5g-team
/
srsRAN_4G
mirror of https://github.com/pvnis/srsRAN_4G.git
2
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Fixed error in PDSCH mapping. Further API simplification

Browse Source
master
ismagom 11 years ago
parent 0ebb0e7d00
commit ec321f971d
16 changed files with 357 additions and 325 deletions
Show Stats Download Patch File Download Diff File

4
lte/phy/examples/pdsch_enodeb.c
Unescape Escape View File

@ -334,13 +334,11 @@ int main(int argc, char **argv) {
data[i] = rand()%2; data[i] = rand()%2;
} }
if (pdcch_encode_msg(&pdcch, &dci_msg, locations[sf_idx][0], 1234)) { if (pdcch_encode(&pdcch, &dci_msg, locations[sf_idx][0], 1234, sf_symbols, sf_idx, cfi)) {
fprintf(stderr, "Error encoding DCI message\n"); fprintf(stderr, "Error encoding DCI message\n");
exit(-1); exit(-1);
} }
pdcch_gen_symbols(&pdcch, sf_symbols, sf_idx, cfi);
pdsch_encode(&pdsch, data, sf_symbols, sf_idx, ra_dl.mcs, &prb_alloc); pdsch_encode(&pdsch, data, sf_symbols, sf_idx, ra_dl.mcs, &prb_alloc);
/* Transform to OFDM symbols */ /* Transform to OFDM symbols */

28
lte/phy/examples/pdsch_ue.c
Unescape Escape View File

@ -393,8 +393,7 @@ int cell_id_init(int nof_prb, int cell_id) {
char data[10000]; char data[10000];
int rx_run(cf_t *input, int sf_idx) { int rx_run(cf_t *input, int sf_idx) {
uint32_t cfi, cfi_distance; uint32_t cfi, cfi_distance, i;
int i, nof_dcis;
cf_t *input_decim; cf_t *input_decim;
ra_pdsch_t ra_dl; ra_pdsch_t ra_dl;
ra_prb_t prb_alloc; ra_prb_t prb_alloc;
@ -430,18 +429,19 @@ int rx_run(cf_t *input, int sf_idx) {
/* Search only UE-specific locations */ /* Search only UE-specific locations */
nof_locations = pdcch_ue_locations(&pdcch, locations, 10, sf_idx, cfi, 1234); nof_locations = pdcch_ue_locations(&pdcch, locations, 10, sf_idx, cfi, 1234);
pdcch_extract_llr(&pdcch, fft_buffer, ce, nof_frames, cfi); uint16_t crc_rem = 0;
for (i=0;i<nof_locations && crc_rem != 1234;i++) {
if (pdcch_extract_llr(&pdcch, fft_buffer, ce, locations[i], sf_idx, cfi)) {
nof_dcis = pdcch_decode_msg(&pdcch, &dci_msg, locations, nof_locations, Format1, 1234); fprintf(stderr, "Error extracting LLRs\n");
if (nof_dcis < 0) { return -1;
fprintf(stderr, "Error decoding DCI messages\n"); }
return -1; if (pdcch_decode_msg(&pdcch, &dci_msg, Format1A, &crc_rem)) {
fprintf(stderr, "Error decoding DCI msg\n");
return -1;
}
} }
INFO("Received %d DCI messages\n", nof_dcis); if (crc_rem == 1234) {
if (nof_dcis == 1) {
dci_msg_type_t type; dci_msg_type_t type;
if (dci_msg_get_type(&dci_msg, &type, cell.nof_prb, 1234, 1234)) { if (dci_msg_get_type(&dci_msg, &type, cell.nof_prb, 1234, 1234)) {
fprintf(stderr, "Can't get DCI message type\n"); fprintf(stderr, "Can't get DCI message type\n");
@ -482,7 +482,7 @@ int rx_run(cf_t *input, int sf_idx) {
} }
#ifndef DISABLE_GRAPHICS #ifndef DISABLE_GRAPHICS
if (!disable_plots && nof_dcis > 0) { if (!disable_plots && crc_rem == 1234) {
int n_re = 2 * RE_X_RB * CPNORM_NSYMB * cell.nof_prb; int n_re = 2 * RE_X_RB * CPNORM_NSYMB * cell.nof_prb;
for (i = 0; i < n_re; i++) { for (i = 0; i < n_re; i++) {
tmp_plot[i] = 10 * log10f(cabsf(fft_buffer[i])); tmp_plot[i] = 10 * log10f(cabsf(fft_buffer[i]));

14
lte/phy/include/liblte/phy/common/fft.h
Unescape Escape View File

@ -42,18 +42,18 @@ typedef _Complex float cf_t; /* this is only a shortcut */
/* This is common for both directions */ /* This is common for both directions */
typedef struct LIBLTE_API{ typedef struct LIBLTE_API{
dft_plan_t fft_plan; dft_plan_t fft_plan;
int nof_symbols; uint32_t nof_symbols;
int symbol_sz; uint32_t symbol_sz;
int nof_guards; uint32_t nof_guards;
int nof_re; uint32_t nof_re;
int slot_sz; uint32_t slot_sz;
lte_cp_t cp; lte_cp_t cp;
cf_t *tmp; // for removing zero padding cf_t *tmp; // for removing zero padding
}lte_fft_t; }lte_fft_t;
LIBLTE_API int lte_fft_init(lte_fft_t *q, LIBLTE_API int lte_fft_init(lte_fft_t *q,
lte_cp_t cp_type, lte_cp_t cp_type,
int nof_prb); uint32_t nof_prb);
LIBLTE_API void lte_fft_free(lte_fft_t *q); LIBLTE_API void lte_fft_free(lte_fft_t *q);
@ -67,7 +67,7 @@ LIBLTE_API void lte_fft_run_sf(lte_fft_t *q,
LIBLTE_API int lte_ifft_init(lte_fft_t *q, LIBLTE_API int lte_ifft_init(lte_fft_t *q,
lte_cp_t cp_type, lte_cp_t cp_type,
int nof_prb); uint32_t nof_prb);
LIBLTE_API void lte_ifft_free(lte_fft_t *q); LIBLTE_API void lte_ifft_free(lte_fft_t *q);

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

@ -78,6 +78,8 @@ LIBLTE_API int dci_location_set(dci_location_t *c,
uint32_t L, uint32_t L,
uint32_t nCCE); uint32_t nCCE);
LIBLTE_API bool dci_location_isvalid(dci_location_t *c);
LIBLTE_API int dci_msg_get_type(dci_msg_t *msg, LIBLTE_API int dci_msg_get_type(dci_msg_t *msg,
dci_msg_type_t *type, dci_msg_type_t *type,
uint32_t nof_prb, uint32_t nof_prb,

23
lte/phy/include/liblte/phy/phch/pdcch.h
Unescape Escape View File

@ -59,8 +59,7 @@ typedef enum LIBLTE_API {
/* PDCCH object */ /* PDCCH object */
typedef struct LIBLTE_API { typedef struct LIBLTE_API {
lte_cell_t cell; lte_cell_t cell;
uint32_t nof_bits; uint32_t e_bits;
uint32_t nof_symbols;
uint32_t nof_regs; uint32_t nof_regs;
uint32_t nof_cce; uint32_t nof_cce;
uint32_t max_bits; uint32_t max_bits;
@ -91,33 +90,27 @@ LIBLTE_API void pdcch_free(pdcch_t *q);
/* Encoding function */ /* Encoding function */
LIBLTE_API void pdcch_reset(pdcch_t *q); LIBLTE_API int pdcch_encode(pdcch_t *q,
LIBLTE_API int pdcch_encode_msg(pdcch_t *q,
dci_msg_t *msg, dci_msg_t *msg,
dci_location_t location, dci_location_t location,
uint16_t rnti); uint16_t rnti,
cf_t *sf_symbols[MAX_PORTS],
LIBLTE_API int pdcch_gen_symbols(pdcch_t *q, uint32_t nsubframe,
cf_t *sf_symbols[MAX_PORTS], uint32_t cfi);
uint32_t nsubframe,
uint32_t cfi);
/* Decoding functions: Extract the LLRs and save them in the pdcch_t object */ /* Decoding functions: Extract the LLRs and save them in the pdcch_t object */
LIBLTE_API int pdcch_extract_llr(pdcch_t *q, LIBLTE_API int pdcch_extract_llr(pdcch_t *q,
cf_t *sf_symbols, cf_t *sf_symbols,
cf_t *ce[MAX_PORTS], cf_t *ce[MAX_PORTS],
dci_location_t location,
uint32_t nsubframe, uint32_t nsubframe,
uint32_t cfi); uint32_t cfi);
/* Decoding functions: Try to decode a DCI message after calling pdcch_extract_llr */ /* Decoding functions: Try to decode a DCI message after calling pdcch_extract_llr */
LIBLTE_API int pdcch_decode_msg(pdcch_t *q, LIBLTE_API int pdcch_decode_msg(pdcch_t *q,
dci_msg_t *msg, dci_msg_t *msg,
dci_location_t *locations,
uint32_t nof_locations,
dci_format_t format, dci_format_t format,
uint16_t rnti); uint16_t *crc_rem);
/* Function for generation of UE-specific search space DCI locations */ /* Function for generation of UE-specific search space DCI locations */
LIBLTE_API uint32_t pdcch_ue_locations(pdcch_t *q, LIBLTE_API uint32_t pdcch_ue_locations(pdcch_t *q,

12
lte/phy/include/liblte/phy/phch/regs.h
Unescape Escape View File

@ -114,10 +114,22 @@ LIBLTE_API int regs_pdcch_put(regs_t *h,
cf_t *pdcch_symbols, cf_t *pdcch_symbols,
cf_t *slot_symbols); cf_t *slot_symbols);
LIBLTE_API int regs_pdcch_put_offset(regs_t *h,
cf_t *pdcch_symbols,
cf_t *slot_symbols,
uint32_t start_reg,
uint32_t nof_regs);
LIBLTE_API int regs_pdcch_get(regs_t *h, LIBLTE_API int regs_pdcch_get(regs_t *h,
cf_t *slot_symbols, cf_t *slot_symbols,
cf_t *pdcch_symbols); cf_t *pdcch_symbols);
LIBLTE_API int regs_pdcch_get_offset(regs_t *h,
cf_t *slot_symbols,
cf_t *pdcch_symbols,
uint32_t start_reg,
uint32_t nof_regs);
#endif // REGS_H_ #endif // REGS_H_

12
lte/phy/lib/ch_estimation/src/refsignal.c
Unescape Escape View File

@ -67,12 +67,12 @@ int refsignal_v(uint32_t port_id, uint32_t ns, uint32_t symbol_id) {
return v; return v;
} }
int refsignal_k(int m, int v, uint32_t cell_id) { uint32_t refsignal_k(uint32_t m, uint32_t v, uint32_t cell_id) {
return 6*m+((v+(cell_id%6))%6); return 6*m+((v+(cell_id%6))%6);
} }
int refsignal_put(refsignal_t *q, cf_t *slot_symbols) { int refsignal_put(refsignal_t *q, cf_t *slot_symbols) {
int i; uint32_t i;
uint32_t fidx, tidx; uint32_t fidx, tidx;
if (q != NULL && if (q != NULL &&
slot_symbols != NULL) slot_symbols != NULL)
@ -96,12 +96,12 @@ int refsignal_init_LTEDL(refsignal_t *q, uint32_t port_id, uint32_t nslot,
uint32_t c_init; uint32_t c_init;
uint32_t ns, l, lp[2]; uint32_t ns, l, lp[2];
int N_cp; uint32_t N_cp;
int i; uint32_t i;
int ret = LIBLTE_ERROR_INVALID_INPUTS; int ret = LIBLTE_ERROR_INVALID_INPUTS;
sequence_t seq; sequence_t seq;
int v; int v;
int mp; uint32_t mp;
uint32_t nof_refs_x_symbol, nof_ref_symbols; uint32_t nof_refs_x_symbol, nof_ref_symbols;
if (q != NULL && if (q != NULL &&
@ -171,7 +171,7 @@ int refsignal_init_LTEDL(refsignal_t *q, uint32_t port_id, uint32_t nslot,
__imag__ q->refs[idx(l,i)].simbol = (1 - 2 * (float) seq.c[2 * mp + 1]) / sqrt(2); __imag__ q->refs[idx(l,i)].simbol = (1 - 2 * (float) seq.c[2 * mp + 1]) / sqrt(2);
/* mapping to resource elements */ /* mapping to resource elements */
q->refs[idx(l,i)].freq_idx = refsignal_k(i, v, cell.id); q->refs[idx(l,i)].freq_idx = refsignal_k(i, (uint32_t) v, cell.id);
q->refs[idx(l,i)].time_idx = lp[l]; q->refs[idx(l,i)].time_idx = lp[l];
} }
} }

44
lte/phy/lib/common/src/fft.c
Unescape Escape View File

@ -35,10 +35,10 @@
#include "liblte/phy/utils/debug.h" #include "liblte/phy/utils/debug.h"
#include "liblte/phy/utils/vector.h" #include "liblte/phy/utils/vector.h"
int lte_fft_init_(lte_fft_t *q, lte_cp_t cp, int nof_prb, dft_dir_t dir) { int lte_fft_init_(lte_fft_t *q, lte_cp_t cp, uint32_t nof_prb, dft_dir_t dir) {
int symbol_sz = lte_symbol_sz(nof_prb); int symbol_sz = lte_symbol_sz(nof_prb);
if (symbol_sz == -1) { if (symbol_sz < 0) {
fprintf(stderr, "Error: Invalid nof_prb=%d\n", nof_prb); fprintf(stderr, "Error: Invalid nof_prb=%d\n", nof_prb);
return -1; return -1;
} }
@ -46,7 +46,7 @@ int lte_fft_init_(lte_fft_t *q, lte_cp_t cp, int nof_prb, dft_dir_t dir) {
fprintf(stderr, "Error: Creating DFT plan\n"); fprintf(stderr, "Error: Creating DFT plan\n");
return -1; return -1;
} }
q->tmp = malloc(symbol_sz * sizeof(cf_t)); q->tmp = malloc((uint32_t) symbol_sz * sizeof(cf_t));
if (!q->tmp) { if (!q->tmp) {
perror("malloc"); perror("malloc");
return -1; return -1;
@ -56,7 +56,7 @@ int lte_fft_init_(lte_fft_t *q, lte_cp_t cp, int nof_prb, dft_dir_t dir) {
dft_plan_set_norm(&q->fft_plan, true); dft_plan_set_norm(&q->fft_plan, true);
dft_plan_set_dc(&q->fft_plan, true); dft_plan_set_dc(&q->fft_plan, true);
q->symbol_sz = symbol_sz; q->symbol_sz = (uint32_t) symbol_sz;
q->nof_symbols = CP_NSYMB(cp); q->nof_symbols = CP_NSYMB(cp);
q->cp = cp; q->cp = cp;
q->nof_re = nof_prb * RE_X_RB; q->nof_re = nof_prb * RE_X_RB;
@ -66,7 +66,8 @@ int lte_fft_init_(lte_fft_t *q, lte_cp_t cp, int nof_prb, dft_dir_t dir) {
DEBUG("Init %s symbol_sz=%d, nof_symbols=%d, cp=%s, nof_re=%d, nof_guards=%d\n", DEBUG("Init %s symbol_sz=%d, nof_symbols=%d, cp=%s, nof_re=%d, nof_guards=%d\n",
dir==FORWARD?"FFT":"iFFT", q->symbol_sz, q->nof_symbols, dir==FORWARD?"FFT":"iFFT", q->symbol_sz, q->nof_symbols,
q->cp==CPNORM?"Normal":"Extended", q->nof_re, q->nof_guards); q->cp==CPNORM?"Normal":"Extended", q->nof_re, q->nof_guards);
return 0;
return LIBLTE_SUCCESS;
} }
void lte_fft_free_(lte_fft_t *q) { void lte_fft_free_(lte_fft_t *q) {
@ -77,7 +78,7 @@ void lte_fft_free_(lte_fft_t *q) {
bzero(q, sizeof(lte_fft_t)); bzero(q, sizeof(lte_fft_t));
} }
int lte_fft_init(lte_fft_t *q, lte_cp_t cp, int nof_prb) { int lte_fft_init(lte_fft_t *q, lte_cp_t cp, uint32_t nof_prb) {
return lte_fft_init_(q, cp, nof_prb, FORWARD); return lte_fft_init_(q, cp, nof_prb, FORWARD);
} }
@ -85,17 +86,20 @@ void lte_fft_free(lte_fft_t *q) {
lte_fft_free_(q); lte_fft_free_(q);
} }
int lte_ifft_init(lte_fft_t *q, lte_cp_t cp, int nof_prb) { int lte_ifft_init(lte_fft_t *q, lte_cp_t cp, uint32_t nof_prb) {
int i; uint32_t i;
if (lte_fft_init_(q, cp, nof_prb, BACKWARD)) { int ret;
return -1;
} ret = lte_fft_init_(q, cp, nof_prb, BACKWARD);
/* set now zeros at CP */
for (i=0;i<q->nof_symbols;i++) { if (ret == LIBLTE_SUCCESS) {
bzero(q->tmp, q->nof_guards * sizeof(cf_t)); /* set now zeros at CP */
bzero(&q->tmp[q->nof_re + q->nof_guards], q->nof_guards * sizeof(cf_t)); for (i=0;i<q->nof_symbols;i++) {
bzero(q->tmp, q->nof_guards * sizeof(cf_t));
bzero(&q->tmp[q->nof_re + q->nof_guards], q->nof_guards * sizeof(cf_t));
}
} }
return 0; return ret;
} }
void lte_ifft_free(lte_fft_t *q) { void lte_ifft_free(lte_fft_t *q) {
@ -106,7 +110,7 @@ void lte_ifft_free(lte_fft_t *q) {
* Performs FFT on a each symbol and removes CP. * Performs FFT on a each symbol and removes CP.
*/ */
void lte_fft_run_slot(lte_fft_t *q, cf_t *input, cf_t *output) { void lte_fft_run_slot(lte_fft_t *q, cf_t *input, cf_t *output) {
int i; uint32_t i;
for (i=0;i<q->nof_symbols;i++) { for (i=0;i<q->nof_symbols;i++) {
input += CP_ISNORM(q->cp)?CP_NORM(i, q->symbol_sz):CP_EXT(q->symbol_sz); input += CP_ISNORM(q->cp)?CP_NORM(i, q->symbol_sz):CP_EXT(q->symbol_sz);
dft_run_c(&q->fft_plan, input, q->tmp); dft_run_c(&q->fft_plan, input, q->tmp);
@ -117,7 +121,7 @@ void lte_fft_run_slot(lte_fft_t *q, cf_t *input, cf_t *output) {
} }
void lte_fft_run_sf(lte_fft_t *q, cf_t *input, cf_t *output) { void lte_fft_run_sf(lte_fft_t *q, cf_t *input, cf_t *output) {
int n; uint32_t n;
for (n=0;n<2;n++) { for (n=0;n<2;n++) {
lte_fft_run_slot(q, &input[n*q->slot_sz], &output[n*q->nof_re*q->nof_symbols]); lte_fft_run_slot(q, &input[n*q->slot_sz], &output[n*q->nof_re*q->nof_symbols]);
} }
@ -127,7 +131,7 @@ void lte_fft_run_sf(lte_fft_t *q, cf_t *input, cf_t *output) {
* Performs FFT on a each symbol and adds CP. * Performs FFT on a each symbol and adds CP.
*/ */
void lte_ifft_run_slot(lte_fft_t *q, cf_t *input, cf_t *output) { void lte_ifft_run_slot(lte_fft_t *q, cf_t *input, cf_t *output) {
int i, cp_len; uint32_t i, cp_len;
for (i=0;i<q->nof_symbols;i++) { for (i=0;i<q->nof_symbols;i++) {
cp_len = CP_ISNORM(q->cp)?CP_NORM(i, q->symbol_sz):CP_EXT(q->symbol_sz); cp_len = CP_ISNORM(q->cp)?CP_NORM(i, q->symbol_sz):CP_EXT(q->symbol_sz);
memcpy(&q->tmp[q->nof_guards], input, q->nof_re * sizeof(cf_t)); memcpy(&q->tmp[q->nof_guards], input, q->nof_re * sizeof(cf_t));
@ -140,7 +144,7 @@ void lte_ifft_run_slot(lte_fft_t *q, cf_t *input, cf_t *output) {
} }
void lte_ifft_run_sf(lte_fft_t *q, cf_t *input, cf_t *output) { void lte_ifft_run_sf(lte_fft_t *q, cf_t *input, cf_t *output) {
int n; uint32_t n;
for (n=0;n<2;n++) { for (n=0;n<2;n++) {
lte_ifft_run_slot(q, &input[n*q->nof_re*q->nof_symbols], &output[n*q->slot_sz]); lte_ifft_run_slot(q, &input[n*q->nof_re*q->nof_symbols], &output[n*q->slot_sz]);
} }

35
lte/phy/lib/fec/src/convcoder.c
Unescape Escape View File

@ -39,23 +39,30 @@ int convcoder_encode(convcoder_t *q, char *input, char *output, uint32_t frame_l
uint32_t i,j; uint32_t i,j;
uint32_t len = q->tail_biting ? frame_length : (frame_length + q->K - 1); uint32_t len = q->tail_biting ? frame_length : (frame_length + q->K - 1);
if (q->tail_biting) { if (q != NULL &&
sr = 0; input != NULL &&
for (i=frame_length - q->K + 1; i<frame_length; i++) { output != NULL &&
sr = (sr << 1) | (input[i] & 1); frame_length > q->K + 1)
{
if (q->tail_biting) {
sr = 0;
for (i=frame_length - q->K + 1; i<frame_length; i++) {
sr = (sr << 1) | (input[i] & 1);
}
} else {
sr = 0;
} }
} else { for (i = 0; i < len; i++) {
sr = 0; char bit = (i < frame_length) ? (input[i] & 1) : 0;
} sr = (sr << 1) | bit;
for (i = 0; i < len; i++) { for (j=0;j<q->R;j++) {
int bit = (i < frame_length) ? (input[i] & 1) : 0; output[q->R * i + j] = parity(sr & q->poly[j]);
sr = (sr << 1) | bit; }
for (j=0;j<q->R;j++) {
output[q->R * i + j] = parity(sr & q->poly[j]);
} }
return q->R*len;
} else {
return LIBLTE_ERROR_INVALID_INPUTS;
} }
return q->R*len;
} }

12
lte/phy/lib/phch/src/dci.c
Unescape Escape View File

@ -57,6 +57,14 @@ int dci_location_set(dci_location_t *c, uint32_t L, uint32_t nCCE) {
return LIBLTE_SUCCESS; return LIBLTE_SUCCESS;
} }
bool dci_location_isvalid(dci_location_t *c) {
if (c->L <= 3 && c->ncce <= 87) {
return true;
} else {
return false;
}
}
uint32_t riv_nbits(uint32_t nof_prb) { uint32_t riv_nbits(uint32_t nof_prb) {
return (uint32_t) ceilf(log2f((float) nof_prb * ((float) nof_prb + 1) / 2)); return (uint32_t) ceilf(log2f((float) nof_prb * ((float) nof_prb + 1) / 2));
} }
@ -785,7 +793,9 @@ 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, uint32_t nof_prb, int dci_msg_get_type(dci_msg_t *msg, dci_msg_type_t *type, uint32_t nof_prb,
uint16_t msg_rnti, uint16_t crnti) { uint16_t msg_rnti, uint16_t crnti)
{
DEBUG("Get message type: nof_bits=%d, msg_rnti=0x%x, crnti=0x%x\n", msg->nof_bits, msg_rnti, crnti);
if (msg->nof_bits == dci_format_sizeof(Format0, nof_prb) if (msg->nof_bits == dci_format_sizeof(Format0, nof_prb)
&& !msg->data[0]) { && !msg->data[0]) {
type->type = PUSCH_SCHED; type->type = PUSCH_SCHED;

309
lte/phy/lib/phch/src/pdcch.c
Unescape Escape View File

@ -54,8 +54,6 @@ static void set_cfi(pdcch_t *q, uint32_t cfi) {
if (cfi > 0 && cfi < 4) { if (cfi > 0 && cfi < 4) {
q->nof_regs = (regs_pdcch_nregs(q->regs, cfi) / 9) * 9; q->nof_regs = (regs_pdcch_nregs(q->regs, cfi) / 9) * 9;
q->nof_cce = q->nof_regs / 9; q->nof_cce = q->nof_regs / 9;
q->nof_symbols = 4 * q->nof_regs;
q->nof_bits = 2 * q->nof_symbols;
} }
} }
@ -63,7 +61,7 @@ static void set_cfi(pdcch_t *q, uint32_t cfi) {
/** Initializes the PDCCH transmitter and receiver */ /** Initializes the PDCCH transmitter and receiver */
int pdcch_init(pdcch_t *q, regs_t *regs, lte_cell_t cell) { int pdcch_init(pdcch_t *q, regs_t *regs, lte_cell_t cell) {
int ret = LIBLTE_ERROR_INVALID_INPUTS; int ret = LIBLTE_ERROR_INVALID_INPUTS;
int i; uint32_t i;
if (q != NULL && if (q != NULL &&
regs != NULL && regs != NULL &&
@ -74,13 +72,10 @@ int pdcch_init(pdcch_t *q, regs_t *regs, lte_cell_t cell) {
q->cell = cell; q->cell = cell;
q->regs = regs; q->regs = regs;
/* Now allocate memory for the maximum number of REGs (CFI=3) /* Allocate memory for the largest aggregation level L=3 */
*/ q->max_bits = PDCCH_FORMAT_NOF_BITS(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", INFO("Init PDCCH: %d bits, %d symbols, %d ports\n", q->max_bits, q->max_bits/2, q->cell.nof_ports);
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)) { if (modem_table_std(&q->mod, LTE_QPSK, true)) {
goto clean; goto clean;
@ -94,7 +89,7 @@ int pdcch_init(pdcch_t *q, regs_t *regs, lte_cell_t cell) {
demod_soft_alg_set(&q->demod, APPROX); demod_soft_alg_set(&q->demod, APPROX);
for (i = 0; i < NSUBFRAMES_X_FRAME; i++) { for (i = 0; i < NSUBFRAMES_X_FRAME; i++) {
if (sequence_pdcch(&q->seq_pdcch[i], 2 * i, q->cell.id, q->nof_bits)) { if (sequence_pdcch(&q->seq_pdcch[i], 2 * i, q->cell.id, q->max_bits)) {
goto clean; goto clean;
} }
} }
@ -104,31 +99,31 @@ int pdcch_init(pdcch_t *q, regs_t *regs, lte_cell_t cell) {
goto clean; goto clean;
} }
q->pdcch_e = malloc(sizeof(char) * q->nof_bits); q->pdcch_e = malloc(sizeof(char) * q->max_bits);
if (!q->pdcch_e) { if (!q->pdcch_e) {
goto clean; goto clean;
} }
q->pdcch_llr = malloc(sizeof(float) * q->nof_bits); q->pdcch_llr = malloc(sizeof(float) * q->max_bits);
if (!q->pdcch_llr) { if (!q->pdcch_llr) {
goto clean; goto clean;
} }
q->pdcch_d = malloc(sizeof(cf_t) * q->nof_symbols); q->pdcch_d = malloc(sizeof(cf_t) * q->max_bits / 2);
if (!q->pdcch_d) { if (!q->pdcch_d) {
goto clean; goto clean;
} }
for (i = 0; i < MAX_PORTS; i++) { for (i = 0; i < MAX_PORTS; i++) {
q->ce[i] = malloc(sizeof(cf_t) * q->nof_symbols); q->ce[i] = malloc(sizeof(cf_t) * q->max_bits / 2);
if (!q->ce[i]) { if (!q->ce[i]) {
goto clean; goto clean;
} }
q->pdcch_x[i] = malloc(sizeof(cf_t) * q->nof_symbols); q->pdcch_x[i] = malloc(sizeof(cf_t) * q->max_bits / 2);
if (!q->pdcch_x[i]) { if (!q->pdcch_x[i]) {
goto clean; goto clean;
} }
q->pdcch_symbols[i] = malloc(sizeof(cf_t) * q->nof_symbols); q->pdcch_symbols[i] = malloc(sizeof(cf_t) * q->max_bits / 2);
if (!q->pdcch_symbols[i]) { if (!q->pdcch_symbols[i]) {
goto clean; goto clean;
} }
@ -277,10 +272,6 @@ static int dci_decode(pdcch_t *q, float *e, char *data, uint32_t E, uint32_t nof
nof_bits < DCI_MAX_BITS) nof_bits < DCI_MAX_BITS)
{ {
if (VERBOSE_ISDEBUG()) {
vec_fprint_f(stdout, e, E);
}
/* unrate matching */ /* unrate matching */
rm_conv_rx(e, E, tmp, 3 * (nof_bits + 16)); rm_conv_rx(e, E, tmp, 3 * (nof_bits + 16));
@ -299,7 +290,7 @@ static int dci_decode(pdcch_t *q, float *e, char *data, uint32_t E, uint32_t nof
x = &data[nof_bits]; x = &data[nof_bits];
p_bits = (uint16_t) bit_unpack(&x, 16); p_bits = (uint16_t) bit_unpack(&x, 16);
crc_res = ((uint16_t) crc_checksum(&q->crc, data, nof_bits) & 0xffff); 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, DEBUG("p_bits: 0x%x, crc_checksum: 0x%x, crc_rem: 0x%x\n", p_bits, crc_res,
p_bits ^ crc_res); p_bits ^ crc_res);
if (crc) { if (crc) {
@ -313,123 +304,113 @@ static int dci_decode(pdcch_t *q, float *e, char *data, uint32_t E, uint32_t nof
/** Tries to decode a DCI message from the LLRs stored in the pdcch_t structure by the function /** Tries to decode a DCI message from the LLRs stored in the pdcch_t structure by the function
* pdcch_extract_llr(). This function can be called multiple times. * pdcch_extract_llr(). This function can be called multiple times.
* The decoded message is stored in msg. Up to nof_locations are tried from the array of dci_locations_t * The decoded message is stored in msg and the CRC remainder in crc_rem pointer
* pointed by locations. The CRC is checked agains the RNTI parameter.
* *
* Returns 1 if the message is correctly decoded, 0 if not and -1 on error.
*/ */
int pdcch_decode_msg(pdcch_t *q, dci_msg_t *msg, int pdcch_decode_msg(pdcch_t *q, dci_msg_t *msg, dci_format_t format, uint16_t *crc_rem)
dci_location_t *locations, uint32_t nof_locations,
dci_format_t format, uint16_t rnti)
{ {
int ret = LIBLTE_ERROR_INVALID_INPUTS;
if (q != NULL && if (q != NULL &&
msg != NULL && msg != NULL &&
locations != NULL && crc_rem != NULL)
nof_locations > 0)
{ {
uint16_t crc_res;
uint32_t nof_bits = dci_format_sizeof(format, q->cell.nof_prb); uint32_t nof_bits = dci_format_sizeof(format, q->cell.nof_prb);
uint32_t i;
i = 0; ret = dci_decode(q, q->pdcch_llr, msg->data, q->e_bits, nof_bits, crc_rem);
do { if (ret == LIBLTE_SUCCESS) {
INFO("Trying Candidate: Nbits: %d, E: %3d, nCCE: %d, L: %d, RNTI: 0x%x\n",
nof_bits, PDCCH_FORMAT_NOF_BITS(locations[i].L), locations[i].ncce, locations[i].L, rnti);
if (dci_decode(q, &q->pdcch_llr[72 * locations[i].ncce], msg->data,
PDCCH_FORMAT_NOF_BITS(locations[i].L), nof_bits, &crc_res) != LIBLTE_SUCCESS) {
return LIBLTE_ERROR;
}
if (crc_res != rnti) {
i++;
}
} while(i < nof_locations && crc_res != rnti);
if (rnti == crc_res) {
msg->nof_bits = nof_bits; msg->nof_bits = nof_bits;
INFO("FOUND Candidate: Nbits: %d, E: %d, nCCE: %d, L: %d, RNTI: 0x%x\n", }
nof_bits, PDCCH_FORMAT_NOF_BITS(locations[i].L), locations[i].ncce, locations[i].L, rnti);
return 1;
} else {
return LIBLTE_SUCCESS;
}
} }
return LIBLTE_ERROR_INVALID_INPUTS; return ret;
} }
/** Extracts the LLRs from the subframe symbols (demodulation) and stores them in the pdcch_t structure. /** Extracts the LLRs from dci_location_t location of the subframe and stores them in the pdcch_t structure.
* DCI messages can be extracted calling the function pdcch_decode_msg(). * DCI messages can be extracted from this location calling the function pdcch_decode_msg().
* Every time this function is called, the last demodulated symbols are overwritten. * Every time this function is called (with a different location), the last demodulated symbols are overwritten and
* new messages from other locations can be decoded
*/ */
int pdcch_extract_llr(pdcch_t *q, cf_t *sf_symbols, cf_t *ce[MAX_PORTS], uint32_t nsubframe, uint32_t cfi) { int pdcch_extract_llr(pdcch_t *q, cf_t *sf_symbols, cf_t *ce[MAX_PORTS],
dci_location_t location, uint32_t nsubframe, uint32_t cfi) {
int ret = LIBLTE_ERROR_INVALID_INPUTS;
/* Set pointers for layermapping & precoding */ /* Set pointers for layermapping & precoding */
uint32_t i; uint32_t i, nof_symbols;
cf_t *x[MAX_LAYERS]; cf_t *x[MAX_LAYERS];
if (q != NULL && if (q != NULL &&
nsubframe < 10 && nsubframe < 10 &&
cfi > 0 && cfi > 0 &&
cfi < 4) cfi < 4 &&
dci_location_isvalid(&location))
{ {
set_cfi(q, cfi); set_cfi(q, cfi);
/* number of layers equals number of ports */ q->e_bits = PDCCH_FORMAT_NOF_BITS(location.L);
for (i = 0; i < q->cell.nof_ports; i++) { nof_symbols = q->e_bits/2;
x[i] = q->pdcch_x[i]; ret = LIBLTE_ERROR;
}
memset(&x[q->cell.nof_ports], 0, sizeof(cf_t*) * (MAX_LAYERS - q->cell.nof_ports)); if (location.ncce + PDCCH_FORMAT_NOF_CCE(location.L) <= q->nof_cce) {
/* extract symbols */ INFO("Extracting LLRs: E: %d, nCCE: %d, L: %d\n",
int n = regs_pdcch_get(q->regs, sf_symbols, q->pdcch_symbols[0]); q->e_bits, location.ncce, location.L);
if (q->nof_symbols != n) {
fprintf(stderr, "Expected %d PDCCH symbols but got %d symbols\n",
q->nof_symbols, n);
return LIBLTE_ERROR;
}
/* extract channel estimates */ /* number of layers equals number of ports */
for (i = 0; i < q->cell.nof_ports; i++) { for (i = 0; i < q->cell.nof_ports; i++) {
n = regs_pdcch_get(q->regs, ce[i], q->ce[i]); x[i] = q->pdcch_x[i];
if (q->nof_symbols != n) { }
fprintf(stderr, "Expected %d PDCCH symbols but got %d symbols\n", memset(&x[q->cell.nof_ports], 0, sizeof(cf_t*) * (MAX_LAYERS - q->cell.nof_ports));
q->nof_symbols, n);
return LIBLTE_ERROR; /* extract symbols */
int n = regs_pdcch_get_offset(q->regs, sf_symbols, q->pdcch_symbols[0],
location.ncce * 9, PDCCH_FORMAT_NOF_REGS(location.L));
if (nof_symbols != n) {
fprintf(stderr, "Expected %d PDCCH symbols but got %d symbols\n", nof_symbols, n);
return ret;
} }
}
/* in control channels, only diversity is supported */ /* extract channel estimates */
if (q->cell.nof_ports == 1) { for (i = 0; i < q->cell.nof_ports; i++) {
/* no need for layer demapping */ n = regs_pdcch_get_offset(q->regs, ce[i], q->ce[i],
predecoding_single_zf(q->pdcch_symbols[0], q->ce[0], q->pdcch_d, location.ncce * 9, PDCCH_FORMAT_NOF_REGS(location.L));
q->nof_symbols); if (nof_symbols != n) {
} else { fprintf(stderr, "Expected %d PDCCH symbols but got %d symbols\n", nof_symbols, n);
predecoding_diversity_zf(q->pdcch_symbols[0], q->ce, x, q->cell.nof_ports, return ret;
q->nof_symbols); }
layerdemap_diversity(x, q->pdcch_d, q->cell.nof_ports, }
q->nof_symbols / q->cell.nof_ports);
}
DEBUG("pdcch d symbols: ", 0); /* in control channels, only diversity is supported */
if (VERBOSE_ISDEBUG()) { if (q->cell.nof_ports == 1) {
vec_fprint_c(stdout, q->pdcch_d, q->nof_symbols); /* no need for layer demapping */
} predecoding_single_zf(q->pdcch_symbols[0], q->ce[0], q->pdcch_d, nof_symbols);
} else {
predecoding_diversity_zf(q->pdcch_symbols[0], q->ce, x, q->cell.nof_ports, nof_symbols);
layerdemap_diversity(x, q->pdcch_d, q->cell.nof_ports, nof_symbols / q->cell.nof_ports);
}
/* demodulate symbols */ DEBUG("pdcch d symbols: ", 0);
demod_soft_sigma_set(&q->demod, 1.0); if (VERBOSE_ISDEBUG()) {
demod_soft_demodulate(&q->demod, q->pdcch_d, q->pdcch_llr, q->nof_symbols); vec_fprint_c(stdout, q->pdcch_d, nof_symbols);
}
DEBUG("llr: ", 0); /* demodulate symbols */
if (VERBOSE_ISDEBUG()) { demod_soft_sigma_set(&q->demod, 1.0);
vec_fprint_f(stdout, q->pdcch_llr, q->nof_bits); demod_soft_demodulate(&q->demod, q->pdcch_d, q->pdcch_llr, nof_symbols);
}
/* descramble */ DEBUG("llr: ", 0);
scrambling_f_offset(&q->seq_pdcch[nsubframe], q->pdcch_llr, 0, q->nof_bits); if (VERBOSE_ISDEBUG()) {
vec_fprint_f(stdout, q->pdcch_llr, q->e_bits);
}
return LIBLTE_SUCCESS; /* descramble */
scrambling_f_offset(&q->seq_pdcch[nsubframe], q->pdcch_llr, 72 * location.ncce, q->e_bits);
ret = LIBLTE_SUCCESS;
} else {
fprintf(stderr, "Illegal DCI message nCCE: %d, L: %d, nof_cce: %d\n", location.ncce, location.L, q->nof_cce);
}
} }
return LIBLTE_ERROR_INVALID_INPUTS; return ret;
} }
@ -487,91 +468,79 @@ static int dci_encode(pdcch_t *q, char *data, char *e, uint32_t nof_bits, uint32
} }
} }
void pdcch_reset(pdcch_t *q) {
/* should add <NIL> elements? Or maybe random bits to facilitate power estimation */
bzero(q->pdcch_e, q->nof_bits);
}
/** Encodes ONE DCI message and allocates the encoded bits to the dci_location_t indicated by /** Encodes ONE DCI message and allocates the encoded bits to the dci_location_t indicated by
* the parameter location. The CRC is scrambled with the RNTI parameter. * the parameter location. The CRC is scrambled with the RNTI parameter.
* This function can be called multiple times and encoded DCI messages will be stored in the * This function can be called multiple times and encoded DCI messages will be allocated to the
* pdcch_t structure. A final call to the function pdcch_gen_symbols() will generate and map the * sf_symbols buffer ready for transmission.
* symbols to the subframe for transmission.
* If the same location is provided in multiple messages, the encoded bits will be overwritten. * If the same location is provided in multiple messages, the encoded bits will be overwritten.
* *
* @TODO: Use a bitmask and CFI to ensure message locations are valid and old messages are not overwritten. * @TODO: Use a bitmask and CFI to ensure message locations are valid and old messages are not overwritten.
*/ */
int pdcch_encode_msg(pdcch_t *q, dci_msg_t *msg, dci_location_t location, uint16_t rnti) { int pdcch_encode(pdcch_t *q, dci_msg_t *msg, dci_location_t location, uint16_t rnti,
cf_t *sf_symbols[MAX_PORTS], uint32_t nsubframe, uint32_t cfi) {
int ret = LIBLTE_ERROR_INVALID_INPUTS; int ret = LIBLTE_ERROR_INVALID_INPUTS;
uint32_t i;
cf_t *x[MAX_LAYERS];
uint32_t nof_symbols;
if (q != NULL) { if (q != NULL &&
sf_symbols != NULL &&
nsubframe < 10 &&
cfi > 0 &&
cfi < 4 &&
dci_location_isvalid(&location))
{
set_cfi(q, cfi);
q->e_bits = PDCCH_FORMAT_NOF_BITS(location.L);
nof_symbols = q->e_bits/2;
ret = LIBLTE_ERROR; ret = LIBLTE_ERROR;
if (location.L < 4 && if (location.ncce + PDCCH_FORMAT_NOF_CCE(location.L) <= q->nof_cce &&
msg->nof_bits < DCI_MAX_BITS) msg->nof_bits < DCI_MAX_BITS)
{ {
INFO("Encoding DCI: Nbits: %d, E: %d, nCCE: %d, L: %d, RNTI: 0x%x\n", INFO("Encoding DCI: Nbits: %d, E: %d, nCCE: %d, L: %d, RNTI: 0x%x\n",
msg->nof_bits, msg->nof_bits, q->e_bits, location.ncce, location.L, rnti);
PDCCH_FORMAT_NOF_BITS(location.L),
location.ncce, location.L, rnti);
dci_encode(q, msg->data, &q->pdcch_e[72 * location.ncce], msg->nof_bits, dci_encode(q, msg->data, q->pdcch_e, msg->nof_bits, q->e_bits, rnti);
PDCCH_FORMAT_NOF_BITS(location.L), rnti);
/* 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));
scrambling_b_offset(&q->seq_pdcch[nsubframe], q->pdcch_e, 72 * location.ncce, q->e_bits);
DEBUG("Scrambling output: ", 0);
if (VERBOSE_ISDEBUG()) {
vec_fprint_b(stdout, q->pdcch_e, q->e_bits);
}
mod_modulate(&q->mod, q->pdcch_e, q->pdcch_d, q->e_bits);
/* layer mapping & precoding */
if (q->cell.nof_ports > 1) {
layermap_diversity(q->pdcch_d, x, q->cell.nof_ports, nof_symbols);
precoding_diversity(x, q->pdcch_symbols, q->cell.nof_ports, nof_symbols / q->cell.nof_ports);
} else {
memcpy(q->pdcch_symbols[0], q->pdcch_d, nof_symbols * sizeof(cf_t));
}
/* mapping to resource elements */
for (i = 0; i < q->cell.nof_ports; i++) {
regs_pdcch_put_offset(q->regs, q->pdcch_symbols[i], sf_symbols[i],
location.ncce * 9, PDCCH_FORMAT_NOF_REGS(location.L));
}
ret = LIBLTE_SUCCESS; ret = LIBLTE_SUCCESS;
} else { } else {
fprintf(stderr, "Illegal DCI message nCCE: %d, L: %d, nof_cce: %d\n", fprintf(stderr, "Illegal DCI message nCCE: %d, L: %d, nof_cce: %d\n", location.ncce, location.L, q->nof_cce);
location.ncce, location.L, q->nof_cce);
} }
} }
return ret; return ret;
} }
/** Converts the set of DCI messages encoded using the function pdcch_encode_msg()
* to symbols mapped to the subframe ready for transmission
*/
int pdcch_gen_symbols(pdcch_t *q, cf_t *slot_symbols[MAX_PORTS], uint32_t nsubframe, uint32_t cfi) {
int i;
/* Set pointers for layermapping & precoding */
cf_t *x[MAX_LAYERS];
if (q != 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));
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);
/* 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));
}
/* 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 {
return LIBLTE_ERROR_INVALID_INPUTS;
}
}

103
lte/phy/lib/phch/src/regs.c
Unescape Escape View File

@ -34,6 +34,9 @@
#include "liblte/phy/phch/regs.h" #include "liblte/phy/phch/regs.h"
#include "liblte/phy/utils/debug.h" #include "liblte/phy/utils/debug.h"
#define REG_IDX(r, i, n) r->k[i]+r->l*n*RE_X_RB
regs_reg_t *regs_find_reg(regs_t *h, uint32_t k, uint32_t l); regs_reg_t *regs_find_reg(regs_t *h, uint32_t k, uint32_t l);
int regs_put_reg(regs_reg_t *reg, int regs_put_reg(regs_reg_t *reg,
cf_t *reg_data, cf_t *reg_data,
@ -79,7 +82,8 @@ const unsigned char PDCCH_PERM[PDCCH_NCOLS] =
int regs_pdcch_init(regs_t *h) { int regs_pdcch_init(regs_t *h) {
int i, m, cfi, nof_ctrl_symbols; int i, m, cfi, nof_ctrl_symbols;
int ret = LIBLTE_ERROR; int ret = LIBLTE_ERROR;
int nrows, ndummy, j, k, kp; int nrows, ndummy, j;
uint32_t k, kp;
regs_reg_t **tmp = NULL; regs_reg_t **tmp = NULL;
bzero(&h->pdcch, sizeof(regs_ch_t)); bzero(&h->pdcch, sizeof(regs_ch_t));
@ -126,9 +130,10 @@ int regs_pdcch_init(regs_t *h) {
for (i = 0; i < nrows; i++) { for (i = 0; i < nrows; i++) {
if (i*PDCCH_NCOLS + PDCCH_PERM[j] >= ndummy) { if (i*PDCCH_NCOLS + PDCCH_PERM[j] >= ndummy) {
m = 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; if (k < h->cell.id) {
if (kp < 0) { kp = (h->pdcch[cfi].nof_regs + k-h->cell.id)%h->pdcch[cfi].nof_regs;
kp += h->pdcch[cfi].nof_regs; } else {
kp = (k-h->cell.id)%h->pdcch[cfi].nof_regs;
} }
h->pdcch[cfi].regs[m] = tmp[kp]; h->pdcch[cfi].regs[m] = tmp[kp];
k++; k++;
@ -163,28 +168,54 @@ int regs_pdcch_nregs(regs_t *h, uint32_t cfi) {
/** Copy quadruplets to REGs and cyclic shift them, according to the /** Copy quadruplets to REGs and cyclic shift them, according to the
* second part of 6.8.5 in 36.211 * 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_initiated) { int regs_pdcch_put_offset(regs_t *h, cf_t *pdcch_symbols, cf_t *slot_symbols, uint32_t start_reg, uint32_t nof_regs) {
if (h->cfi_initiated) {
if (start_reg + nof_regs <= h->pdcch[h->cfi].nof_regs) {
uint32_t i, k;
k = 0;
for (i=start_reg;i<start_reg+nof_regs;i++) {
regs_put_reg(h->pdcch[h->cfi].regs[i], &pdcch_symbols[k], slot_symbols, h->cell.nof_prb);
k += 4;
}
return k;
} else {
fprintf(stderr, "Out of range: start_reg + nof_reg must be lower than %d\n", h->pdcch[h->cfi].nof_regs);
return LIBLTE_ERROR;
}
} else {
fprintf(stderr, "Must call regs_set_cfi() first\n"); fprintf(stderr, "Must call regs_set_cfi() first\n");
return LIBLTE_ERROR; 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->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) { int regs_pdcch_put(regs_t *h, cf_t *pdcch_symbols, cf_t *slot_symbols) {
if (!h->cfi_initiated) { return regs_pdcch_put_offset(h, pdcch_symbols, slot_symbols, 0, h->pdcch[h->cfi].nof_regs);
}
int regs_pdcch_get_offset(regs_t *h, cf_t *slot_symbols, cf_t *pdcch_symbols, uint32_t start_reg, uint32_t nof_regs) {
if (h->cfi_initiated) {
if (start_reg + nof_regs <= h->pdcch[h->cfi].nof_regs) {
uint32_t i, k;
k = 0;
for (i=start_reg;i<start_reg + nof_regs;i++) {
regs_get_reg(h->pdcch[h->cfi].regs[i], slot_symbols, &pdcch_symbols[k], h->cell.nof_prb);
k += 4;
}
return k;
} else {
fprintf(stderr, "Out of range: start_reg + nof_reg must be lower than %d\n", h->pdcch[h->cfi].nof_regs);
return LIBLTE_ERROR;
}
} else {
fprintf(stderr, "Must call regs_set_cfi() first\n"); fprintf(stderr, "Must call regs_set_cfi() first\n");
return LIBLTE_ERROR; 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->cell.nof_prb);
} int regs_pdcch_get(regs_t *h, cf_t *slot_symbols, cf_t *pdcch_symbols) {
return h->pdcch[h->cfi].nof_regs*4; return regs_pdcch_get_offset(h, slot_symbols, pdcch_symbols, 0, h->pdcch[h->cfi].nof_regs);
} }
@ -201,7 +232,7 @@ int regs_pdcch_get(regs_t *h, cf_t *slot_symbols, cf_t *pdcch_symbols) {
*/ */
int regs_phich_init(regs_t *h) { int regs_phich_init(regs_t *h) {
float ng; float ng;
int i,ni,li,n[3],nreg,mi; uint32_t i, ni, li, n[3], nreg, mi;
regs_reg_t **regs_phich[3]; regs_reg_t **regs_phich[3];
int ret = LIBLTE_ERROR; int ret = LIBLTE_ERROR;
@ -306,7 +337,7 @@ clean_and_exit:
} }
void regs_phich_free(regs_t *h) { void regs_phich_free(regs_t *h) {
int i; uint32_t i;
if (h->phich) { if (h->phich) {
if (CP_ISEXT(h->cell.cp)) { if (CP_ISEXT(h->cell.cp)) {
h->ngroups_phich /= 2; h->ngroups_phich /= 2;
@ -321,7 +352,7 @@ void regs_phich_free(regs_t *h) {
} }
uint32_t regs_phich_nregs(regs_t *h) { uint32_t regs_phich_nregs(regs_t *h) {
int i; uint32_t i;
uint32_t n; uint32_t n;
n=0; n=0;
for (i=0;i<h->ngroups_phich;i++) { for (i=0;i<h->ngroups_phich;i++) {
@ -343,7 +374,7 @@ uint32_t regs_phich_ngroups(regs_t *h) {
* Returns the number of written symbols, or -1 on error * Returns the number of written symbols, or -1 on error
*/ */
int regs_phich_add(regs_t *h, cf_t phich_symbols[REGS_PHICH_NSYM], uint32_t ngroup, cf_t *slot_symbols) { int regs_phich_add(regs_t *h, cf_t phich_symbols[REGS_PHICH_NSYM], uint32_t ngroup, cf_t *slot_symbols) {
int i; uint32_t i;
if (ngroup >= h->ngroups_phich) { if (ngroup >= h->ngroups_phich) {
fprintf(stderr, "Error invalid ngroup %d\n", ngroup); fprintf(stderr, "Error invalid ngroup %d\n", ngroup);
return LIBLTE_ERROR_INVALID_INPUTS; return LIBLTE_ERROR_INVALID_INPUTS;
@ -364,7 +395,7 @@ int regs_phich_add(regs_t *h, cf_t phich_symbols[REGS_PHICH_NSYM], uint32_t ngro
* Returns the number of written symbols, or -1 on error * Returns the number of written symbols, or -1 on error
*/ */
int regs_phich_reset(regs_t *h, cf_t *slot_symbols) { int regs_phich_reset(regs_t *h, cf_t *slot_symbols) {
int i; uint32_t i;
uint32_t ngroup, ng; uint32_t ngroup, ng;
for (ngroup = 0;ngroup < h->ngroups_phich;CP_ISEXT(h->cell.cp)?ngroup+=2:ngroup++) { for (ngroup = 0;ngroup < h->ngroups_phich;CP_ISEXT(h->cell.cp)?ngroup+=2:ngroup++) {
if (CP_ISEXT(h->cell.cp)) { if (CP_ISEXT(h->cell.cp)) {
@ -386,7 +417,7 @@ int regs_phich_reset(regs_t *h, cf_t *slot_symbols) {
* Returns the number of written symbols, or -1 on error * 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], uint32_t ngroup) { int regs_phich_get(regs_t *h, cf_t *slot_symbols, cf_t phich_symbols[REGS_PHICH_NSYM], uint32_t ngroup) {
int i; uint32_t i;
if (ngroup >= h->ngroups_phich) { if (ngroup >= h->ngroups_phich) {
fprintf(stderr, "Error invalid ngroup %d\n", ngroup); fprintf(stderr, "Error invalid ngroup %d\n", ngroup);
return LIBLTE_ERROR_INVALID_INPUTS; return LIBLTE_ERROR_INVALID_INPUTS;
@ -421,7 +452,7 @@ 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 * 36.211 10.3 section 6.7.4
*/ */
int regs_pcfich_init(regs_t *h) { int regs_pcfich_init(regs_t *h) {
int i; uint32_t i;
uint32_t k_hat, k; uint32_t k_hat, k;
regs_ch_t *ch = &h->pcfich; regs_ch_t *ch = &h->pcfich;
@ -475,7 +506,7 @@ uint32_t regs_pcfich_nregs(regs_t *h) {
int regs_pcfich_put(regs_t *h, cf_t pcfich_symbols[REGS_PCFICH_NSYM], cf_t *slot_symbols) { int regs_pcfich_put(regs_t *h, cf_t pcfich_symbols[REGS_PCFICH_NSYM], cf_t *slot_symbols) {
regs_ch_t *rch = &h->pcfich; regs_ch_t *rch = &h->pcfich;
int i; uint32_t i;
for (i = 0; i < rch->nof_regs && i*REGS_RE_X_REG < REGS_PCFICH_NSYM; 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->cell.nof_prb); regs_put_reg(rch->regs[i], &pcfich_symbols[i*REGS_RE_X_REG], slot_symbols, h->cell.nof_prb);
} }
@ -489,7 +520,7 @@ int regs_pcfich_put(regs_t *h, cf_t pcfich_symbols[REGS_PCFICH_NSYM], cf_t *slot
*/ */
int regs_pcfich_get(regs_t *h, cf_t *slot_symbols, cf_t ch_data[REGS_PCFICH_NSYM]) { int regs_pcfich_get(regs_t *h, cf_t *slot_symbols, cf_t ch_data[REGS_PCFICH_NSYM]) {
regs_ch_t *rch = &h->pcfich; regs_ch_t *rch = &h->pcfich;
int i; uint32_t i;
for (i = 0; i < rch->nof_regs && i*REGS_RE_X_REG < REGS_PCFICH_NSYM; 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->cell.nof_prb); regs_get_reg(rch->regs[i], slot_symbols, &ch_data[i*REGS_RE_X_REG], h->cell.nof_prb);
} }
@ -516,7 +547,7 @@ 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, uint32_t k, uint32_t l) { regs_reg_t *regs_find_reg(regs_t *h, uint32_t k, uint32_t l) {
int i; uint32_t i;
for (i=0;i<h->nof_regs;i++) { for (i=0;i<h->nof_regs;i++) {
if (h->regs[i].l == l && h->regs[i].k0 == k) { if (h->regs[i].l == l && h->regs[i].k0 == k) {
return &h->regs[i]; return &h->regs[i];
@ -563,7 +594,7 @@ int regs_num_x_symbol(uint32_t symbol, uint32_t nof_port, lte_cp_t cp) {
* 36.211 Section 6.2.4 * 36.211 Section 6.2.4
*/ */
int regs_reg_init(regs_reg_t *reg, uint32_t symbol, uint32_t nreg, uint32_t k0, uint32_t maxreg, uint32_t vo) { int regs_reg_init(regs_reg_t *reg, uint32_t symbol, uint32_t nreg, uint32_t k0, uint32_t maxreg, uint32_t vo) {
int i, j, z; uint32_t i, j, z;
reg->l = symbol; reg->l = symbol;
reg->assigned = false; reg->assigned = false;
@ -643,10 +674,10 @@ int regs_set_cfi(regs_t *h, uint32_t cfi) {
*/ */
int regs_init(regs_t *h, phich_resources_t phich_res, phich_length_t phich_len, lte_cell_t cell) { 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 ret = LIBLTE_ERROR_INVALID_INPUTS;
int i, k; uint32_t i, k;
uint32_t j[4], jmax, prb; uint32_t j[4], jmax, prb;
uint32_t n[4], vo; uint32_t n[4], vo;
int max_ctrl_symbols; uint32_t max_ctrl_symbols;
if (h != NULL && if (h != NULL &&
lte_cell_isvalid(&cell)) lte_cell_isvalid(&cell))
@ -727,13 +758,11 @@ clean_and_exit:
return ret; return ret;
} }
#define REG_IDX(r, i, n) r->k[i]+r->l*n*RE_X_RB
/** /**
* Puts one REG data (4 symbols) in the slot symbols array * 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, uint32_t nof_prb) { int regs_put_reg(regs_reg_t *reg, cf_t *reg_data, cf_t *slot_symbols, uint32_t nof_prb) {
int i; uint32_t i;
for (i = 0; i < REGS_RE_X_REG; i++) { for (i = 0; i < REGS_RE_X_REG; i++) {
slot_symbols[REG_IDX(reg, i, nof_prb)] = reg_data[i]; slot_symbols[REG_IDX(reg, i, nof_prb)] = reg_data[i];
} }
@ -745,7 +774,7 @@ int regs_put_reg(regs_reg_t *reg, cf_t *reg_data, cf_t *slot_symbols, uint32_t n
* Used by PHICH * Used by PHICH
*/ */
int regs_add_reg(regs_reg_t *reg, cf_t *reg_data, cf_t *slot_symbols, uint32_t nof_prb) { int regs_add_reg(regs_reg_t *reg, cf_t *reg_data, cf_t *slot_symbols, uint32_t nof_prb) {
int i; uint32_t i;
for (i = 0; i < REGS_RE_X_REG; i++) { for (i = 0; i < REGS_RE_X_REG; i++) {
slot_symbols[REG_IDX(reg, i, nof_prb)] += reg_data[i]; slot_symbols[REG_IDX(reg, i, nof_prb)] += reg_data[i];
} }
@ -757,7 +786,7 @@ int regs_add_reg(regs_reg_t *reg, cf_t *reg_data, cf_t *slot_symbols, uint32_t n
* Reset REG data (4 symbols) in the slot symbols array * Reset REG data (4 symbols) in the slot symbols array
*/ */
int regs_reset_reg(regs_reg_t *reg, cf_t *slot_symbols, uint32_t nof_prb) { int regs_reset_reg(regs_reg_t *reg, cf_t *slot_symbols, uint32_t nof_prb) {
int i; uint32_t i;
for (i = 0; i < REGS_RE_X_REG; i++) { for (i = 0; i < REGS_RE_X_REG; i++) {
slot_symbols[REG_IDX(reg, i, nof_prb)] = 0; slot_symbols[REG_IDX(reg, i, nof_prb)] = 0;
} }
@ -768,7 +797,7 @@ int regs_reset_reg(regs_reg_t *reg, cf_t *slot_symbols, uint32_t nof_prb) {
* Gets one REG data (4 symbols) from the slot symbols array * 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, uint32_t nof_prb) { int regs_get_reg(regs_reg_t *reg, cf_t *slot_symbols, cf_t *reg_data, uint32_t nof_prb) {
int i; uint32_t i;
for (i = 0; i < REGS_RE_X_REG; i++) { for (i = 0; i < REGS_RE_X_REG; i++) {
reg_data[i] = slot_symbols[REG_IDX(reg, i, nof_prb)]; reg_data[i] = slot_symbols[REG_IDX(reg, i, nof_prb)];
} }

24
lte/phy/lib/phch/test/pdcch_file_test.c
Unescape Escape View File

@ -208,7 +208,6 @@ void base_free() {
int main(int argc, char **argv) { int main(int argc, char **argv) {
ra_pdsch_t ra_dl; ra_pdsch_t ra_dl;
int i; int i;
int nof_dcis;
int nof_frames; int nof_frames;
int ret; int ret;
dci_location_t locations[10]; dci_location_t locations[10];
@ -264,20 +263,19 @@ int main(int argc, char **argv) {
} }
} }
if (pdcch_extract_llr(&pdcch, fft_buffer, ce, nof_frames, cfi)) { uint16_t crc_rem = 0;
fprintf(stderr, "Error extracting LLRs\n"); for (i=0;i<nof_locations && crc_rem != rnti;i++) {
return -1; if (pdcch_extract_llr(&pdcch, fft_buffer, ce, locations[i], nof_frames, cfi)) {
fprintf(stderr, "Error extracting LLRs\n");
return -1;
}
if (pdcch_decode_msg(&pdcch, &dci_msg, Format1A, &crc_rem)) {
fprintf(stderr, "Error decoding DCI msg\n");
return -1;
}
} }
nof_dcis = pdcch_decode_msg(&pdcch, &dci_msg, locations, nof_locations, Format1A, rnti); if (crc_rem == rnti) {
if (nof_dcis < 0) {
fprintf(stderr, "Error decoding DCI messages\n");
return -1;
}
INFO("Received %d DCI messages\n", nof_dcis);
if (nof_dcis == 1) {
dci_msg_type_t type; dci_msg_type_t type;
if (dci_msg_get_type(&dci_msg, &type, cell.nof_prb, rnti, 1234)) { if (dci_msg_get_type(&dci_msg, &type, cell.nof_prb, rnti, 1234)) {
fprintf(stderr, "Can't get DCI message type\n"); fprintf(stderr, "Can't get DCI message type\n");

31
lte/phy/lib/phch/test/pdcch_test.c
Unescape Escape View File

@ -105,7 +105,7 @@ int test_dci_payload_size() {
int main(int argc, char **argv) { int main(int argc, char **argv) {
pdcch_t pdcch; pdcch_t pdcch;
dci_msg_t dci_tx[2], dci_rx[2]; dci_msg_t dci_tx[2], dci_rx[2], dci_tmp;
dci_location_t dci_locations[2]; dci_location_t dci_locations[2];
ra_pdsch_t ra_dl; ra_pdsch_t ra_dl;
regs_t regs; regs_t regs;
@ -173,16 +173,12 @@ int main(int argc, char **argv) {
dci_msg_pack_pdsch(&ra_dl, &dci_tx[1], Format1, cell.nof_prb, false); dci_msg_pack_pdsch(&ra_dl, &dci_tx[1], Format1, cell.nof_prb, false);
dci_location_set(&dci_locations[1], 0, 1); dci_location_set(&dci_locations[1], 0, 1);
pdcch_reset(&pdcch);
for (i=0;i<nof_dcis;i++) { for (i=0;i<nof_dcis;i++) {
if (pdcch_encode_msg(&pdcch, &dci_tx[i], dci_locations[i], 1234+i)) { if (pdcch_encode(&pdcch, &dci_tx[i], dci_locations[i], 1234+i, slot_symbols, 0, cfi)) {
fprintf(stderr, "Error encoding DCI message\n");
goto quit; goto quit;
} }
} }
if (pdcch_gen_symbols(&pdcch, slot_symbols, 0, cfi)) {
goto quit;
}
/* combine outputs */ /* combine outputs */
for (i = 1; i < cell.nof_ports; i++) { for (i = 1; i < cell.nof_ports; i++) {
@ -191,12 +187,21 @@ int main(int argc, char **argv) {
} }
} }
if (pdcch_extract_llr(&pdcch, slot_symbols[0], ce, 0, cfi)) { for (i=0;i<2;i++) {
goto quit; if (pdcch_extract_llr(&pdcch, slot_symbols[0], ce, dci_locations[i], 0, cfi)) {
} fprintf(stderr, "Error extracting LLRs\n");
goto quit;
for (i=0;i<nof_dcis;i++) { }
if (pdcch_decode_msg(&pdcch, &dci_rx[i], dci_locations, 2, Format1, 1234+i) < 0) { uint16_t crc_rem;
if (pdcch_decode_msg(&pdcch, &dci_tmp, Format1, &crc_rem)) {
fprintf(stderr, "Error decoding DCI message\n");
goto quit;
}
if (crc_rem >= 1234 && crc_rem < 1234 + nof_dcis) {
crc_rem -= 1234;
memcpy(&dci_rx[crc_rem], &dci_tmp, sizeof(dci_msg_t));
} else {
printf("Received invalid DCI CRC 0x%x\n", crc_rem);
goto quit; goto quit;
} }
} }

24
lte/phy/lib/phch/test/pdsch_file_test.c
Unescape Escape View File

@ -218,7 +218,6 @@ int main(int argc, char **argv) {
ra_pdsch_t ra_dl; ra_pdsch_t ra_dl;
ra_prb_t prb_alloc; ra_prb_t prb_alloc;
int i; int i;
int nof_dcis;
int nof_frames; int nof_frames;
int ret; int ret;
char *data; char *data;
@ -280,17 +279,20 @@ int main(int argc, char **argv) {
} }
} }
pdcch_extract_llr(&pdcch, fft_buffer, ce, nof_frames, cfi);
uint16_t crc_rem = 0;
nof_dcis = pdcch_decode_msg(&pdcch, &dci_msg, locations, nof_locations, Format1A, rnti); for (i=0;i<nof_locations && crc_rem != rnti;i++) {
if (nof_dcis < 0) { if (pdcch_extract_llr(&pdcch, fft_buffer, ce, locations[i], nof_frames, cfi)) {
fprintf(stderr, "Error decoding DCI messages\n"); fprintf(stderr, "Error extracting LLRs\n");
return -1; return -1;
}
if (pdcch_decode_msg(&pdcch, &dci_msg, Format1A, &crc_rem)) {
fprintf(stderr, "Error decoding DCI msg\n");
return -1;
}
} }
INFO("Received %d DCI messages\n", nof_dcis); if (crc_rem == rnti) {
if (nof_dcis == 1) {
dci_msg_type_t type; dci_msg_type_t type;
if (dci_msg_get_type(&dci_msg, &type, cell.nof_prb, rnti, 1234)) { if (dci_msg_get_type(&dci_msg, &type, cell.nof_prb, rnti, 1234)) {
fprintf(stderr, "Can't get DCI message type\n"); fprintf(stderr, "Can't get DCI message type\n");

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

@ -28,6 +28,7 @@
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <strings.h> #include <strings.h>
#include <assert.h>
#include "liblte/phy/resampling/decim.h" #include "liblte/phy/resampling/decim.h"
#include "liblte/phy/resampling/resample_arb.h" #include "liblte/phy/resampling/resample_arb.h"
@ -120,6 +121,8 @@ void sync_frame_run(sync_frame_t *q, cf_t *input) {
break; break;
} }
assert(q->peak_idx < TRACK_LEN);
track_idx = sync_track(&q->s, &input[q->peak_idx - TRACK_LEN]); track_idx = sync_track(&q->s, &input[q->peak_idx - TRACK_LEN]);
INFO("TRACK %3d: SF=%d. Previous idx is %d New Offset is %d\n", INFO("TRACK %3d: SF=%d. Previous idx is %d New Offset is %d\n",
@ -140,7 +143,7 @@ void sync_frame_run(sync_frame_t *q, cf_t *input) {
q->cur_cfo = (sync_get_cfo(&q->s) + q->frame_cnt * q->cur_cfo) / (q->frame_cnt + 1); q->cur_cfo = (sync_get_cfo(&q->s) + q->frame_cnt * q->cur_cfo) / (q->frame_cnt + 1);
/* compute cumulative moving average time offset */ /* compute cumulative moving average time offset */
q->timeoffset = (float) (track_idx - TRACK_LEN + q->timeoffset * q->frame_cnt) q->timeoffset = (float) ((float) track_idx - TRACK_LEN + q->timeoffset * q->frame_cnt)
/ (q->frame_cnt + 1); / (q->frame_cnt + 1);
q->last_found = q->frame_cnt; q->last_found = q->frame_cnt;

Write Preview
Loading…
Cancel
Save