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srsLTE
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Added SNR to phy_dl_test

This commit is contained in:
Xavier Arteaga 2021-05-03 15:21:53 +02:00 committed by Xavier Arteaga
parent f80c591127
commit 10a268fdba
1 changed files with 36 additions and 3 deletions
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39
lib/test/phy/phy_dl_test.c
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@ -35,6 +35,7 @@ static bool print_dci_table;
static uint32_t mcs = 20;
static int cross_carrier_indicator = -1;
static bool enable_256qam = false;
static float snr_db = NAN; // SNR in dB
void usage(char* prog)
{
@ -47,6 +48,7 @@ void usage(char* prog)
printf("\t-d Print DCI table [Default %s]\n", print_dci_table ? "yes" : "no");
printf("\t-t Transmission mode: 1,2,3,4 [Default %d]\n", transmission_mode + 1);
printf("\t-m mcs [Default %d]\n", mcs);
printf("\t-S SNR in dB [Default %+.2f]\n", snr_db);
printf("\tAdvanced parameters:\n");
if (cross_carrier_indicator >= 0) {
printf("\t\t-a carrier-indicator [Default %d]\n", cross_carrier_indicator);
@ -85,7 +87,7 @@ void parse_args(int argc, char** argv)
nof_rx_ant = 2;
}
while ((opt = getopt(argc, argv, "cfapndvqstmE")) != -1) {
while ((opt = getopt(argc, argv, "cfapndvqstmES")) != -1) {
switch (opt) {
case 't':
transmission_mode = (uint32_t)strtol(argv[optind], NULL, 10) - 1;
@ -112,6 +114,9 @@ void parse_args(int argc, char** argv)
case 's':
nof_subframes = (uint32_t)strtol(argv[optind], NULL, 10);
break;
case 'S':
snr_db = strtof(argv[optind], NULL);
break;
case 'E':
cell.cp = ((uint32_t)strtol(argv[optind], NULL, 10)) ? SRSRAN_CP_EXT : SRSRAN_CP_NORM;
break;
@ -316,6 +321,8 @@ int main(int argc, char** argv)
uint32_t count_failures = 0, count_tbs = 0;
size_t pdsch_decode_us = 0;
size_t pdsch_encode_us = 0;
srsran_channel_awgn_t awgn = {};
float snr_db_avg = 0.0;
int ret = -1;
@ -334,6 +341,11 @@ int main(int argc, char** argv)
}
}
if (srsran_channel_awgn_init(&awgn, 0x1234) < SRSRAN_SUCCESS) {
ERROR("Error AWGN init");
goto quit;
}
for (int i = 0; i < SRSRAN_MAX_TB; i++) {
softbuffer_tx[i] = (srsran_softbuffer_tx_t*)calloc(sizeof(srsran_softbuffer_tx_t), 1);
if (!softbuffer_tx[i]) {
@ -383,6 +395,17 @@ int main(int argc, char** argv)
goto quit;
}
/*
* Set AWGN N0
*/
if (isnormal(snr_db)) {
if (srsran_channel_awgn_set_n0(&awgn, srsran_enb_dl_get_maximum_signal_power_dBfs(cell.nof_prb) - snr_db) <
SRSRAN_SUCCESS) {
ERROR("Error setting N0");
goto quit;
}
}
/*
* Initialise UE
*/
@ -547,7 +570,10 @@ int main(int argc, char** argv)
signal_buffer[0][i] = y0;
signal_buffer[1][i] = y1;
}
srsran_channel_awgn_run_c(&awgn, signal_buffer[1], signal_buffer[1], SRSRAN_SF_LEN_PRB(cell.nof_prb));
}
srsran_channel_awgn_run_c(&awgn, signal_buffer[0], signal_buffer[0], SRSRAN_SF_LEN_PRB(cell.nof_prb));
/*
* Run UE
@ -592,11 +618,13 @@ int main(int argc, char** argv)
get_time_interval(t);
pdsch_decode_us += (size_t)(t[0].tv_sec * 1e6 + t[0].tv_usec);
snr_db_avg += ue_dl->chest_res.snr_db;
for (int i = 0; i < SRSRAN_MAX_TB; i++) {
if (ue_dl_cfg.cfg.pdsch.grant.tb[i].enabled) {
if (check_evm(enb_dl, ue_dl, &ue_dl_cfg, i)) {
if (!isnormal(snr_db) && check_evm(enb_dl, ue_dl, &ue_dl_cfg, i)) {
count_failures++;
} else if (check_softbits(enb_dl, ue_dl, &ue_dl_cfg, sf_idx, i) != SRSRAN_SUCCESS) {
} else if (!isnormal(snr_db) && check_softbits(enb_dl, ue_dl, &ue_dl_cfg, sf_idx, i) != SRSRAN_SUCCESS) {
printf("TB%d: The received softbits in subframe %d DO NOT match the encoded bits (crc=%d)\n",
i,
sf_idx,
@ -636,6 +664,10 @@ int main(int argc, char** argv)
printf("BLER: %5.1f%%\n", (float)count_failures / (float)count_tbs * 100.0f);
if (isnormal(snr_db)) {
printf("SNR Real: %+.2f; estimated: %+.2f\n", snr_db, snr_db_avg / nof_subframes);
}
quit:
srsran_enb_dl_free(enb_dl);
srsran_ue_dl_free(ue_dl);
@ -672,6 +704,7 @@ quit:
if (ue_dl) {
free(ue_dl);
}
srsran_channel_awgn_free(&awgn);
if (ret) {
printf("Error\n");