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Added nof_frames to pbch_file_test

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master
ismagom 10 years ago
parent 37e386d6d5
commit 40c7db7009
3 changed files with 67 additions and 71 deletions
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121
lte/phy/lib/phch/test/pbch_file_test.c
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@ -34,9 +34,6 @@
#include "liblte/phy/phy.h"
char *input_file_name = NULL;
char *matlab_file_name = NULL;
FILE *fmatlab = NULL;
lte_cell_t cell = {
6, // nof_prb
@ -47,9 +44,11 @@ lte_cell_t cell = {
PHICH_NORM // PHICH length
};
int nof_frames = 1;
uint8_t bch_payload_file[BCH_PAYLOAD_LEN] = {0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
#define FLEN 9600
#define FLEN (10*SF_LEN(lte_symbol_sz(cell.nof_prb)))
filesource_t fsrc;
cf_t *input_buffer, *fft_buffer, *ce[MAX_PORTS];
@ -59,17 +58,17 @@ chest_dl_t chest;
void usage(char *prog) {
printf("Usage: %s [vcoe] -i input_file\n", prog);
printf("\t-o output matlab file name [Default Disabled]\n");
printf("\t-c cell_id [Default %d]\n", cell.id);
printf("\t-n nof_prb [Default %d]\n", cell.nof_prb);
printf("\t-p nof_prb [Default %d]\n", cell.nof_prb);
printf("\t-e Set extended prefix [Default Normal]\n");
printf("\t-n nof_frames [Default %d]\n", nof_frames);
printf("\t-v [set verbose to debug, default none]\n");
}
void parse_args(int argc, char **argv) {
int opt;
while ((opt = getopt(argc, argv, "iovce")) != -1) {
while ((opt = getopt(argc, argv, "ivcpne")) != -1) {
switch(opt) {
case 'i':
input_file_name = argv[optind];
@ -77,8 +76,11 @@ void parse_args(int argc, char **argv) {
case 'c':
cell.id = atoi(argv[optind]);
break;
case 'o':
matlab_file_name = argv[optind];
case 'p':
cell.nof_prb = atoi(argv[optind]);
break;
case 'n':
nof_frames = atoi(argv[optind]);
break;
case 'v':
verbose++;
@ -105,16 +107,6 @@ int base_init() {
exit(-1);
}
if (matlab_file_name) {
fmatlab = fopen(matlab_file_name, "w");
if (!fmatlab) {
perror("fopen");
return -1;
}
} else {
fmatlab = NULL;
}
input_buffer = malloc(FLEN * sizeof(cf_t));
if (!input_buffer) {
perror("malloc");
@ -163,9 +155,6 @@ void base_free() {
int i;
filesource_free(&fsrc);
if (fmatlab) {
fclose(fmatlab);
}
free(input_buffer);
free(fft_buffer);
@ -198,47 +187,59 @@ int main(int argc, char **argv) {
exit(-1);
}
n = filesource_read(&fsrc, input_buffer, FLEN);
lte_fft_run_sf(&fft, input_buffer, fft_buffer);
if (fmatlab) {
fprintf(fmatlab, "outfft=");
vec_sc_prod_cfc(fft_buffer, 1000.0, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
vec_fprint_c(fmatlab, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
fprintf(fmatlab, ";\n");
vec_sc_prod_cfc(fft_buffer, 0.001, fft_buffer, CP_NSYMB(cell.cp) * cell.nof_prb * RE_X_RB);
}
/* Get channel estimates for each port */
chest_dl_estimate(&chest, fft_buffer, ce, 0);
INFO("Decoding PBCH\n", 0);
for (int i=0;i<MAX_PORTS;i++) {
ce_slot1[i] = &ce[i][SLOT_LEN_RE(cell.nof_prb, cell.cp)];
}
n = pbch_decode(&pbch, &fft_buffer[SLOT_LEN_RE(cell.nof_prb, cell.cp)],
ce_slot1, chest_dl_get_noise_estimate(&chest),
bch_payload, &nof_tx_ports, &sfn_offset);
int frame_cnt = 0;
int nof_decoded_mibs = 0;
int nread = 0;
do {
nread = filesource_read(&fsrc, input_buffer, FLEN);
if (nread > 0) {
// process 1st subframe only
lte_fft_run_sf(&fft, input_buffer, fft_buffer);
/* Get channel estimates for each port */
chest_dl_estimate(&chest, fft_buffer, ce, 0);
INFO("Decoding PBCH\n", 0);
for (int i=0;i<MAX_PORTS;i++) {
ce_slot1[i] = &ce[i][SLOT_LEN_RE(cell.nof_prb, cell.cp)];
}
pbch_decode_reset(&pbch);
n = pbch_decode(&pbch, &fft_buffer[SLOT_LEN_RE(cell.nof_prb, cell.cp)],
ce_slot1, chest_dl_get_noise_estimate(&chest),
bch_payload, &nof_tx_ports, &sfn_offset);
if (n == 1) {
nof_decoded_mibs++;
} else if (n < 0) {
fprintf(stderr, "Error decoding PBCH\n");
exit(-1);
}
frame_cnt++;
} else if (nread < 0) {
fprintf(stderr, "Error reading from file\n");
exit(-1);
}
} while(nread > 0 && frame_cnt < nof_frames);
base_free();
if (n < 0) {
fprintf(stderr, "Error decoding PBCH\n");
exit(-1);
} else if (n == 0) {
printf("Could not decode PBCH\n");
exit(-1);
} else {
printf("MIB decoded OK. Nof ports: %d. SFN offset: %d Payload: ", nof_tx_ports, sfn_offset);
vec_fprint_hex(stdout, bch_payload, BCH_PAYLOAD_LEN);
if (nof_tx_ports == 2 && sfn_offset == 0 && !memcmp(bch_payload, bch_payload_file, BCH_PAYLOAD_LEN)) {
printf("This is the signal.1.92M.dat file\n");
exit(0);
} else {
printf("This is an unknown file\n");
if (frame_cnt == 1) {
if (n == 0) {
printf("Could not decode PBCH\n");
exit(-1);
} else {
printf("MIB decoded OK. Nof ports: %d. SFN offset: %d Payload: ", nof_tx_ports, sfn_offset);
vec_fprint_hex(stdout, bch_payload, BCH_PAYLOAD_LEN);
if (nof_tx_ports == 2 && sfn_offset == 0 && !memcmp(bch_payload, bch_payload_file, BCH_PAYLOAD_LEN)) {
printf("This is the signal.1.92M.dat file\n");
exit(0);
} else {
printf("This is an unknown file\n");
exit(-1);
}
}
} else {
printf("Decoded %d/%d MIBs\n", nof_decoded_mibs, frame_cnt);
}
}

5
lte/phy/lib/phch/test/pbch_test_mex.c
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@ -36,8 +36,6 @@
#define INPUT prhs[1]
#define NOF_INPUTS 2
extern int indices[2048];
void help()
{
mexErrMsgTxt
@ -148,9 +146,6 @@ void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
if (nlhs >= 7) {
mexutils_write_cf(pbch.ce[0], &plhs[6], pbch.nof_symbols, 1);
}
if (nlhs >= 7) {
mexutils_write_int(indices, &plhs[7], 2048, 1);
}
chest_dl_free(&chest);
lte_fft_free(&fft);

12
matlab/tests/pbch_bler.m
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@ -5,11 +5,11 @@
% R.11-2 5 MHz 2 ports
rmc = lteRMCDL('R.10');
NofPortsTx=2;
NofPortsTx=1;
SNR_values_db=linspace(-8,-2,4);
Nrealizations=200;
enb = struct('NCellID',0,'NDLRB',50,'CellRefP',NofPortsTx,'CyclicPrefix','Normal','DuplexMode','FDD','NSubframe',0);
SNR_values_db=1;%linspace(-8,-2,4);
Nrealizations=5;
enb = struct('NCellID',1,'NDLRB',25,'CellRefP',NofPortsTx,'CyclicPrefix','Normal','DuplexMode','FDD','NSubframe',0);
griddims = lteResourceGridSize(enb); % Resource grid dimensions
L = griddims(2);
@ -59,7 +59,7 @@ for snr_idx=1:length(SNR_values_db)
rxWaveform = noise + rxWaveform;
% rxWaveform = downsampled;
rxWaveform = x((i-1)*76800+1:i*76800);
% Number of OFDM symbols in a subframe
% OFDM demodulate signal
@ -79,7 +79,7 @@ for snr_idx=1:length(SNR_values_db)
errorReal(i,1)=1;
end
[nof_ports2, pbchSymbols2, pbchBits, ce, ce2, pbchRx2, pbchHest2,indices]= liblte_pbch(enb, rxWaveform, hest, nest);
[nof_ports2, pbchSymbols2, pbchBits, ce, ce2, pbchRx2, pbchHest2]= liblte_pbch(enb, rxWaveform, hest, nest);
if (nof_ports2 ~= NofPortsTx)
errorReal(i,2)=1;
end

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