_t cell = {
6, // nof_prb
MAX_PORTS, // nof_ports
1000, // cell_id
CPNORM // cyclic prefix
};
char *output_matlab = NULL;
void usage(char *prog) {
printf("Usage: %s [recov]\n", prog);
printf("\t-r nof_prb [Default %d]\n", nof_prb);
printf("\t-r nof_prb [Default %d]\n", cell.nof_prb);
printf("\t-e extended cyclic prefix [Default normal]\n");
printf("\t-c cell_id (-1 tests all). [Default %d]\n", cell_id);
printf("\t-c cell_id (1000 tests all). [Default %d]\n", cell.id);
printf("\t-o output matlab file [Default %s]\n",output_matlab?output_matlab:"None");
printf("\t-v increase verbosity\n");
@ -56,13 +59,13 @@ void parse_args(int argc, char **argv) {
while ((opt = getopt(argc, argv, "recov")) != -1) {
switch(opt) {
case 'r':
nof_prb = atoi(argv[optind]);
cell.nof_prb = atoi(argv[optind]);
break;
case 'e':
cp = CPEXT;
cell.cp = CPEXT;
break;
case 'c':
cell_id = atoi(argv[optind]);
cell.id = atoi(argv[optind]);
break;
case 'o':
output_matlab = argv[optind];
@ -120,6 +123,7 @@ int main(int argc, char **argv) {
int max_cid;
FILE *fmatlab = NULL;
float mse_mag, mse_phase;
lte_cell_t cell;
parse_args(argc,argv);
@ -131,7 +135,7 @@ int main(int argc, char **argv) {
}
}
num_re = nof_prb * RE_X_RB * CP_NSYMB(cp);
num_re = cell.nof_prb * RE_X_RB * CP_NSYMB(cell.cp);
input = malloc(num_re * sizeof(cf_t));
if (!input) {
@ -149,31 +153,23 @@ int main(int argc, char **argv) {
goto do_exit;
}
if (cell_id == -1) {
if (cell.id == 1000) {
cid = 0;
max_cid = 504;
} else {
cid = cell_id;
max_cid = cell_id;
cid = cell.id;
max_cid = cell.id;
}
while(cid <= max_cid) {
if (chest_init(&eq, LINEAR, cp, nof_prb, MAX_PORTS)) {
cell.id = cid;
if (chest_init_LTEDL(&eq, LINEAR, cell)) {
fprintf(stderr, "Error initializing equalizer\n");
goto do_exit;
}
if (chest_ref_LTEDL(&eq, cid)) {
fprintf(stderr, "Error initializing reference signal\n");
goto do_exit;
}
for (n_slot=0;n_slot<NSLOTS_X_FRAME;n_slot++) {
for (n_port=0;n_port<MAX_PORTS;n_port++) {
if (refsignal_init_LTEDL(&refs, n_port, n_slot, cid, cp, nof_prb)) {
fprintf(stderr, "Error initiating CRS slot=%d\n", i);
return -1;
}
for (n_port=0;n_port<cell.nof_ports;n_port++) {
bzero(input, sizeof(cf_t) * num_re);
for (i=0;i<num_re;i++) {
@ -185,13 +181,11 @@ int main(int argc, char **argv) {
refsignal_put(&refs, input);
refsignal_free(&refs);
for (i=0;i<CP_NSYMB(cp);i++) {
for (j=0;j<nof_prb * RE_X_RB;j++) {
float x = -1+(float) i/CP_NSYMB(cp) + cosf(2 * M_PI * (float) j/nof_prb/RE_X_RB);
h[i*nof_prb * RE_X_RB+j] = (3+x) * cexpf(I * x);
input[i*nof_prb * RE_X_RB+j] *= h[i*nof_prb * RE_X_RB+j];
for (i=0;i<CP_NSYMB(cell.cp);i++) {
for (j=0;j<cell.nof_prb * RE_X_RB;j++) {
float x = -1+(float) i/CP_NSYMB(cell.cp) + cosf(2 * M_PI * (float) j/cell.nof_prb/RE_X_RB);
h[i*cell.nof_prb * RE_X_RB+j] = (3+x) * cexpf(I * x);
input[i*cell.nof_prb * RE_X_RB+j] *= h[i*cell.nof_prb * RE_X_RB+j];
}
}

15
lte/phy/lib/common/src/phy_common.c
Unescape Escape View File

@ -50,6 +50,21 @@ const int tc_cb_sizes[NOF_TC_CB_SIZES] = { 40, 48, 56, 64, 72, 80, 88, 96, 104,
4800, 4864, 4928, 4992, 5056, 5120, 5184, 5248, 5312, 5376, 5440, 5504,
5568, 5632, 5696, 5760, 5824, 5888, 5952, 6016, 6080, 6144 };
/* Returns true if the structure pointed by cell has valid parameters
*/
bool lte_cell_isvalid(lte_cell_t *cell) {
if (cell->id < 504 &&
cell->nof_ports > 0 &&
cell->nof_ports < 5 &&
cell->nof_prb > 5 &&
cell->nof_prb < 111
) {
return true;
} else {
return false;
}
}
/*
* Returns Turbo coder interleaver size for Table 5.1.3-3 (36.212) index
*/

21
lte/phy/lib/common/src/sequence.c
Unescape Escape View File

@ -41,17 +41,16 @@
* It follows the 3GPP Release 8 (LTE) 36.211
* Section 7.2
*/
void generate_prs_c(sequence_t *q, unsigned int seed) {
void generate_prs_c(sequence_t *q, uint32_t seed) {
int n;
unsigned int *x1;
unsigned int *x2;
uint32_t *x1, *x2;
x1 = calloc(Nc + q->len + 31, sizeof(unsigned int));
x1 = calloc(Nc + q->len + 31, sizeof(uint32_t));
if (!x1) {
perror("calloc");
return;
}
x2 = calloc(Nc + q->len + 31, sizeof(unsigned int));
x2 = calloc(Nc + q->len + 31, sizeof(uint32_t));
if (!x2) {
free(x1);
perror("calloc");
@ -76,26 +75,26 @@ void generate_prs_c(sequence_t *q, unsigned int seed) {
free(x2);
}
int sequence_LTEPRS(sequence_t *q, int len, int seed) {
int sequence_LTEPRS(sequence_t *q, uint32_t len, uint32_t seed) {
if (sequence_init(q, len)) {
return -1;
return LIBLTE_ERROR;
}
q->len = len;
generate_prs_c(q, seed);
return 0;
return LIBLTE_SUCCESS;
}
int sequence_init(sequence_t *q, int len) {
int sequence_init(sequence_t *q, uint32_t len) {
if (q->c && (q->len != len)) {
free(q->c);
}
if (!q->c) {
q->c = malloc(len * sizeof(char));
if (!q->c) {
return -1;
return LIBLTE_ERROR;
}
}
return 0;
return LIBLTE_SUCCESS;
}
void sequence_free(sequence_t *q) {

132
lte/phy/lib/phch/src/dci.c
Unescape Escape View File

@ -40,15 +40,15 @@
#include "liblte/phy/utils/vector.h"
#include "liblte/phy/utils/debug.h"
int dci_init(dci_t *q, int max_dcis) {
int dci_init(dci_t *q, uint8_t max_dcis) {
q->msg = calloc(sizeof(dci_msg_t), max_dcis);
if (!q->msg) {
perror("malloc");
return -1;
return LIBLTE_ERROR;
}
q->nof_dcis = 0;
q->max_dcis = max_dcis;
return 0;
return LIBLTE_SUCCESS;
}
void dci_free(dci_t *q) {
@ -62,30 +62,30 @@ void dci_candidate_fprint(FILE *f, dci_candidate_t *q) {
q->nof_bits);
}
int dci_msg_candidate_set(dci_msg_t *msg, int L, int nCCE, unsigned short rnti) {
int dci_msg_candidate_set(dci_msg_t *msg, uint8_t L, uint8_t nCCE, uint16_t rnti) {
if (L >= 0 && L <= 3) {
msg->location.L = (unsigned char) L;
msg->location.L = L;
} else {
fprintf(stderr, "Invalid L %d\n", L);
return -1;
return LIBLTE_ERROR;
}
if (nCCE >= 0 && nCCE <= 87) {
msg->location.ncce = (unsigned char) nCCE;
msg->location.ncce = nCCE;
} else {
fprintf(stderr, "Invalid nCCE %d\n", nCCE);
return -1;
return LIBLTE_ERROR;
}
msg->location.rnti = rnti;
return 0;
return LIBLTE_SUCCESS;
}
int riv_nbits(int nof_prb) {
return (int) ceilf(log2f((float) nof_prb * ((float) nof_prb + 1) / 2));
uint8_t riv_nbits(uint8_t nof_prb) {
return (uint8_t) ceilf(log2f((float) nof_prb * ((float) nof_prb + 1) / 2));
}
const int ambiguous_sizes[10] = { 12, 14, 16, 20, 24, 26, 32, 40, 44, 56 };
bool is_ambiguous_size(int size) {
bool is_ambiguous_size(uint8_t size) {
int i;
for (i = 0; i < 10; i++) {
if (size == ambiguous_sizes[i]) {
@ -98,12 +98,12 @@ bool is_ambiguous_size(int size) {
/**********************************
* PAYLOAD sizeof functions
* ********************************/
int dci_format0_sizeof_(int nof_prb) {
uint8_t dci_format0_sizeof_(uint8_t nof_prb) {
return 1 + 1 + riv_nbits(nof_prb) + 5 + 1 + 2 + 3 + 1;
}
int dci_format1A_sizeof(int nof_prb) {
int n;
uint8_t dci_format1A_sizeof(uint8_t nof_prb) {
uint8_t n;
n = 1 + 1 + riv_nbits(nof_prb) + 5 + 3 + 1 + 2 + 2;
while (n < dci_format0_sizeof_(nof_prb)) {
n++;
@ -114,7 +114,7 @@ int dci_format1A_sizeof(int nof_prb) {
return n;
}
int dci_format0_sizeof(int nof_prb) {
uint8_t dci_format0_sizeof(uint8_t nof_prb) {
int n = dci_format0_sizeof_(nof_prb);
while (n < dci_format1A_sizeof(nof_prb)) {
n++;
@ -122,9 +122,9 @@ int dci_format0_sizeof(int nof_prb) {
return n;
}
int dci_format1_sizeof(int nof_prb) {
uint8_t dci_format1_sizeof(uint8_t nof_prb) {
int n = (int) ceilf((float) nof_prb / ra_type0_P(nof_prb)) + 5 + 3 + 1 + 2
uint8_t n = (uint8_t) ceilf((float) nof_prb / ra_type0_P(nof_prb)) + 5 + 3 + 1 + 2
+ 2;
if (nof_prb > 10) {
n++;
@ -136,17 +136,17 @@ int dci_format1_sizeof(int nof_prb) {
return n;
}
int dci_format1C_sizeof(int nof_prb) {
uint8_t dci_format1C_sizeof(uint8_t nof_prb) {
int n_vrb_dl_gap1 = ra_type2_n_vrb_dl(nof_prb, true);
int n_step = ra_type2_n_rb_step(nof_prb);
int n = +riv_nbits((int) n_vrb_dl_gap1 / n_step) + 5;
uint8_t n = +riv_nbits((uint8_t) n_vrb_dl_gap1 / n_step) + 5;
if (nof_prb >= 50) {
n++;
}
return n;
}
int dci_format_sizeof(dci_format_t format, int nof_prb) {
uint8_t dci_format_sizeof(dci_format_t format, uint8_t nof_prb) {
switch (format) {
case Format0:
return dci_format0_sizeof(nof_prb);
@ -157,7 +157,7 @@ int dci_format_sizeof(dci_format_t format, int nof_prb) {
case Format1C:
return dci_format1C_sizeof(nof_prb);
default:
return -1;
return LIBLTE_ERROR;
}
}
@ -170,7 +170,7 @@ int dci_format_sizeof(dci_format_t format, int nof_prb) {
*
* TODO: TPC and cyclic shift for DM RS not implemented
*/
int dci_format0_pack(ra_pusch_t *data, dci_msg_t *msg, int nof_prb) {
int dci_format0_pack(ra_pusch_t *data, dci_msg_t *msg, uint8_t nof_prb) {
/* pack bits */
char *y = msg->data;
@ -246,14 +246,14 @@ int dci_format0_pack(ra_pusch_t *data, dci_msg_t *msg, int nof_prb) {
*y++ = 0;
}
msg->location.nof_bits = (y - msg->data);
return 0;
return LIBLTE_SUCCESS;
}
/* Unpacks DCI format 0 data and store result in msg according
* to 36.212 5.3.3.1.1
*
* TODO: TPC and cyclic shift for DM RS not implemented
*/
int dci_format0_unpack(dci_msg_t *msg, ra_pusch_t *data, int nof_prb) {
int dci_format0_unpack(dci_msg_t *msg, ra_pusch_t *data, uint8_t nof_prb) {
/* pack bits */
char *y = msg->data;
@ -262,12 +262,12 @@ int dci_format0_unpack(dci_msg_t *msg, ra_pusch_t *data, int nof_prb) {
/* Make sure it's a Format0 message */
if (msg->location.nof_bits != dci_format_sizeof(Format0, nof_prb)) {
fprintf(stderr, "Invalid message length for format 0\n");
return -1;
return LIBLTE_ERROR;
}
if (*y++ != 0) {
fprintf(stderr,
"Invalid format differentiation field value. This is Format1A\n");
return -1;
return LIBLTE_ERROR;
}
if (*y++ == 0) {
data->freq_hop_fl = hop_disabled;
@ -317,7 +317,7 @@ int dci_format0_unpack(dci_msg_t *msg, ra_pusch_t *data, int nof_prb) {
data->rv_idx = mcs - 28;
}
return 0;
return LIBLTE_SUCCESS;
}
/* Packs DCI format 1 data to a sequence of bits and store them in msg according
@ -326,7 +326,7 @@ int dci_format0_unpack(dci_msg_t *msg, ra_pusch_t *data, int nof_prb) {
* TODO: TPC commands
*/
int dci_format1_pack(ra_pdsch_t *data, dci_msg_t *msg, int nof_prb) {
int dci_format1_pack(ra_pdsch_t *data, dci_msg_t *msg, uint8_t nof_prb) {
/* pack bits */
char *y = msg->data;
@ -351,7 +351,7 @@ int dci_format1_pack(ra_pdsch_t *data, dci_msg_t *msg, int nof_prb) {
default:
fprintf(stderr,
"Format 1 accepts type0 or type1 resource allocation only\n");
return -1;
return LIBLTE_ERROR;
}
/* pack MCS according to 7.1.7 of 36.213 */
@ -387,10 +387,10 @@ int dci_format1_pack(ra_pdsch_t *data, dci_msg_t *msg, int nof_prb) {
}
msg->location.nof_bits = (y - msg->data);
return 0;
return LIBLTE_SUCCESS;
}
int dci_format1_unpack(dci_msg_t *msg, ra_pdsch_t *data, int nof_prb) {
int dci_format1_unpack(dci_msg_t *msg, ra_pdsch_t *data, uint8_t nof_prb) {
/* pack bits */
char *y = msg->data;
@ -398,7 +398,7 @@ int dci_format1_unpack(dci_msg_t *msg, ra_pdsch_t *data, int nof_prb) {
/* Make sure it's a Format1 message */
if (msg->location.nof_bits != dci_format_sizeof(Format1, nof_prb)) {
fprintf(stderr, "Invalid message length for format 1\n");
return -1;
return LIBLTE_ERROR;
}
if (nof_prb > 10) {
@ -408,7 +408,7 @@ int dci_format1_unpack(dci_msg_t *msg, ra_pdsch_t *data, int nof_prb) {
}
/* Resource allocation: type0 or type 1 */
int P = ra_type0_P(nof_prb);
uint8_t P = ra_type0_P(nof_prb);
int alloc_size = (int) ceilf((float) nof_prb / P);
switch (data->alloc_type) {
case alloc_type0:
@ -423,7 +423,7 @@ int dci_format1_unpack(dci_msg_t *msg, ra_pdsch_t *data, int nof_prb) {
default:
fprintf(stderr,
"Format 1 accepts type0 or type1 resource allocation only\n");
return -1;
return LIBLTE_ERROR;
}
/* unpack MCS according to 7.1.7 of 36.213 */
@ -442,14 +442,14 @@ int dci_format1_unpack(dci_msg_t *msg, ra_pdsch_t *data, int nof_prb) {
// TPC not implemented
return 0;
return LIBLTE_SUCCESS;
}
/* Packs DCI format 1A for compact scheduling of PDSCH words according to 36.212 5.3.3.1.3
*
* TODO: RA procedure initiated by PDCCH, TPC commands
*/
int dci_format1As_pack(ra_pdsch_t *data, dci_msg_t *msg, int nof_prb,
int dci_format1As_pack(ra_pdsch_t *data, dci_msg_t *msg, uint8_t nof_prb,
bool crc_is_crnti) {
/* pack bits */
@ -459,7 +459,7 @@ int dci_format1As_pack(ra_pdsch_t *data, dci_msg_t *msg, int nof_prb,
if (data->alloc_type != alloc_type2) {
fprintf(stderr, "Format 1A accepts type2 resource allocation only\n");
return -1;
return LIBLTE_ERROR;
}
*y++ = data->type2_alloc.mode; // localized or distributed VRB assignment
@ -468,7 +468,7 @@ int dci_format1As_pack(ra_pdsch_t *data, dci_msg_t *msg, int nof_prb,
if (data->type2_alloc.L_crb > nof_prb) {
fprintf(stderr, "L_CRB=%d can not exceed system BW for localized type2\n",
data->type2_alloc.L_crb);
return -1;
return LIBLTE_ERROR;
}
} else {
int n_vrb_dl;
@ -481,7 +481,7 @@ int dci_format1As_pack(ra_pdsch_t *data, dci_msg_t *msg, int nof_prb,
fprintf(stderr,
"L_CRB=%d can not exceed N_vrb_dl=%d for distributed type2\n",
data->type2_alloc.L_crb, n_vrb_dl);
return -1;
return LIBLTE_ERROR;
}
}
/* pack RIV according to 7.1.6.3 of 36.213 */
@ -545,13 +545,13 @@ int dci_format1As_pack(ra_pdsch_t *data, dci_msg_t *msg, int nof_prb,
}
msg->location.nof_bits = (y - msg->data);
return 0;
return LIBLTE_SUCCESS;
}
/* Unpacks DCI format 1A for compact scheduling of PDSCH words according to 36.212 5.3.3.1.3
*
*/
int dci_format1As_unpack(dci_msg_t *msg, ra_pdsch_t *data, int nof_prb,
int dci_format1As_unpack(dci_msg_t *msg, ra_pdsch_t *data, uint8_t nof_prb,
bool crc_is_crnti) {
/* pack bits */
@ -560,13 +560,13 @@ int dci_format1As_unpack(dci_msg_t *msg, ra_pdsch_t *data, int nof_prb,
/* Make sure it's a Format0 message */
if (msg->location.nof_bits != dci_format_sizeof(Format1A, nof_prb)) {
fprintf(stderr, "Invalid message length for format 1A\n");
return -1;
return LIBLTE_ERROR;
}
if (*y++ != 1) {
fprintf(stderr,
"Invalid format differentiation field value. This is Format0\n");
return -1;
return LIBLTE_ERROR;
}
data->alloc_type = alloc_type2;
@ -624,13 +624,13 @@ int dci_format1As_unpack(dci_msg_t *msg, ra_pdsch_t *data, int nof_prb,
data->mcs.tbs = ra_tbs_from_idx(data->mcs.tbs_idx, n_prb);
data->mcs.mod = QPSK;
return 0;
return LIBLTE_SUCCESS;
}
/* Format 1C for compact scheduling of PDSCH words
*
*/
int dci_format1Cs_pack(ra_pdsch_t *data, dci_msg_t *msg, int nof_prb) {
int dci_format1Cs_pack(ra_pdsch_t *data, dci_msg_t *msg, uint8_t nof_prb) {
/* pack bits */
char *y = msg->data;
@ -638,7 +638,7 @@ int dci_format1Cs_pack(ra_pdsch_t *data, dci_msg_t *msg, int nof_prb) {
if (data->alloc_type != alloc_type2 || data->type2_alloc.mode != t2_dist) {
fprintf(stderr,
"Format 1C accepts distributed type2 resource allocation only\n");
return -1;
return LIBLTE_ERROR;
}
if (nof_prb >= 50) {
@ -651,15 +651,15 @@ int dci_format1Cs_pack(ra_pdsch_t *data, dci_msg_t *msg, int nof_prb) {
fprintf(stderr,
"L_CRB=%d can not exceed N_vrb_dl=%d for distributed type2\n",
data->type2_alloc.L_crb, ((int) n_vrb_dl / n_step) * n_step);
return -1;
return LIBLTE_ERROR;
}
if (data->type2_alloc.L_crb % n_step) {
fprintf(stderr, "L_crb must be multiple of n_step\n");
return -1;
return LIBLTE_ERROR;
}
if (data->type2_alloc.RB_start % n_step) {
fprintf(stderr, "RB_start must be multiple of n_step\n");
return -1;
return LIBLTE_ERROR;
}
int L_p = data->type2_alloc.L_crb / n_step;
int RB_p = data->type2_alloc.RB_start / n_step;
@ -687,10 +687,10 @@ int dci_format1Cs_pack(ra_pdsch_t *data, dci_msg_t *msg, int nof_prb) {
msg->location.nof_bits = (y - msg->data);
return 0;
return LIBLTE_SUCCESS;
}
int dci_format1Cs_unpack(dci_msg_t *msg, ra_pdsch_t *data, int nof_prb) {
int dci_format1Cs_unpack(dci_msg_t *msg, ra_pdsch_t *data, uint8_t nof_prb) {
uint16_t L_p, RB_p;
/* pack bits */
@ -698,7 +698,7 @@ int dci_format1Cs_unpack(dci_msg_t *msg, ra_pdsch_t *data, int nof_prb) {
if (msg->location.nof_bits != dci_format_sizeof(Format1C, nof_prb)) {
fprintf(stderr, "Invalid message length for format 1C\n");
return -1;
return LIBLTE_ERROR;
}
data->alloc_type = alloc_type2;
data->type2_alloc.mode = t2_dist;
@ -723,11 +723,11 @@ int dci_format1Cs_unpack(dci_msg_t *msg, ra_pdsch_t *data, int nof_prb) {
msg->location.nof_bits = (y - msg->data);
return 0;
return LIBLTE_SUCCESS;
}
int dci_msg_pack_pdsch(ra_pdsch_t *data, dci_msg_t *msg, dci_format_t format,
int nof_prb, bool crc_is_crnti) {
uint8_t nof_prb, bool crc_is_crnti) {
switch (format) {
case Format1:
return dci_format1_pack(data, msg, nof_prb);
@ -738,11 +738,11 @@ int dci_msg_pack_pdsch(ra_pdsch_t *data, dci_msg_t *msg, dci_format_t format,
default:
fprintf(stderr, "Invalid DCI format %s for PDSCH resource allocation\n",
dci_format_string(format));
return -1;
return LIBLTE_ERROR;
}
}
int dci_msg_unpack_pdsch(dci_msg_t *msg, ra_pdsch_t *data, int nof_prb,
int dci_msg_unpack_pdsch(dci_msg_t *msg, ra_pdsch_t *data, uint8_t nof_prb,
bool crc_is_crnti) {
if (msg->location.nof_bits == dci_format_sizeof(Format1, nof_prb)) {
return dci_format1_unpack(msg, data, nof_prb);
@ -751,15 +751,15 @@ int dci_msg_unpack_pdsch(dci_msg_t *msg, ra_pdsch_t *data, int nof_prb,
} else if (msg->location.nof_bits == dci_format_sizeof(Format1C, nof_prb)) {
return dci_format1Cs_unpack(msg, data, nof_prb);
} else {
return -1;
return LIBLTE_ERROR;
}
}
int dci_msg_pack_pusch(ra_pusch_t *data, dci_msg_t *msg, int nof_prb) {
int dci_msg_pack_pusch(ra_pusch_t *data, dci_msg_t *msg, uint8_t nof_prb) {
return dci_format0_pack(data, msg, nof_prb);
}
int dci_msg_unpack_pusch(dci_msg_t *msg, ra_pusch_t *data, int nof_prb) {
int dci_msg_unpack_pusch(dci_msg_t *msg, ra_pusch_t *data, uint8_t nof_prb) {
return dci_format0_unpack(msg, data, nof_prb);
}
@ -799,17 +799,17 @@ void dci_msg_type_fprint(FILE *f, dci_msg_type_t type) {
}
}
int dci_msg_get_type(dci_msg_t *msg, dci_msg_type_t *type, int nof_prb,
int dci_msg_get_type(dci_msg_t *msg, dci_msg_type_t *type, uint8_t nof_prb,
unsigned short crnti) {
if (msg->location.nof_bits == dci_format_sizeof(Format0, nof_prb)
&& !msg->data[0]) {
type->type = PUSCH_SCHED;
type->format = Format0;
return 0;
return LIBLTE_SUCCESS;
} else if (msg->location.nof_bits == dci_format_sizeof(Format1, nof_prb)) {
type->type = PDSCH_SCHED; // only these 2 types supported
type->format = Format1;
return 0;
return LIBLTE_SUCCESS;
} else if (msg->location.nof_bits == dci_format_sizeof(Format1A, nof_prb)) {
if (msg->location.rnti == crnti) {
type->type = RA_PROC_PDCCH;
@ -818,7 +818,7 @@ int dci_msg_get_type(dci_msg_t *msg, dci_msg_type_t *type, int nof_prb,
type->type = PDSCH_SCHED; // only these 2 types supported
type->format = Format1A;
}
return 0;
return LIBLTE_SUCCESS;
} else if (msg->location.nof_bits == dci_format_sizeof(Format1C, nof_prb)) {
if (msg->location.rnti == MRNTI) {
type->type = MCCH_CHANGE;
@ -827,8 +827,8 @@ int dci_msg_get_type(dci_msg_t *msg, dci_msg_type_t *type, int nof_prb,
type->type = PDSCH_SCHED; // only these 2 types supported
type->format = Format1C;
}
return 0;
return LIBLTE_SUCCESS;
}
return -1;
return LIBLTE_ERROR;
}

240
lte/phy/lib/phch/src/pcfich.c
Unescape Escape View File

@ -54,37 +54,42 @@ bool pcfich_exists(int nframe, int nslot) {
return true;
}
/** Initializes the pcfich channel receiver */
int pcfich_init(pcfich_t *q, regs_t *regs, int cell_id, int nof_prb,
int nof_ports, lte_cp_t cp) {
int ret = -1;
if (cell_id < 0) {
return -1;
}
bzero(q, sizeof(pcfich_t));
q->cell_id = cell_id;
q->cp = cp;
q->regs = regs;
q->nof_prb = nof_prb;
q->nof_ports = nof_ports;
if (modem_table_std(&q->mod, LTE_QPSK, false)) {
goto clean;
}
/** Initializes the pcfich channel receiver.
* On error, returns -1 and frees the structrure
*/
int pcfich_init(pcfich_t *q, regs_t *regs, lte_cell_t cell) {
int ret = LIBLTE_ERROR_INVALID_INPUTS;
demod_hard_init(&q->demod);
demod_hard_table_set(&q->demod, LTE_QPSK);
if (q != NULL &&
regs != NULL &&
lte_cell_isvalid(&cell))
{
ret = LIBLTE_ERROR;
for (int nsf = 0; nsf < NSUBFRAMES_X_FRAME; nsf++) {
if (sequence_pcfich(&q->seq_pcfich[nsf], 2 * nsf, q->cell_id)) {
bzero(q, sizeof(pcfich_t));
q->cell = cell;
q->regs = regs;
if (modem_table_std(&q->mod, LTE_QPSK, false)) {
goto clean;
}
}
q->nof_symbols = PCFICH_RE;
demod_hard_init(&q->demod);
demod_hard_table_set(&q->demod, LTE_QPSK);
ret = 0;
clean: if (ret == -1) {
for (int nsf = 0; nsf < NSUBFRAMES_X_FRAME; nsf++) {
if (sequence_pcfich(&q->seq_pcfich[nsf], 2 * nsf, q->cell.id)) {
goto clean;
}
}
q->nof_symbols = PCFICH_RE;
ret = LIBLTE_SUCCESS;
}
clean:
if (ret == LIBLTE_ERROR) {
pcfich_free(q);
}
return ret;
@ -100,7 +105,7 @@ void pcfich_free(pcfich_t *q) {
/** Finds the CFI with minimum distance with the vector of received 32 bits.
* Saves the CFI value in the cfi pointer and returns the distance.
*/
int pcfich_cfi_decode(char bits[PCFICH_CFI_LEN], int *cfi) {
int pcfich_cfi_decode(char bits[PCFICH_CFI_LEN], uint8_t *cfi) {
int i, j;
int distance, index = -1;
int min = 32;
@ -120,7 +125,6 @@ int pcfich_cfi_decode(char bits[PCFICH_CFI_LEN], int *cfi) {
*cfi = index + 1;
}
return min;
}
/** Encodes the CFI producing a vector of 32 bits.
@ -128,11 +132,11 @@ int pcfich_cfi_decode(char bits[PCFICH_CFI_LEN], int *cfi) {
*/
int pcfich_cfi_encode(int cfi, char bits[PCFICH_CFI_LEN]) {
if (cfi < 1 || cfi > 3) {
fprintf(stderr, "Invalid CFI %d\n", cfi);
return -1;
return LIBLTE_ERROR_INVALID_INPUTS;
} else{
memcpy(bits, cfi_table[cfi - 1], PCFICH_CFI_LEN * sizeof(char));
return LIBLTE_SUCCESS;
}
memcpy(bits, cfi_table[cfi - 1], PCFICH_CFI_LEN * sizeof(char));
return 0;
}
/* Decodes the PCFICH channel and saves the CFI in the cfi pointer.
@ -140,7 +144,7 @@ int pcfich_cfi_encode(int cfi, char bits[PCFICH_CFI_LEN]) {
* Returns 1 if successfully decoded the CFI, 0 if not and -1 on error
*/
int pcfich_decode(pcfich_t *q, cf_t *slot_symbols, cf_t *ce[MAX_PORTS],
int nsubframe, int *cfi, int *distance) {
uint8_t nsubframe, uint8_t *cfi, uint8_t *distance) {
int dist;
/* Set pointers for layermapping & precoding */
@ -148,112 +152,120 @@ int pcfich_decode(pcfich_t *q, cf_t *slot_symbols, cf_t *ce[MAX_PORTS],
cf_t *x[MAX_LAYERS];
cf_t *ce_precoding[MAX_PORTS];
if (nsubframe < 0 || nsubframe > NSUBFRAMES_X_FRAME) {
fprintf(stderr, "Invalid nslot %d\n", nsubframe);
return -1;
}
if (q != NULL &&
slot_symbols != NULL &&
nsubframe < NSUBFRAMES_X_FRAME)
{
/* number of layers equals number of ports */
for (i = 0; i < MAX_PORTS; i++) {
x[i] = q->pcfich_x[i];
}
for (i = 0; i < MAX_PORTS; i++) {
ce_precoding[i] = q->ce[i];
}
/* extract symbols */
if (q->nof_symbols
!= regs_pcfich_get(q->regs, slot_symbols, q->pcfich_symbols[0])) {
fprintf(stderr, "There was an error getting the PCFICH symbols\n");
return -1;
}
/* number of layers equals number of ports */
for (i = 0; i < MAX_PORTS; i++) {
x[i] = q->pcfich_x[i];
}
for (i = 0; i < MAX_PORTS; i++) {
ce_precoding[i] = q->ce[i];
}
/* extract channel estimates */
for (i = 0; i < q->nof_ports; i++) {
if (q->nof_symbols != regs_pcfich_get(q->regs, ce[i], q->ce[i])) {
/* extract symbols */
if (q->nof_symbols
!= regs_pcfich_get(q->regs, slot_symbols, q->pcfich_symbols[0])) {
fprintf(stderr, "There was an error getting the PCFICH symbols\n");
return -1;
return LIBLTE_ERROR;
}
}
/* in control channels, only diversity is supported */
if (q->nof_ports == 1) {
/* no need for layer demapping */
predecoding_single_zf(q->pcfich_symbols[0], q->ce[0], q->pcfich_d,
q->nof_symbols);
} else {
predecoding_diversity_zf(q->pcfich_symbols[0], ce_precoding, x,
q->nof_ports, q->nof_symbols);
layerdemap_diversity(x, q->pcfich_d, q->nof_ports,
q->nof_symbols / q->nof_ports);
}
/* extract channel estimates */
for (i = 0; i < q->cell.nof_ports; i++) {
if (q->nof_symbols != regs_pcfich_get(q->regs, ce[i], q->ce[i])) {
fprintf(stderr, "There was an error getting the PCFICH symbols\n");
return LIBLTE_ERROR;
}
}
/* demodulate symbols */
demod_hard_demodulate(&q->demod, q->pcfich_d, q->data, q->nof_symbols);
/* in control channels, only diversity is supported */
if (q->cell.nof_ports == 1) {
/* no need for layer demapping */
predecoding_single_zf(q->pcfich_symbols[0], q->ce[0], q->pcfich_d,
q->nof_symbols);
} else {
predecoding_diversity_zf(q->pcfich_symbols[0], ce_precoding, x,
q->cell.nof_ports, q->nof_symbols);
layerdemap_diversity(x, q->pcfich_d, q->cell.nof_ports,
q->nof_symbols / q->cell.nof_ports);
}
/* Scramble with the sequence for slot nslot */
scrambling_b(&q->seq_pcfich[nsubframe], q->data);
/* demodulate symbols */
demod_hard_demodulate(&q->demod, q->pcfich_d, q->data, q->nof_symbols);
/* decode CFI */
dist = pcfich_cfi_decode(q->data, cfi);
if (distance) {
*distance = dist;
}
if (dist < PCFICH_MAX_DISTANCE) {
return 1;
/* Scramble with the sequence for slot nslot */
scrambling_b(&q->seq_pcfich[nsubframe], q->data);
/* decode CFI */
dist = pcfich_cfi_decode(q->data, cfi);
if (distance) {
*distance = dist;
}
if (dist < PCFICH_MAX_DISTANCE) {
return 1;
} else {
return 0;
}
} else {
return 0;
return LIBLTE_ERROR_INVALID_INPUTS;
}
}
/** Encodes CFI and maps symbols to the slot
*/
int pcfich_encode(pcfich_t *q, int cfi, cf_t *slot_symbols[MAX_PORTS],
int nsubframe) {
int pcfich_encode(pcfich_t *q, uint8_t cfi, cf_t *slot_symbols[MAX_PORTS],
uint8_t subframe) {
int i;
if (nsubframe < 0 || nsubframe > NSUBFRAMES_X_FRAME) {
fprintf(stderr, "Invalid nslot %d\n", nsubframe);
return -1;
}
if (q != NULL &&
cfi < 3 &&
slot_symbols != NULL &&
subframe < NSUBFRAMES_X_FRAME)
{
/* Set pointers for layermapping & precoding */
cf_t *x[MAX_LAYERS];
cf_t *symbols_precoding[MAX_PORTS];
/* Set pointers for layermapping & precoding */
cf_t *x[MAX_LAYERS];
cf_t *symbols_precoding[MAX_PORTS];
/* number of layers equals number of ports */
for (i = 0; i < q->nof_ports; i++) {
x[i] = q->pcfich_x[i];
}
for (i = 0; i < MAX_PORTS; i++) {
symbols_precoding[i] = q->pcfich_symbols[i];
}
/* number of layers equals number of ports */
for (i = 0; i < q->cell.nof_ports; i++) {
x[i] = q->pcfich_x[i];
}
for (i = 0; i < MAX_PORTS; i++) {
symbols_precoding[i] = q->pcfich_symbols[i];
}
/* pack CFI */
pcfich_cfi_encode(cfi, q->data);
/* pack CFI */
pcfich_cfi_encode(cfi, q->data);
/* scramble for slot sequence nslot */
scrambling_b(&q->seq_pcfich[nsubframe], q->data);
/* scramble for slot sequence nslot */
scrambling_b(&q->seq_pcfich[subframe], q->data);
mod_modulate(&q->mod, q->data, q->pcfich_d, PCFICH_CFI_LEN);
mod_modulate(&q->mod, q->data, q->pcfich_d, PCFICH_CFI_LEN);
/* layer mapping & precoding */
if (q->nof_ports > 1) {
layermap_diversity(q->pcfich_d, x, q->nof_ports, q->nof_symbols);
precoding_diversity(x, symbols_precoding, q->nof_ports,
q->nof_symbols / q->nof_ports);
} else {
memcpy(q->pcfich_symbols[0], q->pcfich_d, q->nof_symbols * sizeof(cf_t));
}
/* layer mapping & precoding */
if (q->cell.nof_ports > 1) {
layermap_diversity(q->pcfich_d, x, q->cell.nof_ports, q->nof_symbols);
precoding_diversity(x, symbols_precoding, q->cell.nof_ports,
q->nof_symbols / q->cell.nof_ports);
} else {
memcpy(q->pcfich_symbols[0], q->pcfich_d, q->nof_symbols * sizeof(cf_t));
}
/* mapping to resource elements */
for (i = 0; i < q->nof_ports; i++) {
if (regs_pcfich_put(q->regs, q->pcfich_symbols[i], slot_symbols[i]) < 0) {
fprintf(stderr, "Error putting PCHICH resource elements\n");
return -1;
/* mapping to resource elements */
for (i = 0; i < q->cell.nof_ports; i++) {
if (regs_pcfich_put(q->regs, q->pcfich_symbols[i], slot_symbols[i]) < 0) {
fprintf(stderr, "Error putting PCHICH resource elements\n");
return LIBLTE_ERROR;
}
}
return LIBLTE_SUCCESS;
} else {
return LIBLTE_ERROR_INVALID_INPUTS;
}
return 0;
}

632
lte/phy/lib/phch/src/pdcch.c
Unescape Escape View File

@ -31,7 +31,6 @@
#include <strings.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>
#include <math.h>
#include "liblte/phy/phch/dci.h"
@ -42,24 +41,26 @@
#include "liblte/phy/utils/vector.h"
#include "liblte/phy/utils/debug.h"
#define PDCCH_NOF_FORMATS 4
#define PDCCH_FORMAT_NOF_CCE(i) (1<<i)
#define PDCCH_FORMAT_NOF_REGS(i) ((1<<i)*9)
#define PDCCH_FORMAT_NOF_BITS(i) ((1<<i)*72)
#define PDCCH_NOF_FORMATS 4
#define PDCCH_FORMAT_NOF_CCE(i) (1<<i)
#define PDCCH_FORMAT_NOF_REGS(i) ((1<<i)*9)
#define PDCCH_FORMAT_NOF_BITS(i) ((1<<i)*72)
#define NOF_COMMON_FORMATS 2
#define NOF_COMMON_FORMATS 2
const dci_format_t common_formats[NOF_COMMON_FORMATS] = { Format1A, Format1C };
#define NOF_UE_FORMATS 2
#define NOF_UE_FORMATS 2
const dci_format_t ue_formats[NOF_UE_FORMATS] = { Format0, Format1 }; // 1A has the same payload as 0
#define MIN(a,b) ((a>b)?b:a)
void set_cfi(pdcch_t *q, uint8_t cfi);
/**
* 36.213 9.1
*/
int gen_common_search(dci_candidate_t *c, int nof_cce, int nof_bits,
unsigned short rnti) {
int gen_common_search(dci_candidate_t *c, uint16_t nof_cce, uint16_t nof_bits,
uint16_t rnti) {
int i, l, L, k;
k = 0;
for (l = 3; l > 1; l--) {
@ -80,15 +81,15 @@ int gen_common_search(dci_candidate_t *c, int nof_cce, int nof_bits,
/**
* 36.213 9.1
*/
int gen_ue_search(dci_candidate_t *c, int nof_cce, int nof_bits,
unsigned short rnti, int subframe) {
int gen_ue_search(dci_candidate_t *c, uint16_t nof_cce, uint8_t nof_bits,
uint16_t rnti, uint8_t subframe) {
int i, l, L, k, m;
unsigned int Yk;
const int S[4] = { 6, 12, 8, 16 };
k = 0;
if (!subframe) {
INFO("UE-specific candidates for RNTI: 0x%x, NofBits: %d, NofCCE: %d\n",
rnti, nof_bits, nof_cce);
if (VERBOSE_ISDEBUG()) {
printf("NofBits=%d, RNTI: 0x%x, SF=%d (n, L): ", nof_bits, rnti, subframe);
}
for (l = 3; l >= 0; l--) {
L = (1 << l);
@ -102,7 +103,12 @@ int gen_ue_search(dci_candidate_t *c, int nof_cce, int nof_bits,
}
c[k].ncce = L * ((Yk + i) % (nof_cce / L));
if (VERBOSE_ISDEBUG()) {
printf("sf %d - (%d, %d), ", subframe, c[k].ncce, c[k].L);
printf("(%d, %d), ", c[k].ncce, c[k].L);
}
if (c[k].ncce + PDCCH_FORMAT_NOF_CCE(c[k].L) > nof_cce ||
nof_bits > DCI_MAX_BITS) {
fprintf(stderr, "Illegal DCI message\n");
return LIBLTE_ERROR;
}
k++;
}
@ -113,35 +119,17 @@ int gen_ue_search(dci_candidate_t *c, int nof_cce, int nof_bits,
return k;
}
void pdcch_init_common(pdcch_t *q, pdcch_search_t *s, unsigned short rnti) {
int k, i;
dci_candidate_t *c = s->candidates[0];
s->nof_candidates = 0;
// Format 1A and 1C L=4 and L=8, 4 and 2 candidates, only if nof_cce > 16
k = 0;
for (i = 0; i < NOF_COMMON_FORMATS && k < MAX_CANDIDATES; i++) {
k += gen_common_search(&c[k], q->nof_cce,
dci_format_sizeof(common_formats[i], q->nof_prb), SIRNTI);
}
s->nof_candidates=k;
INFO("Initiated %d candidate(s) in the Common search space for RNTI: 0x%x\n",
s->nof_candidates, rnti);
}
/** 36.213 v9.3 Table 7.1-1: System Information DCI messages
* Expect DCI formats 1C and 1A in the common search space
*/
void pdcch_init_search_si(pdcch_t *q) {
pdcch_init_common(q, &q->search_mode[SEARCH_SI], SIRNTI);
q->current_search_mode = SEARCH_SI;
}
/** 36.213 v9.3 Table 7.1-5
* user-specific search space. Currently supported transmission Mode 1:
* DCI Format 1A and 1 + PUSCH scheduling format 0
*/
void pdcch_init_search_ue(pdcch_t *q, unsigned short c_rnti) {
int n, k, i;
int pdcch_init_search_ue(pdcch_t *q, uint16_t c_rnti, uint8_t cfi) {
int k, i, r;
uint8_t n;
set_cfi(q, cfi);
pdcch_search_t *s = &q->search_mode[SEARCH_UE];
for (n = 0; n < NSUBFRAMES_X_FRAME; n++) {
dci_candidate_t *c = s->candidates[n];
@ -151,22 +139,67 @@ void pdcch_init_search_ue(pdcch_t *q, unsigned short c_rnti) {
// Expect Formats 1, 1A, 0
k = 0;
for (i = 0; i < NOF_UE_FORMATS && k < MAX_CANDIDATES; i++) {
k += gen_ue_search(&c[k], q->nof_cce,
dci_format_sizeof(ue_formats[i], q->nof_prb), c_rnti, n);
r = gen_ue_search(&c[k], q->nof_cce,
dci_format_sizeof(ue_formats[i], q->cell.nof_prb), c_rnti, n);
if (r < 0) {
fprintf(stderr, "Error generating UE-specific search space\n");
return r;
}
k += r;
}
s->nof_candidates = k;
}
INFO("Initiated %d candidate(s) in the UE-specific search space for C-RNTI: 0x%x\n",
s->nof_candidates, c_rnti);
q->current_search_mode = SEARCH_UE;
return LIBLTE_SUCCESS;
}
int pdcch_init_common(pdcch_t *q, pdcch_search_t *s, uint16_t rnti) {
int k, r, i;
dci_candidate_t *c = s->candidates[0];
s->nof_candidates = 0;
// Format 1A and 1C L=4 and L=8, 4 and 2 candidates, only if nof_cce > 16
k = 0;
for (i = 0; i < NOF_COMMON_FORMATS && k < MAX_CANDIDATES; i++) {
r = gen_common_search(&c[k], q->nof_cce,
dci_format_sizeof(common_formats[i], q->cell.nof_prb), SIRNTI);
if (r < 0) {
return r;
}
k += r;
}
s->nof_candidates=k;
INFO("Initiated %d candidate(s) in the Common search space for RNTI: 0x%x\n",
s->nof_candidates, rnti);
return LIBLTE_SUCCESS;
}
/** 36.213 v9.3 Table 7.1-1: System Information DCI messages
* Expect DCI formats 1C and 1A in the common search space
*/
int pdcch_init_search_si(pdcch_t *q, uint8_t cfi) {
set_cfi(q, cfi);
int r = pdcch_init_common(q, &q->search_mode[SEARCH_SI], SIRNTI);
if (r >= 0) {
q->current_search_mode = SEARCH_SI;
}
return r;
}
/** 36.213 v9.3 Table 7.1-3
* Expect DCI formats 1C and 1A in the common search space
*/
void pdcch_init_search_ra(pdcch_t *q, unsigned short ra_rnti) {
pdcch_init_common(q, &q->search_mode[SEARCH_RA], ra_rnti);
q->current_search_mode = SEARCH_RA;
int pdcch_init_search_ra(pdcch_t *q, uint16_t ra_rnti, uint8_t cfi) {
set_cfi(q, cfi);
int r = pdcch_init_common(q, &q->search_mode[SEARCH_RA], ra_rnti);
if (r >= 0) {
q->current_search_mode = SEARCH_RA;
}
return r;
}
void pdcch_set_search_si(pdcch_t *q) {
@ -179,110 +212,94 @@ void pdcch_set_search_ra(pdcch_t *q) {
q->current_search_mode = SEARCH_RA;
}
int pdcch_set_cfi(pdcch_t *q, int cfi) {
if (cfi == -1) {
q->nof_bits = -1;
q->nof_symbols = -1;
q->nof_cce = -1;
q->nof_regs = -1;
return 0;
} else if (cfi < 4 && cfi > 0) {
void set_cfi(pdcch_t *q, uint8_t cfi) {
if (cfi > 0 && cfi < 4) {
q->nof_regs = (regs_pdcch_nregs(q->regs, cfi) / 9) * 9;
q->nof_cce = q->nof_regs / 9;
q->nof_symbols = 4 * q->nof_regs;
q->nof_bits = 2 * q->nof_symbols;
return 0;
} else {
return -1;
}
}
/** Initializes the PDCCH transmitter and receiver */
int pdcch_init(pdcch_t *q, regs_t *regs, int nof_prb, int nof_ports,
int cell_id, lte_cp_t cp) {
int ret = -1;
int pdcch_init(pdcch_t *q, regs_t *regs, lte_cell_t cell) {
int ret = LIBLTE_ERROR_INVALID_INPUTS;
int i;
if (cell_id < 0) {
return -1;
}
if (nof_ports > MAX_PORTS) {
fprintf(stderr, "Invalid number of ports %d\n", nof_ports);
return -1;
}
bzero(q, sizeof(pdcch_t));
q->cell_id = cell_id;
q->cp = cp;
q->regs = regs;
q->nof_ports = nof_ports;
q->nof_prb = nof_prb;
q->current_search_mode = SEARCH_NONE;
/* Now allocate memory for the maximum number of REGs (CFI=2), then can
* be changed at runtime
*/
pdcch_set_cfi(q, 3);
INFO("Init PDCCH: %d CCEs (%d REGs), %d bits, %d symbols, %d ports\n",
q->nof_cce, q->nof_regs, q->nof_bits, q->nof_symbols, q->nof_ports);
if (modem_table_std(&q->mod, LTE_QPSK, true)) {
goto clean;
}
if (crc_init(&q->crc, LTE_CRC16, 16)) {
goto clean;
}
demod_soft_init(&q->demod);
demod_soft_table_set(&q->demod, &q->mod);
demod_soft_alg_set(&q->demod, APPROX);
for (i = 0; i < NSUBFRAMES_X_FRAME; i++) {
if (sequence_pdcch(&q->seq_pdcch[i], 2 * i, q->cell_id, q->nof_bits)) {
if (q != NULL &&
regs != NULL &&
lte_cell_isvalid(&cell))
{
ret = LIBLTE_ERROR;
bzero(q, sizeof(pdcch_t));
q->cell = cell;
q->regs = regs;
q->current_search_mode = SEARCH_NONE;
/* Now allocate memory for the maximum number of REGs (CFI=3)
*/
set_cfi(q, 3);
q->max_bits = q->nof_bits;
INFO("Init PDCCH: %d CCEs (%d REGs), %d bits, %d symbols, %d ports\n",
q->nof_cce, q->nof_regs, q->nof_bits, q->nof_symbols, q->cell.nof_ports);
if (modem_table_std(&q->mod, LTE_QPSK, true)) {
goto clean;
}
if (crc_init(&q->crc, LTE_CRC16, 16)) {
goto clean;
}
}
int poly[3] = { 0x6D, 0x4F, 0x57 };
if (viterbi_init(&q->decoder, viterbi_37, poly, DCI_MAX_BITS + 16, true)) {
goto clean;
}
q->pdcch_e = malloc(sizeof(char) * q->nof_bits);
if (!q->pdcch_e) {
goto clean;
}
demod_soft_init(&q->demod);
demod_soft_table_set(&q->demod, &q->mod);
demod_soft_alg_set(&q->demod, APPROX);
q->pdcch_llr = malloc(sizeof(float) * q->nof_bits);
if (!q->pdcch_llr) {
goto clean;
}
for (i = 0; i < NSUBFRAMES_X_FRAME; i++) {
if (sequence_pdcch(&q->seq_pdcch[i], 2 * i, q->cell.id, q->nof_bits)) {
goto clean;
}
}
q->pdcch_d = malloc(sizeof(cf_t) * q->nof_symbols);
if (!q->pdcch_d) {
goto clean;
}
int poly[3] = { 0x6D, 0x4F, 0x57 };
if (viterbi_init(&q->decoder, viterbi_37, poly, DCI_MAX_BITS + 16, true)) {
goto clean;
}
for (i = 0; i < MAX_PORTS; i++) {
q->ce[i] = malloc(sizeof(cf_t) * q->nof_symbols);
if (!q->ce[i]) {
q->pdcch_e = malloc(sizeof(char) * q->nof_bits);
if (!q->pdcch_e) {
goto clean;
}
q->pdcch_x[i] = malloc(sizeof(cf_t) * q->nof_symbols);
if (!q->pdcch_x[i]) {
q->pdcch_llr = malloc(sizeof(float) * q->nof_bits);
if (!q->pdcch_llr) {
goto clean;
}
q->pdcch_symbols[i] = malloc(sizeof(cf_t) * q->nof_symbols);
if (!q->pdcch_symbols[i]) {
q->pdcch_d = malloc(sizeof(cf_t) * q->nof_symbols);
if (!q->pdcch_d) {
goto clean;
}
}
/* Reset CFI to make sure we return error if new CFI is not set */
pdcch_set_cfi(q, -1);
for (i = 0; i < MAX_PORTS; i++) {
q->ce[i] = malloc(sizeof(cf_t) * q->nof_symbols);
if (!q->ce[i]) {
goto clean;
}
q->pdcch_x[i] = malloc(sizeof(cf_t) * q->nof_symbols);
if (!q->pdcch_x[i]) {
goto clean;
}
q->pdcch_symbols[i] = malloc(sizeof(cf_t) * q->nof_symbols);
if (!q->pdcch_symbols[i]) {
goto clean;
}
}
ret = 0;
clean: if (ret == -1) {
ret = LIBLTE_SUCCESS;
}
clean:
if (ret == LIBLTE_ERROR) {
pdcch_free(q);
}
return ret;
@ -326,44 +343,58 @@ void pdcch_free(pdcch_t *q) {
*
* TODO: UE transmit antenna selection CRC mask
*/
unsigned short dci_decode(pdcch_t *q, float *e, char *data, int E, int nof_bits) {
int dci_decode(pdcch_t *q, float *e, char *data, uint16_t E, uint16_t nof_bits, uint16_t *crc) {
float tmp[3 * (DCI_MAX_BITS + 16)];
unsigned short p_bits, crc_res;
uint16_t p_bits, crc_res;
char *x;
assert(nof_bits < DCI_MAX_BITS);
if (q != NULL &&
data != NULL &&
E < q->max_bits &&
nof_bits < DCI_MAX_BITS)
{
/* unrate matching */
rm_conv_rx(e, E, tmp, 3 * (nof_bits + 16));
/* unrate matching */
rm_conv_rx(e, E, tmp, 3 * (nof_bits + 16));
DEBUG("Viterbi input: ", 0);
if (VERBOSE_ISDEBUG()) {
vec_fprint_f(stdout, tmp, 3 * (nof_bits + 16));
}
DEBUG("Viterbi input: ", 0);
if (VERBOSE_ISDEBUG()) {
vec_fprint_f(stdout, tmp, 3 * (nof_bits + 16));
}
/* viterbi decoder */
viterbi_decode_f(&q->decoder, tmp, data, nof_bits + 16);
/* viterbi decoder */
viterbi_decode_f(&q->decoder, tmp, data, nof_bits + 16);
if (VERBOSE_ISDEBUG()) {
bit_fprint(stdout, data, nof_bits + 16);
}
if (VERBOSE_ISDEBUG()) {
bit_fprint(stdout, data, nof_bits + 16);
}
x = &data[nof_bits];
p_bits = (unsigned short) bit_unpack(&x, 16);
crc_res = ((unsigned short) crc_checksum(&q->crc, data, nof_bits) & 0xffff);
DEBUG("p_bits: 0x%x, crc_res: 0x%x, tot: 0x%x\n", p_bits, crc_res,
p_bits ^ crc_res);
return (p_bits ^ crc_res);
x = &data[nof_bits];
p_bits = (uint16_t) bit_unpack(&x, 16);
crc_res = ((uint16_t) crc_checksum(&q->crc, data, nof_bits) & 0xffff);
DEBUG("p_bits: 0x%x, crc_res: 0x%x, tot: 0x%x\n", p_bits, crc_res,
p_bits ^ crc_res);
if (crc) {
*crc = p_bits ^ crc_res;
}
return LIBLTE_SUCCESS;
} else {
return LIBLTE_ERROR_INVALID_INPUTS;
}
}
int pdcch_decode_candidate(pdcch_t *q, float *llr, dci_candidate_t *c,
dci_msg_t *msg) {
unsigned short crc_res;
uint16_t crc_res;
INFO("Trying Candidate: Nbits: %d, E: %3d, nCCE: %d, L: %d, RNTI: 0x%x\n",
c->nof_bits, PDCCH_FORMAT_NOF_BITS(c->L), c->ncce, c->L, c->rnti);
crc_res = dci_decode(q, &llr[72 * c->ncce], msg->data,
PDCCH_FORMAT_NOF_BITS(c->L), c->nof_bits);
if (dci_decode(q, &llr[72 * c->ncce], msg->data,
PDCCH_FORMAT_NOF_BITS(c->L), c->nof_bits, &crc_res)) {
return LIBLTE_ERROR;
}
if (c->rnti == crc_res) {
memcpy(&msg->location, c, sizeof(dci_candidate_t));
@ -371,84 +402,87 @@ int pdcch_decode_candidate(pdcch_t *q, float *llr, dci_candidate_t *c,
c->nof_bits, PDCCH_FORMAT_NOF_BITS(c->L), c->ncce, c->L, c->rnti);
return 1;
}
return 0;
return LIBLTE_SUCCESS;
}
int pdcch_extract_llr(pdcch_t *q, cf_t *slot_symbols, cf_t *ce[MAX_PORTS],
float *llr, int nsubframe) {
float *llr, uint8_t nsubframe, uint8_t cfi) {
/* Set pointers for layermapping & precoding */
int i;
cf_t *x[MAX_LAYERS];
if (q->nof_bits == -1 || q->nof_cce == -1 || q->nof_regs == -1) {
fprintf(stderr, "Must call pdcch_set_cfi() first to set the CFI\n");
return -1;
}
if (nsubframe < 0 || nsubframe > NSUBFRAMES_X_FRAME) {
fprintf(stderr, "Invalid subframe %d\n", nsubframe);
return -1;
}
/* number of layers equals number of ports */
for (i = 0; i < q->nof_ports; i++) {
x[i] = q->pdcch_x[i];
}
memset(&x[q->nof_ports], 0, sizeof(cf_t*) * (MAX_LAYERS - q->nof_ports));
/* extract symbols */
int n = regs_pdcch_get(q->regs, slot_symbols, q->pdcch_symbols[0]);
if (q->nof_symbols != n) {
fprintf(stderr, "Expected %d PDCCH symbols but got %d symbols\n",
q->nof_symbols, n);
return -1;
}
if (q != NULL &&
llr != NULL &&
slot_symbols != NULL &&
nsubframe < 10 &&
cfi > 0 &&
cfi < 4)
{
set_cfi(q, cfi);
/* number of layers equals number of ports */
for (i = 0; i < q->cell.nof_ports; i++) {
x[i] = q->pdcch_x[i];
}
memset(&x[q->cell.nof_ports], 0, sizeof(cf_t*) * (MAX_LAYERS - q->cell.nof_ports));
/* extract channel estimates */
for (i = 0; i < q->nof_ports; i++) {
n = regs_pdcch_get(q->regs, ce[i], q->ce[i]);
/* extract symbols */
int n = regs_pdcch_get(q->regs, slot_symbols, q->pdcch_symbols[0]);
if (q->nof_symbols != n) {
fprintf(stderr, "Expected %d PDCCH symbols but got %d symbols\n",
q->nof_symbols, n);
return -1;
return LIBLTE_ERROR;
}
}
/* in control channels, only diversity is supported */
if (q->nof_ports == 1) {
/* no need for layer demapping */
predecoding_single_zf(q->pdcch_symbols[0], q->ce[0], q->pdcch_d,
q->nof_symbols);
} else {
predecoding_diversity_zf(q->pdcch_symbols[0], q->ce, x, q->nof_ports,
q->nof_symbols);
layerdemap_diversity(x, q->pdcch_d, q->nof_ports,
q->nof_symbols / q->nof_ports);
}
/* extract channel estimates */
for (i = 0; i < q->cell.nof_ports; i++) {
n = regs_pdcch_get(q->regs, ce[i], q->ce[i]);
if (q->nof_symbols != n) {
fprintf(stderr, "Expected %d PDCCH symbols but got %d symbols\n",
q->nof_symbols, n);
return LIBLTE_ERROR;
}
}
DEBUG("pdcch d symbols: ", 0);
if (VERBOSE_ISDEBUG()) {
vec_fprint_c(stdout, q->pdcch_d, q->nof_symbols);
}
/* in control channels, only diversity is supported */
if (q->cell.nof_ports == 1) {
/* no need for layer demapping */
predecoding_single_zf(q->pdcch_symbols[0], q->ce[0], q->pdcch_d,
q->nof_symbols);
} else {
predecoding_diversity_zf(q->pdcch_symbols[0], q->ce, x, q->cell.nof_ports,
q->nof_symbols);
layerdemap_diversity(x, q->pdcch_d, q->cell.nof_ports,
q->nof_symbols / q->cell.nof_ports);
}
/* demodulate symbols */
demod_soft_sigma_set(&q->demod, 1.0);
demod_soft_demodulate(&q->demod, q->pdcch_d, q->pdcch_llr, q->nof_symbols);
DEBUG("pdcch d symbols: ", 0);
if (VERBOSE_ISDEBUG()) {
vec_fprint_c(stdout, q->pdcch_d, q->nof_symbols);
}
DEBUG("llr: ", 0);
if (VERBOSE_ISDEBUG()) {
vec_fprint_f(stdout, q->pdcch_llr, q->nof_bits);
}
/* demodulate symbols */
demod_soft_sigma_set(&q->demod, 1.0);
demod_soft_demodulate(&q->demod, q->pdcch_d, q->pdcch_llr, q->nof_symbols);
/* descramble */
scrambling_f_offset(&q->seq_pdcch[nsubframe], llr, 0, q->nof_bits);
DEBUG("llr: ", 0);
if (VERBOSE_ISDEBUG()) {
vec_fprint_f(stdout, q->pdcch_llr, q->nof_bits);
}
/* descramble */
scrambling_f_offset(&q->seq_pdcch[nsubframe], llr, 0, q->nof_bits);
return 0;
return LIBLTE_SUCCESS;
} else {
return LIBLTE_ERROR_INVALID_INPUTS;
}
}
int pdcch_decode_current_mode(pdcch_t *q, float *llr, dci_t *dci, int subframe) {
int pdcch_decode_current_mode(pdcch_t *q, float *llr, dci_t *dci, uint8_t subframe) {
int k, i;
int ret;
if (q->current_search_mode == SEARCH_UE) {
k = subframe;
@ -459,10 +493,13 @@ int pdcch_decode_current_mode(pdcch_t *q, float *llr, dci_t *dci, int subframe)
for (i = 0;
i < q->search_mode[q->current_search_mode].nof_candidates
&& dci->nof_dcis < dci->max_dcis; i++) {
if (pdcch_decode_candidate(q, q->pdcch_llr,
ret = pdcch_decode_candidate(q, q->pdcch_llr,
&q->search_mode[q->current_search_mode].candidates[k][i],
&dci->msg[dci->nof_dcis])) {
&dci->msg[dci->nof_dcis]);
if (ret == 1) {
dci->nof_dcis++;
} else if (ret == -1) {
return LIBLTE_ERROR;
}
}
return dci->nof_dcis;
@ -476,7 +513,7 @@ int pdcch_decode_ra(pdcch_t *q, float *llr, dci_t *dci) {
pdcch_set_search_ra(q);
return pdcch_decode_current_mode(q, llr, dci, 0);
}
int pdcch_decode_ue(pdcch_t *q, float *llr, dci_t *dci, int nsubframe) {
int pdcch_decode_ue(pdcch_t *q, float *llr, dci_t *dci, uint8_t nsubframe) {
pdcch_set_search_ue(q);
return pdcch_decode_current_mode(q, llr, dci, nsubframe);
}
@ -488,25 +525,30 @@ int pdcch_decode_ue(pdcch_t *q, float *llr, dci_t *dci, int nsubframe) {
* Returns number of messages stored in dci
*/
int pdcch_decode(pdcch_t *q, cf_t *slot_symbols, cf_t *ce[MAX_PORTS],
dci_t *dci, int nsubframe) {
if (q->nof_bits == -1 || q->nof_cce == -1 || q->nof_regs == -1) {
fprintf(stderr, "Must call pdcch_set_cfi() first to set the CFI\n");
return -1;
}
dci_t *dci, uint8_t subframe, uint8_t cfi) {
if (q != NULL &&
dci != NULL &&
slot_symbols != NULL &&
subframe < 10 &&
cfi > 0 &&
cfi < 4)
{
if (pdcch_extract_llr(q, slot_symbols, ce, q->pdcch_llr, subframe, cfi)) {
return LIBLTE_ERROR;
}
if (pdcch_extract_llr(q, slot_symbols, ce, q->pdcch_llr, nsubframe)) {
return -1;
}
if (q->current_search_mode != SEARCH_NONE) {
return pdcch_decode_current_mode(q, q->pdcch_llr, dci, subframe);
}
if (q->current_search_mode != SEARCH_NONE) {
return pdcch_decode_current_mode(q, q->pdcch_llr, dci, nsubframe);
return LIBLTE_SUCCESS;
} else {
return LIBLTE_ERROR_INVALID_INPUTS;
}
return 0;
}
void crc_set_mask_rnti(char *crc, unsigned short rnti) {
void crc_set_mask_rnti(char *crc, uint16_t rnti) {
int i;
char mask[16];
char *r = mask;
@ -522,96 +564,110 @@ void crc_set_mask_rnti(char *crc, unsigned short rnti) {
/** 36.212 5.3.3.2 to 5.3.3.4
* TODO: UE transmit antenna selection CRC mask
*/
void dci_encode(pdcch_t *q, char *data, char *e, int nof_bits, int E,
unsigned short rnti) {
int dci_encode(pdcch_t *q, char *data, char *e, uint16_t nof_bits, uint16_t E,
uint16_t rnti) {
convcoder_t encoder;
char tmp[3 * (DCI_MAX_BITS + 16)];
assert(nof_bits < DCI_MAX_BITS);
if (q != NULL &&
data != NULL &&
e != NULL &&
nof_bits < DCI_MAX_BITS &&
E < q->max_bits)
{
int poly[3] = { 0x6D, 0x4F, 0x57 };
encoder.K = 7;
encoder.R = 3;
encoder.tail_biting = true;
memcpy(encoder.poly, poly, 3 * sizeof(int));
int poly[3] = { 0x6D, 0x4F, 0x57 };
encoder.K = 7;
encoder.R = 3;
encoder.tail_biting = true;
memcpy(encoder.poly, poly, 3 * sizeof(int));
crc_attach(&q->crc, data, nof_bits);
crc_set_mask_rnti(&data[nof_bits], rnti);
crc_attach(&q->crc, data, nof_bits);
crc_set_mask_rnti(&data[nof_bits], rnti);
convcoder_encode(&encoder, data, tmp, nof_bits + 16);
convcoder_encode(&encoder, data, tmp, nof_bits + 16);
DEBUG("CConv output: ", 0);
if (VERBOSE_ISDEBUG()) {
vec_fprint_b(stdout, tmp, 3 * (nof_bits + 16));
}
DEBUG("CConv output: ", 0);
if (VERBOSE_ISDEBUG()) {
vec_fprint_b(stdout, tmp, 3 * (nof_bits + 16));
}
rm_conv_tx(tmp, 3 * (nof_bits + 16), e, E);
rm_conv_tx(tmp, 3 * (nof_bits + 16), e, E);
return LIBLTE_SUCCESS;
} else {
return LIBLTE_ERROR_INVALID_INPUTS;
}
}
/** Converts the set of DCI messages to symbols mapped to the slot ready for transmission
*/
int pdcch_encode(pdcch_t *q, dci_t *dci, cf_t *slot_symbols[MAX_PORTS],
int nsubframe) {
uint8_t nsubframe, uint8_t cfi) {
int i;
/* Set pointers for layermapping & precoding */
cf_t *x[MAX_LAYERS];
if (q->nof_bits == -1 || q->nof_cce == -1 || q->nof_regs == -1) {
fprintf(stderr, "Must call pdcch_set_cfi() first to set the CFI\n");
return -1;
}
if (nsubframe < 0 || nsubframe > NSUBFRAMES_X_FRAME) {
fprintf(stderr, "Invalid subframe %d\n", nsubframe);
return -1;
}
if (q != NULL &&
dci != NULL &&
slot_symbols != NULL &&
nsubframe < 10 &&
cfi > 0 &&
cfi < 4)
{
set_cfi(q, cfi);
/* number of layers equals number of ports */
for (i = 0; i < q->cell.nof_ports; i++) {
x[i] = q->pdcch_x[i];
}
memset(&x[q->cell.nof_ports], 0, sizeof(cf_t*) * (MAX_LAYERS - q->cell.nof_ports));
/* should add <NIL> elements? Or maybe random bits to facilitate power estimation */
bzero(q->pdcch_e, q->nof_bits);
/* Encode DCIs */
for (i = 0; i < dci->nof_dcis; i++) {
/* do some checks */
if (dci->msg[i].location.ncce + PDCCH_FORMAT_NOF_CCE(dci->msg[i].location.L)
> q->nof_cce || dci->msg[i].location.L > 3
|| dci->msg[i].location.nof_bits > DCI_MAX_BITS) {
fprintf(stderr, "Illegal DCI message nCCE: %d, L: %d, nof_cce: %d\n",
dci->msg[i].location.ncce, dci->msg[i].location.L, q->nof_cce);
return LIBLTE_ERROR;
}
INFO("Encoding DCI %d: Nbits: %d, E: %d, nCCE: %d, L: %d, RNTI: 0x%x\n", i,
dci->msg[i].location.nof_bits,
PDCCH_FORMAT_NOF_BITS(dci->msg[i].location.L),
dci->msg[i].location.ncce, dci->msg[i].location.L,
dci->msg[i].location.rnti);
dci_encode(q, dci->msg[i].data, &q->pdcch_e[72 * dci->msg[i].location.ncce],
dci->msg[i].location.nof_bits,
PDCCH_FORMAT_NOF_BITS(dci->msg[i].location.L),
dci->msg[i].location.rnti);
}
/* number of layers equals number of ports */
for (i = 0; i < q->nof_ports; i++) {
x[i] = q->pdcch_x[i];
}
memset(&x[q->nof_ports], 0, sizeof(cf_t*) * (MAX_LAYERS - q->nof_ports));
/* should add <NIL> elements? Or maybe random bits to facilitate power estimation */
bzero(q->pdcch_e, q->nof_bits);
/* Encode DCIs */
for (i = 0; i < dci->nof_dcis; i++) {
/* do some sanity checks */
if (dci->msg[i].location.ncce + PDCCH_FORMAT_NOF_CCE(dci->msg[i].location.L)
> q->nof_cce || dci->msg[i].location.L > 3
|| dci->msg[i].location.nof_bits > DCI_MAX_BITS) {
fprintf(stderr, "Illegal DCI message %d\n", i);
return -1;
}
INFO("Encoding DCI %d: Nbits: %d, E: %d, nCCE: %d, L: %d, RNTI: 0x%x\n", i,
dci->msg[i].location.nof_bits,
PDCCH_FORMAT_NOF_BITS(dci->msg[i].location.L),
dci->msg[i].location.ncce, dci->msg[i].location.L,
dci->msg[i].location.rnti);
dci_encode(q, dci->msg[i].data, &q->pdcch_e[72 * dci->msg[i].location.ncce],
dci->msg[i].location.nof_bits,
PDCCH_FORMAT_NOF_BITS(dci->msg[i].location.L),
dci->msg[i].location.rnti);
}
scrambling_b_offset(&q->seq_pdcch[nsubframe], q->pdcch_e, 0, q->nof_bits);
scrambling_b_offset(&q->seq_pdcch[nsubframe], q->pdcch_e, 0, q->nof_bits);
mod_modulate(&q->mod, q->pdcch_e, q->pdcch_d, q->nof_bits);
mod_modulate(&q->mod, q->pdcch_e, q->pdcch_d, q->nof_bits);
/* layer mapping & precoding */
if (q->cell.nof_ports > 1) {
layermap_diversity(q->pdcch_d, x, q->cell.nof_ports, q->nof_symbols);
precoding_diversity(x, q->pdcch_symbols, q->cell.nof_ports,
q->nof_symbols / q->cell.nof_ports);
} else {
memcpy(q->pdcch_symbols[0], q->pdcch_d, q->nof_symbols * sizeof(cf_t));
}
/* layer mapping & precoding */
if (q->nof_ports > 1) {
layermap_diversity(q->pdcch_d, x, q->nof_ports, q->nof_symbols);
precoding_diversity(x, q->pdcch_symbols, q->nof_ports,
q->nof_symbols / q->nof_ports);
/* mapping to resource elements */
for (i = 0; i < q->cell.nof_ports; i++) {
regs_pdcch_put(q->regs, q->pdcch_symbols[i], slot_symbols[i]);
}
return LIBLTE_SUCCESS;
} else {
memcpy(q->pdcch_symbols[0], q->pdcch_d, q->nof_symbols * sizeof(cf_t));
}
/* mapping to resource elements */
for (i = 0; i < q->nof_ports; i++) {
regs_pdcch_put(q->regs, q->pdcch_symbols[i], slot_symbols[i]);
return LIBLTE_ERROR_INVALID_INPUTS;
}
return 0;
}

737
lte/phy/lib/phch/src/pdsch.c
Unescape Escape View File

@ -41,24 +41,35 @@
#include "liblte/phy/utils/debug.h"
#include "liblte/phy/utils/vector.h"
#define MAX_PDSCH_RE(cp) (2 * CP_NSYMB(cp) * 12)
const enum modem_std modulations[4] =
{ LTE_BPSK, LTE_QPSK, LTE_QAM16, LTE_QAM64 };
#define MAX_PDSCH_RE(cp) (2 * CP_NSYMB(cp) * 12)
struct cb_segm {
int F;
int C;
int K1;
int K2;
int C1;
int C2;
};
int pdsch_cp(pdsch_t *q, cf_t *input, cf_t *output, ra_prb_t *prb_alloc,
int nsubframe, bool put) {
uint8_t nsubframe, bool put) {
int s, n, l, lp, lstart, lend, nof_refs;
bool is_pbch, is_sss;
cf_t *in_ptr = input, *out_ptr = output;
int offset;
assert(q->cell_id >= 0);
INFO("%s %d RE from %d PRB\n", put ? "Putting" : "Getting",
prb_alloc->re_sf[nsubframe], prb_alloc->slot[0].nof_prb);
if (q->nof_ports == 1) {
if (q->cell.nof_ports == 1) {
nof_refs = 2;
} else {
nof_refs = 4;
@ -66,66 +77,66 @@ int pdsch_cp(pdsch_t *q, cf_t *input, cf_t *output, ra_prb_t *prb_alloc,
for (s = 0; s < 2; s++) {
for (l = 0; l < CP_NSYMB(q->cp); l++) {
for (l = 0; l < CP_NSYMB(q->cell.cp); l++) {
for (n = 0; n < prb_alloc->slot[s].nof_prb; n++) {
if (s == 0) {
lstart = prb_alloc->lstart;
} else {
lstart = 0;
}
lend = CP_NSYMB(q->cp);
lend = CP_NSYMB(q->cell.cp);
is_pbch = is_sss = false;
// Skip PSS/SSS signals
if (s == 0 && (nsubframe == 0 || nsubframe == 5)) {
if (prb_alloc->slot[s].prb_idx[n] >= q->nof_prb / 2 - 3
&& prb_alloc->slot[s].prb_idx[n] <= q->nof_prb / 2 + 3) {
lend = CP_NSYMB(q->cp) - 2;
if (prb_alloc->slot[s].prb_idx[n] >= q->cell.nof_prb / 2 - 3
&& prb_alloc->slot[s].prb_idx[n] <= q->cell.nof_prb / 2 + 3) {
lend = CP_NSYMB(q->cell.cp) - 2;
is_sss = true;
}
}
// Skip PBCH
if (s == 1 && nsubframe == 0) {
if (prb_alloc->slot[s].prb_idx[n] >= q->nof_prb / 2 - 3
&& prb_alloc->slot[s].prb_idx[n] <= q->nof_prb / 2 + 3) {
if (prb_alloc->slot[s].prb_idx[n] >= q->cell.nof_prb / 2 - 3
&& prb_alloc->slot[s].prb_idx[n] <= q->cell.nof_prb / 2 + 3) {
lstart = 4;
is_pbch = true;
}
}
lp = l + s * CP_NSYMB(q->cp);
lp = l + s * CP_NSYMB(q->cell.cp);
if (put) {
out_ptr = &output[(lp * q->nof_prb + prb_alloc->slot[s].prb_idx[n])
out_ptr = &output[(lp * q->cell.nof_prb + prb_alloc->slot[s].prb_idx[n])
* RE_X_RB];
} else {
in_ptr = &input[(lp * q->nof_prb + prb_alloc->slot[s].prb_idx[n])
in_ptr = &input[(lp * q->cell.nof_prb + prb_alloc->slot[s].prb_idx[n])
* RE_X_RB];
}
if (l >= lstart && l < lend) {
if (SYMBOL_HAS_REF(l, q->cp, q->nof_ports)) {
if (SYMBOL_HAS_REF(l, q->cell.cp, q->cell.nof_ports)) {
if (nof_refs == 2 && l != 0) {
offset = q->cell_id % 3 + 3;
offset = q->cell.id % 3 + 3;
} else {
offset = q->cell_id % 3;
offset = q->cell.id % 3;
}
prb_cp_ref(&in_ptr, &out_ptr, offset, nof_refs, nof_refs, put);
} else {
prb_cp(&in_ptr, &out_ptr, 1);
}
}
if ((q->nof_prb % 2) && ((is_pbch && l < lstart) || (is_sss && l >= lend))) {
if (prb_alloc->slot[s].prb_idx[n] == q->nof_prb / 2 - 3) {
if (SYMBOL_HAS_REF(l, q->cp, q->nof_ports)) {
if ((q->cell.nof_prb % 2) && ((is_pbch && l < lstart) || (is_sss && l >= lend))) {
if (prb_alloc->slot[s].prb_idx[n] == q->cell.nof_prb / 2 - 3) {
if (SYMBOL_HAS_REF(l, q->cell.cp, q->cell.nof_ports)) {
prb_cp_ref(&in_ptr, &out_ptr, offset, nof_refs, nof_refs/2, put);
} else {
prb_cp_half(&in_ptr, &out_ptr, 1);
}
} else if (prb_alloc->slot[s].prb_idx[n] == q->nof_prb / 2 + 3) {
} else if (prb_alloc->slot[s].prb_idx[n] == q->cell.nof_prb / 2 + 3) {
if (put) {
out_ptr += 6;
} else {
in_ptr += 6;
}
if (SYMBOL_HAS_REF(l, q->cp, q->nof_ports)) {
if (SYMBOL_HAS_REF(l, q->cell.cp, q->cell.nof_ports)) {
prb_cp_ref(&in_ptr, &out_ptr, offset, nof_refs, nof_refs/2, put);
} else {
prb_cp_half(&in_ptr, &out_ptr, 1);
@ -151,8 +162,8 @@ int pdsch_cp(pdsch_t *q, cf_t *input, cf_t *output, ra_prb_t *prb_alloc,
* 36.211 10.3 section 6.3.5
*/
int pdsch_put(pdsch_t *q, cf_t *pdsch_symbols, cf_t *sf_symbols,
ra_prb_t *prb_alloc, int nsubframe) {
return pdsch_cp(q, pdsch_symbols, sf_symbols, prb_alloc, nsubframe, true);
ra_prb_t *prb_alloc, uint8_t subframe) {
return pdsch_cp(q, pdsch_symbols, sf_symbols, prb_alloc, subframe, true);
}
/**
@ -163,117 +174,112 @@ int pdsch_put(pdsch_t *q, cf_t *pdsch_symbols, cf_t *sf_symbols,
* 36.211 10.3 section 6.3.5
*/
int pdsch_get(pdsch_t *q, cf_t *sf_symbols, cf_t *pdsch_symbols,
ra_prb_t *prb_alloc, int nsubframe) {
return pdsch_cp(q, sf_symbols, pdsch_symbols, prb_alloc, nsubframe, false);
ra_prb_t *prb_alloc, uint8_t subframe) {
return pdsch_cp(q, sf_symbols, pdsch_symbols, prb_alloc, subframe, false);
}
/** Initializes the PDCCH transmitter and receiver */
int pdsch_init(pdsch_t *q, unsigned short user_rnti, int nof_prb, int nof_ports,
int cell_id, lte_cp_t cp) {
int ret = -1;
int pdsch_init(pdsch_t *q, uint16_t user_rnti, lte_cell_t cell) {
int ret = LIBLTE_ERROR_INVALID_INPUTS;
int i;
if (cell_id < 0) {
return -1;
}
if (q != NULL &&
lte_cell_isvalid(&cell))
{
if (nof_ports > MAX_PORTS) {
fprintf(stderr, "Invalid number of ports %d\n", nof_ports);
return -1;
}
bzero(q, sizeof(pdsch_t));
ret = LIBLTE_ERROR;
bzero(q, sizeof(pdsch_t));
q->cell_id = cell_id;
q->cp = cp;
q->nof_ports = nof_ports;
q->nof_prb = nof_prb;
q->rnti = user_rnti;
q->cell = cell;
q->rnti = user_rnti;
q->max_symbols = nof_prb * MAX_PDSCH_RE(cp);
q->max_symbols = q->cell.nof_prb * MAX_PDSCH_RE(q->cell.cp);
INFO("Init PDSCH: %d ports %d PRBs, max_symbols: %d\n", q->nof_ports,
q->nof_prb, q->max_symbols);
INFO("Init PDSCH: %d ports %d PRBs, max_symbols: %d\n", q->cell.nof_ports,
q->cell.nof_prb, q->max_symbols);
for (i = 0; i < 4; i++) {
if (modem_table_std(&q->mod[i], modulations[i], true)) {
for (i = 0; i < 4; i++) {
if (modem_table_std(&q->mod[i], modulations[i], true)) {
goto clean;
}
}
if (crc_init(&q->crc_tb, LTE_CRC24A, 24)) {
goto clean;
}
}
if (crc_init(&q->crc_tb, LTE_CRC24A, 24)) {
goto clean;
}
if (crc_init(&q->crc_cb, LTE_CRC24B, 24)) {
goto clean;
}
demod_soft_init(&q->demod);
demod_soft_alg_set(&q->demod, APPROX);
for (i = 0; i < NSUBFRAMES_X_FRAME; i++) {
if (sequence_pdsch(&q->seq_pdsch[i], q->rnti, 0, 2 * i, q->cell_id,
q->max_symbols * q->mod[3].nbits_x_symbol)) {
if (crc_init(&q->crc_cb, LTE_CRC24B, 24)) {
goto clean;
}
}
if (tcod_init(&q->encoder, MAX_LONG_CB)) {
goto clean;
}
if (tdec_init(&q->decoder, MAX_LONG_CB)) {
goto clean;
}
if (rm_turbo_init(&q->rm_turbo, 3 * MAX_LONG_CB)) {
goto clean;
}
q->cb_in_b = malloc(sizeof(char) * MAX_LONG_CB);
if (!q->cb_in_b) {
goto clean;
}
q->cb_out_b = malloc(sizeof(char) * (3 * MAX_LONG_CB + 12));
if (!q->cb_out_b) {
goto clean;
}
demod_soft_init(&q->demod);
demod_soft_alg_set(&q->demod, APPROX);
q->pdsch_rm_f = malloc(sizeof(float) * (3 * MAX_LONG_CB + 12));
if (!q->pdsch_rm_f) {
goto clean;
}
for (i = 0; i < NSUBFRAMES_X_FRAME; i++) {
if (sequence_pdsch(&q->seq_pdsch[i], q->rnti, 0, 2 * i, q->cell.id,
q->max_symbols * q->mod[3].nbits_x_symbol)) {
goto clean;
}
}
q->pdsch_e_bits = malloc(
sizeof(char) * q->max_symbols * q->mod[3].nbits_x_symbol);
if (!q->pdsch_e_bits) {
goto clean;
}
if (tcod_init(&q->encoder, MAX_LONG_CB)) {
goto clean;
}
if (tdec_init(&q->decoder, MAX_LONG_CB)) {
goto clean;
}
if (rm_turbo_init(&q->rm_turbo, 3 * MAX_LONG_CB)) {
goto clean;
}
q->pdsch_llr = malloc(
sizeof(float) * q->max_symbols * q->mod[3].nbits_x_symbol);
if (!q->pdsch_llr) {
goto clean;
}
q->cb_in_b = malloc(sizeof(char) * MAX_LONG_CB);
if (!q->cb_in_b) {
goto clean;
}
q->cb_out_b = malloc(sizeof(char) * (3 * MAX_LONG_CB + 12));
if (!q->cb_out_b) {
goto clean;
}
q->pdsch_d = malloc(sizeof(cf_t) * q->max_symbols);
if (!q->pdsch_d) {
goto clean;
}
q->pdsch_rm_f = malloc(sizeof(float) * (3 * MAX_LONG_CB + 12));
if (!q->pdsch_rm_f) {
goto clean;
}
for (i = 0; i < nof_ports; i++) {
q->ce[i] = malloc(sizeof(cf_t) * q->max_symbols);
if (!q->ce[i]) {
q->pdsch_e_bits = malloc(
sizeof(char) * q->max_symbols * q->mod[3].nbits_x_symbol);
if (!q->pdsch_e_bits) {
goto clean;
}
q->pdsch_x[i] = malloc(sizeof(cf_t) * q->max_symbols);
if (!q->pdsch_x[i]) {
q->pdsch_llr = malloc(
sizeof(float) * q->max_symbols * q->mod[3].nbits_x_symbol);
if (!q->pdsch_llr) {
goto clean;
}
q->pdsch_symbols[i] = malloc(sizeof(cf_t) * q->max_symbols);
if (!q->pdsch_symbols[i]) {
q->pdsch_d = malloc(sizeof(cf_t) * q->max_symbols);
if (!q->pdsch_d) {
goto clean;
}
}
ret = 0;
clean: if (ret == -1) {
for (i = 0; i < q->cell.nof_ports; i++) {
q->ce[i] = malloc(sizeof(cf_t) * q->max_symbols);
if (!q->ce[i]) {
goto clean;
}
q->pdsch_x[i] = malloc(sizeof(cf_t) * q->max_symbols);
if (!q->pdsch_x[i]) {
goto clean;
}
q->pdsch_symbols[i] = malloc(sizeof(cf_t) * q->max_symbols);
if (!q->pdsch_symbols[i]) {
goto clean;
}
}
ret = LIBLTE_SUCCESS;
}
clean:
if (ret == LIBLTE_ERROR) {
pdsch_free(q);
}
return ret;
@ -300,7 +306,7 @@ void pdsch_free(pdsch_t *q) {
if (q->pdsch_d) {
free(q->pdsch_d);
}
for (i = 0; i < q->nof_ports; i++) {
for (i = 0; i < q->cell.nof_ports; i++) {
if (q->ce[i]) {
free(q->ce[i]);
}
@ -325,15 +331,6 @@ void pdsch_free(pdsch_t *q) {
}
struct cb_segm {
int F;
int C;
int K1;
int K2;
int C1;
int C2;
};
/* Calculate Codeblock Segmentation as in Section 5.1.2 of 36.212 */
void codeblock_segmentation(struct cb_segm *s, int tbs) {
int Bp, B, idx1;
@ -368,175 +365,191 @@ void codeblock_segmentation(struct cb_segm *s, int tbs) {
/* Decode a transport block according to 36.212 5.3.2
*
*/
int pdsch_decode_tb(pdsch_t *q, char *data, int tbs, int nb_e, int rv_idx) {
int pdsch_decode_tb(pdsch_t *q, char *data, uint16_t tbs, uint16_t nb_e, uint8_t rv_idx) {
char parity[24];
char *p_parity = parity;
unsigned int par_rx, par_tx;
uint32_t par_rx, par_tx;
int i;
int cb_len, rp, wp, rlen, F, n_e;
struct cb_segm cbs;
/* Compute CB segmentation for this TBS */
codeblock_segmentation(&cbs, tbs);
if (q != NULL &&
data != NULL &&
nb_e < q->max_symbols * q->mod[3].nbits_x_symbol)
{
/* Compute CB segmentation for this TBS */
codeblock_segmentation(&cbs, tbs);
rp = 0;
rp = 0;
wp = 0;
for (i = 0; i < cbs.C; i++) {
/* Get read/write lengths */
if (i < cbs.C - cbs.C2) {
cb_len = cbs.K1;
} else {
cb_len = cbs.K2;
}
if (cbs.C == 1) {
rlen = cb_len;
} else {
rlen = cb_len - 24;
}
if (i == 0) {
F = cbs.F;
} else {
F = 0;
}
rp = 0;
rp = 0;
wp = 0;
for (i = 0; i < cbs.C; i++) {
if (i < cbs.C - 1) {
n_e = nb_e / cbs.C;
} else {
n_e = nb_e - rp;
}
/* Get read/write lengths */
if (i < cbs.C - cbs.C2) {
cb_len = cbs.K1;
} else {
cb_len = cbs.K2;
}
if (cbs.C == 1) {
rlen = cb_len;
} else {
rlen = cb_len - 24;
}
if (i == 0) {
F = cbs.F;
} else {
F = 0;
}
INFO("CB#%d: cb_len: %d, rlen: %d, wp: %d, rp: %d, F: %d, E: %d\n", i,
cb_len, rlen - F, wp, rp, F, n_e);
if (i < cbs.C - 1) {
n_e = nb_e / cbs.C;
} else {
n_e = nb_e - rp;
}
INFO("CB#%d: cb_len: %d, rlen: %d, wp: %d, rp: %d, F: %d, E: %d\n", i,
cb_len, rlen - F, wp, rp, F, n_e);
/* Rate Unmatching */
rm_turbo_rx(&q->rm_turbo, &q->pdsch_llr[rp], n_e, q->pdsch_rm_f,
3 * cb_len + 12, rv_idx);
/* Rate Unmatching */
rm_turbo_rx(&q->rm_turbo, &q->pdsch_llr[rp], n_e, q->pdsch_rm_f,
3 * cb_len + 12, rv_idx);
/* Turbo Decoding */
tdec_run_all(&q->decoder, q->pdsch_rm_f, q->cb_in_b, TDEC_ITERATIONS,
cb_len);
/* Turbo Decoding */
tdec_run_all(&q->decoder, q->pdsch_rm_f, q->cb_in_b, TDEC_ITERATIONS,
cb_len);
if (cbs.C > 1) {
/* Check Codeblock CRC */
//crc_attach(&q->crc_cb, q->pdsch_b[wp], cb_len);
}
if (cbs.C > 1) {
/* Check Codeblock CRC */
//crc_attach(&q->crc_cb, q->pdsch_b[wp], cb_len);
}
/* Copy data to another buffer, removing the Codeblock CRC */
if (i < cbs.C - 1) {
memcpy(&data[wp], &q->cb_in_b[F], (rlen - F) * sizeof(char));
} else {
INFO("Last CB, appending parity: %d to %d from %d and 24 from %d\n",
rlen - F - 24, wp, F, rlen - 24);
/* Append Transport Block parity bits to the last CB */
memcpy(&data[wp], &q->cb_in_b[F], (rlen - F - 24) * sizeof(char));
memcpy(parity, &q->cb_in_b[rlen - 24], 24 * sizeof(char));
}
/* Copy data to another buffer, removing the Codeblock CRC */
if (i < cbs.C - 1) {
memcpy(&data[wp], &q->cb_in_b[F], (rlen - F) * sizeof(char));
} else {
INFO("Last CB, appending parity: %d to %d from %d and 24 from %d\n",
rlen - F - 24, wp, F, rlen - 24);
/* Append Transport Block parity bits to the last CB */
memcpy(&data[wp], &q->cb_in_b[F], (rlen - F - 24) * sizeof(char));
memcpy(parity, &q->cb_in_b[rlen - 24], 24 * sizeof(char));
/* Set read/write pointers */
wp += (rlen - F);
rp += n_e;
}
/* Set read/write pointers */
wp += (rlen - F);
rp += n_e;
}
INFO("END CB#%d: wp: %d, rp: %d\n", i, wp, rp);
INFO("END CB#%d: wp: %d, rp: %d\n", i, wp, rp);
// Compute transport block CRC
par_rx = crc_checksum(&q->crc_tb, data, tbs);
// Compute transport block CRC
par_rx = crc_checksum(&q->crc_tb, data, tbs);
// check parity bits
par_tx = bit_unpack(&p_parity, 24);
// check parity bits
par_tx = bit_unpack(&p_parity, 24);
if (!par_rx) {
printf("\n\tCAUTION!! Received all-zero transport block\n\n");
}
if (!par_rx) {
printf("\n\tCAUTION!! Received all-zero transport block\n\n");
if (par_rx == par_tx) {
return LIBLTE_SUCCESS;
} else {
return LIBLTE_ERROR;
}
} else {
return LIBLTE_ERROR_INVALID_INPUTS;
}
return (par_rx != par_tx);
}
/** Decodes the PDSCH from the received symbols
*/
int pdsch_decode(pdsch_t *q, cf_t *sf_symbols, cf_t *ce[MAX_PORTS], char *data,
int nsubframe, ra_mcs_t mcs, ra_prb_t *prb_alloc) {
uint8_t subframe, ra_mcs_t mcs, ra_prb_t *prb_alloc) {
/* Set pointers for layermapping & precoding */
int i, n;
cf_t *x[MAX_LAYERS];
int nof_symbols, nof_bits, nof_bits_e;
nof_bits = mcs.tbs;
nof_symbols = prb_alloc->re_sf[nsubframe];
nof_bits_e = nof_symbols * q->mod[mcs.mod - 1].nbits_x_symbol;
if (q != NULL &&
sf_symbols != NULL &&
data != NULL &&
subframe < 10 &&
prb_alloc != NULL)
{
if (nof_bits > nof_bits_e) {
fprintf(stderr, "Invalid code rate %.2f\n", (float) nof_bits / nof_bits_e);
return -1;
}
if (nof_symbols > q->max_symbols) {
fprintf(stderr,
"Error too many RE per subframe (%d). PDSCH configured for %d RE (%d PRB)\n",
nof_symbols, q->max_symbols, q->nof_prb);
return -1;
}
nof_bits = mcs.tbs;
nof_symbols = prb_alloc->re_sf[subframe];
nof_bits_e = nof_symbols * q->mod[mcs.mod - 1].nbits_x_symbol;
INFO("Decoding PDSCH SF: %d, Mod %d, NofBits: %d, NofSymbols: %d, NofBitsE: %d\n",
nsubframe, mcs.mod, nof_bits, nof_symbols, nof_bits_e);
if (nof_bits > nof_bits_e) {
fprintf(stderr, "Invalid code rate %.2f\n", (float) nof_bits / nof_bits_e);
return LIBLTE_ERROR_INVALID_INPUTS;
}
if (nsubframe < 0 || nsubframe > NSUBFRAMES_X_FRAME) {
fprintf(stderr, "Invalid subframe %d\n", nsubframe);
return -1;
}
if (nof_symbols > q->max_symbols) {
fprintf(stderr,
"Error too many RE per subframe (%d). PDSCH configured for %d RE (%d PRB)\n",
nof_symbols, q->max_symbols, q->cell.nof_prb);
return LIBLTE_ERROR_INVALID_INPUTS;
}
/* number of layers equals number of ports */
for (i = 0; i < q->nof_ports; i++) {
x[i] = q->pdsch_x[i];
}
memset(&x[q->nof_ports], 0, sizeof(cf_t*) * (MAX_LAYERS - q->nof_ports));
INFO("Decoding PDSCH SF: %d, Mod %d, NofBits: %d, NofSymbols: %d, NofBitsE: %d\n",
subframe, mcs.mod, nof_bits, nof_symbols, nof_bits_e);
/* extract symbols */
n = pdsch_get(q, sf_symbols, q->pdsch_symbols[0], prb_alloc, nsubframe);
if (n != nof_symbols) {
fprintf(stderr, "Error expecting %d symbols but got %d\n", nof_symbols, n);
return -1;
}
/* number of layers equals number of ports */
for (i = 0; i < q->cell.nof_ports; i++) {
x[i] = q->pdsch_x[i];
}
memset(&x[q->cell.nof_ports], 0, sizeof(cf_t*) * (MAX_LAYERS - q->cell.nof_ports));
/* extract channel estimates */
for (i = 0; i < q->nof_ports; i++) {
n = pdsch_get(q, ce[i], q->ce[i], prb_alloc, nsubframe);
/* extract symbols */
n = pdsch_get(q, sf_symbols, q->pdsch_symbols[0], prb_alloc, subframe);
if (n != nof_symbols) {
fprintf(stderr, "Error expecting %d symbols but got %d\n", nof_symbols, n);
return -1;
return LIBLTE_ERROR;
}
}
/* TODO: only diversity is supported */
if (q->nof_ports == 1) {
/* no need for layer demapping */
predecoding_single_zf(q->pdsch_symbols[0], q->ce[0], q->pdsch_d,
nof_symbols);
} else {
predecoding_diversity_zf(q->pdsch_symbols[0], q->ce, x, q->nof_ports,
nof_symbols);
layerdemap_diversity(x, q->pdsch_d, q->nof_ports,
nof_symbols / q->nof_ports);
}
/* extract channel estimates */
for (i = 0; i < q->cell.nof_ports; i++) {
n = pdsch_get(q, ce[i], q->ce[i], prb_alloc, subframe);
if (n != nof_symbols) {
fprintf(stderr, "Error expecting %d symbols but got %d\n", nof_symbols, n);
return LIBLTE_ERROR;
}
}
/* demodulate symbols */
demod_soft_sigma_set(&q->demod, 2.0 / q->mod[mcs.mod - 1].nbits_x_symbol);
demod_soft_table_set(&q->demod, &q->mod[mcs.mod - 1]);
demod_soft_demodulate(&q->demod, q->pdsch_d, q->pdsch_llr, nof_symbols);
/* TODO: only diversity is supported */
if (q->cell.nof_ports == 1) {
/* no need for layer demapping */
predecoding_single_zf(q->pdsch_symbols[0], q->ce[0], q->pdsch_d,
nof_symbols);
} else {
predecoding_diversity_zf(q->pdsch_symbols[0], q->ce, x, q->cell.nof_ports,
nof_symbols);
layerdemap_diversity(x, q->pdsch_d, q->cell.nof_ports,
nof_symbols / q->cell.nof_ports);
}
/* descramble */
scrambling_f_offset(&q->seq_pdsch[nsubframe], q->pdsch_llr, 0, nof_bits_e);
/* demodulate symbols */
demod_soft_sigma_set(&q->demod, 2.0 / q->mod[mcs.mod - 1].nbits_x_symbol);
demod_soft_table_set(&q->demod, &q->mod[mcs.mod - 1]);
demod_soft_demodulate(&q->demod, q->pdsch_d, q->pdsch_llr, nof_symbols);
return pdsch_decode_tb(q, data, nof_bits, nof_bits_e, 0);
/* descramble */
scrambling_f_offset(&q->seq_pdsch[subframe], q->pdsch_llr, 0, nof_bits_e);
return pdsch_decode_tb(q, data, nof_bits, nof_bits_e, 0);
} else {
return LIBLTE_ERROR_INVALID_INPUTS;
}
}
/* Encode a transport block according to 36.212 5.3.2
*
*/
void pdsch_encode_tb(pdsch_t *q, char *data, int tbs, int nb_e, int rv_idx) {
int pdsch_encode_tb(pdsch_t *q, char *data, uint16_t tbs, uint16_t nb_e, uint8_t rv_idx) {
char parity[24];
char *p_parity = parity;
unsigned int par;
@ -544,152 +557,174 @@ void pdsch_encode_tb(pdsch_t *q, char *data, int tbs, int nb_e, int rv_idx) {
int cb_len, rp, wp, rlen, F, n_e;
struct cb_segm cbs;
/* Compute CB segmentation */
codeblock_segmentation(&cbs, tbs);
/* Compute transport block CRC */
par = crc_checksum(&q->crc_tb, data, tbs);
if (q != NULL &&
data != NULL &&
nb_e < q->max_symbols * q->mod[3].nbits_x_symbol)
{
/* parity bits will be appended later */
bit_pack(par, &p_parity, 24);
/* Compute CB segmentation */
codeblock_segmentation(&cbs, tbs);
if (VERBOSE_ISDEBUG()) {
DEBUG("DATA: ", 0);
vec_fprint_b(stdout, data, tbs);
DEBUG("PARITY: ", 0);
vec_fprint_b(stdout, parity, 24);
}
/* Add filler bits to the new data buffer */
for (i = 0; i < cbs.F; i++) {
q->cb_in_b[i] = LTE_NULL_BIT;
}
/* Compute transport block CRC */
par = crc_checksum(&q->crc_tb, data, tbs);
wp = 0;
rp = 0;
for (i = 0; i < cbs.C; i++) {
/* parity bits will be appended later */
bit_pack(par, &p_parity, 24);
/* Get read lengths */
if (i < cbs.C - cbs.C2) {
cb_len = cbs.K1;
} else {
cb_len = cbs.K2;
}
if (cbs.C > 1) {
rlen = cb_len - 24;
} else {
rlen = cb_len;
}
if (i == 0) {
F = cbs.F;
} else {
F = 0;
if (VERBOSE_ISDEBUG()) {
DEBUG("DATA: ", 0);
vec_fprint_b(stdout, data, tbs);
DEBUG("PARITY: ", 0);
vec_fprint_b(stdout, parity, 24);
}
if (i < cbs.C - 1) {
n_e = nb_e / cbs.C;
} else {
n_e = nb_e - wp;
/* Add filler bits to the new data buffer */
for (i = 0; i < cbs.F; i++) {
q->cb_in_b[i] = LTE_NULL_BIT;
}
INFO("CB#%d: cb_len: %d, rlen: %d, wp: %d, rp: %d, F: %d, E: %d\n", i,
cb_len, rlen - F, wp, rp, F, n_e);
wp = 0;
rp = 0;
for (i = 0; i < cbs.C; i++) {
/* Copy data to another buffer, making space for the Codeblock CRC */
if (i < cbs.C - 1) {
memcpy(&q->cb_in_b[F], &data[rp], (rlen - F) * sizeof(char));
} else {
INFO("Last CB, appending parity: %d from %d and 24 to %d\n",
rlen - F - 24, rp, rlen - 24);
/* Append Transport Block parity bits to the last CB */
memcpy(&q->cb_in_b[F], &data[rp], (rlen - F - 24) * sizeof(char));
memcpy(&q->cb_in_b[rlen - 24], parity, 24 * sizeof(char));
}
/* Get read lengths */
if (i < cbs.C - cbs.C2) {
cb_len = cbs.K1;
} else {
cb_len = cbs.K2;
}
if (cbs.C > 1) {
rlen = cb_len - 24;
} else {
rlen = cb_len;
}
if (i == 0) {
F = cbs.F;
} else {
F = 0;
}
if (cbs.C > 1) {
/* Attach Codeblock CRC */
crc_attach(&q->crc_cb, q->cb_in_b, rlen);
}
if (i < cbs.C - 1) {
n_e = nb_e / cbs.C;
} else {
n_e = nb_e - wp;
}
if (VERBOSE_ISDEBUG()) {
DEBUG("CB#%d Len=%d: ", i, cb_len);
vec_fprint_b(stdout, q->cb_in_b, cb_len);
}
INFO("CB#%d: cb_len: %d, rlen: %d, wp: %d, rp: %d, F: %d, E: %d\n", i,
cb_len, rlen - F, wp, rp, F, n_e);
/* Copy data to another buffer, making space for the Codeblock CRC */
if (i < cbs.C - 1) {
memcpy(&q->cb_in_b[F], &data[rp], (rlen - F) * sizeof(char));
} else {
INFO("Last CB, appending parity: %d from %d and 24 to %d\n",
rlen - F - 24, rp, rlen - 24);
/* Append Transport Block parity bits to the last CB */
memcpy(&q->cb_in_b[F], &data[rp], (rlen - F - 24) * sizeof(char));
memcpy(&q->cb_in_b[rlen - 24], parity, 24 * sizeof(char));
}
/* Turbo Encoding */
tcod_encode(&q->encoder, q->cb_in_b, q->cb_out_b, cb_len);
if (cbs.C > 1) {
/* Attach Codeblock CRC */
crc_attach(&q->crc_cb, q->cb_in_b, rlen);
}
/* Rate matching */
rm_turbo_tx(&q->rm_turbo, q->cb_out_b, 3 * cb_len + 12,
&q->pdsch_e_bits[wp], n_e, rv_idx);
if (VERBOSE_ISDEBUG()) {
DEBUG("CB#%d Len=%d: ", i, cb_len);
vec_fprint_b(stdout, q->cb_in_b, cb_len);
}
/* Set read/write pointers */
rp += (rlen - F);
wp += n_e;
}
/* Turbo Encoding */
tcod_encode(&q->encoder, q->cb_in_b, q->cb_out_b, cb_len);
INFO("END CB#%d: wp: %d, rp: %d\n", i, wp, rp);
/* Rate matching */
rm_turbo_tx(&q->rm_turbo, q->cb_out_b, 3 * cb_len + 12,
&q->pdsch_e_bits[wp], n_e, rv_idx);
/* Set read/write pointers */
rp += (rlen - F);
wp += n_e;
}
INFO("END CB#%d: wp: %d, rp: %d\n", i, wp, rp);
return LIBLTE_SUCCESS;
} else {
return LIBLTE_ERROR_INVALID_INPUTS;
}
}
/** Converts the PDSCH data bits to symbols mapped to the slot ready for transmission
*/
int pdsch_encode(pdsch_t *q, char *data, cf_t *sf_symbols[MAX_PORTS],
int nsubframe, ra_mcs_t mcs, ra_prb_t *prb_alloc) {
uint8_t subframe, ra_mcs_t mcs, ra_prb_t *prb_alloc) {
int i;
int nof_symbols, nof_bits, nof_bits_e;
uint16_t nof_symbols, nof_bits, nof_bits_e;
/* Set pointers for layermapping & precoding */
cf_t *x[MAX_LAYERS];
if (nsubframe < 0 || nsubframe > NSUBFRAMES_X_FRAME) {
fprintf(stderr, "Invalid subframe %d\n", nsubframe);
return -1;
}
if (q != NULL &&
data != NULL &&
subframe < 10 &&
prb_alloc != NULL)
{
nof_bits = mcs.tbs;
nof_symbols = prb_alloc->re_sf[nsubframe];
nof_bits_e = nof_symbols * q->mod[mcs.mod - 1].nbits_x_symbol;
for (i=0;i<q->cell.nof_ports;i++) {
if (sf_symbols[i] == NULL) {
return LIBLTE_ERROR_INVALID_INPUTS;
}
}
if (nof_bits > nof_bits_e) {
fprintf(stderr, "Invalid code rate %.2f\n", (float) nof_bits / nof_bits_e);
return -1;
}
nof_bits = mcs.tbs;
nof_symbols = prb_alloc->re_sf[subframe];
nof_bits_e = nof_symbols * q->mod[mcs.mod - 1].nbits_x_symbol;
if (nof_symbols > q->max_symbols) {
fprintf(stderr,
"Error too many RE per subframe (%d). PDSCH configured for %d RE (%d PRB)\n",
nof_symbols, q->max_symbols, q->nof_prb);
return -1;
}
if (nof_bits > nof_bits_e) {
fprintf(stderr, "Invalid code rate %.2f\n", (float) nof_bits / nof_bits_e);
return LIBLTE_ERROR_INVALID_INPUTS;
}
INFO(
"Encoding PDSCH SF: %d, Mod %d, NofBits: %d, NofSymbols: %d, NofBitsE: %d\n",
nsubframe, mcs.mod, nof_bits, nof_symbols, nof_bits_e);
if (nof_symbols > q->max_symbols) {
fprintf(stderr,
"Error too many RE per subframe (%d). PDSCH configured for %d RE (%d PRB)\n",
nof_symbols, q->max_symbols, q->cell.nof_prb);
return LIBLTE_ERROR_INVALID_INPUTS;
}
/* number of layers equals number of ports */
for (i = 0; i < q->nof_ports; i++) {
x[i] = q->pdsch_x[i];
}
memset(&x[q->nof_ports], 0, sizeof(cf_t*) * (MAX_LAYERS - q->nof_ports));
INFO("Encoding PDSCH SF: %d, Mod %d, NofBits: %d, NofSymbols: %d, NofBitsE: %d\n",
subframe, mcs.mod, nof_bits, nof_symbols, nof_bits_e);
pdsch_encode_tb(q, data, nof_bits, nof_bits_e, 0);
/* number of layers equals number of ports */
for (i = 0; i < q->cell.nof_ports; i++) {
x[i] = q->pdsch_x[i];
}
memset(&x[q->cell.nof_ports], 0, sizeof(cf_t*) * (MAX_LAYERS - q->cell.nof_ports));
scrambling_b_offset(&q->seq_pdsch[nsubframe], q->pdsch_e_bits, 0, nof_bits_e);
if (pdsch_encode_tb(q, data, nof_bits, nof_bits_e, 0)) {
fprintf(stderr, "Error encoding TB\n");
return LIBLTE_ERROR;
}
mod_modulate(&q->mod[mcs.mod - 1], q->pdsch_e_bits, q->pdsch_d, nof_bits_e);
scrambling_b_offset(&q->seq_pdsch[subframe], q->pdsch_e_bits, 0, nof_bits_e);
/* TODO: only diversity supported */
if (q->nof_ports > 1) {
layermap_diversity(q->pdsch_d, x, q->nof_ports, nof_symbols);
precoding_diversity(x, q->pdsch_symbols, q->nof_ports,
nof_symbols / q->nof_ports);
} else {
memcpy(q->pdsch_symbols[0], q->pdsch_d, nof_symbols * sizeof(cf_t));
}
mod_modulate(&q->mod[mcs.mod - 1], q->pdsch_e_bits, q->pdsch_d, nof_bits_e);
/* mapping to resource elements */
for (i = 0; i < q->nof_ports; i++) {
pdsch_put(q, q->pdsch_symbols[i], sf_symbols[i], prb_alloc, nsubframe);
/* TODO: only diversity supported */
if (q->cell.nof_ports > 1) {
layermap_diversity(q->pdsch_d, x, q->cell.nof_ports, nof_symbols);
precoding_diversity(x, q->pdsch_symbols, q->cell.nof_ports,
nof_symbols / q->cell.nof_ports);
} else {
memcpy(q->pdsch_symbols[0], q->pdsch_d, nof_symbols * sizeof(cf_t));
}
/* mapping to resource elements */
for (i = 0; i < q->cell.nof_ports; i++) {
pdsch_put(q, q->pdsch_symbols[i], sf_symbols[i], prb_alloc, subframe);
}
return LIBLTE_SUCCESS;
} else {
return LIBLTE_ERROR_INVALID_INPUTS;
}
return 0;
}

146
lte/phy/lib/phch/src/phich.c
Unescape Escape View File

@ -49,11 +49,8 @@ const cf_t w_normal[PHICH_NORM_NSEQUENCES][4] = { { 1, 1, 1, 1 },
const cf_t w_ext[PHICH_EXT_NSEQUENCES][2] = { { 1, 1 }, { 1, -1 }, { I, I }, {
I, -I } };
bool phich_exists(int nframe, int nslot) {
return true;
}
int phich_ngroups(phich_t *q) {
uint8_t phich_ngroups(phich_t *q) {
return regs_phich_ngroups(q->regs);
}
@ -65,30 +62,36 @@ void phich_reset(phich_t *q, cf_t *slot_symbols[MAX_PORTS]) {
}
/** Initializes the phich channel receiver */
int phich_init(phich_t *q, regs_t *regs, int cell_id, int nof_prb,
int nof_tx_ports, lte_cp_t cp) {
int ret = -1;
bzero(q, sizeof(phich_t));
q->cp = cp;
q->regs = regs;
q->nof_prb = nof_prb;
q->nof_tx_ports = nof_tx_ports;
if (modem_table_std(&q->mod, LTE_BPSK, false)) {
goto clean;
}
int phich_init(phich_t *q, regs_t *regs, lte_cell_t cell) {
int ret = LIBLTE_ERROR_INVALID_INPUTS;
if (q != NULL &&
regs != NULL &&
lte_cell_isvalid(&cell))
{
bzero(q, sizeof(phich_t));
ret = LIBLTE_ERROR;
demod_hard_init(&q->demod);
demod_hard_table_set(&q->demod, LTE_BPSK);
q->cell = cell;
q->regs = regs;
for (int nsf = 0; nsf < NSUBFRAMES_X_FRAME; nsf++) {
if (sequence_phich(&q->seq_phich[nsf], 2 * nsf, cell_id)) {
if (modem_table_std(&q->mod, LTE_BPSK, false)) {
goto clean;
}
}
ret = 0;
clean: if (ret == -1) {
demod_hard_init(&q->demod);
demod_hard_table_set(&q->demod, LTE_BPSK);
for (int nsf = 0; nsf < NSUBFRAMES_X_FRAME; nsf++) {
if (sequence_phich(&q->seq_phich[nsf], 2 * nsf, q->cell.id)) {
goto clean;
}
}
ret = LIBLTE_SUCCESS;
}
clean:
if (ret == LIBLTE_ERROR) {
phich_free(q);
}
return ret;
@ -104,7 +107,7 @@ void phich_free(phich_t *q) {
/* Decodes ACK
*
*/
char phich_ack_decode(char bits[PHICH_NBITS], int *distance) {
char phich_ack_decode(char bits[PHICH_NBITS], uint8_t *distance) {
int i, n;
n = 0;
@ -137,36 +140,40 @@ void phich_ack_encode(char ack, char bits[PHICH_NBITS]) {
* Returns 1 if successfully decoded the CFI, 0 if not and -1 on error
*/
int phich_decode(phich_t *q, cf_t *slot_symbols, cf_t *ce[MAX_PORTS],
int ngroup, int nseq, int nsubframe, char *ack, int *distance) {
uint8_t ngroup, uint8_t nseq, uint8_t subframe, char *ack, uint8_t *distance) {
/* Set pointers for layermapping & precoding */
int i, j;
cf_t *x[MAX_LAYERS];
cf_t *ce_precoding[MAX_PORTS];
DEBUG("Decoding PHICH Ngroup: %d, Nseq: %d\n", ngroup, nseq);
if (q == NULL || slot_symbols == NULL) {
return LIBLTE_ERROR_INVALID_INPUTS;
}
if (nsubframe < 0 || nsubframe > NSUBFRAMES_X_FRAME) {
fprintf(stderr, "Invalid nslot %d\n", nsubframe);
return -1;
if (subframe >= NSUBFRAMES_X_FRAME) {
fprintf(stderr, "Invalid nslot %d\n", subframe);
return LIBLTE_ERROR_INVALID_INPUTS;
}
if (CP_ISEXT(q->cp)) {
if (nseq < 0 || nseq > PHICH_EXT_NSEQUENCES) {
if (CP_ISEXT(q->cell.cp)) {
if (nseq >= PHICH_EXT_NSEQUENCES) {
fprintf(stderr, "Invalid nseq %d\n", nseq);
return -1;
return LIBLTE_ERROR_INVALID_INPUTS;
}
} else {
if (nseq < 0 || nseq > PHICH_NORM_NSEQUENCES) {
if (nseq >= PHICH_NORM_NSEQUENCES) {
fprintf(stderr, "Invalid nseq %d\n", nseq);
return -1;
return LIBLTE_ERROR_INVALID_INPUTS;
}
}
if (ngroup >= regs_phich_ngroups(q->regs)) {
fprintf(stderr, "Invalid ngroup %d\n", ngroup);
return -1;
return LIBLTE_ERROR_INVALID_INPUTS;
}
DEBUG("Decoding PHICH Ngroup: %d, Nseq: %d\n", ngroup, nseq);
/* number of layers equals number of ports */
for (i = 0; i < MAX_PORTS; i++) {
x[i] = q->phich_x[i];
@ -179,34 +186,34 @@ int phich_decode(phich_t *q, cf_t *slot_symbols, cf_t *ce[MAX_PORTS],
if (PHICH_MAX_NSYMB
!= regs_phich_get(q->regs, slot_symbols, q->phich_symbols[0], ngroup)) {
fprintf(stderr, "There was an error getting the phich symbols\n");
return -1;
return LIBLTE_ERROR;
}
/* extract channel estimates */
for (i = 0; i < q->nof_tx_ports; i++) {
for (i = 0; i < q->cell.nof_ports; i++) {
if (PHICH_MAX_NSYMB != regs_phich_get(q->regs, ce[i], q->ce[i], ngroup)) {
fprintf(stderr, "There was an error getting the phich symbols\n");
return -1;
return LIBLTE_ERROR;
}
}
/* in control channels, only diversity is supported */
if (q->nof_tx_ports == 1) {
if (q->cell.nof_ports == 1) {
/* no need for layer demapping */
predecoding_single_zf(q->phich_symbols[0], q->ce[0], q->phich_d0,
PHICH_MAX_NSYMB);
} else {
predecoding_diversity_zf(q->phich_symbols[0], ce_precoding, x,
q->nof_tx_ports, PHICH_MAX_NSYMB);
layerdemap_diversity(x, q->phich_d0, q->nof_tx_ports,
PHICH_MAX_NSYMB / q->nof_tx_ports);
q->cell.nof_ports, PHICH_MAX_NSYMB);
layerdemap_diversity(x, q->phich_d0, q->cell.nof_ports,
PHICH_MAX_NSYMB / q->cell.nof_ports);
}
DEBUG("Recv!!: \n", 0);
DEBUG("d0: ", 0);
if (VERBOSE_ISDEBUG())
vec_fprint_c(stdout, q->phich_d0, PHICH_MAX_NSYMB);
if (CP_ISEXT(q->cp)) {
if (CP_ISEXT(q->cell.cp)) {
if (ngroup % 2) {
for (i = 0; i < PHICH_EXT_MSYMB / 2; i++) {
q->phich_d[2 * i + 0] = q->phich_d0[4 * i + 2];
@ -226,10 +233,10 @@ int phich_decode(phich_t *q, cf_t *slot_symbols, cf_t *ce[MAX_PORTS],
if (VERBOSE_ISDEBUG())
vec_fprint_c(stdout, q->phich_d, PHICH_EXT_MSYMB);
scrambling_c(&q->seq_phich[nsubframe], q->phich_d);
scrambling_c(&q->seq_phich[subframe], q->phich_d);
/* De-spreading */
if (CP_ISEXT(q->cp)) {
if (CP_ISEXT(q->cell.cp)) {
for (i = 0; i < PHICH_NBITS; i++) {
q->phich_z[i] = 0;
for (j = 0; j < PHICH_EXT_NSF; j++) {
@ -257,43 +264,48 @@ int phich_decode(phich_t *q, cf_t *slot_symbols, cf_t *ce[MAX_PORTS],
*ack = phich_ack_decode(q->data, distance);
}
return 0;
return LIBLTE_SUCCESS;
}
/** Encodes ACK/NACK bits, modulates and inserts into resource.
* The parameter ack is an array of phich_ngroups() pointers to buffers of nof_sequences chars
*/
int phich_encode(phich_t *q, char ack, int ngroup, int nseq, int nsubframe,
int phich_encode(phich_t *q, char ack, uint8_t ngroup, uint8_t nseq, uint8_t subframe,
cf_t *slot_symbols[MAX_PORTS]) {
int i;
if (nsubframe < 0 || nsubframe > NSUBFRAMES_X_FRAME) {
fprintf(stderr, "Invalid nslot %d\n", nsubframe);
return -1;
if (q == NULL || slot_symbols == NULL) {
return LIBLTE_ERROR_INVALID_INPUTS;
}
if (subframe >= NSUBFRAMES_X_FRAME) {
fprintf(stderr, "Invalid nslot %d\n", subframe);
return LIBLTE_ERROR_INVALID_INPUTS;
}
if (CP_ISEXT(q->cp)) {
if (nseq < 0 || nseq > PHICH_EXT_NSEQUENCES) {
if (CP_ISEXT(q->cell.cp)) {
if (nseq >= PHICH_EXT_NSEQUENCES) {
fprintf(stderr, "Invalid nseq %d\n", nseq);
return -1;
return LIBLTE_ERROR_INVALID_INPUTS;
}
} else {
if (nseq < 0 || nseq > PHICH_NORM_NSEQUENCES) {
if (nseq >= PHICH_NORM_NSEQUENCES) {
fprintf(stderr, "Invalid nseq %d\n", nseq);
return -1;
return LIBLTE_ERROR_INVALID_INPUTS;
}
}
if (ngroup >= regs_phich_ngroups(q->regs)) {
fprintf(stderr, "Invalid ngroup %d\n", ngroup);
return -1;
return LIBLTE_ERROR_INVALID_INPUTS;
}
/* Set pointers for layermapping & precoding */
cf_t *x[MAX_LAYERS];
cf_t *symbols_precoding[MAX_PORTS];
/* number of layers equals number of ports */
for (i = 0; i < q->nof_tx_ports; i++) {
for (i = 0; i < q->cell.nof_ports; i++) {
x[i] = q->phich_x[i];
}
for (i = 0; i < MAX_PORTS; i++) {
@ -310,7 +322,7 @@ int phich_encode(phich_t *q, char ack, int ngroup, int nseq, int nsubframe,
vec_fprint_c(stdout, q->phich_z, PHICH_NBITS);
/* Spread with w */
if (CP_ISEXT(q->cp)) {
if (CP_ISEXT(q->cell.cp)) {
for (i = 0; i < PHICH_EXT_MSYMB; i++) {
q->phich_d[i] = w_ext[nseq][i % PHICH_EXT_NSF]
* q->phich_z[i / PHICH_EXT_NSF];
@ -326,10 +338,10 @@ int phich_encode(phich_t *q, char ack, int ngroup, int nseq, int nsubframe,
if (VERBOSE_ISDEBUG())
vec_fprint_c(stdout, q->phich_d, PHICH_EXT_MSYMB);
scrambling_c(&q->seq_phich[nsubframe], q->phich_d);
scrambling_c(&q->seq_phich[subframe], q->phich_d);
/* align to REG */
if (CP_ISEXT(q->cp)) {
if (CP_ISEXT(q->cell.cp)) {
if (ngroup % 2) {
for (i = 0; i < PHICH_EXT_MSYMB / 2; i++) {
q->phich_d0[4 * i + 0] = 0;
@ -354,24 +366,24 @@ int phich_encode(phich_t *q, char ack, int ngroup, int nseq, int nsubframe,
vec_fprint_c(stdout, q->phich_d0, PHICH_MAX_NSYMB);
/* layer mapping & precoding */
if (q->nof_tx_ports > 1) {
layermap_diversity(q->phich_d0, x, q->nof_tx_ports, PHICH_MAX_NSYMB);
precoding_diversity(x, symbols_precoding, q->nof_tx_ports,
PHICH_MAX_NSYMB / q->nof_tx_ports);
if (q->cell.nof_ports > 1) {
layermap_diversity(q->phich_d0, x, q->cell.nof_ports, PHICH_MAX_NSYMB);
precoding_diversity(x, symbols_precoding, q->cell.nof_ports,
PHICH_MAX_NSYMB / q->cell.nof_ports);
/**FIXME: According to 6.9.2, Precoding for 4 tx ports is different! */
} else {
memcpy(q->phich_symbols[0], q->phich_d0, PHICH_MAX_NSYMB * sizeof(cf_t));
}
/* mapping to resource elements */
for (i = 0; i < q->nof_tx_ports; i++) {
for (i = 0; i < q->cell.nof_ports; i++) {
if (regs_phich_add(q->regs, q->phich_symbols[i], ngroup, slot_symbols[i])
< 0) {
fprintf(stderr, "Error putting PCHICH resource elements\n");
return -1;
return LIBLTE_ERROR;
}
}
return 0;
return LIBLTE_SUCCESS;
}

301
lte/phy/lib/phch/src/regs.c
Unescape Escape View File

@ -34,7 +34,23 @@
#include "liblte/phy/phch/regs.h"
#include "liblte/phy/utils/debug.h"
regs_reg_t *regs_find_reg(regs_t *h, int k, int l);
regs_reg_t *regs_find_reg(regs_t *h, uint16_t k, uint8_t l);
int regs_put_reg(regs_reg_t *reg,
cf_t *reg_data,
cf_t *slot_symbols,
uint8_t nof_prb);
int regs_add_reg(regs_reg_t *reg,
cf_t *reg_data,
cf_t *slot_symbols,
uint8_t nof_prb);
int regs_get_reg(regs_reg_t *reg,
cf_t *slot_symbols,
cf_t *reg_data,
uint8_t nof_prb);
int regs_reset_reg(regs_reg_t *reg, cf_t *slot_symbols, uint8_t nof_prb);
/***************************************************************
@ -62,14 +78,14 @@ const unsigned char PDCCH_PERM[PDCCH_NCOLS] =
*/
int regs_pdcch_init(regs_t *h) {
int i, m, cfi, nof_ctrl_symbols;
int ret = -1;
int ret = LIBLTE_ERROR;
int nrows, ndummy, j, k, kp;
regs_reg_t **tmp = NULL;
bzero(&h->pdcch, sizeof(regs_ch_t));
for (cfi=0;cfi<3;cfi++) {
if (h->nof_prb < 10) {
if (h->cell.nof_prb < 10) {
nof_ctrl_symbols = cfi+2;
} else {
nof_ctrl_symbols = cfi+1;
@ -110,7 +126,7 @@ int regs_pdcch_init(regs_t *h) {
for (i = 0; i < nrows; i++) {
if (i*PDCCH_NCOLS + PDCCH_PERM[j] >= ndummy) {
m = i*PDCCH_NCOLS + PDCCH_PERM[j]-ndummy;
kp = (k-h->cell_id)%h->pdcch[cfi].nof_regs;
kp = (k-h->cell.id)%h->pdcch[cfi].nof_regs;
if (kp < 0) {
kp += h->pdcch[cfi].nof_regs;
}
@ -124,23 +140,23 @@ int regs_pdcch_init(regs_t *h) {
tmp = NULL;
}
ret = 0;
ret = LIBLTE_SUCCESS;
clean_and_exit:
if (tmp) {
free(tmp);
}
if (ret == -1) {
if (ret == LIBLTE_ERROR) {
regs_pdcch_free(h);
}
return ret;
}
int regs_pdcch_nregs(regs_t *h, int cfi) {
int regs_pdcch_nregs(regs_t *h, uint8_t cfi) {
if (cfi < 1 || cfi > 3) {
fprintf(stderr, "Invalid CFI=%d\n", cfi);
return -1;
return LIBLTE_ERROR;
} else {
return h->pdcch[cfi-1].nof_regs;
return (int) h->pdcch[cfi-1].nof_regs;
}
}
@ -148,25 +164,25 @@ int regs_pdcch_nregs(regs_t *h, int cfi) {
* second part of 6.8.5 in 36.211
*/
int regs_pdcch_put(regs_t *h, cf_t *pdcch_symbols, cf_t *slot_symbols) {
if (h->cfi == -1) {
if (!h->cfi_initiated) {
fprintf(stderr, "Must call regs_set_cfi() first\n");
return -1;
return LIBLTE_ERROR;
}
int i;
for (i=0;i<h->pdcch[h->cfi].nof_regs;i++) {
regs_put_reg(h->pdcch[h->cfi].regs[i], &pdcch_symbols[i*4], slot_symbols, h->nof_prb);
regs_put_reg(h->pdcch[h->cfi].regs[i], &pdcch_symbols[i*4], slot_symbols, h->cell.nof_prb);
}
return h->pdcch[h->cfi].nof_regs*4;
}
int regs_pdcch_get(regs_t *h, cf_t *slot_symbols, cf_t *pdcch_symbols) {
if (h->cfi == -1) {
if (!h->cfi_initiated) {
fprintf(stderr, "Must call regs_set_cfi() first\n");
return -1;
return LIBLTE_ERROR;
}
int i;
for (i=0;i<h->pdcch[h->cfi].nof_regs;i++) {
regs_get_reg(h->pdcch[h->cfi].regs[i], slot_symbols, &pdcch_symbols[i*4], h->nof_prb);
regs_get_reg(h->pdcch[h->cfi].regs[i], slot_symbols, &pdcch_symbols[i*4], h->cell.nof_prb);
}
return h->pdcch[h->cfi].nof_regs*4;
}
@ -187,7 +203,7 @@ int regs_phich_init(regs_t *h) {
float ng;
int i,ni,li,n[3],nreg,mi;
regs_reg_t **regs_phich[3];
int ret = -1;
int ret = LIBLTE_ERROR;
switch(h->phich_res) {
case R_1_6:
@ -206,7 +222,7 @@ int regs_phich_init(regs_t *h) {
ng = 0;
break;
}
h->ngroups_phich = (int) ceilf(ng * ((float) h->nof_prb/8));
h->ngroups_phich = (int) ceilf(ng * ((float) h->cell.nof_prb/8));
h->phich = malloc(sizeof(regs_ch_t) * h->ngroups_phich);
if (!h->phich) {
perror("malloc");
@ -255,7 +271,7 @@ int regs_phich_init(regs_t *h) {
for (mi=0;mi<h->ngroups_phich;mi++) { // here ngroups is the number of mapping units
for (i=0;i<3;i++) {
li=h->phich_len==PHICH_EXT?i:0; // Step 7
ni=((h->cell_id*n[li]/n[0])+mi+i*n[li]/3) % n[li]; // Step 8
ni=((h->cell.id*n[li]/n[0])+mi+i*n[li]/3) % n[li]; // Step 8
h->phich[mi].regs[i] = regs_phich[li][ni];
h->phich[mi].regs[i]->assigned = true;
INFO("Assigned PHICH REG#%d (%d,%d)\n",nreg,h->phich[mi].regs[i]->k0,li);
@ -265,13 +281,13 @@ int regs_phich_init(regs_t *h) {
// now the number of mapping units = number of groups for normal cp. For extended cp
// ngroups = 2 * number mapping units
if (CP_ISEXT(h->cp)) {
if (CP_ISEXT(h->cell.cp)) {
h->ngroups_phich *= 2;
}
ret = 0;
ret = LIBLTE_SUCCESS;
clean_and_exit:
if (ret == -1) {
if (ret == LIBLTE_ERROR) {
if (h->phich) {
for (i=0;i<h->ngroups_phich;i++) {
if (h->phich[i].regs) {
@ -292,7 +308,7 @@ clean_and_exit:
void regs_phich_free(regs_t *h) {
int i;
if (h->phich) {
if (CP_ISEXT(h->cp)) {
if (CP_ISEXT(h->cell.cp)) {
h->ngroups_phich /= 2;
}
for (i=0;i<h->ngroups_phich;i++) {
@ -304,8 +320,9 @@ void regs_phich_free(regs_t *h) {
}
}
int regs_phich_nregs(regs_t *h) {
int i, n;
u_int16_t regs_phich_nregs(regs_t *h) {
int i;
u_int16_t n;
n=0;
for (i=0;i<h->ngroups_phich;i++) {
n += h->phich[i].nof_regs;
@ -314,7 +331,7 @@ int regs_phich_nregs(regs_t *h) {
}
int regs_phich_ngroups(regs_t *h) {
u_int8_t regs_phich_ngroups(regs_t *h) {
return h->ngroups_phich;
}
@ -325,18 +342,18 @@ int regs_phich_ngroups(regs_t *h) {
*
* Returns the number of written symbols, or -1 on error
*/
int regs_phich_add(regs_t *h, cf_t phich_symbols[REGS_PHICH_NSYM], int ngroup, cf_t *slot_symbols) {
int regs_phich_add(regs_t *h, cf_t phich_symbols[REGS_PHICH_NSYM], u_int8_t ngroup, cf_t *slot_symbols) {
int i;
if (ngroup < 0 || ngroup > h->ngroups_phich) {
if (ngroup >= h->ngroups_phich) {
fprintf(stderr, "Error invalid ngroup %d\n", ngroup);
return -1;
return LIBLTE_ERROR_INVALID_INPUTS;
}
if (CP_ISEXT(h->cp)) {
if (CP_ISEXT(h->cell.cp)) {
ngroup /= 2;
}
regs_ch_t *rch = &h->phich[ngroup];
for (i = 0; i < rch->nof_regs && i*REGS_RE_X_REG < REGS_PHICH_NSYM; i++) {
regs_add_reg(rch->regs[i], &phich_symbols[i*REGS_RE_X_REG], slot_symbols, h->nof_prb);
regs_add_reg(rch->regs[i], &phich_symbols[i*REGS_RE_X_REG], slot_symbols, h->cell.nof_prb);
}
return i*REGS_RE_X_REG;
}
@ -348,19 +365,19 @@ int regs_phich_add(regs_t *h, cf_t phich_symbols[REGS_PHICH_NSYM], int ngroup, c
*/
int regs_phich_reset(regs_t *h, cf_t *slot_symbols) {
int i;
int ngroup, ng;
for (ngroup = 0;ngroup < h->ngroups_phich;CP_ISEXT(h->cp)?ngroup+=2:ngroup++) {
if (CP_ISEXT(h->cp)) {
u_int8_t ngroup, ng;
for (ngroup = 0;ngroup < h->ngroups_phich;CP_ISEXT(h->cell.cp)?ngroup+=2:ngroup++) {
if (CP_ISEXT(h->cell.cp)) {
ng = ngroup/2;
} else {
ng = ngroup;
}
regs_ch_t *rch = &h->phich[ng];
for (i = 0; i < rch->nof_regs && i*REGS_RE_X_REG < REGS_PHICH_NSYM; i++) {
regs_reset_reg(rch->regs[i], slot_symbols, h->nof_prb);
regs_reset_reg(rch->regs[i], slot_symbols, h->cell.nof_prb);
}
}
return 0;
return LIBLTE_SUCCESS;
}
/**
@ -368,18 +385,18 @@ int regs_phich_reset(regs_t *h, cf_t *slot_symbols) {
*
* Returns the number of written symbols, or -1 on error
*/
int regs_phich_get(regs_t *h, cf_t *slot_symbols, cf_t phich_symbols[REGS_PHICH_NSYM], int ngroup) {
int regs_phich_get(regs_t *h, cf_t *slot_symbols, cf_t phich_symbols[REGS_PHICH_NSYM], u_int8_t ngroup) {
int i;
if (ngroup < 0 || ngroup > h->ngroups_phich) {
if (ngroup >= h->ngroups_phich) {
fprintf(stderr, "Error invalid ngroup %d\n", ngroup);
return -1;
return LIBLTE_ERROR_INVALID_INPUTS;
}
if (CP_ISEXT(h->cp)) {
if (CP_ISEXT(h->cell.cp)) {
ngroup /= 2;
}
regs_ch_t *rch = &h->phich[ngroup];
for (i = 0; i < rch->nof_regs && i*REGS_RE_X_REG < REGS_PHICH_NSYM; i++) {
regs_get_reg(rch->regs[i], slot_symbols, &phich_symbols[i*REGS_RE_X_REG], h->nof_prb);
regs_get_reg(rch->regs[i], slot_symbols, &phich_symbols[i*REGS_RE_X_REG], h->cell.nof_prb);
}
return i*REGS_RE_X_REG;
}
@ -404,39 +421,40 @@ int regs_phich_get(regs_t *h, cf_t *slot_symbols, cf_t phich_symbols[REGS_PHICH_
* 36.211 10.3 section 6.7.4
*/
int regs_pcfich_init(regs_t *h) {
int i, k_hat, k;
int i;
uint16_t k_hat, k;
regs_ch_t *ch = &h->pcfich;
ch->regs = malloc(sizeof(regs_reg_t*) * REGS_PCFICH_NREGS);
if (!ch->regs) {
perror("malloc");
return -1;
return LIBLTE_ERROR;
}
ch->nof_regs = REGS_PCFICH_NREGS;
INFO("PCFICH allocating %d regs. CellID: %d, PRB: %d\n", ch->nof_regs, h->cell_id, h->nof_prb);
INFO("PCFICH allocating %d regs. CellID: %d, PRB: %d\n", ch->nof_regs, h->cell.id, h->cell.nof_prb);
k_hat = (RE_X_RB / 2) * (h->cell_id % (2 * h->nof_prb));
k_hat = (RE_X_RB / 2) * (h->cell.id % (2 * h->cell.nof_prb));
for (i = 0; i < REGS_PCFICH_NREGS; i++) {
k = (k_hat + (i * h->nof_prb / 2) * (RE_X_RB / 2))
% (h->nof_prb * RE_X_RB);
k = (k_hat + (i * h->cell.nof_prb / 2) * (RE_X_RB / 2))
% (h->cell.nof_prb * RE_X_RB);
ch->regs[i] = regs_find_reg(h, k, 0);
if (!ch->regs[i]) {
fprintf(stderr, "Error allocating PCFICH: REG (%d,0) not found\n",
k);
return -1;
return LIBLTE_ERROR;
} else if (ch->regs[i]->assigned) {
fprintf(stderr,
"Error allocating PCFICH: REG (%d,0) already allocated\n",
k);
return -1;
return LIBLTE_ERROR;
} else {
ch->regs[i]->assigned = true;
INFO("Assigned PCFICH REG#%d (%d,0)\n", i, k);
}
}
return 0;
return LIBLTE_SUCCESS;
}
void regs_pcfich_free(regs_t *h) {
@ -445,7 +463,7 @@ void regs_pcfich_free(regs_t *h) {
}
}
int regs_pcfich_nregs(regs_t *h) {
uint16_t regs_pcfich_nregs(regs_t *h) {
return h->pcfich.nof_regs;
}
@ -459,7 +477,7 @@ int regs_pcfich_put(regs_t *h, cf_t pcfich_symbols[REGS_PCFICH_NSYM], cf_t *slot
int i;
for (i = 0; i < rch->nof_regs && i*REGS_RE_X_REG < REGS_PCFICH_NSYM; i++) {
regs_put_reg(rch->regs[i], &pcfich_symbols[i*REGS_RE_X_REG], slot_symbols, h->nof_prb);
regs_put_reg(rch->regs[i], &pcfich_symbols[i*REGS_RE_X_REG], slot_symbols, h->cell.nof_prb);
}
return i*REGS_RE_X_REG;
}
@ -473,7 +491,7 @@ int regs_pcfich_get(regs_t *h, cf_t *slot_symbols, cf_t ch_data[REGS_PCFICH_NSYM
regs_ch_t *rch = &h->pcfich;
int i;
for (i = 0; i < rch->nof_regs && i*REGS_RE_X_REG < REGS_PCFICH_NSYM; i++) {
regs_get_reg(rch->regs[i], slot_symbols, &ch_data[i*REGS_RE_X_REG], h->nof_prb);
regs_get_reg(rch->regs[i], slot_symbols, &ch_data[i*REGS_RE_X_REG], h->cell.nof_prb);
}
return i*REGS_RE_X_REG;
}
@ -497,7 +515,7 @@ int regs_pcfich_get(regs_t *h, cf_t *slot_symbols, cf_t ch_data[REGS_PCFICH_NSYM
*
***************************************************************/
regs_reg_t *regs_find_reg(regs_t *h, int k, int l) {
regs_reg_t *regs_find_reg(regs_t *h, uint16_t k, uint8_t l) {
int i;
for (i=0;i<h->nof_regs;i++) {
if (h->regs[i].l == l && h->regs[i].k0 == k) {
@ -511,7 +529,7 @@ regs_reg_t *regs_find_reg(regs_t *h, int k, int l) {
* Returns the number of REGs in a PRB
* 36.211 Section 6.2.4
*/
int regs_num_x_symbol(int symbol, int nof_port, lte_cp_t cp) {
int regs_num_x_symbol(uint8_t symbol, uint8_t nof_port, lte_cp_t cp) {
switch (symbol) {
case 0:
@ -524,7 +542,7 @@ int regs_num_x_symbol(int symbol, int nof_port, lte_cp_t cp) {
case 4:
return 2;
default:
return -1;
return LIBLTE_ERROR;
}
break;
case 2:
@ -536,7 +554,7 @@ int regs_num_x_symbol(int symbol, int nof_port, lte_cp_t cp) {
return 2;
}
default:
return -1;
return LIBLTE_ERROR;
}
}
@ -544,7 +562,7 @@ int regs_num_x_symbol(int symbol, int nof_port, lte_cp_t cp) {
* Initializes the indices of a REG
* 36.211 Section 6.2.4
*/
int regs_reg_init(regs_reg_t *reg, int symbol, int nreg, int k0, int maxreg, int vo) {
int regs_reg_init(regs_reg_t *reg, uint8_t symbol, uint16_t nreg, uint16_t k0, uint8_t maxreg, uint8_t vo) {
int i, j, z;
reg->l = symbol;
@ -570,7 +588,7 @@ int regs_reg_init(regs_reg_t *reg, int symbol, int nreg, int k0, int maxreg, int
}
if (j != 4) {
fprintf(stderr, "Something went wrong: expected 2 references\n");
return -1;
return LIBLTE_ERROR;
}
break;
@ -583,9 +601,9 @@ int regs_reg_init(regs_reg_t *reg, int symbol, int nreg, int k0, int maxreg, int
break;
default:
fprintf(stderr, "Invalid number of REGs per PRB: %d\n", maxreg);
return -1;
return LIBLTE_ERROR;
}
return 0;
return LIBLTE_SUCCESS;
}
void regs_free(regs_t *h) {
@ -601,19 +619,20 @@ void regs_free(regs_t *h) {
/** Sets the CFI value for this subframe (CFI must be in the range 1..3).
*/
int regs_set_cfi(regs_t *h, int cfi) {
int regs_set_cfi(regs_t *h, uint8_t cfi) {
if (cfi > 0 && cfi <= 3) {
if (h->phich_len == PHICH_EXT &&
((h->nof_prb < 10 && cfi < 2) || (h->nof_prb >= 10 && cfi < 3))) {
((h->cell.nof_prb < 10 && cfi < 2) || (h->cell.nof_prb >= 10 && cfi < 3))) {
fprintf(stderr, "PHICH length is extended. The number of control symbols should be at least 3.\n");
return -1;
return LIBLTE_ERROR_INVALID_INPUTS;
} else {
h->cfi_initiated = true;
h->cfi = cfi - 1;
return 0;
return LIBLTE_SUCCESS;
}
} else {
fprintf(stderr, "Invalid CFI %d\n", cfi);
return -1;
return LIBLTE_ERROR_INVALID_INPUTS;
}
}
@ -622,84 +641,87 @@ int regs_set_cfi(regs_t *h, int cfi) {
* Sets all REG indices and initializes PCFICH, PHICH and PDCCH REGs
* Returns 0 if OK, -1 on error
*/
int regs_init(regs_t *h, int cell_id, int nof_prb, int nof_ports,
phich_resources_t phich_res, phich_length_t phich_len, lte_cp_t cp) {
int ret = -1;
int i, j[4], jmax, n[4], prb, k;
int vo = cell_id % 3;
int max_ctrl_symbols = nof_prb<10?4:3;
bzero(h, sizeof(regs_t));
h->cell_id = cell_id;
h->nof_prb = nof_prb;
h->max_ctrl_symbols = max_ctrl_symbols;
h->cfi = -1; // not yet initialized
h->phich_res = phich_res;
h->phich_len = phich_len;
h->cp = cp;
h->nof_ports = nof_ports;
h->nof_regs = 0;
for (i = 0; i < max_ctrl_symbols; i++) {
n[i] = regs_num_x_symbol(i, nof_ports, cp);
if (n[i] == -1) {
return -1;
}
h->nof_regs += nof_prb * n[i];
}
INFO("Indexing %d REGs. CellId: %d, %d PRB, CP: %s\n", h->nof_regs, h->cell_id, h->nof_prb,
CP_ISNORM(cp)?"Normal":"Extended");
h->regs = malloc(sizeof(regs_reg_t) * h->nof_regs);
if (!h->regs) {
perror("malloc");
goto clean_and_exit;
}
int regs_init(regs_t *h, phich_resources_t phich_res, phich_length_t phich_len, lte_cell_t cell) {
int ret = LIBLTE_ERROR_INVALID_INPUTS;
int i, k;
uint16_t j[4], jmax, prb;
uint8_t n[4], vo;
int max_ctrl_symbols;
if (h != NULL &&
lte_cell_isvalid(&cell))
{
bzero(h, sizeof(regs_t));
ret = LIBLTE_ERROR;
max_ctrl_symbols = cell.nof_prb<10?4:3;
vo = cell.id % 3;
h->cell = cell;
h->max_ctrl_symbols = max_ctrl_symbols;
h->cfi_initiated = false;
h->phich_res = phich_res;
h->phich_len = phich_len;
h->nof_regs = 0;
for (i = 0; i < max_ctrl_symbols; i++) {
n[i] = regs_num_x_symbol(i, h->cell.nof_ports, h->cell.cp);
if (n[i] == -1) {
return -1;
}
h->nof_regs += h->cell.nof_prb * n[i];
}
INFO("Indexing %d REGs. CellId: %d, %d PRB, CP: %s\n", h->nof_regs, h->cell.id, h->cell.nof_prb,
CP_ISNORM(h->cell.cp)?"Normal":"Extended");
h->regs = malloc(sizeof(regs_reg_t) * h->nof_regs);
if (!h->regs) {
perror("malloc");
goto clean_and_exit;
}
/* Sort REGs according to PDCCH mapping, beggining from the lowest l index then k */
bzero(j, sizeof(int) * 4);
k = i = prb = jmax = 0;
while (k < h->nof_regs) {
if (n[i] == 3 || (n[i] == 2 && jmax != 1)) {
if (regs_reg_init(&h->regs[k], i, j[i], prb * RE_X_RB, n[i], vo)) {
fprintf(stderr, "Error initializing REGs\n");
goto clean_and_exit;
/* Sort REGs according to PDCCH mapping, beggining from the lowest l index then k */
bzero(j, sizeof(int) * 4);
k = i = prb = jmax = 0;
while (k < h->nof_regs) {
if (n[i] == 3 || (n[i] == 2 && jmax != 1)) {
if (regs_reg_init(&h->regs[k], i, j[i], prb * RE_X_RB, n[i], vo)) {
fprintf(stderr, "Error initializing REGs\n");
goto clean_and_exit;
}
/*DEBUG("Available REG #%3d: l=%d, prb=%d, nreg=%d (k0=%d)\n", k, i, prb, j[i],
h->regs[k].k0);
*/
j[i]++;
k++;
}
i++;
if (i == max_ctrl_symbols) {
i = 0;
jmax++;
}
if (jmax == 3) {
prb++;
bzero(j, sizeof(int) * 4);
jmax = 0;
}
/*DEBUG("Available REG #%3d: l=%d, prb=%d, nreg=%d (k0=%d)\n", k, i, prb, j[i],
h->regs[k].k0);
*/
j[i]++;
k++;
}
i++;
if (i == max_ctrl_symbols) {
i = 0;
jmax++;
if (regs_pcfich_init(h)) {
fprintf(stderr, "Error initializing PCFICH REGs\n");
goto clean_and_exit;
}
if (jmax == 3) {
prb++;
bzero(j, sizeof(int) * 4);
jmax = 0;
if (regs_phich_init(h)) {
fprintf(stderr, "Error initializing PHICH REGs\n");
goto clean_and_exit;
}
if (regs_pdcch_init(h)) {
fprintf(stderr, "Error initializing PDCCH REGs\n");
goto clean_and_exit;
}
}
if (regs_pcfich_init(h)) {
fprintf(stderr, "Error initializing PCFICH REGs\n");
goto clean_and_exit;
}
if (regs_phich_init(h)) {
fprintf(stderr, "Error initializing PHICH REGs\n");
goto clean_and_exit;
ret = LIBLTE_SUCCESS;
}
if (regs_pdcch_init(h)) {
fprintf(stderr, "Error initializing PDCCH REGs\n");
goto clean_and_exit;
}
ret = 0;
clean_and_exit:
if (ret == -1) {
if (ret == LIBLTE_ERROR) {
regs_free(h);
}
return ret;
@ -710,7 +732,7 @@ clean_and_exit:
/**
* Puts one REG data (4 symbols) in the slot symbols array
*/
int regs_put_reg(regs_reg_t *reg, cf_t *reg_data, cf_t *slot_symbols, int nof_prb) {
int regs_put_reg(regs_reg_t *reg, cf_t *reg_data, cf_t *slot_symbols, uint8_t nof_prb) {
int i;
for (i = 0; i < REGS_RE_X_REG; i++) {
slot_symbols[REG_IDX(reg, i, nof_prb)] = reg_data[i];
@ -722,7 +744,7 @@ int regs_put_reg(regs_reg_t *reg, cf_t *reg_data, cf_t *slot_symbols, int nof_pr
* Adds one REG data (4 symbols) in the slot symbols array
* Used by PHICH
*/
int regs_add_reg(regs_reg_t *reg, cf_t *reg_data, cf_t *slot_symbols, int nof_prb) {
int regs_add_reg(regs_reg_t *reg, cf_t *reg_data, cf_t *slot_symbols, uint8_t nof_prb) {
int i;
for (i = 0; i < REGS_RE_X_REG; i++) {
slot_symbols[REG_IDX(reg, i, nof_prb)] += reg_data[i];
@ -734,7 +756,7 @@ int regs_add_reg(regs_reg_t *reg, cf_t *reg_data, cf_t *slot_symbols, int nof_pr
/**
* Reset REG data (4 symbols) in the slot symbols array
*/
int regs_reset_reg(regs_reg_t *reg, cf_t *slot_symbols, int nof_prb) {
int regs_reset_reg(regs_reg_t *reg, cf_t *slot_symbols, uint8_t nof_prb) {
int i;
for (i = 0; i < REGS_RE_X_REG; i++) {
slot_symbols[REG_IDX(reg, i, nof_prb)] = 0;
@ -745,7 +767,7 @@ int regs_reset_reg(regs_reg_t *reg, cf_t *slot_symbols, int nof_prb) {
/**
* Gets one REG data (4 symbols) from the slot symbols array
*/
int regs_get_reg(regs_reg_t *reg, cf_t *slot_symbols, cf_t *reg_data, int nof_prb) {
int regs_get_reg(regs_reg_t *reg, cf_t *slot_symbols, cf_t *reg_data, uint8_t nof_prb) {
int i;
for (i = 0; i < REGS_RE_X_REG; i++) {
reg_data[i] = slot_symbols[REG_IDX(reg, i, nof_prb)];
@ -753,3 +775,4 @@ int regs_get_reg(regs_reg_t *reg, cf_t *slot_symbols, cf_t *reg_data, int nof_pr
return REGS_RE_X_REG;
}

14
lte/phy/lib/phch/src/sequences.c
Unescape Escape View File

@ -33,7 +33,7 @@
/**
* 36.211 6.6.1
*/
int sequence_pbch(sequence_t *seq, lte_cp_t cp, int cell_id) {
int sequence_pbch(sequence_t *seq, lte_cp_t cp, uint16_t cell_id) {
bzero(seq, sizeof(sequence_t));
return sequence_LTEPRS(seq, CP_ISNORM(cp)?1920:1728, cell_id);
}
@ -41,7 +41,7 @@ int sequence_pbch(sequence_t *seq, lte_cp_t cp, int cell_id) {
/**
* 36.211 6.7.1
*/
int sequence_pcfich(sequence_t *seq, int nslot, int cell_id) {
int sequence_pcfich(sequence_t *seq, uint8_t nslot, uint16_t cell_id) {
bzero(seq, sizeof(sequence_t));
return sequence_LTEPRS(seq, 32, (nslot/2+1) * (2*cell_id + 1) * 512 + cell_id);
}
@ -50,7 +50,7 @@ int sequence_pcfich(sequence_t *seq, int nslot, int cell_id) {
/**
* 36.211 6.9.1
*/
int sequence_phich(sequence_t *seq, int nslot, int cell_id) {
int sequence_phich(sequence_t *seq, uint8_t nslot, uint16_t cell_id) {
bzero(seq, sizeof(sequence_t));
return sequence_LTEPRS(seq, 12, (nslot/2+1) * (2*cell_id + 1) * 512 + cell_id);
}
@ -58,7 +58,7 @@ int sequence_phich(sequence_t *seq, int nslot, int cell_id) {
/**
* 36.211 6.8.2
*/
int sequence_pdcch(sequence_t *seq, int nslot, int cell_id, int len) {
int sequence_pdcch(sequence_t *seq, uint8_t nslot, uint16_t cell_id, uint32_t len) {
bzero(seq, sizeof(sequence_t));
return sequence_LTEPRS(seq, len, (nslot/2) * 512 + cell_id);
}
@ -66,7 +66,7 @@ int sequence_pdcch(sequence_t *seq, int nslot, int cell_id, int len) {
/**
* 36.211 6.3.1
*/
int sequence_pdsch(sequence_t *seq, unsigned short rnti, int q, int nslot, int cell_id, int len) {
bzero(seq, sizeof(sequence_t));
return sequence_LTEPRS(seq, len, (rnti<<14) + (q<<13) + ((nslot/2)<<9) + cell_id);
int sequence_pdsch(sequence_t *seq, unsigned short rnti, int q, uint8_t nslot, uint16_t cell_id, uint32_t len) {
bzero(seq, sizeof(sequence_t));
return sequence_LTEPRS(seq, len, (rnti<<14) + (q<<13) + ((nslot/2)<<9) + cell_id);
}

45
lte/phy/lib/phch/test/pbch_file_test.c
Unescape Escape View File

@ -35,13 +35,16 @@
char *input_file_name = NULL;
char *matlab_file_name = NULL;
int cell_id = 150;
lte_cp_t cp = CPNORM;
int nof_prb = 6;
FILE *fmatlab = NULL;
#define NOF_PORTS 2
lte_cell_t cell = {
6, // nof_prb
2, // nof_ports
150, // cell_id
CPNORM // cyclic prefix
};
#define FLEN 9600
filesource_t fsrc;
@ -53,20 +56,22 @@ chest_t chest;
void usage(char *prog) {
printf("Usage: %s [vcoe] -i input_file\n", prog);
printf("\t-o output matlab file name [Default Disabled]\n");
printf("\t-c cell_id [Default %d]\n", cell_id);
printf("\t-c cell_id [Default %d]\n", cell.id);
printf("\t-n nof_prb [Default %d]\n", cell.nof_prb);
printf("\t-e Set extended prefix [Default Normal]\n");
printf("\t-v [set verbose to debug, default none]\n");
}
void parse_args(int argc, char **argv) {
int opt;
while ((opt = getopt(argc, argv, "iovce")) != -1) {
switch(opt) {
case 'i':
input_file_name = argv[optind];
break;
case 'c':
cell_id = atoi(argv[optind]);
cell.id = atoi(argv[optind]);
break;
case 'o':
matlab_file_name = argv[optind];
@ -75,7 +80,7 @@ void parse_args(int argc, char **argv) {
verbose++;
break;
case 'e':
cp = CPEXT;
cell.cp = CPEXT;
break;
default:
usage(argv[0]);
@ -112,36 +117,36 @@ int base_init() {
exit(-1);
}
fft_buffer = malloc(CP_NSYMB(cp) * nof_prb * RE_X_RB * sizeof(cf_t));
fft_buffer = malloc(CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB * sizeof(cf_t));
if (!fft_buffer) {
perror("malloc");
return -1;
}
for (i=0;i<MAX_PORTS;i++) {
ce[i] = malloc(CP_NSYMB(cp) * nof_prb * RE_X_RB * sizeof(cf_t));
ce[i] = malloc(CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB * sizeof(cf_t));
if (!ce[i]) {
perror("malloc");
return -1;
}
}
if (chest_init(&chest, LINEAR, cp, nof_prb, NOF_PORTS)) {
fprintf(stderr, "Error initializing equalizer\n");
if (!lte_cell_isvalid(&cell)) {
fprintf(stderr, "Invalid cell properties\n");
return -1;
}
if (chest_ref_LTEDL(&chest, cell_id)) {
fprintf(stderr, "Error initializing reference signal\n");
if (chest_init_LTEDL(&chest, LINEAR, cell)) {
fprintf(stderr, "Error initializing equalizer\n");
return -1;
}
if (lte_fft_init(&fft, cp, nof_prb)) {
if (lte_fft_init(&fft, cell.cp, cell.nof_prb)) {
fprintf(stderr, "Error initializing FFT\n");
return -1;
}
if (pbch_init(&pbch, nof_prb, cell_id, cp)) {
if (pbch_init(&pbch, cell.nof_prb, cell.id, cell.cp)) {
fprintf(stderr, "Error initiating PBCH\n");
return -1;
}
@ -183,7 +188,7 @@ int main(int argc, char **argv) {
parse_args(argc,argv);
if (base_init()) {
fprintf(stderr, "Error initializing memory\n");
fprintf(stderr, "Error initializing receiver\n");
exit(-1);
}
@ -193,14 +198,14 @@ int main(int argc, char **argv) {
if (fmatlab) {
fprintf(fmatlab, "outfft=");
vec_sc_prod_cfc(fft_buffer, 1000.0, fft_buffer, CP_NSYMB(cp) * nof_prb * RE_X_RB);
vec_fprint_c(fmatlab, fft_buffer, CP_NSYMB(cp) * nof_prb * RE_X_RB);
vec_sc_prod_cfc(fft_buffer, 1000.0, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
vec_fprint_c(fmatlab, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
fprintf(fmatlab, ";\n");
vec_sc_prod_cfc(fft_buffer, 0.001, fft_buffer, CP_NSYMB(cp) * nof_prb * RE_X_RB);
vec_sc_prod_cfc(fft_buffer, 0.001, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
}
/* Get channel estimates for each port */
for (i=0;i<NOF_PORTS;i++) {
for (i=0;i<cell.nof_ports;i++) {
chest_ce_slot_port(&chest, fft_buffer, ce[i], 1, i);
if (fmatlab) {
chest_fprint(&chest, fmatlab, 1, i);

60
lte/phy/lib/phch/test/pcfich_file_test.c
Unescape Escape View File

@ -35,10 +35,15 @@
char *input_file_name = NULL;
char *matlab_file_name = NULL;
int cell_id = 0;
lte_cp_t cp = CPNORM;
int nof_prb = 6;
int nof_ports = 1;
lte_cell_t cell = {
6, // nof_prb
1, // nof_ports
0, // cell_id
CPNORM // cyclic prefix
};
int flen;
FILE *fmatlab = NULL;
@ -53,9 +58,9 @@ chest_t chest;
void usage(char *prog) {
printf("Usage: %s [vcoe] -i input_file\n", prog);
printf("\t-o output matlab file name [Default Disabled]\n");
printf("\t-c cell_id [Default %d]\n", cell_id);
printf("\t-p nof_ports [Default %d]\n", nof_ports);
printf("\t-n nof_prb [Default %d]\n", nof_prb);
printf("\t-c cell.id [Default %d]\n", cell.id);
printf("\t-p cell.nof_ports [Default %d]\n", cell.nof_ports);
printf("\t-n cell.nof_prb [Default %d]\n", cell.nof_prb);
printf("\t-e Set extended prefix [Default Normal]\n");
printf("\t-v [set verbose to debug, default none]\n");
}
@ -68,13 +73,13 @@ void parse_args(int argc, char **argv) {
input_file_name = argv[optind];
break;
case 'c':
cell_id = atoi(argv[optind]);
cell.id = atoi(argv[optind]);
break;
case 'n':
nof_prb = atoi(argv[optind]);
cell.nof_prb = atoi(argv[optind]);
break;
case 'p':
nof_ports = atoi(argv[optind]);
cell.nof_ports = atoi(argv[optind]);
break;
case 'o':
matlab_file_name = argv[optind];
@ -83,7 +88,7 @@ void parse_args(int argc, char **argv) {
verbose++;
break;
case 'e':
cp = CPEXT;
cell.cp = CPEXT;
break;
default:
usage(argv[0]);
@ -114,7 +119,7 @@ int base_init() {
fmatlab = NULL;
}
flen = SLOT_LEN(lte_symbol_sz(nof_prb), cp);
flen = SLOT_LEN(lte_symbol_sz(cell.nof_prb), cell.cp);
input_buffer = malloc(flen * sizeof(cf_t));
if (!input_buffer) {
@ -122,41 +127,36 @@ int base_init() {
exit(-1);
}
fft_buffer = malloc(CP_NSYMB(cp) * nof_prb * RE_X_RB * sizeof(cf_t));
fft_buffer = malloc(CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB * sizeof(cf_t));
if (!fft_buffer) {
perror("malloc");
return -1;
}
for (i=0;i<MAX_PORTS;i++) {
ce[i] = malloc(CP_NSYMB(cp) * nof_prb * RE_X_RB * sizeof(cf_t));
ce[i] = malloc(CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB * sizeof(cf_t));
if (!ce[i]) {
perror("malloc");
return -1;
}
}
if (chest_init(&chest, LINEAR, cp, nof_prb, nof_ports)) {
if (chest_init_LTEDL(&chest, LINEAR, cell)) {
fprintf(stderr, "Error initializing equalizer\n");
return -1;
}
if (chest_ref_LTEDL(&chest, cell_id)) {
fprintf(stderr, "Error initializing reference signal\n");
return -1;
}
if (lte_fft_init(&fft, cp, nof_prb)) {
if (lte_fft_init(&fft, cell.cp, cell.nof_prb)) {
fprintf(stderr, "Error initializing FFT\n");
return -1;
}
if (regs_init(&regs, cell_id, nof_prb, nof_ports, R_1, PHICH_NORM, cp)) {
fprintf(stderr, "Error initiating regs\n");
if (regs_init(&regs, R_1, PHICH_NORM, cell)) {
fprintf(stderr, "Error initiating REGs\n");
return -1;
}
if (pcfich_init(&pcfich, &regs, cell_id, nof_prb, nof_ports, cp)) {
if (pcfich_init(&pcfich, &regs, cell)) {
fprintf(stderr, "Error creating PBCH object\n");
return -1;
}
@ -188,7 +188,7 @@ void base_free() {
}
int main(int argc, char **argv) {
int cfi, distance;
uint8_t cfi, distance;
int i, n;
if (argc < 3) {
@ -199,7 +199,7 @@ int main(int argc, char **argv) {
parse_args(argc,argv);
if (base_init()) {
fprintf(stderr, "Error initializing memory\n");
fprintf(stderr, "Error initializing receiver\n");
exit(-1);
}
@ -213,14 +213,14 @@ int main(int argc, char **argv) {
fprintf(fmatlab, ";\n");
fprintf(fmatlab, "outfft=");
vec_sc_prod_cfc(fft_buffer, 1000.0, fft_buffer, CP_NSYMB(cp) * nof_prb * RE_X_RB);
vec_fprint_c(fmatlab, fft_buffer, CP_NSYMB(cp) * nof_prb * RE_X_RB);
vec_sc_prod_cfc(fft_buffer, 1000.0, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
vec_fprint_c(fmatlab, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
fprintf(fmatlab, ";\n");
vec_sc_prod_cfc(fft_buffer, 0.001, fft_buffer, CP_NSYMB(cp) * nof_prb * RE_X_RB);
vec_sc_prod_cfc(fft_buffer, 0.001, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
}
/* Get channel estimates for each port */
for (i=0;i<nof_ports;i++) {
for (i=0;i<cell.nof_ports;i++) {
chest_ce_slot_port(&chest, fft_buffer, ce[i], 0, i);
if (fmatlab) {
chest_fprint(&chest, fmatlab, 0, i);

39
lte/phy/lib/phch/test/pcfich_test.c
Unescape Escape View File

@ -33,15 +33,19 @@
#include "liblte/phy/phy.h"
int cell_id = -1;
int nof_prb = 6;
int nof_ports = 1;
lte_cell_t cell = {
6, // nof_prb
1, // nof_ports
1000, // cell_id
CPNORM // cyclic prefix
};
void usage(char *prog) {
printf("Usage: %s [cpv]\n", prog);
printf("\t-c cell id [Default %d]\n", cell_id);
printf("\t-p nof_ports [Default %d]\n", nof_ports);
printf("\t-n nof_prb [Default %d]\n", nof_prb);
printf("\t-c cell id [Default %d]\n", cell.id);
printf("\t-p nof_ports [Default %d]\n", cell.nof_ports);
printf("\t-n nof_prb [Default %d]\n", cell.nof_prb);
printf("\t-v [set verbose to debug, default none]\n");
}
@ -50,13 +54,13 @@ void parse_args(int argc, char **argv) {
while ((opt = getopt(argc, argv, "cpnv")) != -1) {
switch(opt) {
case 'p':
nof_ports = atoi(argv[optind]);
cell.nof_ports = atoi(argv[optind]);
break;
case 'n':
nof_prb = atoi(argv[optind]);
cell.nof_prb = atoi(argv[optind]);
break;
case 'c':
cell_id = atoi(argv[optind]);
cell.id = atoi(argv[optind]);
break;
case 'v':
verbose++;
@ -76,12 +80,12 @@ int main(int argc, char **argv) {
cf_t *ce[MAX_PORTS];
int nof_re;
cf_t *slot_symbols[MAX_PORTS];
int cfi, cfi_rx, nsf, distance;
uint8_t cfi, cfi_rx, nsf, distance;
int cid, max_cid;
parse_args(argc,argv);
nof_re = CPNORM_NSYMB * nof_prb * RE_X_RB;
nof_re = CPNORM_NSYMB * cell.nof_prb * RE_X_RB;
/* init memory */
for (i=0;i<MAX_PORTS;i++) {
@ -100,23 +104,24 @@ int main(int argc, char **argv) {
}
}
if (cell_id == -1) {
if (cell.id == 1000) {
cid = 0;
max_cid = 503;
} else {
cid = cell_id;
max_cid = cell_id;
cid = cell.id;
max_cid = cell.id;
}
while(cid <= max_cid) {
cell.id = cid;
printf("Testing CellID=%d...\n", cid);
if (regs_init(&regs, cid, nof_prb, nof_ports, R_1, PHICH_NORM, CPNORM)) {
if (regs_init(&regs, R_1, PHICH_NORM, cell)) {
fprintf(stderr, "Error initiating regs\n");
exit(-1);
}
if (pcfich_init(&pcfich, &regs, cid, nof_prb, nof_ports, CPNORM)) {
if (pcfich_init(&pcfich, &regs, cell)) {
fprintf(stderr, "Error creating PBCH object\n");
exit(-1);
}
@ -126,7 +131,7 @@ int main(int argc, char **argv) {
pcfich_encode(&pcfich, cfi, slot_symbols, nsf);
/* combine outputs */
for (i=1;i<nof_ports;i++) {
for (i=1;i<cell.nof_ports;i++) {
for (j=0;j<nof_re;j++) {
slot_symbols[0][j] += slot_symbols[i][j];
}

74
lte/phy/lib/phch/test/pdcch_file_test.c
Unescape Escape View File

@ -35,13 +35,18 @@
char *input_file_name = NULL;
char *matlab_file_name = NULL;
int cell_id = 0;
int cfi = 2;
lte_cp_t cp = CPNORM;
int nof_prb = 6;
int nof_ports = 1;
lte_cell_t cell = {
6, // cell.cell.cell.nof_prb
1, // cell.cell.nof_ports
0, // cell.id
CPNORM // cyclic prefix
};
uint8_t cfi = 2;
int flen;
unsigned short rnti = SIRNTI;
uint16_t rnti = SIRNTI;
int max_frames = 10;
FILE *fmatlab = NULL;
@ -56,11 +61,11 @@ dci_t dci_rx;
void usage(char *prog) {
printf("Usage: %s [vcfoe] -i input_file\n", prog);
printf("\t-o output matlab file name [Default Disabled]\n");
printf("\t-c cell_id [Default %d]\n", cell_id);
printf("\t-c cell.id [Default %d]\n", cell.id);
printf("\t-f cfi [Default %d]\n", cfi);
printf("\t-r rnti [Default SI-RNTI]\n");
printf("\t-p nof_ports [Default %d]\n", nof_ports);
printf("\t-n nof_prb [Default %d]\n", nof_prb);
printf("\t-p cell.nof_ports [Default %d]\n", cell.nof_ports);
printf("\t-n cell.nof_prb [Default %d]\n", cell.nof_prb);
printf("\t-m max_frames [Default %d]\n", max_frames);
printf("\t-e Set extended prefix [Default Normal]\n");
printf("\t-v [set verbose to debug, default none]\n");
@ -74,7 +79,7 @@ void parse_args(int argc, char **argv) {
input_file_name = argv[optind];
break;
case 'c':
cell_id = atoi(argv[optind]);
cell.id = atoi(argv[optind]);
break;
case 'r':
rnti = strtoul(argv[optind], NULL, 0);
@ -86,10 +91,10 @@ void parse_args(int argc, char **argv) {
cfi = atoi(argv[optind]);
break;
case 'n':
nof_prb = atoi(argv[optind]);
cell.nof_prb = atoi(argv[optind]);
break;
case 'p':
nof_ports = atoi(argv[optind]);
cell.nof_ports = atoi(argv[optind]);
break;
case 'o':
matlab_file_name = argv[optind];
@ -98,7 +103,7 @@ void parse_args(int argc, char **argv) {
verbose++;
break;
case 'e':
cp = CPEXT;
cell.cp = CPEXT;
break;
default:
usage(argv[0]);
@ -129,7 +134,7 @@ int base_init() {
fmatlab = NULL;
}
flen = 2 * (SLOT_LEN(lte_symbol_sz(nof_prb), cp));
flen = 2 * (SLOT_LEN(lte_symbol_sz(cell.nof_prb), cell.cp));
input_buffer = malloc(flen * sizeof(cf_t));
if (!input_buffer) {
@ -137,36 +142,31 @@ int base_init() {
exit(-1);
}
fft_buffer = malloc(CP_NSYMB(cp) * nof_prb * RE_X_RB * sizeof(cf_t));
fft_buffer = malloc(CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB * sizeof(cf_t));
if (!fft_buffer) {
perror("malloc");
return -1;
}
for (i=0;i<MAX_PORTS;i++) {
ce[i] = malloc(CP_NSYMB(cp) * nof_prb * RE_X_RB * sizeof(cf_t));
ce[i] = malloc(CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB * sizeof(cf_t));
if (!ce[i]) {
perror("malloc");
return -1;
}
}
if (chest_init(&chest, LINEAR, cp, nof_prb, nof_ports)) {
if (chest_init_LTEDL(&chest, LINEAR, cell)) {
fprintf(stderr, "Error initializing equalizer\n");
return -1;
}
if (chest_ref_LTEDL(&chest, cell_id)) {
fprintf(stderr, "Error initializing reference signal\n");
return -1;
}
if (lte_fft_init(&fft, cp, nof_prb)) {
if (lte_fft_init(&fft, cell.cp, cell.nof_prb)) {
fprintf(stderr, "Error initializing FFT\n");
return -1;
}
if (regs_init(&regs, cell_id, nof_prb, nof_ports, R_1, PHICH_NORM, cp)) {
if (regs_init(&regs, R_1, PHICH_NORM, cell)) {
fprintf(stderr, "Error initiating regs\n");
return -1;
}
@ -175,14 +175,10 @@ int base_init() {
fprintf(stderr, "Error setting CFI %d\n", cfi);
return -1;
}
if (pdcch_init(&pdcch, &regs, nof_prb, nof_ports, cell_id, cp)) {
if (pdcch_init(&pdcch, &regs, cell)) {
fprintf(stderr, "Error creating PDCCH object\n");
exit(-1);
}
if (pdcch_set_cfi(&pdcch, cfi)) {
fprintf(stderr, "Error setting CFI %d\n", cfi);
return -1;
}
dci_init(&dci_rx, 10);
@ -234,10 +230,10 @@ int main(int argc, char **argv) {
if (rnti == SIRNTI) {
INFO("Initializing common search space for SI-RNTI\n",0);
pdcch_init_search_si(&pdcch);
pdcch_init_search_si(&pdcch, cfi);
} else {
INFO("Initializing user-specific search space for RNTI: 0x%x\n", rnti);
pdcch_init_search_ue(&pdcch, rnti);
pdcch_init_search_ue(&pdcch, rnti, cfi);
}
ret = -1;
nof_frames = 0;
@ -254,27 +250,27 @@ int main(int argc, char **argv) {
fprintf(fmatlab, ";\n");
fprintf(fmatlab, "outfft%d=", nof_frames);
vec_sc_prod_cfc(fft_buffer, 1000.0, fft_buffer, CP_NSYMB(cp) * nof_prb * RE_X_RB);
vec_fprint_c(fmatlab, fft_buffer, CP_NSYMB(cp) * nof_prb * RE_X_RB);
vec_sc_prod_cfc(fft_buffer, 1000.0, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
vec_fprint_c(fmatlab, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
fprintf(fmatlab, ";\n");
vec_sc_prod_cfc(fft_buffer, 0.001, fft_buffer, CP_NSYMB(cp) * nof_prb * RE_X_RB);
vec_sc_prod_cfc(fft_buffer, 0.001, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
}
/* Get channel estimates for each port */
for (i=0;i<nof_ports;i++) {
for (i=0;i<cell.nof_ports;i++) {
chest_ce_slot_port(&chest, fft_buffer, ce[i], 2*nof_frames, i);
if (fmatlab) {
chest_fprint(&chest, fmatlab, 2*nof_frames, i);
}
}
nof_dcis = pdcch_decode(&pdcch, fft_buffer, ce, &dci_rx, nof_frames%10);
nof_dcis = pdcch_decode(&pdcch, fft_buffer, ce, &dci_rx, nof_frames%10, cfi);
INFO("Received %d DCI messages\n", nof_dcis);
for (i=0;i<nof_dcis;i++) {
dci_msg_type_t type;
if (dci_msg_get_type(&dci_rx.msg[i], &type, nof_prb, 1234)) {
if (dci_msg_get_type(&dci_rx.msg[i], &type, cell.nof_prb, 1234)) {
fprintf(stderr, "Can't get DCI message type\n");
exit(-1);
}
@ -283,10 +279,10 @@ int main(int argc, char **argv) {
switch(type.type) {
case PDSCH_SCHED:
bzero(&ra_dl, sizeof(ra_pdsch_t));
if (dci_msg_unpack_pdsch(&dci_rx.msg[i], &ra_dl, nof_prb, rnti != SIRNTI)) {
if (dci_msg_unpack_pdsch(&dci_rx.msg[i], &ra_dl, cell.nof_prb, rnti != SIRNTI)) {
fprintf(stderr, "Can't unpack PDSCH message\n");
} else {
ra_pdsch_fprint(stdout, &ra_dl, nof_prb);
ra_pdsch_fprint(stdout, &ra_dl, cell.nof_prb);
if (ra_dl.alloc_type == alloc_type2 && ra_dl.type2_alloc.mode == t2_loc
&& ra_dl.type2_alloc.riv == 11 && ra_dl.rv_idx == 0
&& ra_dl.harq_process == 0 && ra_dl.mcs.mcs_idx == 2) {

51
lte/phy/lib/phch/test/pdcch_test.c
Unescape Escape View File

@ -33,35 +33,39 @@
#include "liblte/phy/phy.h"
int cell_id = 1;
int nof_prb = 6;
int nof_ports = 1;
int cfi = 1;
lte_cell_t cell = {
6, // nof_prb
1, // nof_ports
1, // cell_id
CPNORM // cyclic prefix
};
uint8_t cfi = 1;
void usage(char *prog) {
printf("Usage: %s [cpv]\n", prog);
printf("\t-c cell id [Default %d]\n", cell_id);
printf("Usage: %s [cell.cpv]\n", prog);
printf("\t-c cell id [Default %d]\n", cell.id);
printf("\t-f cfi [Default %d]\n", cfi);
printf("\t-p nof_ports [Default %d]\n", nof_ports);
printf("\t-n nof_prb [Default %d]\n", nof_prb);
printf("\t-p cell.nof_ports [Default %d]\n", cell.nof_ports);
printf("\t-n cell.nof_prb [Default %d]\n", cell.nof_prb);
printf("\t-v [set verbose to debug, default none]\n");
}
void parse_args(int argc, char **argv) {
int opt;
while ((opt = getopt(argc, argv, "cpnfv")) != -1) {
while ((opt = getopt(argc, argv, "cell.cpnfv")) != -1) {
switch (opt) {
case 'p':
nof_ports = atoi(argv[optind]);
cell.nof_ports = atoi(argv[optind]);
break;
case 'f':
cfi = atoi(argv[optind]);
break;
case 'n':
nof_prb = atoi(argv[optind]);
cell.nof_prb = atoi(argv[optind]);
break;
case 'c':
cell_id = atoi(argv[optind]);
cell.id = atoi(argv[optind]);
break;
case 'v':
verbose++;
@ -113,7 +117,7 @@ int main(int argc, char **argv) {
parse_args(argc, argv);
nof_re = CPNORM_NSYMB * nof_prb * RE_X_RB;
nof_re = CPNORM_NSYMB * cell.nof_prb * RE_X_RB;
if (test_dci_payload_size()) {
exit(-1);
@ -136,7 +140,7 @@ int main(int argc, char **argv) {
}
}
if (regs_init(&regs, cell_id, nof_prb, nof_ports, R_1, PHICH_NORM, CPNORM)) {
if (regs_init(&regs, R_1, PHICH_NORM, cell)) {
fprintf(stderr, "Error initiating regs\n");
exit(-1);
}
@ -146,15 +150,10 @@ int main(int argc, char **argv) {
exit(-1);
}
if (pdcch_init(&pdcch, &regs, nof_prb, nof_ports, cell_id, CPNORM)) {
if (pdcch_init(&pdcch, &regs, cell)) {
fprintf(stderr, "Error creating PDCCH object\n");
exit(-1);
}
if (pdcch_set_cfi(&pdcch, cfi)) {
fprintf(stderr, "Error setting CFI %d\n", cfi);
return -1;
}
dci_init(&dci_tx, 2);
bzero(&ra_dl, sizeof(ra_pdsch_t));
@ -166,28 +165,28 @@ int main(int argc, char **argv) {
ra_dl.alloc_type = alloc_type0;
ra_dl.type0_alloc.rbg_bitmask = 0x5;
dci_msg_pack_pdsch(&ra_dl, &dci_tx.msg[0], Format1, nof_prb, false);
dci_msg_pack_pdsch(&ra_dl, &dci_tx.msg[0], Format1, cell.nof_prb, false);
dci_msg_candidate_set(&dci_tx.msg[0], 0, 0, 1234);
dci_tx.nof_dcis++;
ra_pdsch_set_mcs(&ra_dl, QAM16, 15);
dci_msg_pack_pdsch(&ra_dl, &dci_tx.msg[1], Format1, nof_prb, false);
dci_msg_pack_pdsch(&ra_dl, &dci_tx.msg[1], Format1, cell.nof_prb, false);
dci_msg_candidate_set(&dci_tx.msg[1], 0, 1, 1234);
dci_tx.nof_dcis++;
pdcch_encode(&pdcch, &dci_tx, slot_symbols, 0);
pdcch_encode(&pdcch, &dci_tx, slot_symbols, 0, cfi);
/* combine outputs */
for (i = 1; i < nof_ports; i++) {
for (i = 1; i < cell.nof_ports; i++) {
for (j = 0; j < nof_re; j++) {
slot_symbols[0][j] += slot_symbols[i][j];
}
}
pdcch_init_search_ue(&pdcch, 1234);
pdcch_init_search_ue(&pdcch, 1234, cfi);
dci_init(&dci_rx, 2);
nof_dcis = pdcch_decode(&pdcch, slot_symbols[0], ce, &dci_rx, 0);
nof_dcis = pdcch_decode(&pdcch, slot_symbols[0], ce, &dci_rx, 0, cfi);
if (nof_dcis < 0) {
printf("Error decoding\n");
} else if (nof_dcis == dci_tx.nof_dcis) {

90
lte/phy/lib/phch/test/pdsch_file_test.c
Unescape Escape View File

@ -35,13 +35,19 @@
char *input_file_name = NULL;
char *matlab_file_name = NULL;
int cell_id = 0;
int cfi = 2;
lte_cp_t cp = CPNORM;
int nof_prb = 6;
int nof_ports = 1;
lte_cell_t cell = {
6, // nof_prb
1, // nof_ports
0, // cell_id
CPNORM // cyclic prefix
};
int flen;
unsigned short rnti = SIRNTI;
uint8_t cfi = 2;
uint16_t rnti = SIRNTI;
int max_frames = 10;
FILE *fmatlab = NULL;
@ -57,11 +63,11 @@ dci_t dci_rx;
void usage(char *prog) {
printf("Usage: %s [vcfoe] -i input_file\n", prog);
printf("\t-o output matlab file name [Default Disabled]\n");
printf("\t-c cell_id [Default %d]\n", cell_id);
printf("\t-c cell.id [Default %d]\n", cell.id);
printf("\t-f cfi [Default %d]\n", cfi);
printf("\t-r rnti [Default SI-RNTI]\n");
printf("\t-p nof_ports [Default %d]\n", nof_ports);
printf("\t-n nof_prb [Default %d]\n", nof_prb);
printf("\t-p cell.nof_ports [Default %d]\n", cell.nof_ports);
printf("\t-n cell.nof_prb [Default %d]\n", cell.nof_prb);
printf("\t-m max_frames [Default %d]\n", max_frames);
printf("\t-e Set extended prefix [Default Normal]\n");
printf("\t-v [set verbose to debug, default none]\n");
@ -75,7 +81,7 @@ void parse_args(int argc, char **argv) {
input_file_name = argv[optind];
break;
case 'c':
cell_id = atoi(argv[optind]);
cell.id = atoi(argv[optind]);
break;
case 'r':
rnti = strtoul(argv[optind], NULL, 0);
@ -87,10 +93,10 @@ void parse_args(int argc, char **argv) {
cfi = atoi(argv[optind]);
break;
case 'n':
nof_prb = atoi(argv[optind]);
cell.nof_prb = atoi(argv[optind]);
break;
case 'p':
nof_ports = atoi(argv[optind]);
cell.nof_ports = atoi(argv[optind]);
break;
case 'o':
matlab_file_name = argv[optind];
@ -99,7 +105,7 @@ void parse_args(int argc, char **argv) {
verbose++;
break;
case 'e':
cp = CPEXT;
cell.cp = CPEXT;
break;
default:
usage(argv[0]);
@ -130,7 +136,7 @@ int base_init() {
fmatlab = NULL;
}
flen = 2 * (SLOT_LEN(lte_symbol_sz(nof_prb), cp));
flen = 2 * (SLOT_LEN(lte_symbol_sz(cell.nof_prb), cell.cp));
input_buffer = malloc(flen * sizeof(cf_t));
if (!input_buffer) {
@ -138,36 +144,31 @@ int base_init() {
exit(-1);
}
fft_buffer = malloc(2 * CP_NSYMB(cp) * nof_prb * RE_X_RB * sizeof(cf_t));
fft_buffer = malloc(2 * CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB * sizeof(cf_t));
if (!fft_buffer) {
perror("malloc");
return -1;
}
for (i=0;i<MAX_PORTS;i++) {
ce[i] = malloc(2 * CP_NSYMB(cp) * nof_prb * RE_X_RB * sizeof(cf_t));
ce[i] = malloc(2 * CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB * sizeof(cf_t));
if (!ce[i]) {
perror("malloc");
return -1;
}
}
if (chest_init(&chest, LINEAR, cp, nof_prb, nof_ports)) {
if (chest_init_LTEDL(&chest, LINEAR, cell)) {
fprintf(stderr, "Error initializing equalizer\n");
return -1;
}
if (chest_ref_LTEDL(&chest, cell_id)) {
fprintf(stderr, "Error initializing reference signal\n");
return -1;
}
if (lte_fft_init(&fft, cp, nof_prb)) {
if (lte_fft_init(&fft, cell.cp, cell.nof_prb)) {
fprintf(stderr, "Error initializing FFT\n");
return -1;
}
if (regs_init(&regs, cell_id, nof_prb, nof_ports, R_1, PHICH_NORM, cp)) {
if (regs_init(&regs, R_1, PHICH_NORM, cell)) {
fprintf(stderr, "Error initiating regs\n");
return -1;
}
@ -177,19 +178,15 @@ int base_init() {
return -1;
}
if (pdcch_init(&pdcch, &regs, nof_prb, nof_ports, cell_id, cp)) {
if (pdcch_init(&pdcch, &regs, cell)) {
fprintf(stderr, "Error creating PDCCH object\n");
exit(-1);
}
if (pdcch_set_cfi(&pdcch, cfi)) {
fprintf(stderr, "Error setting CFI %d\n", cfi);
return -1;
}
dci_init(&dci_rx, 10);
if (pdsch_init(&pdsch, rnti, nof_prb, nof_ports, cell_id, cp)) {
fprintf(stderr, "Error creating PDCCH object\n");
if (pdsch_init(&pdsch, rnti, cell)) {
fprintf(stderr, "Error creating PDSCH object\n");
exit(-1);
}
@ -246,10 +243,10 @@ int main(int argc, char **argv) {
if (rnti == SIRNTI) {
INFO("Initializing common search space for SI-RNTI\n",0);
pdcch_init_search_si(&pdcch);
pdcch_init_search_si(&pdcch, cfi);
} else {
INFO("Initializing user-specific search space for RNTI: 0x%x\n", rnti);
pdcch_init_search_ue(&pdcch, rnti);
pdcch_init_search_ue(&pdcch, rnti, cfi);
}
ret = -1;
nof_frames = 0;
@ -258,8 +255,7 @@ int main(int argc, char **argv) {
if (nof_frames == 5) {
INFO("Reading %d samples sub-frame %d\n", flen, nof_frames);
lte_fft_run_slot(&fft, input_buffer, fft_buffer);
lte_fft_run_slot(&fft, &input_buffer[flen/2], &fft_buffer[CP_NSYMB(cp) * nof_prb * RE_X_RB]);
lte_fft_run_sf(&fft, input_buffer, fft_buffer);
if (fmatlab) {
fprintf(fmatlab, "infft%d=", nof_frames);
@ -267,29 +263,29 @@ int main(int argc, char **argv) {
fprintf(fmatlab, ";\n");
fprintf(fmatlab, "outfft%d=", nof_frames);
vec_sc_prod_cfc(fft_buffer, 1000.0, fft_buffer, CP_NSYMB(cp) * nof_prb * RE_X_RB);
vec_fprint_c(fmatlab, fft_buffer, CP_NSYMB(cp) * nof_prb * RE_X_RB);
vec_sc_prod_cfc(fft_buffer, 1000.0, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
vec_fprint_c(fmatlab, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
fprintf(fmatlab, ";\n");
vec_sc_prod_cfc(fft_buffer, 0.001, fft_buffer, CP_NSYMB(cp) * nof_prb * RE_X_RB);
vec_sc_prod_cfc(fft_buffer, 0.001, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
}
/* Get channel estimates for each port */
for (i=0;i<nof_ports;i++) {
for (i=0;i<cell.nof_ports;i++) {
chest_ce_slot_port(&chest, fft_buffer, ce[i], 2*nof_frames, i);
chest_ce_slot_port(&chest, &fft_buffer[CP_NSYMB(cp) * nof_prb * RE_X_RB],
&ce[i][CP_NSYMB(cp) * nof_prb * RE_X_RB], 2*nof_frames+1, i);
chest_ce_slot_port(&chest, &fft_buffer[CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB],
&ce[i][CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB], 2*nof_frames+1, i);
if (fmatlab) {
chest_fprint(&chest, fmatlab, 2*nof_frames+1, i);
}
}
nof_dcis = pdcch_decode(&pdcch, fft_buffer, ce, &dci_rx, nof_frames%10);
nof_dcis = pdcch_decode(&pdcch, fft_buffer, ce, &dci_rx, nof_frames%10, cfi);
INFO("Received %d DCI messages\n", nof_dcis);
for (i=0;i<nof_dcis;i++) {
dci_msg_type_t type;
if (dci_msg_get_type(&dci_rx.msg[i], &type, nof_prb, 1234)) {
if (dci_msg_get_type(&dci_rx.msg[i], &type, cell.nof_prb, 1234)) {
fprintf(stderr, "Can't get DCI message type\n");
goto goout;
}
@ -298,10 +294,10 @@ int main(int argc, char **argv) {
switch(type.type) {
case PDSCH_SCHED:
bzero(&ra_dl, sizeof(ra_pdsch_t));
if (dci_msg_unpack_pdsch(&dci_rx.msg[i], &ra_dl, nof_prb, rnti != SIRNTI)) {
if (dci_msg_unpack_pdsch(&dci_rx.msg[i], &ra_dl, cell.nof_prb, rnti != SIRNTI)) {
fprintf(stderr, "Can't unpack PDSCH message\n");
} else {
ra_pdsch_fprint(stdout, &ra_dl, nof_prb);
ra_pdsch_fprint(stdout, &ra_dl, cell.nof_prb);
if (ra_dl.alloc_type == alloc_type2 && ra_dl.type2_alloc.mode == t2_loc
&& ra_dl.type2_alloc.riv == 11 && ra_dl.rv_idx == 0
&& ra_dl.harq_process == 0 && ra_dl.mcs.mcs_idx == 2) {
@ -314,11 +310,11 @@ int main(int argc, char **argv) {
fprintf(stderr, "Unsupported message type\n");
break;
}
if (ra_prb_get_dl(&prb_alloc, &ra_dl, nof_prb)) {
if (ra_prb_get_dl(&prb_alloc, &ra_dl, cell.nof_prb)) {
fprintf(stderr, "Error computing resource allocation\n");
goto goout;
}
ra_prb_get_re(&prb_alloc, nof_prb, nof_ports, nof_prb<10?(cfi+1):cfi, cp);
ra_prb_get_re(&prb_alloc, cell.nof_prb, cell.nof_ports, cell.nof_prb<10?(cfi+1):cfi, cell.cp);
if (pdsch_decode(&pdsch, fft_buffer, ce, data, nof_frames%10, ra_dl.mcs, &prb_alloc)) {
fprintf(stderr, "Error decoding PDSCH\n");

8
lte/phy/lib/phch/test/pdsch_re_test.c
Unescape Escape View File

@ -36,6 +36,7 @@
#define N_TESTS 10
const lte_cp_t test_re_cp[N_TESTS] = {CPNORM, CPNORM, CPNORM, CPNORM, CPNORM, CPNORM, CPEXT, CPEXT, CPEXT, CPEXT};
const int test_re_ports[N_TESTS] = {1, 1, 1, 2, 4, 4, 1, 4, 1, 4};
const int test_re_csymb[N_TESTS] = {2, 1, 3, 3, 1, 3, 2, 2, 1, 2};
@ -60,6 +61,7 @@ int main(int argc, char **argv) {
ra_prb_t prb_alloc;
int ret = -1;
pdsch_t pdsch;
lte_cell_t cell;
while (getopt(argc, argv, "v") == 'v') {
verbose++;
@ -71,8 +73,12 @@ int main(int argc, char **argv) {
}
for (i=0;i<N_TESTS;i++) {
cell.id = 0;
cell.nof_prb = test_re_prb[i];
cell.nof_ports = test_re_ports[i];
cell.cp = test_re_cp[i];
pdsch_init(&pdsch, 0, test_re_prb[i], test_re_ports[i], 0, test_re_cp[i]);
pdsch_init(&pdsch, 0, cell);
memset(prb_alloc.re_sf, 0, sizeof(int) * 10);
prb_alloc.slot[0].nof_prb = test_re_prb[i];

46
lte/phy/lib/phch/test/pdsch_test.c
Unescape Escape View File

@ -34,28 +34,32 @@
#include "liblte/phy/phy.h"
int cell_id = 1;
int nof_prb = 6;
int nof_ports = 1;
int cfi = 1;
int tbs = -1;
int subframe = 1;
lte_cell_t cell = {
6, // nof_prb
1, // nof_ports
1, // cell_id
CPNORM // cyclic prefix
};
uint8_t cfi = 1;
uint16_t tbs = -1;
uint8_t subframe = 1;
ra_mod_t modulation = BPSK;
void usage(char *prog) {
printf("Usage: %s [cpnfvmt] -l TBS \n", prog);
printf("Usage: %s [cell.cpnfvmt] -l TBS \n", prog);
printf("\t-m modulation (1: BPSK, 2: QPSK, 3: QAM16, 4: QAM64) [Default BPSK]\n");
printf("\t-c cell id [Default %d]\n", cell_id);
printf("\t-c cell id [Default %d]\n", cell.id);
printf("\t-s subframe [Default %d]\n", subframe);
printf("\t-f cfi [Default %d]\n", cfi);
printf("\t-p nof_ports [Default %d]\n", nof_ports);
printf("\t-n nof_prb [Default %d]\n", nof_prb);
printf("\t-p cell.nof_ports [Default %d]\n", cell.nof_ports);
printf("\t-n cell.nof_prb [Default %d]\n", cell.nof_prb);
printf("\t-v [set verbose to debug, default none]\n");
}
void parse_args(int argc, char **argv) {
int opt;
while ((opt = getopt(argc, argv, "lcpnfvmts")) != -1) {
while ((opt = getopt(argc, argv, "lcell.cpnfvmts")) != -1) {
switch(opt) {
case 'm':
switch(atoi(argv[optind])) {
@ -84,13 +88,13 @@ void parse_args(int argc, char **argv) {
tbs = atoi(argv[optind]);
break;
case 'p':
nof_ports = atoi(argv[optind]);
cell.nof_ports = atoi(argv[optind]);
break;
case 'n':
nof_prb = atoi(argv[optind]);
cell.nof_prb = atoi(argv[optind]);
break;
case 'c':
cell_id = atoi(argv[optind]);
cell.id = atoi(argv[optind]);
break;
case 'v':
verbose++;
@ -120,20 +124,20 @@ int main(int argc, char **argv) {
parse_args(argc,argv);
nof_re = 2 * CPNORM_NSYMB * nof_prb * RE_X_RB;
nof_re = 2 * CPNORM_NSYMB * cell.nof_prb * RE_X_RB;
mcs.tbs = tbs;
mcs.mod = modulation;
prb_alloc.slot[0].nof_prb = nof_prb;
prb_alloc.slot[0].nof_prb = cell.nof_prb;
for (i=0;i<prb_alloc.slot[0].nof_prb;i++) {
prb_alloc.slot[0].prb_idx[i] = i;
}
memcpy(&prb_alloc.slot[1], &prb_alloc.slot[0], sizeof(ra_prb_slot_t));
ra_prb_get_re(&prb_alloc, nof_prb, nof_ports, 2, CPNORM);
ra_prb_get_re(&prb_alloc, cell.nof_prb, cell.nof_ports, 2, CPNORM);
/* init memory */
for (i=0;i<nof_ports;i++) {
for (i=0;i<cell.nof_ports;i++) {
ce[i] = malloc(sizeof(cf_t) * nof_re);
if (!ce[i]) {
perror("malloc");
@ -155,7 +159,7 @@ int main(int argc, char **argv) {
goto quit;
}
if (pdsch_init(&pdsch, 1234, nof_prb, nof_ports, cell_id, CPNORM)) {
if (pdsch_init(&pdsch, 1234, cell)) {
fprintf(stderr, "Error creating PDSCH object\n");
goto quit;
}
@ -167,7 +171,7 @@ int main(int argc, char **argv) {
pdsch_encode(&pdsch, data, slot_symbols, subframe, mcs, &prb_alloc);
/* combine outputs */
for (i=0;i<nof_ports;i++) {
for (i=0;i<cell.nof_ports;i++) {
for (j=0;j<nof_re;j++) {
if (i > 0) {
slot_symbols[0][j] += slot_symbols[i][j];
@ -190,7 +194,7 @@ int main(int argc, char **argv) {
quit:
pdsch_free(&pdsch);
for (i=0;i<nof_ports;i++) {
for (i=0;i<cell.nof_ports;i++) {
if (ce[i]) {
free(ce[i]);
}

55
lte/phy/lib/phch/test/phich_file_test.c
Unescape Escape View File

@ -35,10 +35,14 @@
char *input_file_name = NULL;
char *matlab_file_name = NULL;
int cell_id = 150;
lte_cp_t cp = CPNORM;
int nof_prb = 50;
int nof_ports = 2;
lte_cell_t cell = {
50, // cell.nof_prb
2, // cell.nof_ports
150, // cell.id
CPNORM // cyclic prefix
};
int flen;
int nof_ctrl_symbols = 1;
phich_resources_t phich_res = R_1;
@ -57,9 +61,9 @@ chest_t chest;
void usage(char *prog) {
printf("Usage: %s [vcoe] -i input_file\n", prog);
printf("\t-o output matlab file name [Default Disabled]\n");
printf("\t-c cell_id [Default %d]\n", cell_id);
printf("\t-p nof_ports [Default %d]\n", nof_ports);
printf("\t-n nof_prb [Default %d]\n", nof_prb);
printf("\t-c cell.id [Default %d]\n", cell.id);
printf("\t-p cell.nof_ports [Default %d]\n", cell.nof_ports);
printf("\t-n cell.nof_prb [Default %d]\n", cell.nof_prb);
printf("\t-f nof control symbols [Default %d]\n", nof_ctrl_symbols);
printf("\t-g phich ng factor: 1/6, 1/2, 1, 2 [Default 1]\n");
printf("\t-e phich extended length [Default normal]\n");
@ -78,7 +82,7 @@ void parse_args(int argc, char **argv) {
matlab_file_name = argv[optind];
break;
case 'c':
cell_id = atoi(argv[optind]);
cell.id = atoi(argv[optind]);
break;
case 'f':
nof_ctrl_symbols = atoi(argv[optind]);
@ -100,16 +104,16 @@ void parse_args(int argc, char **argv) {
phich_length = PHICH_EXT;
break;
case 'n':
nof_prb = atoi(argv[optind]);
cell.nof_prb = atoi(argv[optind]);
break;
case 'p':
nof_ports = atoi(argv[optind]);
cell.nof_ports = atoi(argv[optind]);
break;
case 'v':
verbose++;
break;
case 'l':
cp = CPEXT;
cell.cp = CPEXT;
break;
default:
usage(argv[0]);
@ -140,7 +144,7 @@ int base_init() {
fmatlab = NULL;
}
flen = SLOT_LEN(lte_symbol_sz(nof_prb), cp);
flen = SLOT_LEN(lte_symbol_sz(cell.nof_prb), cell.cp);
input_buffer = malloc(flen * sizeof(cf_t));
if (!input_buffer) {
@ -148,41 +152,36 @@ int base_init() {
exit(-1);
}
fft_buffer = malloc(CP_NSYMB(cp) * nof_prb * RE_X_RB * sizeof(cf_t));
fft_buffer = malloc(CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB * sizeof(cf_t));
if (!fft_buffer) {
perror("malloc");
return -1;
}
for (i=0;i<MAX_PORTS;i++) {
ce[i] = malloc(CP_NSYMB(cp) * nof_prb * RE_X_RB * sizeof(cf_t));
ce[i] = malloc(CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB * sizeof(cf_t));
if (!ce[i]) {
perror("malloc");
return -1;
}
}
if (chest_init(&chest, LINEAR, cp, nof_prb, nof_ports)) {
if (chest_init_LTEDL(&chest, LINEAR, cell)) {
fprintf(stderr, "Error initializing equalizer\n");
return -1;
}
if (chest_ref_LTEDL(&chest, cell_id)) {
fprintf(stderr, "Error initializing reference signal\n");
return -1;
}
if (lte_fft_init(&fft, cp, nof_prb)) {
if (lte_fft_init(&fft, cell.cp, cell.nof_prb)) {
fprintf(stderr, "Error initializing FFT\n");
return -1;
}
if (regs_init(&regs, cell_id, nof_prb, nof_ports, phich_res, phich_length, cp)) {
if (regs_init(&regs, phich_res, phich_length, cell)) {
fprintf(stderr, "Error initiating regs\n");
return -1;
}
if (phich_init(&phich, &regs, cell_id, nof_prb, nof_ports, cp)) {
if (phich_init(&phich, &regs, cell)) {
fprintf(stderr, "Error creating PBCH object\n");
return -1;
}
@ -214,9 +213,9 @@ void base_free() {
}
int main(int argc, char **argv) {
int distance;
uint8_t distance;
int i, n;
int ngroup, nseq, max_nseq;
uint8_t ngroup, nseq, max_nseq;
char ack_rx;
if (argc < 3) {
@ -226,7 +225,7 @@ int main(int argc, char **argv) {
parse_args(argc,argv);
max_nseq = CP_ISNORM(cp)?PHICH_NORM_NSEQUENCES:PHICH_EXT_NSEQUENCES;
max_nseq = CP_ISNORM(cell.cp)?PHICH_NORM_NSEQUENCES:PHICH_EXT_NSEQUENCES;
if (base_init()) {
fprintf(stderr, "Error initializing memory\n");
@ -243,12 +242,12 @@ int main(int argc, char **argv) {
fprintf(fmatlab, ";\n");
fprintf(fmatlab, "outfft=");
vec_fprint_c(fmatlab, fft_buffer, CP_NSYMB(cp) * nof_prb * RE_X_RB);
vec_fprint_c(fmatlab, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
fprintf(fmatlab, ";\n");
}
/* Get channel estimates for each port */
for (i=0;i<nof_ports;i++) {
for (i=0;i<cell.nof_ports;i++) {
chest_ce_slot_port(&chest, fft_buffer, ce[i], 0, i);
if (fmatlab) {
chest_fprint(&chest, fmatlab, 0, i);

47
lte/phy/lib/phch/test/phich_test.c
Unescape Escape View File

@ -33,18 +33,22 @@
#include "liblte/phy/phy.h"
int cell_id = -1;
int nof_prb = 6;
int nof_ports = 1;
lte_cp_t cp = CPNORM;
lte_cell_t cell = {
6, // nof_prb
1, // nof_ports
1000, // cell_id
CPNORM // cyclic prefix
};
phich_resources_t phich_res = R_1;
phich_length_t phich_length = PHICH_NORM;
void usage(char *prog) {
printf("Usage: %s [cpvgel]\n", prog);
printf("\t-c cell id [Default %d]\n", cell_id);
printf("\t-p nof_ports [Default %d]\n", nof_ports);
printf("\t-n nof_prb [Default %d]\n", nof_prb);
printf("\t-c cell id [Default %d]\n", cell.id);
printf("\t-p cell.nof_ports [Default %d]\n", cell.nof_ports);
printf("\t-n cell.nof_prb [Default %d]\n", cell.nof_prb);
printf("\t-g phich ng factor: 1/6, 1/2, 1, 2 [Default 1]\n");
printf("\t-e phich extended length [Default normal]\n");
printf("\t-l extended cyclic prefix [Default normal]\n");
@ -56,13 +60,13 @@ void parse_args(int argc, char **argv) {
while ((opt = getopt(argc, argv, "cpnvgel")) != -1) {
switch(opt) {
case 'p':
nof_ports = atoi(argv[optind]);
cell.nof_ports = atoi(argv[optind]);
break;
case 'n':
nof_prb = atoi(argv[optind]);
cell.nof_prb = atoi(argv[optind]);
break;
case 'c':
cell_id = atoi(argv[optind]);
cell.id = atoi(argv[optind]);
break;
case 'g':
if (!strcmp(argv[optind], "1/6")) {
@ -81,7 +85,7 @@ void parse_args(int argc, char **argv) {
phich_length = PHICH_EXT;
break;
case 'l':
cp = CPEXT;
cell.cp = CPEXT;
break;
case 'v':
verbose++;
@ -102,15 +106,15 @@ int main(int argc, char **argv) {
int nof_re;
cf_t *slot_symbols[MAX_PORTS];
char ack[50][PHICH_NORM_NSEQUENCES], ack_rx;
int nsf, distance;
uint8_t nsf, distance;
int cid, max_cid;
int ngroup, nseq, max_nseq;
uint8_t ngroup, nseq, max_nseq;
parse_args(argc,argv);
max_nseq = CP_ISNORM(cp)?PHICH_NORM_NSEQUENCES:PHICH_EXT_NSEQUENCES;
max_nseq = CP_ISNORM(cell.cp)?PHICH_NORM_NSEQUENCES:PHICH_EXT_NSEQUENCES;
nof_re = CPNORM_NSYMB * nof_prb * RE_X_RB;
nof_re = CPNORM_NSYMB * cell.nof_prb * RE_X_RB;
/* init memory */
for (i=0;i<MAX_PORTS;i++) {
@ -129,23 +133,24 @@ int main(int argc, char **argv) {
}
}
if (cell_id == -1) {
if (cell.id == 1000) {
cid = 0;
max_cid = 503;
} else {
cid = cell_id;
max_cid = cell_id;
cid = cell.id;
max_cid = cell.id;
}
while(cid <= max_cid) {
cell.id = cid;
printf("Testing CellID=%d...\n", cid);
if (regs_init(&regs, cid, nof_prb, nof_ports, phich_res, phich_length, cp)) {
if (regs_init(&regs, phich_res, phich_length, cell)) {
fprintf(stderr, "Error initiating regs\n");
exit(-1);
}
if (phich_init(&phich, &regs, cid, nof_prb, nof_ports, cp)) {
if (phich_init(&phich, &regs, cell)) {
fprintf(stderr, "Error creating PBCH object\n");
exit(-1);
}
@ -164,7 +169,7 @@ int main(int argc, char **argv) {
}
}
/* combine outputs */
for (i=1;i<nof_ports;i++) {
for (i=1;i<cell.nof_ports;i++) {
for (j=0;j<nof_re;j++) {
slot_symbols[0][j] += slot_symbols[i][j];
}

5
lte/phy/lib/sync/src/sync_frame.c
Unescape Escape View File

@ -30,6 +30,7 @@
#include <strings.h>
#include "liblte/phy/resampling/decim.h"
#include "liblte/phy/resampling/resample_arb.h"
#include "liblte/phy/utils/debug.h"
#include "liblte/phy/sync/sync_frame.h"
@ -60,6 +61,8 @@ int sync_frame_init(sync_frame_t *q, int downsampling) {
goto clean_exit;
}
resample_arb_init(&q->resample, (float) 1/downsampling);
q->downsampling = downsampling;
sync_frame_reset(q);
ret = 0;
@ -78,6 +81,7 @@ void sync_frame_free(sync_frame_t *q) {
if (q->input_downsampled) {
free(q->input_downsampled);
}
cfo_free(&q->cfocorr);
sync_free(&q->s);
}
@ -183,6 +187,7 @@ int sync_frame_push(sync_frame_t *q, cf_t *input, cf_t *output) {
if (q->downsampling == 1) {
input_ds = input;
} else {
//resample_arb_compute(&q->resample, input, q->input_downsampled, SYNC_SF_LEN * q->downsampling);
decim_c(input, q->input_downsampled, q->downsampling, SYNC_SF_LEN * q->downsampling);
input_ds = q->input_downsampled;
}

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