Fixed naming convention in vec module. Separated viterbit and convolutional coder.

master
ismagom 11 years ago
parent a07f3966a3
commit f356937046

@ -42,5 +42,9 @@ add_executable(pss_scan_usrp pss_scan_usrp.c ../uhd/uhd_imp.cpp ../uhd/uhd_utils
target_link_libraries(pss_scan_usrp ${LIBRARIES} ${UHD_LIBRARIES}) target_link_libraries(pss_scan_usrp ${LIBRARIES} ${UHD_LIBRARIES})
include_directories(${UHD_INCLUDE_DIRS} ${CMAKE_CURRENT_SOURCE_DIR}/../uhd)
add_executable(mib_scan_usrp mib_scan_usrp.c ../uhd/uhd_imp.cpp ../uhd/uhd_utils.c)
target_link_libraries(mib_scan_usrp ${LIBRARIES} ${UHD_LIBRARIES})

@ -8,7 +8,7 @@
char *input_file_name = NULL; char *input_file_name = NULL;
int nof_slots=100; int nof_slots=100;
float corr_peak_threshold=15; float corr_peak_threshold=30;
int file_binary = 0; int file_binary = 0;
int force_N_id_2=-1; int force_N_id_2=-1;
int nof_ports = 1; int nof_ports = 1;
@ -94,7 +94,7 @@ int base_init() {
} }
} }
if (chest_init(&chest, CPNORM, 6, 1)) { if (chest_init(&chest, LINEAR, CPNORM, 6, 1)) {
fprintf(stderr, "Error initializing equalizer\n"); fprintf(stderr, "Error initializing equalizer\n");
return -1; return -1;
} }

@ -124,7 +124,7 @@ int main(int argc, char **argv) {
fprintf(stderr, "Error: initializing FFT\n"); fprintf(stderr, "Error: initializing FFT\n");
goto do_exit; goto do_exit;
} }
if (chest_init(&eq, cp, nof_prb, 1)) { if (chest_init(&eq, LINEAR, cp, nof_prb, 1)) {
fprintf(stderr, "Error initializing equalizer\n"); fprintf(stderr, "Error initializing equalizer\n");
goto do_exit; goto do_exit;
} }

@ -0,0 +1,592 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>
#include <math.h>
#include <sys/time.h>
#include <unistd.h>
#include "lte.h"
#define DISABLE_UHD
#ifndef DISABLE_UHD
#include "uhd.h"
#include "uhd_utils.h"
#endif
#define MHZ 1000000
#define SAMP_FREQ 1920000
#define RSSI_FS 1000000
#define FLEN 9600
#define FLEN_PERIOD 0.005
#define RSSI_DECIM 20
#define IS_SIGNAL(i) (10*log10f(rssi[i]) + 30 > rssi_threshold)
int band, earfcn=-1;
float find_threshold = 40.0, track_threshold = 8.0;
int earfcn_start=-1, earfcn_end = -1;
float rssi_threshold = -30.0;
int max_track_lost=9;
int nof_frames_find=8, nof_frames_track=100, nof_samples_rssi=50000;
int track_len=500;
int nof_ports;
cf_t *input_buffer, *fft_buffer, *ce[MAX_PORTS];
pbch_t pbch;
lte_fft_t fft;
chest_t chest;
sync_t sfind, strack;
float *cfo_v;
int *idx_v, *idx_valid, *t;
float *p2a_v;
void *uhd;
int nof_bands;
float gain = 20.0;
#define MAX_EARFCN 1000
lte_earfcn_t channels[MAX_EARFCN];
float rssi[MAX_EARFCN];
float rssi_d[MAX_EARFCN/RSSI_DECIM];
float freqs[MAX_EARFCN];
float cfo[MAX_EARFCN];
float p2a[MAX_EARFCN];
enum sync_state {INIT, FIND, TRACK, MIB, DONE};
void print_to_matlab();
void usage(char *prog) {
printf("Usage: %s [seRrFfTtgv] -b band\n", prog);
printf("\t-s earfcn_start [Default All]\n");
printf("\t-e earfcn_end [Default All]\n");
printf("\t-R rssi_nof_samples [Default %d]\n", nof_samples_rssi);
printf("\t-r rssi_threshold [Default %.2f dBm]\n", rssi_threshold);
printf("\t-F pss_find_nof_frames [Default %d]\n", nof_frames_find);
printf("\t-f pss_find_threshold [Default %.2f]\n", find_threshold);
printf("\t-T pss_track_nof_frames [Default %d]\n", nof_frames_track);
printf("\t-t pss_track_threshold [Default %.2f]\n", track_threshold);
printf("\t-l pss_track_len [Default %d]\n", track_len);
printf("\t-g gain [Default %.2f dB]\n", gain);
printf("\t-v [set verbose to debug, default none]\n");
}
void parse_args(int argc, char **argv) {
int opt;
while ((opt = getopt(argc, argv, "bseRrFfTtgv")) != -1) {
switch(opt) {
case 'b':
band = atoi(argv[optind]);
break;
case 's':
earfcn_start = atoi(argv[optind]);
break;
case 'e':
earfcn_end = atoi(argv[optind]);
break;
case 'R':
nof_samples_rssi = atoi(argv[optind]);
break;
case 'r':
rssi_threshold = -atof(argv[optind]);
break;
case 'F':
nof_frames_find = atoi(argv[optind]);
break;
case 'f':
find_threshold = atof(argv[optind]);
break;
case 'T':
nof_frames_track = atoi(argv[optind]);
break;
case 't':
track_threshold = atof(argv[optind]);
break;
case 'g':
gain = atof(argv[optind]);
break;
case 'v':
verbose++;
break;
default:
usage(argv[0]);
exit(-1);
}
}
}
int base_init(int frame_length) {
int i;
input_buffer = malloc(2 * frame_length * sizeof(cf_t));
if (!input_buffer) {
perror("malloc");
return -1;
}
fft_buffer = malloc(CPNORM_NSYMB * 72 * sizeof(cf_t));
if (!fft_buffer) {
perror("malloc");
return -1;
}
for (i=0;i<nof_ports;i++) {
ce[i] = malloc(CPNORM_NSYMB * 72 * sizeof(cf_t));
if (!ce[i]) {
perror("malloc");
return -1;
}
}
if (sync_init(&sfind, FLEN)) {
fprintf(stderr, "Error initiating PSS/SSS\n");
return -1;
}
if (sync_init(&strack, track_len)) {
fprintf(stderr, "Error initiating PSS/SSS\n");
return -1;
}
if (chest_init(&chest, LINEAR, CPNORM, 6, 1)) {
fprintf(stderr, "Error initializing equalizer\n");
return -1;
}
if (lte_fft_init(&fft, CPNORM, 6)) {
fprintf(stderr, "Error initializing FFT\n");
return -1;
}
idx_v = malloc(nof_frames_track * sizeof(int));
if (!idx_v) {
perror("malloc");
return -1;
}
idx_valid = malloc(nof_frames_track * sizeof(int));
if (!idx_valid) {
perror("malloc");
return -1;
}
t = malloc(nof_frames_track * sizeof(int));
if (!t) {
perror("malloc");
return -1;
}
cfo_v = malloc(nof_frames_track * sizeof(float));
if (!cfo_v) {
perror("malloc");
return -1;
}
p2a_v = malloc(nof_frames_track * sizeof(float));
if (!p2a_v) {
perror("malloc");
return -1;
}
bzero(cfo, sizeof(float) * MAX_EARFCN);
bzero(p2a, sizeof(float) * MAX_EARFCN);
/* open UHD device */
#ifndef DISABLE_UHD
printf("Opening UHD device...\n");
if (uhd_open("",&uhd)) {
fprintf(stderr, "Error opening uhd\n");
return -1;
}
#endif
return 0;
}
void base_free() {
int i;
#ifndef DISABLE_UHD
uhd_close(&uhd);
#endif
sync_free(&sfind);
sync_free(&strack);
lte_fft_free(&fft);
chest_free(&chest);
free(input_buffer);
free(fft_buffer);
for (i=0;i<nof_ports;i++) {
free(ce[i]);
}
free(idx_v);
free(idx_valid);
free(t);
free(cfo_v);
free(p2a_v);
}
float mean_valid(int *idx_v, float *x, int nof_frames) {
int i;
float mean = 0;
int n = 0;
for (i=0;i<nof_frames;i++) {
if (idx_v[i] != -1) {
mean += x[i];
n++;
}
}
if (n > 0) {
return mean/n;
} else {
return 0.0;
}
}
int preprocess_idx(int *in, int *out, int *period, int len) {
int i, n;
n=0;
for (i=0;i<len;i++) {
if (in[i] != -1) {
out[n] = in[i];
period[n] = i;
n++;
}
}
return n;
}
int rssi_scan() {
int n=0;
int i;
if (nof_bands > 100) {
/* scan every Mhz, that is 10 freqs */
for (i=0;i<nof_bands;i+=RSSI_DECIM) {
freqs[n] = channels[i].fd * MHZ;
n++;
}
#ifndef DISABLE_UHD
if (uhd_rssi_scan(uhd, freqs, rssi_d, n, (double) RSSI_FS, nof_samples_rssi)) {
fprintf(stderr, "Error while doing RSSI scan\n");
return -1;
}
#endif
/* linearly interpolate the rssi vector */
interp_linear_f(rssi_d, rssi, RSSI_DECIM, n);
} else {
for (i=0;i<nof_bands;i++) {
freqs[i] = channels[i].fd * MHZ;
}
#ifndef DISABLE_UHD
if (uhd_rssi_scan(uhd, freqs, rssi, nof_bands, (double) RSSI_FS, nof_samples_rssi)) {
fprintf(stderr, "Error while doing RSSI scan\n");
return -1;
}
#endif
n = nof_bands;
}
return n;
}
int mib_decoder_init(int cell_id) {
if (chest_ref_LTEDL(&chest, cell_id)) {
fprintf(stderr, "Error initializing reference signal\n");
return -1;
}
if (pbch_init(&pbch, cell_id, CPNORM)) {
fprintf(stderr, "Error initiating PBCH\n");
return -1;
}
DEBUG("PBCH initiated cell_id=%d\n", cell_id);
return 0;
}
int mib_decoder_run(cf_t *input, pbch_mib_t *mib) {
int i;
lte_fft_run(&fft, input, fft_buffer);
/* Get channel estimates for each port */
for (i=0;i<nof_ports;i++) {
chest_ce_slot_port(&chest, fft_buffer, ce[i], 1, 0);
}
DEBUG("Decoding PBCH\n", 0);
return pbch_decode(&pbch, fft_buffer, ce, nof_ports, 6, 1, mib);
}
int main(int argc, char **argv) {
int frame_cnt, valid_frames;
int freq;
int cell_id;
float max_peak_to_avg;
float sfo;
int find_idx, track_idx, last_found;
enum sync_state state;
int n;
int mib_attempts;
int nslot;
pbch_mib_t mib;
if (argc < 3) {
usage(argv[0]);
exit(-1);
}
parse_args(argc,argv);
if (base_init(FLEN)) {
fprintf(stderr, "Error initializing memory\n");
exit(-1);
}
sync_pss_det_peakmean(&sfind);
sync_pss_det_peakmean(&strack);
nof_bands = lte_band_get_fd_band(band, channels, earfcn_start, earfcn_end, MAX_EARFCN);
printf("RSSI scan: %d freqs in band %d, RSSI threshold %.2f dBm\n", nof_bands, band, rssi_threshold);
n = rssi_scan();
if (n == -1) {
exit(-1);
}
printf("\nDone. Starting PSS search on %d channels\n", n);
usleep(500000);
INFO("Setting sampling frequency %.2f MHz\n", (float) SAMP_FREQ/MHZ);
#ifndef DISABLE_UHD
uhd_set_rx_srate(uhd, SAMP_FREQ);
uhd_set_rx_gain(uhd, gain);
#endif
print_to_matlab();
freq=0;
state = INIT;
nslot = 0;
sfo = 0;
find_idx = 0;
frame_cnt = 0;
while(freq<nof_bands) {
/* scan only bands above rssi_threshold */
if (!IS_SIGNAL(freq)) {
INFO("[%3d/%d]: Skipping EARFCN %d %.2f MHz RSSI %.2f dB\n", freq, nof_bands,
channels[freq].id, channels[freq].fd,10*log10f(rssi[freq]) + 30);
freq++;
} else {
if (state != INIT && state != DONE) {
#ifndef DISABLE_UHD
uhd_recv(uhd, &input_buffer[FLEN], FLEN, 1);
#endif
}
switch(state) {
case INIT:
DEBUG("Stopping receiver...\n",0);
#ifndef DISABLE_UHD
uhd_stop_rx_stream(uhd);
/* set freq */
uhd_set_rx_freq(uhd, (double) channels[freq].fd * MHZ);
uhd_rx_wait_lo_locked(uhd);
DEBUG("Set freq to %.3f MHz\n", (double) channels[freq].fd);
DEBUG("Starting receiver...\n",0);
uhd_start_rx_stream(uhd);
#endif
/* init variables */
frame_cnt = 0;
max_peak_to_avg = -99;
cell_id = -1;
/* receive first frame */
#ifndef DISABLE_UHD
uhd_recv(uhd, input_buffer, FLEN, 1);
#endif
/* set find_threshold and go to FIND state */
sync_set_threshold(&sfind, find_threshold);
sync_force_N_id_2(&sfind, -1);
state = FIND;
break;
case FIND:
/* find peak in all frame */
find_idx = sync_run(&sfind, input_buffer, FLEN);
DEBUG("[%3d/%d]: PAR=%.2f\n", freq, nof_bands, sync_get_peak_to_avg(&sfind));
if (find_idx != -1) {
/* if found peak, go to track and set lower threshold */
frame_cnt = -1;
last_found = 0;
max_peak_to_avg = -1;
sync_set_threshold(&strack, track_threshold);
sync_force_N_id_2(&strack, sync_get_N_id_2(&sfind));
cell_id = sync_get_cell_id(&strack);
mib_decoder_init(cell_id);
state = TRACK;
INFO("[%3d/%d]: EARFCN %d Freq. %.2f MHz PSS found PAR %.2f dB\n", freq, nof_bands,
channels[freq].id, channels[freq].fd,
10*log10f(sync_get_peak_to_avg(&sfind)));
} else {
if (frame_cnt >= nof_frames_find) {
state = INIT;
freq++;
}
}
break;
case TRACK:
INFO("Tracking PSS find_idx %d offset %d\n", find_idx, find_idx + track_len);
track_idx = sync_run(&strack, input_buffer, FLEN + find_idx - track_len);
p2a_v[frame_cnt] = sync_get_peak_to_avg(&strack);
/* save cell id for the best peak-to-avg */
if (p2a_v[frame_cnt] > max_peak_to_avg) {
max_peak_to_avg = p2a_v[frame_cnt];
cell_id = sync_get_cell_id(&strack);
}
if (track_idx != -1) {
cfo_v[frame_cnt] = sync_get_cfo(&strack);
last_found = frame_cnt;
find_idx += track_idx - track_len;
idx_v[frame_cnt] = find_idx;
nslot = sync_get_slot_id(&strack);
} else {
idx_v[frame_cnt] = -1;
cfo_v[frame_cnt] = 0.0;
}
/* if we missed to many PSS it is not a cell, next freq */
if (frame_cnt - last_found > max_track_lost) {
INFO("\n[%3d/%d]: EARFCN %d Freq. %.2f MHz %d frames lost\n", freq, nof_bands,
channels[freq].id, channels[freq].fd, frame_cnt - last_found);
state = INIT;
freq++;
} else if (frame_cnt >= nof_frames_track) {
state = MIB;
nslot=(nslot+10)%20;
}
break;
case MIB:
INFO("Finding MIB at freq %.2f Mhz\n", channels[freq].fd);
cfo[freq] = mean_valid(idx_v, cfo_v, frame_cnt);
p2a[freq] = mean_valid(idx_v, p2a_v, frame_cnt);
valid_frames = preprocess_idx(idx_v, idx_valid, t, frame_cnt);
sfo = sfo_estimate_period(idx_valid, t, valid_frames, FLEN_PERIOD);
// TODO: Correct SFO
// Correct CFO
INFO("Correcting CFO=%.4f\n", cfo[freq]);
nco_cexp_f_direct(&input_buffer[FLEN], -cfo[freq]/128, FLEN);
if (nslot == 10) {
if (mib_decoder_run(&input_buffer[FLEN+find_idx+FLEN/10], &mib)) {
INFO("MIB detected attempt=%d\n", mib_attempts);
state = DONE;
} else {
INFO("MIB not detected attempt=%d\n", mib_attempts);
if (mib_attempts >= 20) {
freq++;
state = INIT;
}
}
mib_attempts++;
} else {
nslot = (nslot+10)%20;
}
break;
case DONE:
printf("\n[%3d/%d]: FOUND EARFCN %d Freq. %.2f MHz. "
"PAR %2.2f dB, CFO=%+.2f KHz, SFO=%+2.3f KHz, CELL_ID=%3d\n", freq, nof_bands,
channels[freq].id, channels[freq].fd,
10*log10f(p2a[freq]), cfo[freq] * 15, sfo / 1000, cell_id);
pbch_mib_fprint(stdout, &mib);
state = INIT;
freq++;
break;
}
/** FIXME: This is not necessary at all */
if (state == TRACK || (state == FIND && frame_cnt)) {
memcpy(input_buffer, &input_buffer[FLEN], FLEN * sizeof(cf_t));
}
frame_cnt++;
}
}
print_to_matlab();
base_free();
printf("\n\nDone\n");
exit(0);
}
void print_to_matlab() {
int i;
FILE *f = fopen("output.m", "w");
if (!f) {
perror("fopen");
exit(-1);
}
fprintf(f, "fd=[");
for (i=0;i<nof_bands;i++) {
fprintf(f, "%g, ", channels[i].fd);
}
fprintf(f, "];\n");
fprintf(f, "rssi=[");
for (i=0;i<nof_bands;i++) {
fprintf(f, "%g, ", rssi[i]);
}
fprintf(f, "];\n");
fprintf(f, "rssi_d=[");
for (i=0;i<nof_bands/RSSI_DECIM;i++) {
fprintf(f, "%g, ", rssi_d[i]);
}
fprintf(f, "];\n");
/*
fprintf(f, "cfo=[");
for (i=0;i<nof_bands;i++) {
if (IS_SIGNAL(i)) {
fprintf(f, "%g, ", cfo[i]);
} else {
fprintf(f, "NaN, ");
}
}
fprintf(f, "];\n");
*/
fprintf(f, "p2a=[");
for (i=0;i<nof_bands;i++) {
if (IS_SIGNAL(i)) {
fprintf(f, "%g, ", p2a[i]);
} else {
fprintf(f, "0, ");
}
}
fprintf(f, "];\n");
fprintf(f, "clf;\n\n");
fprintf(f, "subplot(1,2,1)\n");
fprintf(f, "plot(fd, 10*log10(rssi)+30)\n");
fprintf(f, "grid on; xlabel('f [Mhz]'); ylabel('RSSI [dBm]');\n");
fprintf(f, "title('RSSI Estimation')\n");
fprintf(f, "subplot(1,2,2)\n");
fprintf(f, "plot(fd, p2a)\n");
fprintf(f, "grid on; xlabel('f [Mhz]'); ylabel('Peak-to-Avg [dB]');\n");
fprintf(f, "title('PSS Correlation')\n");
/*
fprintf(f, "subplot(1,3,3)\n");
fprintf(f, "plot(fd, cfo)\n");
fprintf(f, "grid on; xlabel('f [Mhz]'); ylabel(''); axis([min(fd) max(fd) -0.5 0.5]);\n");
fprintf(f, "title('CFO Estimation')\n");
*/
fprintf(f, "drawnow;\n");
fclose(f);
}

@ -286,6 +286,10 @@ int main(int argc, char **argv) {
freq=0; freq=0;
state = INIT; state = INIT;
find_idx = 0;
max_peak_to_avg = 0;
last_found = 0;
frame_cnt = 0;
while(freq<nof_bands) { while(freq<nof_bands) {
/* scan only bands above rssi_threshold */ /* scan only bands above rssi_threshold */
if (!IS_SIGNAL(freq)) { if (!IS_SIGNAL(freq)) {

@ -107,7 +107,7 @@ int main(int argc, char **argv) {
rssi[i]=0; rssi[i]=0;
while(frame_cnt < nof_slots) { while(frame_cnt < nof_slots) {
nsamples += uhd_recv(uhd, input_buffer, 1920, 1); nsamples += uhd_recv(uhd, input_buffer, 1920, 1);
rssi[i] += vec_power(input_buffer, 1920); rssi[i] += vec_avg_power_cf(input_buffer, 1920);
frame_cnt++; frame_cnt++;
} }
printf("[%3d/%d]: Scanning earfcn %d freq %.2f MHz RSSI %.2f dBm\n", i, nof_bands, printf("[%3d/%d]: Scanning earfcn %d freq %.2f MHz RSSI %.2f dBm\n", i, nof_bands,

@ -123,7 +123,7 @@ int main(int argc, char **argv) {
demod_soft_alg_set(&demod, APPROX); demod_soft_alg_set(&demod, APPROX);
demod_soft_sigma_set(&demod, var); demod_soft_sigma_set(&demod, var);
viterbi_init(&dec, CONVCODER_37, cod.poly, frame_length, tail_biting); viterbi_init(&dec, viterbi_37, cod.poly, frame_length, tail_biting);
/* read all file or nof_frames */ /* read all file or nof_frames */
frame_cnt = 0; frame_cnt = 0;
@ -135,7 +135,7 @@ int main(int argc, char **argv) {
data_tx[i] = message[i]; data_tx[i] = message[i];
} }
conv_encode(&cod, data_tx, symbols); convcoder_encode(&cod, data_tx, symbols);
bit_fprint(stdout, symbols, 120); bit_fprint(stdout, symbols, 120);

@ -27,6 +27,9 @@
typedef _Complex float cf_t; /* this is only a shortcut */ 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);
/** This is an OFDM channel estimator. /** This is an OFDM channel estimator.
* It works with any reference signal pattern, provided by the object * It works with any reference signal pattern, provided by the object
* refsignal_t * refsignal_t
@ -41,9 +44,10 @@ typedef struct {
int nof_prb; int nof_prb;
lte_cp_t cp; lte_cp_t cp;
refsignal_t refsignal[MAX_PORTS][NSLOTS_X_FRAME]; refsignal_t refsignal[MAX_PORTS][NSLOTS_X_FRAME];
interpolate_fnc_t interp;
}chest_t; }chest_t;
int chest_init(chest_t *q, lte_cp_t cp, int nof_prb, int nof_ports); int chest_init(chest_t *q, chest_interp_t interp, lte_cp_t cp, int nof_prb, int nof_ports);
void chest_free(chest_t *q); void chest_free(chest_t *q);
int chest_ref_LTEDL_slot_port(chest_t *q, int port, int nslot, int cell_id); int chest_ref_LTEDL_slot_port(chest_t *q, int port, int nslot, int cell_id);
@ -68,20 +72,18 @@ typedef struct {
chest_t obj; chest_t obj;
struct chest_init { struct chest_init {
int nof_symbols; // 7 for normal cp, 6 for extended int nof_symbols; // 7 for normal cp, 6 for extended
int port_id;
int nof_ports; int nof_ports;
int cell_id;
int nof_prb; int nof_prb;
int ntime; int cell_id; // set to -1 to init at runtime
int nfreq;
} init; } init;
cf_t *input; cf_t *input;
int in_len; int in_len;
struct chest_ctrl_in { struct chest_ctrl_in {
int slot_id; // slot id in the 10ms frame int slot_id; // slot id in the 10ms frame
int cell_id;
} ctrl_in; } ctrl_in;
cf_t *output; cf_t *output[MAX_PORTS];
int *out_len; int out_len[MAX_PORTS];
}chest_hl; }chest_hl;
#define DEFAULT_FRAME_SIZE 2048 #define DEFAULT_FRAME_SIZE 2048

@ -34,10 +34,11 @@ typedef struct {
} ctrl_in; } ctrl_in;
cf* output; cf* output;
int* out_len; int out_len;
}ch_awgn_hl; }ch_awgn_hl;
int ch_awgn_initialize(ch_awgn_hl* hl); int ch_awgn_initialize(ch_awgn_hl* hl);
int ch_awgn_work(ch_awgn_hl* hl); int ch_awgn_work(ch_awgn_hl* hl);
int ch_awgn_stop(ch_awgn_hl* hl);
#endif #endif

@ -19,27 +19,9 @@
#ifndef CONVCODER_ #ifndef CONVCODER_
#define CONVCODER_ #define CONVCODER_
#include <stdbool.h> #include <stdbool.h>
typedef enum {
CONVCODER_27, CONVCODER_29, CONVCODER_37, CONVCODER_39
}viterbi_type_t;
typedef struct {
void *ptr;
int R;
int K;
unsigned int framebits;
bool tail_biting;
int poly[3];
int (*decode) (void*, float*, char*);
void (*free) (void*);
}viterbi_t;
int viterbi_init(viterbi_t *q, viterbi_type_t type, int poly[3], int framebits, bool tail_bitting);
void viterbi_free(viterbi_t *q);
int viterbi_decode(viterbi_t *q, float *symbols, char *data);
typedef struct { typedef struct {
int R; int R;
@ -49,6 +31,29 @@ typedef struct {
bool tail_biting; bool tail_biting;
}convcoder_t; }convcoder_t;
int conv_encode(convcoder_t *q, char *input, char *output); int convcoder_encode(convcoder_t *q, char *input, char *output);
/* High-level API */
typedef struct {
convcoder_t obj;
struct convcoder_ctrl_in {
int rate;
int constraint_length;
int tail_bitting;
int generator_0;
int generator_1;
int generator_2;
int frame_length;
} ctrl_in;
char *input;
int in_len;
char *output;
int out_len;
}convcoder_hl;
int convcoder_initialize(convcoder_hl* h);
int convcoder_work(convcoder_hl* hl);
int convcoder_stop(convcoder_hl* h);
#endif #endif

@ -0,0 +1,66 @@
/*
* Copyright (c) 2013, Ismael Gomez-Miguelez <gomezi@tcd.ie>.
* This file is part of OSLD-lib (http://https://github.com/ismagom/osld-lib)
*
* OSLD-lib is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* OSLD-lib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with OSLD-lib. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef VITERBI_
#define VITERBI_
#include <stdbool.h>
typedef enum {
viterbi_27, viterbi_29, viterbi_37, viterbi_39
}viterbi_type_t;
typedef struct {
void *ptr;
int R;
int K;
unsigned int framebits;
bool tail_biting;
int poly[3];
int (*decode) (void*, float*, char*);
void (*free) (void*);
}viterbi_t;
int viterbi_init(viterbi_t *q, viterbi_type_t type, int poly[3], int framebits, bool tail_bitting);
void viterbi_free(viterbi_t *q);
int viterbi_decode(viterbi_t *q, float *symbols, char *data);
/* High-level API */
typedef struct {
viterbi_t obj;
struct viterbi_init {
int rate;
int constraint_length;
int tail_bitting;
int generator_0;
int generator_1;
int generator_2;
int frame_length;
} init;
float *input;
int in_len;
char *output;
int out_len;
}viterbi_hl;
int viterbi_initialize(viterbi_hl* h);
int viterbi_work(viterbi_hl* hl);
int viterbi_stop(viterbi_hl* h);
#endif

@ -50,7 +50,7 @@ typedef struct {
int nbits; // Number of bits to generate int nbits; // Number of bits to generate
} ctrl_in; } ctrl_in;
char* output; char* output;
int* out_len; int out_len;
}binsource_hl; }binsource_hl;
int binsource_initialize(binsource_hl* h); int binsource_initialize(binsource_hl* h);

@ -48,7 +48,7 @@ typedef struct {
int nsamples; // Number of samples to read int nsamples; // Number of samples to read
} ctrl_in; } ctrl_in;
void* output; void* output;
int* out_len; int out_len;
}filesource_hl; }filesource_hl;
int filesource_initialize(filesource_hl* h); int filesource_initialize(filesource_hl* h);

@ -41,6 +41,7 @@
#include "channel/ch_awgn.h" #include "channel/ch_awgn.h"
#include "fec/viterbi.h"
#include "fec/convcoder.h" #include "fec/convcoder.h"
#include "fec/crc.h" #include "fec/crc.h"

@ -48,11 +48,12 @@ typedef struct {
int in_len; int in_len;
char* output; char* output;
int *out_len; int out_len;
}demod_hard_hl; }demod_hard_hl;
int demod_hard_initialize(demod_hard_hl* hl); int demod_hard_initialize(demod_hard_hl* hl);
int demod_hard_work(demod_hard_hl* hl); int demod_hard_work(demod_hard_hl* hl);
int demod_hard_stop(demod_hard_hl* hl);
#endif #endif

@ -57,7 +57,7 @@ typedef struct {
}ctrl_in; }ctrl_in;
float* output; float* output;
int *out_len; int out_len;
}demod_soft_hl; }demod_soft_hl;

@ -39,7 +39,7 @@ typedef struct {
int in_len; int in_len;
cf* output; cf* output;
int *out_len; int out_len;
}mod_hl; }mod_hl;
int mod_initialize(mod_hl* hl); int mod_initialize(mod_hl* hl);

@ -25,6 +25,7 @@
#include "scrambling/scrambling.h" #include "scrambling/scrambling.h"
#include "ratematching/rm_conv.h" #include "ratematching/rm_conv.h"
#include "fec/convcoder.h" #include "fec/convcoder.h"
#include "fec/viterbi.h"
#include "fec/crc.h" #include "fec/crc.h"
#define PBCH_RE_CPNORM 240 #define PBCH_RE_CPNORM 240

@ -36,7 +36,7 @@ typedef struct {
int S; int S;
} ctrl_in; } ctrl_in;
void *output; void *output;
int *out_len; int out_len;
}rm_conv_hl; }rm_conv_hl;
int rm_conv_initialize(rm_conv_hl* h); int rm_conv_initialize(rm_conv_hl* h);

@ -59,7 +59,7 @@ typedef struct {
int subframe; int subframe;
} ctrl_in; } ctrl_in;
void *output; void *output;
int *out_len; int out_len;
}scrambling_hl; }scrambling_hl;
#endif #endif

@ -114,7 +114,7 @@ typedef struct {
float manual_cfo; float manual_cfo;
} ctrl_in; } ctrl_in;
cf_t *output; cf_t *output;
int *out_len; int out_len;
}pss_synch_hl; }pss_synch_hl;
#define DEFAULT_FRAME_SIZE 2048 #define DEFAULT_FRAME_SIZE 2048

@ -21,24 +21,42 @@
#include <stdio.h> #include <stdio.h>
int sum_i(int *x, int len); typedef _Complex float cf_t;
float sum_r(float *x, int len);
_Complex float sum_c(_Complex float *x, int len); /** Return the sum of all the elements */
int vec_acc_ii(int *x, int len);
float vec_acc_ff(float *x, int len);
cf_t vec_acc_cc(cf_t *x, int len);
void *vec_malloc(int size); void *vec_malloc(int size);
void vec_fprint_c(FILE *stream, _Complex float *x, int len);
/* print vectors */
void vec_fprint_c(FILE *stream, cf_t *x, int len);
void vec_fprint_f(FILE *stream, float *x, int len); void vec_fprint_f(FILE *stream, float *x, int len);
void vec_fprint_i(FILE *stream, int *x, int len); void vec_fprint_i(FILE *stream, int *x, int len);
/* sum two vectors */
void vec_sum_ch(char *z, char *x, char *y, int len); void vec_sum_ch(char *z, char *x, char *y, int len);
void vec_sum_c(_Complex float *z, _Complex float *x, _Complex float *y, int len); void vec_sum_ccc(cf_t *z, cf_t *x, cf_t *y, int len);
void vec_mult_c_r(_Complex float *x,_Complex float *y, float h, int len);
void vec_mult_c(_Complex float *x,_Complex float *y, _Complex float h, int len); /* scalar product */
void vec_conj(_Complex float *x, _Complex float *y, int len); void vec_sc_prod_cfc(cf_t *x, float h, cf_t *z, int len);
float vec_power(_Complex float *x, int len); void vec_sc_prod_ccc(cf_t *x, cf_t h, cf_t *z, int len);
void vec_dot_prod(_Complex float *x,_Complex float *y, _Complex float *z, int len);
void vec_dot_prod_u(_Complex float *x,_Complex float *y, _Complex float *z, int len); /* dot product */
void vec_max(float *x, float *max, int *pos, int len); void vec_dot_prod_ccc(cf_t *x, cf_t *y, cf_t *z, int len);
void vec_abs(_Complex float *x, float *abs, int len); void vec_dot_prod_ccc_unalign(cf_t *x, cf_t *y, cf_t *z, int len);
/* conjugate */
void vec_conj_cc(cf_t *x, cf_t *y, int len);
/* average vector power */
float vec_avg_power_cf(cf_t *x, int len);
/* return the index of the maximum value in the vector */
int vec_max_fi(float *x, int len);
/* magnitude of each vector element */
void vec_abs_cf(cf_t *x, float *abs, int len);
#endif #endif

@ -80,8 +80,8 @@ void chest_ce_ref(chest_t *q, cf_t *input, int nslot, int port_id, int nref) {
channel_ref = input[SAMPLE_IDX(q->nof_prb, tidx, fidx)]; channel_ref = input[SAMPLE_IDX(q->nof_prb, tidx, fidx)];
q->refsignal[port_id][nslot].refs[nref].recv_simbol = channel_ref; q->refsignal[port_id][nslot].refs[nref].recv_simbol = channel_ref;
DEBUG("Reference %d pos (%d,%d)=%d %.2f/%.2f=%.2f %.2f/%.2f=%.2f\n", nref, tidx, fidx, SAMPLE_IDX(q->nof_prb, tidx, fidx), DEBUG("Reference %2d pos (%2d,%2d)=%3d %.2f dB %.2f/%.2f=%.2f\n", nref, tidx, fidx, SAMPLE_IDX(q->nof_prb, tidx, fidx),
cabsf(channel_ref),cabsf(known_ref),cabsf(channel_ref/known_ref), 10*log10f(cabsf(channel_ref/known_ref)),
cargf(channel_ref)/M_PI,cargf(known_ref)/M_PI,cargf(channel_ref/known_ref)/M_PI); cargf(channel_ref)/M_PI,cargf(known_ref)/M_PI,cargf(channel_ref/known_ref)/M_PI);
/* FIXME: compare with treshold */ /* FIXME: compare with treshold */
if (channel_ref != 0) { if (channel_ref != 0) {
@ -141,7 +141,7 @@ void chest_ce_slot(chest_t *q, cf_t *input, cf_t **ce, int nslot) {
} }
} }
int chest_init(chest_t *q, lte_cp_t cp, int nof_prb, int nof_ports) { 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) { if (nof_ports > MAX_PORTS) {
fprintf(stderr, "Error: Maximum ports %d\n", MAX_PORTS); fprintf(stderr, "Error: Maximum ports %d\n", MAX_PORTS);
@ -154,6 +154,11 @@ int chest_init(chest_t *q, lte_cp_t cp, int nof_prb, int nof_ports) {
q->cp = cp; q->cp = cp;
q->nof_prb = nof_prb; q->nof_prb = nof_prb;
switch(interp) {
case LINEAR:
q->interp = interp_linear_offset;
}
INFO("Initializing channel estimator size %dx%d, nof_ports=%d\n", INFO("Initializing channel estimator size %dx%d, nof_ports=%d\n",
q->nof_symbols, nof_prb, nof_ports); q->nof_symbols, nof_prb, nof_ports);
@ -222,50 +227,45 @@ int chest_ref_symbols(chest_t *q, int port_id, int nslot, int l[2]) {
*/ */
int chest_initialize(chest_hl* h) { int chest_initialize(chest_hl* h) {
if (!h->init.ntime) {
h->init.ntime = 7;
}
if (!h->init.nfreq) {
h->init.nfreq = 10;
}
if (!h->init.nof_symbols) { if (!h->init.nof_symbols) {
h->init.nof_symbols = CPNORM_NSYMB; // Normal CP h->init.nof_symbols = CPNORM_NSYMB; // Normal CP
} }
if (!h->init.port_id) {
h->init.port_id = 0;
}
if (!h->init.cell_id) {
h->init.cell_id = 0;
}
if (!h->init.nof_prb) { if (!h->init.nof_prb) {
h->init.nof_prb = 6; h->init.nof_prb = 6;
} }
/* if (chest_LTEDL_init(&h->obj, h->init.ntime, h->init.nfreq, if (chest_init(&h->obj, LINEAR, (h->init.nof_symbols==CPNORM_NSYMB)?CPNORM:CPEXT,
h->init.nof_symbols==CPNORM_NSYMB, h->init.cell_id, h->init.nof_prb)) { h->init.nof_prb, h->init.nof_ports)) {
fprintf(stderr, "Error initializing equalizer\n");
return -1; 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; return 0;
} }
/** This function can be called in a subframe (1ms) or slot basis (0.5ms) for LTE */ /** This function must be called in an slot basis (0.5ms) for LTE */
int chest_work(chest_hl* hl) { int chest_work(chest_hl* hl) {
int i;
chest_t *q = &hl->obj; chest_t *q = &hl->obj;
/*
if (hl->in_len == SF_SZ(q)) {
*hl->out_len = chest_LTEDL_run_sf(q, hl->input, hl->output, hl->ctrl_in.slot_id/2);
} else if (hl->in_len == SLOT_SZ(q)) {
*hl->out_len = chest_LTEDL_run_slot(q, hl->input, hl->output, hl->ctrl_in.slot_id);
}
*/
if (*hl->out_len < 0) { if (hl->init.cell_id != hl->ctrl_in.cell_id) {
return -1; if (chest_ref_LTEDL(q, hl->init.cell_id)) {
} else { fprintf(stderr, "Error initializing reference signal\n");
return 0; 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;
}
return 0;
} }
int chest_stop(chest_hl* hl) { int chest_stop(chest_hl* hl) {

@ -43,8 +43,10 @@ int ch_awgn_initialize(ch_awgn_hl* hl) {
int ch_awgn_work(ch_awgn_hl* hl) { int ch_awgn_work(ch_awgn_hl* hl) {
ch_awgn(hl->input,hl->output,hl->ctrl_in.variance,hl->in_len); ch_awgn(hl->input,hl->output,hl->ctrl_in.variance,hl->in_len);
if (hl->out_len) { hl->out_len = hl->in_len;
*hl->out_len = hl->in_len; return 0;
} }
int ch_awgn_stop(ch_awgn_hl* hl) {
return 0; return 0;
} }

@ -16,85 +16,14 @@
* along with OSLD-lib. If not, see <http://www.gnu.org/licenses/>. * along with OSLD-lib. If not, see <http://www.gnu.org/licenses/>.
*/ */
/**@TODO frontend to FEC library if installed
*/
#include <stdlib.h> #include <stdlib.h>
#include <stdio.h> #include <stdio.h>
#include <math.h> #include <math.h>
#include "fec/convcoder.h" #include "fec/convcoder.h"
#include "parity.h" #include "parity.h"
#include "viterbi37.h"
#define DEB 0
int decode37(void *o, float *symbols, char *data) {
viterbi_t *q = o;
int i;
int len = q->tail_biting ? q->framebits : (q->framebits + q->K - 1);
float amp = 0;
for (i=0;i<3*len;i++) {
if (fabsf(symbols[i] > amp)) {
amp = symbols[i];
}
}
/* Decode it and make sure we get the right answer */
/* Initialize Viterbi decoder */
init_viterbi37_port(q->ptr, q->tail_biting?-1:0);
/* Decode block */
update_viterbi37_blk_port(q->ptr, symbols,q->framebits + q->K - 1, amp, len);
/* Do Viterbi chainback */
chainback_viterbi37_port(q->ptr, data, q->framebits, 0);
return q->framebits;
}
void free37(void *o) {
viterbi_t *q = o;
delete_viterbi37_port(q->ptr);
}
int init37(viterbi_t *q, int poly[3], int framebits, bool tail_biting) {
q->K = 7;
q->R = 3;
q->framebits = framebits;
q->tail_biting = tail_biting;
q->decode = decode37;
q->free = free37;
if ((q->ptr = create_viterbi37_port(poly, framebits, tail_biting)) == NULL) {
fprintf(stderr, "create_viterbi37 failed\n");
return -1;
} else {
return 0;
}
}
int viterbi_init(viterbi_t *q, viterbi_type_t type, int poly[3], int framebits, bool tail_bitting) {
switch(type) {
case CONVCODER_37:
return init37(q, poly, framebits, tail_bitting);
default:
fprintf(stderr, "Decoder not implemented\n");
return -1;
}
}
void viterbi_free(viterbi_t *q) {
q->free(q);
}
/* symbols are real-valued */
int viterbi_decode(viterbi_t *q, float *symbols, char *data) {
return q->decode(q, symbols, data);
}
int conv_encode(convcoder_t *q, char *input, char *output) { int convcoder_encode(convcoder_t *q, char *input, char *output) {
unsigned int sr; unsigned int sr;
int i,j; int i,j;
int len = q->tail_biting ? q->framelength : (q->framelength + q->K - 1); int len = q->tail_biting ? q->framelength : (q->framelength + q->K - 1);
@ -102,24 +31,42 @@ int conv_encode(convcoder_t *q, char *input, char *output) {
if (q->tail_biting) { if (q->tail_biting) {
sr = 0; sr = 0;
for (i=q->framelength - q->K + 1; i<q->framelength; i++) { for (i=q->framelength - q->K + 1; i<q->framelength; i++) {
if (DEB) printf("%3d: sr=%3d, bit=%d\n",i,sr&7,input[i]);
sr = (sr << 1) | (input[i] & 1); sr = (sr << 1) | (input[i] & 1);
} }
} else { } else {
sr = 0; sr = 0;
} }
if (DEB) printf("state st=%d\n",sr&7);
for (i = 0; i < len; i++) { for (i = 0; i < len; i++) {
int bit = (i < q->framelength) ? (input[i] & 1) : 0; int bit = (i < q->framelength) ? (input[i] & 1) : 0;
sr = (sr << 1) | bit; sr = (sr << 1) | bit;
if (DEB) printf("%d, ",input[i]);
for (j=0;j<q->R;j++) { for (j=0;j<q->R;j++) {
output[q->R * i + j] = parity(sr & q->poly[j]); output[q->R * i + j] = parity(sr & q->poly[j]);
} }
} }
if (DEB) printf("\n");
if (DEB) printf("state fin=%u\n",sr&7);
return q->R*len; return q->R*len;
} }
int convcoder_initialize(convcoder_hl* h) {
return 0;
}
int convcoder_work(convcoder_hl* hl) {
hl->obj.K = hl->ctrl_in.constraint_length;
hl->obj.R = hl->ctrl_in.rate;
hl->obj.framelength = hl->in_len;
hl->obj.poly[0] = hl->ctrl_in.generator_0;
hl->obj.poly[1] = hl->ctrl_in.generator_1;
hl->obj.poly[2] = hl->ctrl_in.generator_2;
hl->obj.tail_biting = hl->ctrl_in.tail_bitting?true:false;
hl->out_len = convcoder_encode(&hl->obj, hl->input, hl->output);
return 0;
}
int convcoder_stop(convcoder_hl* h) {
return 0;
}

@ -0,0 +1,144 @@
/*
* Copyright (c) 2013, Ismael Gomez-Miguelez <gomezi@tcd.ie>.
* This file is part of OSLD-lib (http://https://github.com/ismagom/osld-lib)
*
* OSLD-lib is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* OSLD-lib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with OSLD-lib. If not, see <http://www.gnu.org/licenses/>.
*/
/**@TODO frontend to FEC library if installed
*/
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include "fec/viterbi.h"
#include "parity.h"
#include "viterbi37.h"
#define DEB 0
int decode37(void *o, float *symbols, char *data) {
viterbi_t *q = o;
int i;
int len = q->tail_biting ? q->framebits : (q->framebits + q->K - 1);
float amp = 0;
for (i=0;i<3*len;i++) {
if (fabsf(symbols[i] > amp)) {
amp = symbols[i];
}
}
/* Decode it and make sure we get the right answer */
/* Initialize Viterbi decoder */
init_viterbi37_port(q->ptr, q->tail_biting?-1:0);
/* Decode block */
update_viterbi37_blk_port(q->ptr, symbols,q->framebits + q->K - 1, amp, len);
/* Do Viterbi chainback */
chainback_viterbi37_port(q->ptr, data, q->framebits, 0);
return q->framebits;
}
void free37(void *o) {
viterbi_t *q = o;
delete_viterbi37_port(q->ptr);
}
int init37(viterbi_t *q, int poly[3], int framebits, bool tail_biting) {
q->K = 7;
q->R = 3;
q->framebits = framebits;
q->tail_biting = tail_biting;
q->decode = decode37;
q->free = free37;
if ((q->ptr = create_viterbi37_port(poly, framebits, tail_biting)) == NULL) {
fprintf(stderr, "create_viterbi37 failed\n");
return -1;
} else {
return 0;
}
}
int viterbi_init(viterbi_t *q, viterbi_type_t type, int poly[3], int framebits, bool tail_bitting) {
switch(type) {
case viterbi_37:
return init37(q, poly, framebits, tail_bitting);
default:
fprintf(stderr, "Decoder not implemented\n");
return -1;
}
}
void viterbi_free(viterbi_t *q) {
q->free(q);
}
/* symbols are real-valued */
int viterbi_decode(viterbi_t *q, float *symbols, char *data) {
return q->decode(q, symbols, data);
}
int viterbi_initialize(viterbi_hl* h) {
int poly[3];
viterbi_type_t type;
if (h->init.rate == 2) {
if (h->init.constraint_length == 7) {
type = viterbi_27;
} else if (h->init.constraint_length == 9) {
type = viterbi_29;
} else {
fprintf(stderr, "Unsupported decoder %d/%d\n", h->init.rate,
h->init.constraint_length);
return -1;
}
} else if (h->init.rate == 3) {
if (h->init.constraint_length == 7) {
type = viterbi_37;
} else if (h->init.constraint_length == 9) {
type = viterbi_39;
} else {
fprintf(stderr, "Unsupported decoder %d/%d\n", h->init.rate,
h->init.constraint_length);
return -1;
}
} else {
fprintf(stderr, "Unsupported decoder %d/%d\n", h->init.rate,
h->init.constraint_length);
return -1;
}
poly[0] = h->init.generator_0;
poly[1] = h->init.generator_1;
poly[2] = h->init.generator_2;
return viterbi_init(&h->obj, type, poly, h->init.frame_length,
h->init.tail_bitting?true:false);
}
int viterbi_work(viterbi_hl* hl) {
if (hl->in_len != hl->init.frame_length) {
fprintf(stderr, "Expected input length %d but got %d\n", hl->init.frame_length, hl->in_len);
return -1;
}
return viterbi_decode(&hl->obj, hl->input, hl->output);
}
int viterbi_stop(viterbi_hl* h) {
viterbi_free(&h->obj);
return 0;
}

@ -155,12 +155,10 @@ int binsource_work(binsource_hl* hl) {
} else { } else {
ret = binsource_generate(&hl->obj,hl->output,hl->ctrl_in.nbits); ret = binsource_generate(&hl->obj,hl->output,hl->ctrl_in.nbits);
} }
if (hl->out_len) { if (!ret) {
if (!ret) { hl->out_len = hl->ctrl_in.nbits;
*hl->out_len = hl->ctrl_in.nbits; } else {
} else { hl->out_len = 0;
*hl->out_len = 0;
}
} }
return ret; return ret;
} }

@ -92,8 +92,8 @@ int filesource_initialize(filesource_hl* h) {
} }
int filesource_work(filesource_hl* h) { int filesource_work(filesource_hl* h) {
*h->out_len = filesource_read(&h->obj, h->output, h->ctrl_in.nsamples); h->out_len = filesource_read(&h->obj, h->output, h->ctrl_in.nsamples);
if (*h->out_len < 0) { if (h->out_len < 0) {
return -1; return -1;
} }
return 0; return 0;

@ -65,11 +65,12 @@ int demod_hard_initialize(demod_hard_hl* hl) {
int demod_hard_work(demod_hard_hl* hl) { int demod_hard_work(demod_hard_hl* hl) {
int ret = demod_hard_demodulate(&hl->obj,hl->input,hl->output,hl->in_len); int ret = demod_hard_demodulate(&hl->obj,hl->input,hl->output,hl->in_len);
if (hl->out_len) { hl->out_len = ret;
*hl->out_len = ret;
}
return 0; return 0;
} }
int demod_hard_stop(demod_hard_hl* hl) {
return 0;
}

@ -72,9 +72,7 @@ int demod_soft_work(demod_soft_hl* hl) {
hl->obj.sigma = hl->ctrl_in.sigma; hl->obj.sigma = hl->ctrl_in.sigma;
hl->obj.alg_type = hl->ctrl_in.alg_type; hl->obj.alg_type = hl->ctrl_in.alg_type;
int ret = demod_soft_demodulate(&hl->obj,hl->input,hl->output,hl->in_len); int ret = demod_soft_demodulate(&hl->obj,hl->input,hl->output,hl->in_len);
if (hl->out_len) { hl->out_len = ret;
*hl->out_len = ret;
}
return 0; return 0;
} }

@ -49,9 +49,7 @@ int mod_initialize(mod_hl* hl) {
int mod_work(mod_hl* hl) { int mod_work(mod_hl* hl) {
int ret = mod_modulate(&hl->obj,hl->input,hl->output,hl->in_len); int ret = mod_modulate(&hl->obj,hl->input,hl->output,hl->in_len);
if (hl->out_len) { hl->out_len = ret;
*hl->out_len = ret;
}
return 0; return 0;
} }

@ -137,7 +137,7 @@ int pbch_init(pbch_t *q, int cell_id, lte_cp_t cp) {
} }
int poly[3] = {0x6D, 0x4F, 0x57}; int poly[3] = {0x6D, 0x4F, 0x57};
if (viterbi_init(&q->decoder, CONVCODER_37, poly, 40, true)) { if (viterbi_init(&q->decoder, viterbi_37, poly, 40, true)) {
goto clean; goto clean;
} }
int nof_symbols = (CP_ISNORM(q->cp)) ? PBCH_RE_CPNORM: PBCH_RE_CPEXT; int nof_symbols = (CP_ISNORM(q->cp)) ? PBCH_RE_CPNORM: PBCH_RE_CPEXT;
@ -275,7 +275,7 @@ int pbch_decode_frame(pbch_t *q, pbch_mib_t *mib, int src, int dst, int n, int n
} }
/* unrate matching */ /* unrate matching */
rm_conv_rx(q->temp, q->pbch_rm, 4*nof_bits, 120); rm_conv_rx(q->temp, q->pbch_rm, 4 * nof_bits, 120);
/* decode */ /* decode */
viterbi_decode(&q->decoder, q->pbch_rm, q->data); viterbi_decode(&q->decoder, q->pbch_rm, q->data);
@ -324,15 +324,13 @@ int pbch_decode(pbch_t *q, cf_t *slot1_symbols, cf_t **ce, int nof_ports,
/* Try decoding for 1 to nof_ports antennas */ /* Try decoding for 1 to nof_ports antennas */
for (nant=0;nant<nof_ports;nant++) { for (nant=0;nant<nof_ports;nant++) {
/* pre-decoder & matched filter */ /*@TODO: pre-decoder & matched filter */
int i; int i;
for (i=0;i<nof_symbols;i++) { for (i=0;i<nof_symbols;i++) {
q->pbch_symbols[i] /= ce[0][i]; q->pbch_symbols[i] /= ce[0][i];
} }
/* layer demapper */ /*@TODO: layer demapping */
//x = lte_pre_decoder_and_matched_filter(y_est, ce(1:n,:), "tx_diversity");
//d = lte_layer_demapper(x, 1, "tx_diversity");
/* demodulate symbols */ /* demodulate symbols */
demod_soft_sigma_set(&q->demod, ebno); demod_soft_sigma_set(&q->demod, ebno);

@ -102,10 +102,10 @@ int rm_conv_initialize(rm_conv_hl* h) {
int rm_conv_work(rm_conv_hl* hl) { int rm_conv_work(rm_conv_hl* hl) {
if (hl->init.direction) { if (hl->init.direction) {
//rm_conv_tx(hl->input, hl->output, hl->in_len, hl->ctrl_in.S); //rm_conv_tx(hl->input, hl->output, hl->in_len, hl->ctrl_in.S);
*(hl->out_len) = hl->ctrl_in.S; hl->out_len = hl->ctrl_in.S;
} else { } else {
rm_conv_rx(hl->input, hl->output, hl->in_len, hl->ctrl_in.E); rm_conv_rx(hl->input, hl->output, hl->in_len, hl->ctrl_in.E);
*(hl->out_len) = hl->ctrl_in.E; hl->out_len = hl->ctrl_in.E;
} }
return 0; return 0;
} }

@ -41,15 +41,14 @@ void interp_linear_offset(cf_t *input, cf_t *output, int M, int len, int off_st,
mag = mag0 + j*(mag1-mag0)/M; mag = mag0 + j*(mag1-mag0)/M;
arg = arg0 + j*(arg1-arg0)/M; arg = arg0 + j*(arg1-arg0)/M;
output[i*M+j+off_st] = mag * cexpf(I * arg); output[i*M+j+off_st] = mag * cexpf(I * arg);
// DEBUG("output[%d] = input[%d]+%d*(input[%d]-input[%d])/%d = %.3f+%.3f = %.3f delta=%.3f\n",
// i*M+j, i, j, i+1, i, M, cabsf(input[i]), cabsf(j*(input[i+1] - input[i])/M),
// cabsf(output[i*M+j]));
} }
} }
for (j=0;j<off_end;j++) { if (len > 1) {
mag = mag1 + j*(mag1-mag0)/M; for (j=0;j<off_end;j++) {
arg = arg1 + j*(arg1-arg0)/M; mag = mag1 + j*(mag1-mag0)/M;
output[i*M+j+off_st] = mag * cexpf(I * arg); arg = arg1 + j*(arg1-arg0)/M;
output[i*M+j+off_st] = mag * cexpf(I * arg);
}
} }
} }

@ -100,7 +100,7 @@ int scrambling_work(scrambling_hl* hl) {
memcpy(hl->output, hl->input, sizeof(float) * hl->in_len); memcpy(hl->output, hl->input, sizeof(float) * hl->in_len);
scrambling_float(seq, hl->output); scrambling_float(seq, hl->output);
} }
*(hl->out_len) = hl->in_len; hl->out_len = hl->in_len;
return 0; return 0;
} }

@ -24,8 +24,8 @@
cf_t corr_sz(cf_t *z, cf_t *s) { cf_t corr_sz(cf_t *z, cf_t *s) {
cf_t sum; cf_t sum;
cf_t zsprod[32]; cf_t zsprod[32];
vec_dot_prod(z, s, zsprod, N_SSS - 1); vec_dot_prod_ccc(z, s, zsprod, N_SSS - 1);
sum = sum_c(zsprod, N_SSS - 1); sum = vec_acc_cc(zsprod, N_SSS - 1);
return sum; return sum;
} }
@ -66,24 +66,30 @@ void sss_synch_m0m1(sss_synch_t *q, cf_t *input, int *m0, float *m0_value,
y[1][i] = input_fft[SSS_POS_SYMBOL + 2 * i + 1]; y[1][i] = input_fft[SSS_POS_SYMBOL + 2 * i + 1];
} }
vec_dot_prod(y[0], q->fc_tables.c[0], z, N_SSS); vec_dot_prod_ccc(y[0], q->fc_tables.c[0], z, N_SSS);
memcpy(zdelay, &z[1], (N_SSS - 1) * sizeof(cf_t)); memcpy(zdelay, &z[1], (N_SSS - 1) * sizeof(cf_t));
vec_conj(z, zconj, N_SSS - 1); vec_conj_cc(z, zconj, N_SSS - 1);
vec_dot_prod(zdelay, zconj, zprod, N_SSS - 1); vec_dot_prod_ccc(zdelay, zconj, zprod, N_SSS - 1);
corr_all_zs(zprod, q->fc_tables.s, tmp); corr_all_zs(zprod, q->fc_tables.s, tmp);
vec_abs(tmp, tmp_real, N_SSS); vec_abs_cf(tmp, tmp_real, N_SSS);
vec_max(tmp_real, m0_value, m0, N_SSS); *m0 = vec_max_fi(tmp_real, N_SSS);
if (m0_value) {
*m0_value = tmp_real[*m0];
}
vec_dot_prod(y[1], q->fc_tables.c[1], tmp, N_SSS); vec_dot_prod_ccc(y[1], q->fc_tables.c[1], tmp, N_SSS);
vec_dot_prod(tmp, q->fc_tables.z1[*m0], z, N_SSS); vec_dot_prod_ccc(tmp, q->fc_tables.z1[*m0], z, N_SSS);
memcpy(zdelay, &z[1], (N_SSS - 1) * sizeof(cf_t)); memcpy(zdelay, &z[1], (N_SSS - 1) * sizeof(cf_t));
vec_conj(z, zconj, N_SSS - 1); vec_conj_cc(z, zconj, N_SSS - 1);
vec_dot_prod(zdelay, zconj, zprod, N_SSS - 1); vec_dot_prod_ccc(zdelay, zconj, zprod, N_SSS - 1);
corr_all_zs(zprod, q->fc_tables.s, tmp); corr_all_zs(zprod, q->fc_tables.s, tmp);
vec_abs(tmp, tmp_real, N_SSS); vec_abs_cf(tmp, tmp_real, N_SSS);
vec_max(tmp_real, m1_value, m1, N_SSS); *m1 = vec_max_fi(tmp_real, N_SSS);
if (m1_value) {
*m1_value = tmp_real[*m1];
}
} }

@ -174,10 +174,10 @@ int pss_synch_set_N_id_2(pss_synch_t *q, int N_id_2) {
dft_run_c2c(&plan, pss_signal_pad, q->pss_signal_freq); dft_run_c2c(&plan, pss_signal_pad, q->pss_signal_freq);
vec_mult_c_r(q->pss_signal_freq, pss_signal_pad, vec_sc_prod_cfc(q->pss_signal_freq, (float) 1 / (PSS_LEN_FREQ - 1),
(float) 1 / (PSS_LEN_FREQ - 1), PSS_LEN_FREQ); pss_signal_pad, PSS_LEN_FREQ);
vec_conj(pss_signal_pad, q->pss_signal_freq, PSS_LEN_FREQ); vec_conj_cc(pss_signal_pad, q->pss_signal_freq, PSS_LEN_FREQ);
q->N_id_2 = N_id_2; q->N_id_2 = N_id_2;
@ -206,13 +206,16 @@ int pss_synch_find_pss(pss_synch_t *q, cf_t *input, float *corr_peak_value, floa
conv_output_len = conv_cc(input, q->pss_signal_freq, q->conv_output, q->frame_size, PSS_LEN_FREQ); conv_output_len = conv_cc(input, q->pss_signal_freq, q->conv_output, q->frame_size, PSS_LEN_FREQ);
#endif #endif
vec_abs(q->conv_output, q->conv_abs, conv_output_len); vec_abs_cf(q->conv_output, q->conv_abs, conv_output_len);
vec_max(q->conv_abs, corr_peak_value, &corr_peak_pos, conv_output_len); corr_peak_pos = vec_max_fi(q->conv_abs, conv_output_len);
if (corr_peak_value) {
*corr_peak_value = q->conv_abs[corr_peak_pos];
}
if (corr_mean_value) { if (corr_mean_value) {
*corr_mean_value = sum_r(q->conv_abs, conv_output_len) / conv_output_len; *corr_mean_value = vec_acc_ff(q->conv_abs, conv_output_len) / conv_output_len;
} }
return corr_peak_pos; return (int) corr_peak_pos;
} }
/* Returns the CFO estimation given a PSS received sequence /* Returns the CFO estimation given a PSS received sequence
@ -224,10 +227,10 @@ float pss_synch_cfo_compute(pss_synch_t* q, cf_t *pss_recv) {
cf_t y0, y1, yr; cf_t y0, y1, yr;
cf_t y[PSS_LEN_FREQ-1]; cf_t y[PSS_LEN_FREQ-1];
vec_dot_prod_u(q->pss_signal_freq, pss_recv, y, PSS_LEN_FREQ - 1); vec_dot_prod_ccc_unalign(q->pss_signal_freq, pss_recv, y, PSS_LEN_FREQ - 1);
y0 = sum_c(y, (PSS_LEN_FREQ - 1)/2); y0 = vec_acc_cc(y, (PSS_LEN_FREQ - 1)/2);
y1 = sum_c(&y[(PSS_LEN_FREQ - 1)/2], (PSS_LEN_FREQ - 1)/2); y1 = vec_acc_cc(&y[(PSS_LEN_FREQ - 1)/2], (PSS_LEN_FREQ - 1)/2);
yr = conjf(y0) * y1; yr = conjf(y0) * y1;
return atan2f(__imag__ yr, __real__ yr) / M_PI; return atan2f(__imag__ yr, __real__ yr) / M_PI;
@ -380,10 +383,7 @@ int pss_synch_work(pss_synch_hl* hl) {
pss_synch_set_threshold(&hl->obj, hl->ctrl_in.correlation_threshold); pss_synch_set_threshold(&hl->obj, hl->ctrl_in.correlation_threshold);
} }
*hl->out_len = pss_synch_frame(&hl->obj, hl->input, hl->output, hl->in_len); hl->out_len = pss_synch_frame(&hl->obj, hl->input, hl->output, hl->in_len);
if (*hl->out_len < 0) {
return -1;
}
return 0; return 0;
} }

@ -66,7 +66,7 @@ int conv_fft_cc_run(conv_fft_cc_t *state, _Complex float *input, _Complex float
dft_run_c2c(&state->input_plan, input, state->input_fft); dft_run_c2c(&state->input_plan, input, state->input_fft);
dft_run_c2c(&state->filter_plan, filter, state->filter_fft); dft_run_c2c(&state->filter_plan, filter, state->filter_fft);
vec_dot_prod(state->input_fft,state->filter_fft,state->output_fft,state->output_len); vec_dot_prod_ccc(state->input_fft,state->filter_fft,state->output_fft,state->output_len);
dft_run_c2c(&state->output_plan, state->output_fft, output); dft_run_c2c(&state->output_plan, state->output_fft, output);

@ -27,23 +27,23 @@
#include "volk/volk.h" #include "volk/volk.h"
#endif #endif
int sum_i(int *x, int len) { int vec_acc_ii(int *x, int len) {
int i; int i;
int y=0; int z=0;
for (i=0;i<len;i++) { for (i=0;i<len;i++) {
y+=x[i]; z+=x[i];
} }
return y; return z;
} }
float sum_r(float *x, int len) { float vec_acc_ff(float *x, int len) {
#ifndef HAVE_VOLK #ifndef HAVE_VOLK
int i; int i;
float y=0; float z=0;
for (i=0;i<len;i++) { for (i=0;i<len;i++) {
y+=x[i]; z+=x[i];
} }
return y; return z;
#else #else
float result; float result;
volk_32f_accumulator_s32f_a(&result,x,(unsigned int) len); volk_32f_accumulator_s32f_a(&result,x,(unsigned int) len);
@ -51,51 +51,56 @@ float sum_r(float *x, int len) {
#endif #endif
} }
_Complex float sum_c(_Complex float *x, int len) { cf_t vec_acc_cc(cf_t *x, int len) {
int i; int i;
_Complex float y=0; cf_t z=0;
for (i=0;i<len;i++) { for (i=0;i<len;i++) {
y+=x[i]; z+=x[i];
} }
return y; return z;
} }
void vec_sum_c(_Complex float *z, _Complex float *x, _Complex float *y, int len) { void vec_sum_ccc(cf_t *z, cf_t *x, cf_t *y, int len) {
int i; int i;
for (i=0;i<len;i++) { for (i=0;i<len;i++) {
z[i] = x[i]+y[i]; z[i] = x[i]+y[i];
} }
} }
void vec_sum_char(char *z, char *x, char *y, int len) { void vec_sum_bbb(char *z, char *x, char *y, int len) {
int i; int i;
for (i=0;i<len;i++) { for (i=0;i<len;i++) {
z[i] = x[i]+y[i]; z[i] = x[i]+y[i];
} }
} }
void vec_mult_c_r(_Complex float *x,_Complex float *y, float h, int len) { void vec_sc_prod_cfc(cf_t *x, float h, cf_t *z, int len) {
#ifndef HAVE_VOLK #ifndef HAVE_VOLK
int i; int i;
for (i=0;i<len;i++) { for (i=0;i<len;i++) {
y[i] = x[i]*h; z[i] = x[i]*h;
} }
#else #else
_Complex float hh; cf_t hh;
__real__ hh = h; __real__ hh = h;
__imag__ hh = 0; __imag__ hh = 0;
volk_32fc_s32fc_multiply_32fc_a(y,x,hh,(unsigned int) len); volk_32fc_s32fc_multiply_32fc_a(z,x,hh,(unsigned int) len);
#endif #endif
} }
void vec_sc_prod_ccc(cf_t *x, cf_t h, cf_t *z, int len) {
void vec_mult_c(_Complex float *x,_Complex float *y, _Complex float h, int len) { #ifndef HAVE_VOLK
int i; int i;
for (i=0;i<len;i++) { for (i=0;i<len;i++) {
y[i] = x[i]*h; z[i] = x[i]*h;
} }
#else
volk_32fc_s32fc_multiply_32fc_a(z,x,h,(unsigned int) len);
#endif
} }
void *vec_malloc(int size) { void *vec_malloc(int size) {
#ifndef HAVE_VOLK #ifndef HAVE_VOLK
return malloc(size); return malloc(size);
@ -109,7 +114,7 @@ void *vec_malloc(int size) {
#endif #endif
} }
void vec_fprint_c(FILE *stream, _Complex float *x, int len) { void vec_fprint_c(FILE *stream, cf_t *x, int len) {
int i; int i;
fprintf(stream, "["); fprintf(stream, "[");
for (i=0;i<len;i++) { for (i=0;i<len;i++) {
@ -141,7 +146,7 @@ void vec_fprint_i(FILE *stream, int *x, int len) {
fprintf(stream, "];\n"); fprintf(stream, "];\n");
} }
void vec_conj(_Complex float *x, _Complex float *y, int len) { void vec_conj_cc(cf_t *x, cf_t *y, int len) {
#ifndef HAVE_VOLK #ifndef HAVE_VOLK
int i; int i;
for (i=0;i<len;i++) { for (i=0;i<len;i++) {
@ -152,7 +157,7 @@ void vec_conj(_Complex float *x, _Complex float *y, int len) {
#endif #endif
} }
void vec_dot_prod(_Complex float *x,_Complex float *y, _Complex float *z, int len) { void vec_dot_prod_ccc(cf_t *x,cf_t *y, cf_t *z, int len) {
#ifndef HAVE_VOLK #ifndef HAVE_VOLK
int i; int i;
for (i=0;i<len;i++) { for (i=0;i<len;i++) {
@ -164,7 +169,7 @@ void vec_dot_prod(_Complex float *x,_Complex float *y, _Complex float *z, int le
} }
float vec_power(_Complex float *x, int len) { float vec_avg_power_cf(cf_t *x, int len) {
int j; int j;
float power = 0; float power = 0;
for (j=0;j<len;j++) { for (j=0;j<len;j++) {
@ -174,7 +179,7 @@ float vec_power(_Complex float *x, int len) {
return power / len; return power / len;
} }
void vec_dot_prod_u(_Complex float *x,_Complex float *y, _Complex float *z, int len) { void vec_dot_prod_ccc_unalign(cf_t *x,cf_t *y, cf_t *z, int len) {
#ifndef HAVE_VOLK #ifndef HAVE_VOLK
int i; int i;
for (i=0;i<len;i++) { for (i=0;i<len;i++) {
@ -185,7 +190,7 @@ void vec_dot_prod_u(_Complex float *x,_Complex float *y, _Complex float *z, int
#endif #endif
} }
void vec_abs(_Complex float *x, float *abs, int len) { void vec_abs_cf(cf_t *x, float *abs, int len) {
#ifndef HAVE_VOLK #ifndef HAVE_VOLK
int i; int i;
for (i=0;i<len;i++) { for (i=0;i<len;i++) {
@ -198,24 +203,22 @@ void vec_abs(_Complex float *x, float *abs, int len) {
} }
void vec_max(float *x, float *max, int *pos, int len) { int vec_max_fi(float *x, int len) {
#ifndef HAVE_VOLK #ifndef HAVE_VOLK
int i; int i;
float m=-FLT_MAX; float m=-FLT_MAX;
int p=-1; int p=0;
for (i=0;i<len;i++) { for (i=0;i<len;i++) {
if (x[i]>m) { if (x[i]>m) {
m=x[i]; m=x[i];
p=i; p=i;
} }
} }
if (pos) *pos=p; return p;
if (max) *max=m;
#else #else
unsigned int target=0; unsigned int target=0;
volk_32f_index_max_16u_a(&target,x,(unsigned int) len); volk_32f_index_max_16u_a(&target,x,(unsigned int) len);
if (pos) *pos=(int) target; return (int) target;
if (max) *max=x[target];
#endif #endif
} }

@ -0,0 +1,18 @@
function [ out ] = read_real( filename, count )
%READ_COMPLEX Summary of this function goes here
% Detailed explanation goes here
[tidin msg]=fopen(filename,'r');
if (tidin==-1)
fprintf('error opening %s: %s\n',filename, msg);
out=[];
return
end
if (nargin==1)
count=inf;
end
out=fread(tidin,count,'single');
end

@ -28,7 +28,7 @@ function [ fs eps p_m w2] = find_pss( x, N_id_2, doplot, threshold)
end end
% Estimate PSS-aided CFO % Estimate PSS-aided CFO
if (i > 200 && i<length(x)&& p_m > threshold) if (i > 128 && i<length(x)&& p_m > threshold)
y=ccf.*x(i-128:i-1); y=ccf.*x(i-128:i-1);
y0=y(1:64); y0=y(1:64);

@ -15,8 +15,6 @@ typedef _Complex float complex_t;
#define SAMPLE_SZ sizeof(complex_t) #define SAMPLE_SZ sizeof(complex_t)
void uhd_rx_stream(void *h);
bool isLocked(void *h) bool isLocked(void *h)
{ {
uhd_handler* handler = static_cast<uhd_handler*>(h); uhd_handler* handler = static_cast<uhd_handler*>(h);

@ -36,7 +36,7 @@ int uhd_rssi_scan(void *uhd, float *freqs, float *rssi, int nof_bands, double fs
goto free_and_exit; goto free_and_exit;
} }
} }
rssi[i] = vec_power(buffer, nsamp); rssi[i] = vec_avg_power_cf(buffer, nsamp);
printf("[%3d]: Freq %4.1f Mhz - RSSI: %3.2f dBm\r", i, f/1000000, 10*log10f(rssi[i]) + 30); fflush(stdout); printf("[%3d]: Freq %4.1f Mhz - RSSI: %3.2f dBm\r", i, f/1000000, 10*log10f(rssi[i]) + 30); fflush(stdout);
if (VERBOSE_ISINFO()) { if (VERBOSE_ISINFO()) {
printf("\n"); printf("\n");

Loading…
Cancel
Save