maki/openairinterface5g
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
a752f43ad60371b0d27dfa52fe5db39813ef7ea3
openairinterface5g/openair1/SIMULATION/NR_PHY/srssim.c
T

691 lines
26 KiB
C
Raw Blame History

/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
#include <stdio.h>
#include <stdlib.h>
#include "common/utils/nr/nr_common.h"
#include "common/utils/var_array.h"
#define inMicroS(a) (((double)(a)) / (get_cpu_freq_GHz() * 1000.0))
#include "SIMULATION/LTE_PHY/common_sim.h"
#include "common/utils/assertions.h"
#include "PHY/INIT/nr_phy_init.h"
#include "PHY/MODULATION/nr_modulation.h"
#include "PHY/MODULATION/modulation_common.h"
#include "PHY/NR_REFSIG/ul_ref_seq_nr.h"
#include "PHY/NR_TRANSPORT/nr_transport_common_proto.h"
#include "PHY/NR_TRANSPORT/nr_transport_proto.h"
#include "PHY/NR_UE_TRANSPORT/nr_transport_ue.h"
#include "PHY/NR_UE_TRANSPORT/nr_transport_proto_ue.h"
#include "PHY/NR_ESTIMATION/nr_ul_estimation.h"
#include "PHY/phy_vars_nr_ue.h"
#include "e1ap_messages_types.h"
#include "executables/nr-uesoftmodem.h"
#include "SIMULATION/NR_PHY/nr_unitary_defs.h"
#include "SIMULATION/TOOLS/sim.h"
#include "common/ran_context.h"
#include "time_meas.h"
#include "SCHED_NR/phy_frame_config_nr.h"
PHY_VARS_gNB *gNB;
PHY_VARS_NR_UE *UE;
RAN_CONTEXT_t RC;
char *uecap_file = NULL;
int32_t uplink_frequency_offset[MAX_NUM_CCs][4];
double cpuf;
uint64_t downlink_frequency[MAX_NUM_CCs][4];
uint64_t uplink_frequency[MAX_NUM_CCs][4];
THREAD_STRUCT thread_struct;
// needed for some functions
uint16_t n_rnti = 0x1234;
openair0_config_t openair0_cfg[MAX_CARDS];
nrUE_params_t nrUE_params;
nrUE_params_t *get_nrUE_params(void)
{
return &nrUE_params;
}
channel_desc_t *UE2gNB[MAX_MOBILES_PER_GNB][NUMBER_OF_gNB_MAX];
configmodule_interface_t *uniqCfg = NULL;
void e1_bearer_context_setup(const e1ap_bearer_setup_req_t *req)
{
abort();
}
void e1_bearer_context_modif(const e1ap_bearer_mod_req_t *req)
{
abort();
}
void e1_bearer_release_cmd(const e1ap_bearer_release_cmd_t *cmd)
{
abort();
}
int main(int argc, char *argv[])
{
stop = false;
__attribute__((unused)) struct sigaction oldaction;
sigaction(SIGINT, &sigint_action, &oldaction);
double SNR, snr0 = 0, snr1 = 20.0;
double snr_step = 1;
uint8_t snr1set = 0;
double **s_re, **s_im, **r_re, **r_im;
int trial, n_trials = 1, delay = 0;
double maxDoppler = 0.0;
uint8_t n_tx = 1, n_rx = 1;
channel_desc_t *UE2gNB;
uint8_t extended_prefix_flag = 0;
SCM_t channel_model = AWGN;
corr_level_t corr_level = CORR_LEVEL_LOW;
uint16_t N_RB_DL = 106, N_RB_UL = 106, mu = 1;
int srs_start_symbol = 13;
int srs_comb_size = 0;
int srs_comb_offset = 0;
int srs_cyclic_shift = 0;
int nb_symb_srs = 0;
int i;
int loglvl = OAILOG_WARNING;
int print_perf = 0;
int slot = 8;
int frame = 1;
cpuf = get_cpu_freq_GHz();
double DS_TDL = .03;
int threequarter_fs = 0;
uint64_t SSB_positions = 0x01;
uint16_t Nid_cell = 0;
if ((uniqCfg = load_configmodule(argc, argv, CONFIG_ENABLECMDLINEONLY)) == 0) {
exit_fun("[NR_SRSSIM] Error, configuration module init failed\n");
}
randominit();
/* initialize the sin-cos table */
InitSinLUT();
int c;
while ((c = getopt(argc, argv, "--:O:a:b:c:d:e:f:g:h:i:kl:m:n:p:s:u:y:z:A:B:C:H:PR:S:L:")) != -1) {
/* ignore long options starting with '--', option '-O' and their arguments that are handled by configmodule */
/* with this opstring getopt returns 1 for non-option arguments, refer to 'man 3 getopt' */
if (c == 1 || c == '-' || c == 'O')
continue;
printf("handling optarg %c\n", c);
switch (c) {
case 'a':
srs_start_symbol = atoi(optarg);
AssertFatal(srs_start_symbol >= 8 && srs_start_symbol <= 13, "start_symbol %d is not in 8..13\n", srs_start_symbol);
break;
case 'b':
nb_symb_srs = atoi(optarg);
AssertFatal(nb_symb_srs == 1 || nb_symb_srs == 2 || nb_symb_srs == 4,
"number of srs symbols %d is not 1,2,4\n",
nb_symb_srs);
nb_symb_srs >>= 1; // Value: 0 = 1 symbol, 1 = 2 symbols, 2 = 4 symbols
break;
case 'c':
n_rnti = atoi(optarg);
AssertFatal(n_rnti > 0 && n_rnti <= 65535, "Illegal n_rnti %x\n", n_rnti);
break;
case 'd':
delay = atoi(optarg);
break;
case 'e':
srs_comb_size = atoi(optarg);
AssertFatal(srs_comb_size >= 0 && srs_comb_size < 2, "comb_size %d is not in 0 or 1\n", srs_comb_size);
break;
case 'f':
srs_comb_offset = atoi(optarg);
if (srs_comb_size == 0) {
AssertFatal(srs_comb_offset >= 0 && srs_comb_offset <= 1, "comb_offset %d is not in 0...1\n", srs_comb_offset);
} else if (srs_comb_size == 1) {
AssertFatal(srs_comb_offset >= 0 && srs_comb_offset <= 3, "comb_offset %d is not in 0...3\n", srs_comb_offset);
}
break;
case 'g':
switch ((char)*optarg) {
case 'A':
channel_model = TDL_A;
DS_TDL = 0.030; // 30 ns
printf("Channel model: TDLA30\n");
break;
case 'B':
channel_model = TDL_B;
DS_TDL = 0.100; // 100ns
printf("Channel model: TDLB100\n");
break;
case 'C':
channel_model = TDL_C;
DS_TDL = 0.300; // 300 ns
printf("Channel model: TDLC300\n");
break;
default:
printf("Unsupported channel model!\n");
exit(-1);
}
if (optarg[1] == ',') {
switch (optarg[2]) {
case 'l':
corr_level = CORR_LEVEL_LOW;
break;
case 'm':
corr_level = CORR_LEVEL_MEDIUM;
break;
case 'h':
corr_level = CORR_LEVEL_HIGH;
break;
default:
printf("Invalid correlation level!\n");
}
}
if (optarg[3] == ',') {
maxDoppler = atoi(&optarg[4]);
printf("Maximum Doppler Frequency: %.0f Hz\n", maxDoppler);
}
break;
case 'i':
srs_cyclic_shift = atoi(optarg);
if (srs_comb_size == 0) {
AssertFatal(srs_cyclic_shift >= 0 && srs_cyclic_shift <= 7, "comb_shift %d is not in 0...7\n", srs_cyclic_shift);
} else if (srs_comb_size == 1) {
AssertFatal(srs_cyclic_shift >= 0 && srs_cyclic_shift <= 11, "comb_shift %d is not in 0...11\n", srs_cyclic_shift);
}
break;
case 'k':
printf("Setting threequarter_fs_flag\n");
threequarter_fs = 1;
break;
case 'n':
n_trials = atoi(optarg);
break;
case 'p':
extended_prefix_flag = 1;
break;
case 's':
snr0 = atof(optarg);
printf("Setting SNR0 to %f\n", snr0);
break;
case 'u':
mu = atoi(optarg);
break;
case 'y':
n_tx = atoi(optarg);
if ((n_tx == 0) || (n_tx > 4)) {
printf("Unsupported number of tx antennas %d\n", n_tx);
exit(-1);
}
break;
case 'z':
n_rx = atoi(optarg);
if ((n_rx == 0) || (n_rx > 8)) {
printf("Unsupported number of rx antennas %d\n", n_rx);
exit(-1);
}
break;
case 'H':
slot = atoi(optarg);
break;
case 'R':
N_RB_DL = atoi(optarg);
N_RB_UL = N_RB_DL;
break;
case 'S':
snr1 = atof(optarg);
snr1set = 1;
printf("Setting SNR1 to %f\n", snr1);
break;
case 'P':
print_perf = 1;
cpu_meas_enabled = 1;
break;
case 'L':
loglvl = atoi(optarg);
break;
default:
case 'h':
printf("%s -h(elp)\n", argv[0]);
printf("-a SRS starting symbol (8 .. 13)\n");
printf("-b SRS number of symbols (1, 2, 4)\n");
printf("-c RNTI\n");
printf("-d Introduce delay in terms of number of samples\n");
printf("-e SRS comb size, 0 (comb size 2), 1 (comb size 4) \n");
printf("-f SRS comb offset, 0 .. 1 (comb size 2), 0 .. 3 (comb size 4) \n");
printf(
"-g Channel model configuration. Arguments list: Number of arguments = 3, {Channel model: [A] TDLA30, [B] TDLB100, [C] "
"TDLC300}, {Correlation: [l] Low, [m] Medium, [h] High}, {Maximum Doppler shift} e.g. -g A,l,10\n");
printf("-h This message\n");
printf("-i SRS cyclic shift, 0 .. 7 (comb size 2), 0 .. 11 (comb size 4) \n");
printf("-k 3/4 sampling\n");
printf("-n Number of trials to simulate\n");
printf("-p Use extended prefix mode\n");
printf("-s Starting SNR, runs from SNR0 to SNR0 + 10 dB if ending SNR isn't given\n");
printf("-S Ending SNR, runs from SNR0 to SNR1\n");
printf("-u Set the numerology\n");
printf("-y Number of TX antennas used at UE\n");
printf("-z Number of RX antennas used at gNB\n");
printf("-H Slot number\n");
printf("-L <log level, 0(errors), 1(warning), 2(info) 3(debug) 4 (trace)>\n");
printf("-P Print SRS performances\n");
printf("-R Maximum number of available resorce blocks (N_RB_DL)\n");
exit(-1);
break;
}
}
logInit();
set_glog(loglvl);
int ret = 1;
if (snr1set == 0)
snr1 = snr0 + 10;
double sampling_rate, tx_bandwidth, rx_bandwidth;
uint32_t samples;
get_samplerate_and_bw(mu, N_RB_DL, threequarter_fs, &sampling_rate, &samples, &tx_bandwidth, &rx_bandwidth);
// Initialize gNB
gNB = calloc_or_fail(1, sizeof(PHY_VARS_gNB));
gNB->ofdm_offset_divisor = UINT_MAX;
gNB->RU_list[0] = calloc_or_fail(1, sizeof(**gNB->RU_list));
gNB->RU_list[0]->rfdevice.openair0_cfg = openair0_cfg;
NR_DL_FRAME_PARMS *fp = &gNB->frame_parms;
fp->N_RB_DL = N_RB_DL;
fp->N_RB_UL = N_RB_UL;
fp->Ncp = extended_prefix_flag ? EXTENDED : NORMAL;
fp->nb_antennas_tx = n_tx;
fp->nb_antennas_rx = n_rx;
fp->threequarter_fs = threequarter_fs;
nr_phy_config_request_sim(gNB, N_RB_UL, N_RB_UL, mu, Nid_cell, SSB_positions);
printf("dl freq %" PRIu64 " , ul freq %" PRIu64 " \n", fp->dl_CarrierFreq, fp->ul_CarrierFreq);
do_tdd_config_sim(gNB, mu);
phy_init_nr_gNB(gNB);
// Initialize UE
UE = calloc_or_fail(1, sizeof(PHY_VARS_NR_UE));
memcpy(&UE->frame_parms, fp, sizeof(NR_DL_FRAME_PARMS)); // setting same frame parameters as gNB
/* RU handles rxdataF, and gNB just has a pointer. Here, we don't have an RU,
* so we need to allocate that memory as well. First index in rxdataF[0] index refers to beams*/
for (i = 0; i < n_rx; i++)
gNB->common_vars.rxdataF[0][i] = malloc16_clear(fp->samples_per_frame_wCP * sizeof(int32_t));
/* no RU: need to have rxdata */
c16_t **rxdata;
rxdata = malloc_or_fail(n_rx * sizeof(*rxdata));
for (i = 0; i < n_rx; i++)
rxdata[i] = malloc16_clear(fp->samples_per_frame * sizeof(c16_t));
/* no memory allocated for UE common_vars: need to have txdata and txdataF */
c16_t **txdata;
txdata = malloc_or_fail(n_tx * sizeof(*txdata));
for (i = 0; i < n_tx; i++)
txdata[i] = malloc16_clear(fp->samples_per_frame * sizeof(c16_t));
c16_t **txdataF;
txdataF = malloc_or_fail(n_tx * sizeof(*txdataF));
for (i = 0; i < n_tx; i++)
txdataF[i] = malloc16_clear(fp->samples_per_frame_wCP * sizeof(c16_t));
// Configure channel model
UE2gNB = new_channel_desc_scm(n_tx,
n_rx,
channel_model,
sampling_rate / 1e6,
fp->ul_CarrierFreq,
tx_bandwidth,
DS_TDL,
maxDoppler,
corr_level,
0,
delay,
0,
0);
if (UE2gNB == NULL) {
printf("Problem generating channel model. Exiting.\n");
exit(-1);
}
// Allocate memory to intermediate variables to apply channel
int slot_length = get_samples_per_slot(slot, fp);
s_re = malloc_or_fail(n_tx * sizeof(double *));
s_im = malloc_or_fail(n_tx * sizeof(double *));
r_re = malloc_or_fail(n_rx * sizeof(double *));
r_im = malloc_or_fail(n_rx * sizeof(double *));
for (int aatx = 0; aatx < n_tx; aatx++) {
s_re[aatx] = calloc_or_fail(1, slot_length * sizeof(double));
s_im[aatx] = calloc_or_fail(1, slot_length * sizeof(double));
}
for (int aarx = 0; aarx < n_rx; aarx++) {
r_re[aarx] = calloc_or_fail(1, slot_length * sizeof(double));
r_im[aarx] = calloc_or_fail(1, slot_length * sizeof(double));
}
//----------- configure SRS ----------------------------
long locationAndBandwidth = PRBalloc_to_locationandbandwidth(N_RB_DL, 0);
// Configure SRS parameters at gNB
const uint16_t m_SRS[64] = {4, 8, 12, 16, 16, 20, 24, 24, 28, 32, 36, 40, 48, 48, 52, 56,
60, 64, 72, 72, 76, 80, 88, 96, 96, 104, 112, 120, 120, 120, 128, 128,
128, 132, 136, 144, 144, 144, 144, 152, 160, 160, 160, 168, 176, 184, 192, 192,
192, 192, 208, 216, 224, 240, 240, 240, 240, 256, 256, 256, 264, 272, 272, 272};
nfapi_nr_srs_pdu_t srs_pdu = {.rnti = n_rnti,
.bwp_size = NRRIV2BW(locationAndBandwidth, 275),
.bwp_start = NRRIV2PRBOFFSET(locationAndBandwidth, 275),
.subcarrier_spacing = fp->numerology_index,
.cyclic_prefix = extended_prefix_flag,
.num_ant_ports = n_tx == 4 ? 2
: n_tx == 2 ? 1
: 0,
.num_symbols = nb_symb_srs,
.num_repetitions = 0, // Value: 0 = 1, 1 = 2, 2 = 4
.time_start_position = fp->symbols_per_slot - 1 - srs_start_symbol,
.bandwidth_index = 0,
.config_index = rrc_get_max_nr_csrs(srs_pdu.bwp_size, srs_pdu.bandwidth_index),
.sequence_id = 40,
.comb_size = srs_comb_size,
.comb_offset = srs_comb_offset,
.cyclic_shift = srs_cyclic_shift,
.frequency_position = 0,
.frequency_shift = 0,
.frequency_hopping = 0,
.group_or_sequence_hopping = 0,
.resource_type = NR_SRS_Resource__resourceType_PR_periodic,
.t_srs = 1,
.t_offset = 0,
.srs_parameters_v4.srs_bandwidth_size = m_SRS[srs_pdu.config_index],
.srs_parameters_v4.usage = 1 << NR_SRS_ResourceSet__usage_codebook,
.srs_parameters_v4.report_type[0] = 1,
.srs_parameters_v4.iq_representation = 1,
.srs_parameters_v4.prg_size = 1,
.srs_parameters_v4.num_total_ue_antennas = 1 << srs_pdu.num_ant_ports,
.beamforming.num_prgs = m_SRS[srs_pdu.config_index],
.beamforming.prg_size = 1};
gNB->srs->srs_pdu = srs_pdu;
gNB->srs->active = true;
gNB->srs->beam_nb = 0;
gNB->srs->frame = frame;
gNB->srs->slot = slot;
// Configure SRS parameters at UE
fapi_nr_ul_config_srs_pdu srs_config_pdu = {.rnti = srs_pdu.rnti,
.bwp_size = srs_pdu.bwp_size,
.bwp_start = srs_pdu.bwp_start,
.subcarrier_spacing = srs_pdu.subcarrier_spacing,
.cyclic_prefix = srs_pdu.cyclic_prefix,
.num_ant_ports = srs_pdu.num_ant_ports,
.num_symbols = srs_pdu.num_symbols,
.num_repetitions = srs_pdu.num_repetitions,
.time_start_position = srs_pdu.time_start_position,
.bandwidth_index = srs_pdu.bandwidth_index,
.config_index = srs_pdu.config_index,
.sequence_id = srs_pdu.sequence_id,
.comb_size = srs_pdu.comb_size,
.comb_offset = srs_pdu.comb_offset,
.cyclic_shift = srs_pdu.cyclic_shift,
.frequency_position = srs_pdu.frequency_position,
.frequency_shift = srs_pdu.frequency_shift,
.frequency_hopping = srs_pdu.frequency_hopping,
.group_or_sequence_hopping = srs_pdu.group_or_sequence_hopping,
.resource_type = srs_pdu.resource_type,
.t_srs = srs_pdu.t_srs,
.t_offset = srs_pdu.t_offset,
.beamforming.num_prgs = srs_pdu.beamforming.num_prgs,
.beamforming.prg_size = srs_pdu.beamforming.prg_size};
nr_phy_data_tx_t phy_data = {0};
phy_data.srs_vars.active = true;
phy_data.srs_vars.srs_config_pdu = srs_config_pdu;
UE->nr_srs_info = malloc16_clear(sizeof(nr_srs_info_t));
//----------- UE TX SRS procedures ---------------------
UE_nr_rxtx_proc_t proc;
proc.frame_rx = frame;
proc.frame_tx = frame;
proc.nr_slot_tx = slot;
proc.nr_slot_rx = slot;
bool was_symbol_used[NR_NUMBER_OF_SYMBOLS_PER_SLOT] = {0};
int slot_offset = get_samples_slot_timestamp(fp, slot);
uint16_t ofdm_symbol_size = fp->ofdm_symbol_size;
int slot_offsetF = (slot % RU_RX_SLOT_DEPTH) * fp->symbols_per_slot * ofdm_symbol_size;
c16_t *txF[n_tx];
for (i = 0; i < n_tx; i++)
txF[i] = txdataF[i] + slot_offsetF;
c16_t *txd[n_tx];
for (i = 0; i < n_tx; i++)
txd[i] = txdata[i] + slot_offset;
ue_srs_procedures_nr(UE, &proc, (c16_t **)txF, &phy_data, was_symbol_used);
//------------ TX rotation and OFDM Modulation --------------------------
nr_tx_rotation_and_ofdm_mod(slot, fp, n_tx, txF, txd, link_type_ul, was_symbol_used, false);
//----------- Apply propagation channel and add noise ----------------------------
double ts = 1.0 / (fp->subcarrier_spacing * ofdm_symbol_size);
for (i = 0; i < slot_length; i++) {
for (int aa = 0; aa < n_tx; aa++) {
s_re[aa][i] = (double)txdata[aa][slot_offset + i].r;
s_im[aa][i] = (double)txdata[aa][slot_offset + i].i;
}
}
// Compute SRS symbol offset and length
int symbol_offset = slot_offset;
int abs_first_symbol = slot * fp->symbols_per_slot;
int idx_sym;
for (idx_sym = abs_first_symbol; idx_sym < abs_first_symbol + srs_start_symbol; idx_sym++)
symbol_offset += (idx_sym % (0x7 << fp->numerology_index)) ? fp->nb_prefix_samples : fp->nb_prefix_samples0;
symbol_offset += ofdm_symbol_size * srs_start_symbol;
int symbol_length = ofdm_symbol_size + (idx_sym % (0x7 << fp->numerology_index)) ? fp->nb_prefix_samples : fp->nb_prefix_samples0;
// Compute transmitter energy level
double txlev_sum = compute_tx_energy_level(txdata, n_tx, symbol_offset, symbol_length, n_trials);
for (SNR = snr0; SNR <= snr1 && !stop; SNR += snr_step) {
varArray_t *table_rx = initVarArray(1000, sizeof(double));
reset_meas(&gNB->rx_srs_stats);
reset_meas(&gNB->generate_srs_stats);
reset_meas(&gNB->get_srs_signal_stats);
reset_meas(&gNB->srs_channel_estimation_stats);
reset_meas(&gNB->srs_timing_advance_stats);
double sum_srs_snr = 0;
int tao_ns_count = 0;
for (trial = 0; trial < n_trials && !stop; trial++) {
// Estimate noise power from the transmitter level and SNR
double sigma = compute_noise_variance(txlev_sum, ofdm_symbol_size, srs_pdu.bwp_size, 1, SNR, n_trials);
//----------- Apply propagation channel ----------------------------
multipath_channel(UE2gNB, s_re, s_im, r_re, r_im, slot_length, 0, (n_trials == 1) ? 1 : 0);
//----------- Add noise ----------------------------
add_noise(rxdata,
(const double **)r_re,
(const double **)r_im,
sigma, // noise power
slot_length,
slot_offset,
ts,
0, // delay
0, // pdu_bit_map
0, // PTRS_BITMAP,
n_rx);
//----------- OFDM Demodulation and RX rotation--------------------------
nr_ofdm_demod_and_rx_rotation(rxdata,
gNB->common_vars.rxdataF[0],
fp,
n_rx,
slot,
slot_offsetF,
link_type_ul,
was_symbol_used);
//----------- UE RX SRS procedures ---------------------
start_meas(&gNB->rx_srs_stats);
NR_gNB_SRS_t *srs = &gNB->srs[0];
uint8_t N_symb_SRS = 1 << srs->srs_pdu.num_symbols;
uint8_t N_ap = 1 << srs->srs_pdu.num_ant_ports;
int16_t snr_per_rb[srs->srs_pdu.bwp_size];
uint16_t timing_advance_offset;
int16_t timing_advance_offset_nsec[n_rx];
int srs_est;
c16_t srs_estimated_channel_freq[n_rx][N_ap][ofdm_symbol_size * N_symb_SRS] __attribute__((aligned(32)));
c16_t srs_estimated_channel_time[n_rx][N_ap][NR_SRS_IDFT_OVERSAMP_FACTOR * ofdm_symbol_size] __attribute__((aligned(32)));
nr_srs_rx_procedures(gNB,
frame,
slot,
n_rx,
N_ap,
N_symb_SRS,
ofdm_symbol_size,
srs,
gNB->nr_srs_info[0],
&srs_est,
srs_estimated_channel_freq,
srs_estimated_channel_time,
snr_per_rb,
&timing_advance_offset,
timing_advance_offset_nsec);
sum_srs_snr += pow(10, (double)gNB->srs->snr / 10.0);
int16_t delay_ns = delay * 1e9 / (fp->samples_per_frame * 100);
for (int ant_idx = 0; ant_idx < n_rx; ant_idx++) {
if (n_trials == 1)
printf("[RX ant %d] SRS estimated: TA offset %d, TA offset ns %d \n",
ant_idx,
timing_advance_offset,
timing_advance_offset_nsec[ant_idx]);
if (timing_advance_offset_nsec[ant_idx] == delay_ns)
tao_ns_count++;
}
stop_meas(&gNB->rx_srs_stats);
} // trail loop
float tao_ns_rate = (float)tao_ns_count / (n_trials * n_rx);
float SRS_SNR_dB = 10 * log10(sum_srs_snr / n_trials);
printf("Actual SNR : %f, Estimated SNR from SRS %f (dB), TA offset success rate %f %%\n", SNR, SRS_SNR_dB, tao_ns_rate * 100);
if (print_perf == 1) {
printf("\ngNB RX\n");
printDistribution(&gNB->rx_srs_stats, table_rx, "RX SRS time");
printStatIndent(&gNB->generate_srs_stats, "Generate SRS sequence time");
printStatIndent(&gNB->get_srs_signal_stats, "Get SRS signal time");
printStatIndent(&gNB->srs_channel_estimation_stats, "SRS channel estimation time");
printStatIndent(&gNB->srs_timing_advance_stats, "SRS timing advance estimation time");
printf("\n");
}
free(table_rx);
int srs_ret = 1;
if (SNR > 30 && SRS_SNR_dB > 30) {
srs_ret = 0;
} else if (SNR >= SRS_SNR_dB) {
srs_ret = SRS_SNR_dB >= 0.7 * SNR ? 0 : 1;
} else if (SRS_SNR_dB > SNR) {
srs_ret = SNR >= 0.7 * SRS_SNR_dB ? 0 : 1;
}
if (tao_ns_rate > 0.9 && srs_ret == 0) {
ret = 0;
break;
}
} // SNR loop
printf("*************\n");
printf("SRS test %s\n", ret == 0 ? "OK" : "FAILED");
printf("*************\n");
// free memory
for (i = 0; i < n_tx; i++) {
free(s_re[i]);
free(s_im[i]);
free(txdata[i]);
free(txdataF[i]);
}
free(s_re);
free(s_im);
free(txdata);
free(txdataF);
for (i = 0; i < n_rx; i++) {
free(r_re[i]);
free(r_im[i]);
free(rxdata[i]);
free(gNB->common_vars.rxdataF[0][i]);
}
free(r_re);
free(r_im);
free(rxdata);
phy_free_nr_gNB(gNB);
free_channel_desc_scm(UE2gNB);
free_and_zero(UE->nr_srs_info);
free(gNB->RU_list[0]);
free(UE);
return ret;
}
Reference in New Issue View Git Blame Copy Permalink