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openairinterface5g/openair1/SIMULATION/NR_PHY/ulsim_mu_mimo.c
Rakesh Mundlamuri b1a2131e0b Introduce uplink multi-user MIMO (MU-MIMO) simulator 
This commit introduces a dedicated simulation environment to validate
the uplink MU-MIMO joint processing framework. It models a scenario
where a single gNB serves multiple spatially multiplexed UEs sharing
the exact same time and frequency resources.

The simulator executes the complete physical layer baseband pipeline:
- PUSCH data generation and LDPC encoding per UE
- OFDM modulation (TX)
- Signal propagation through a multi-path channel model
- OFDM demodulation (RX) at the gNB
- Joint PUSCH decoding, equalization, and spatial demultiplexing

Performance metrics such as scrambling errors and BLER per UE is
evaluated at the end of the simulation.

Signed-off-by: Rakesh Mundlamuri <rakesh.mundlamuri@openairinterface.org>
2026-06-04 13:27:06 +05:30

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/*
* SPDX-License-Identifier: LicenseRef-CSSL-1.0
*/
#include <limits.h>
#include <math.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <bits/getopt_core.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 "executables/softmodem-common.h"
#include "NR_BCCH-BCH-Message.h"
#include "NR_MAC_COMMON/nr_mac.h"
#include "NR_MAC_COMMON/nr_mac_common.h"
#include "NR_MAC_UE/mac_defs.h"
#include "NR_MAC_gNB/nr_mac_gNB.h"
#include "NR_PHY_INTERFACE/NR_IF_Module.h"
#include "NR_ReconfigurationWithSync.h"
#include "NR_ServingCellConfig.h"
#include "NR_UE-NR-Capability.h"
#include "PHY/CODING/nrLDPC_coding/nrLDPC_coding_interface.h"
#include "PHY/INIT/nr_phy_init.h"
#include "PHY/MODULATION/nr_modulation.h"
#include "PHY/NR_REFSIG/dmrs_nr.h"
#include "PHY/NR_REFSIG/ul_ref_seq_nr.h"
#include "PHY/NR_TRANSPORT/nr_transport_common_proto.h"
#include "PHY/NR_TRANSPORT/nr_ulsch.h"
#include "PHY/NR_UE_TRANSPORT/nr_transport_ue.h"
#include "PHY/TOOLS/tools_defs.h"
#include "PHY/defs_RU.h"
#include "PHY/defs_gNB.h"
#include "PHY/defs_nr_UE.h"
#include "PHY/defs_nr_common.h"
#include "PHY/impl_defs_nr.h"
#include "PHY/phy_vars_nr_ue.h"
#include "SCHED_NR/sched_nr.h"
#include "SCHED_NR_UE/defs.h"
#include "SCHED_NR_UE/fapi_nr_ue_l1.h"
#include "asn_internal.h"
#include "common/config/config_load_configmodule.h"
#include "common/ngran_types.h"
#include "common/openairinterface5g_limits.h"
#include "common/ran_context.h"
#include "common/utils/LOG/log.h"
#include "common/utils/bits.h"
#include "common/utils/T/T.h"
#include "common/utils/threadPool/thread-pool.h"
#include "common_lib.h"
#include "e1ap_messages_types.h"
#include "executables/nr-uesoftmodem.h"
#include "fapi_nr_ue_constants.h"
#include "fapi_nr_ue_interface.h"
#include "nfapi_interface.h"
#include "nfapi_nr_interface_scf.h"
#include "nr_ue_phy_meas.h"
#include "openair1/SIMULATION/NR_PHY/nr_unitary_defs.h"
#include "openair1/SIMULATION/TOOLS/sim.h"
#include "openair2/LAYER2/NR_MAC_UE/mac_proto.h"
#include "openair2/LAYER2/NR_MAC_gNB/mac_proto.h"
#include "openair2/LAYER2/NR_MAC_gNB/nr_radio_config.h"
#include "time_meas.h"
#include "utils.h"
// #define DEBUG_ULSIM
#define MAX_NUM_UE 2
const char *__asan_default_options()
{
/* don't do leak checking in nr_ulsim, not finished yet */
return "detect_leaks=0";
}
PHY_VARS_gNB *gNB;
PHY_VARS_NR_UE *UE[MAX_NUM_UE];
RAN_CONTEXT_t RC;
char *uecap_file;
int64_t uplink_frequency_offset[MAX_NUM_CCs][4];
double cpuf;
// uint8_t nfapi_mode = 0;
uint64_t downlink_frequency[MAX_NUM_CCs][4];
THREAD_STRUCT thread_struct;
nfapi_ue_release_request_body_t release_rntis;
// Fixme: Uniq dirty DU instance, by global var, datamodel need better management
instance_t DUuniqInstance = 0;
instance_t CUuniqInstance = 0;
// NTN cellSpecificKoffset-r17, but in slots for DL SCS
unsigned int NTN_UE_Koffset = 0;
void nr_derive_key_ng_ran_star(uint16_t pci, uint64_t nr_arfcn_dl, const uint8_t key[32], uint8_t *key_ng_ran_star)
{
}
/* this is a hack, but necessary for E2 agent. We compile in all of RRC
* (because of CMakeLists.txt), but we don't need it (only nr_radio_config.c).
* however, if E2 agent is defined, the following functions are used in
* rrc_gNB.c, but defined in RAN functions. In order to avoid pulling this in
* here as well, only provide a prototype (and abort if they are ever called). */
void signal_rrc_msg(void /*const nr_rrc_class_e nr_channel, const uint32_t rrc_msg_id, const byte_array_t rrc_ba*/)
{
abort();
}
void signal_rrc_state_changed_to(void /* const gNB_RRC_UE_t *rrc_ue_context, const rrc_state_e2sm_rc_e rrc_state */)
{
abort();
}
void signal_ue_id(void /* const gNB_RRC_UE_t *rrc_ue_context, const uint16_t class, const uint32_t msg_id */)
{
abort();
}
extern void fix_scd(NR_ServingCellConfig_t *scd); // forward declaration
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();
}
int8_t nr_rrc_RA_succeeded(const module_id_t mod_id, const uint8_t gNB_index)
{
return 0;
}
int DU_send_INITIAL_UL_RRC_MESSAGE_TRANSFER(module_id_t module_idP,
int CC_idP,
int UE_id,
rnti_t rntiP,
const uint8_t *sduP,
sdu_size_t sdu_lenP,
const uint8_t *sdu2P,
sdu_size_t sdu2_lenP)
{
return 0;
}
void nr_derive_key(int alg_type, uint8_t alg_id, const uint8_t key[32], uint8_t out[16])
{
(void)alg_type;
}
void processSlotTX(void *arg)
{
}
nrUE_params_t nrUE_params;
nrUE_params_t *get_nrUE_params(void)
{
return &nrUE_params;
}
// needed for some functions
uint16_t n_rnti = 0x1234;
openair0_config_t openair0_cfg[MAX_CARDS];
configmodule_interface_t *uniqCfg = NULL;
int main(int argc, char *argv[])
{
stop = false;
__attribute__((unused)) struct sigaction oldaction;
sigaction(SIGINT, &sigint_action, &oldaction);
int i;
double SNR, snr0 = -2.0, snr1 = 2.0;
double snr_step = .2;
uint8_t snr1set = 0;
int slot = 8, frame = 1;
float ***s_interleaved, **r_re, **r_im;
float **r_re_tmp, **r_im_tmp;
int trial, n_trials = 1, delay = 0;
double maxDoppler = 0.0;
uint8_t n_tx = 1, n_rx = 1;
channel_desc_t *UE2gNB[MAX_NUM_UE];
uint8_t extended_prefix_flag = 0;
SCM_t channel_model = AWGN; // Rayleigh1_anticorr;
corr_level_t corr_level = CORR_LEVEL_LOW;
uint16_t N_RB_DL = 106, N_RB_UL = 106, mu = 1;
uint8_t length_dmrs = pusch_len1;
int loglvl = OAILOG_WARNING;
uint16_t nb_symb_sch = 12;
int start_symbol = 0;
uint16_t nb_rb = 50;
int Imcs = 9;
uint8_t precod_nbr_layers = 1;
int tx_offset;
double txlev[MAX_NUM_UE] = {0};
double sigma;
int start_rb = 0;
int print_perf = 0;
cpuf = get_cpu_freq_GHz();
bool no_phase_pre_comp = false;
int rv_index = 0;
float eff_tp_check = 100;
uint8_t max_rounds = 4;
int chest_type[2] = {0};
int modify_dmrs = 0;
int dmrs_arg[4] = {-1, -1, -1, -1}; // Invalid values
uint8_t NUM_UE = 1;
uint8_t transform_precoding = transformPrecoder_disabled; // 0 - ENABLE, 1 - DISABLE
uint8_t num_dmrs_cdm_grps_no_data = 1;
uint8_t mcs_table = 0;
int ilbrm = 0;
double DS_TDL = .03;
int threadCnt = 0;
int max_ldpc_iterations = 5;
int num_antennas_per_thread = 1;
uint32_t log_format = 0;
int threequarter_fs = 0;
if ((uniqCfg = load_configmodule(argc, argv, CONFIG_ENABLECMDLINEONLY)) == 0) {
exit_fun("[NR_ULSIM] Error, configuration module init failed\n");
}
int ul_proc_error = 0; // uplink processing checking status flag
randominit();
/* initialize the sin-cos table */
InitSinLUT();
int c;
bool setAffinity = false;
char gNBthreads[128] = "n";
void *h_tx_sig_pinned = NULL;
while ((c = getopt(argc, argv, "--:O:a:b:c:d:ef:g:h:i:jk:l:m:n:o::p:q:r:s:t:u:v:w:y:z:A:C:F:G:H:I:M:N:PR:S:T:U:L:ZW:E:X:Y:"))
!= -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':
start_symbol = atoi(optarg);
AssertFatal(start_symbol >= 0 && start_symbol < 13, "start_symbol %d is not in 0..12\n", start_symbol);
break;
case 'b':
nb_symb_sch = atoi(optarg);
AssertFatal(nb_symb_sch > 0 && nb_symb_sch < 15, "start_symbol %d is not in 1..14\n", nb_symb_sch);
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 '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':
i = 0;
do {
chest_type[i >> 1] = atoi(&optarg[i]);
i += 2;
} while (optarg[i - 1] == ',');
break;
case 'j':
log_format |= MATLAB_RAW;
break;
case 'k':
printf("Setting threequarter_fs_flag\n");
threequarter_fs = 1;
break;
case 'l':
length_dmrs = atoi(optarg);
AssertFatal(length_dmrs == 1 || length_dmrs == 2, "Illegal PUSCH DMRS length %d\n", length_dmrs);
printf("PUSCH DMRS length %d\n", length_dmrs);
break;
case 'm':
Imcs = atoi(optarg);
break;
case 'W':
precod_nbr_layers = atoi(optarg);
AssertFatal(precod_nbr_layers > 0 && precod_nbr_layers <= NR_MAX_NB_LAYERS,
"Number of layers per UE %d should be less than or equal to %d\n",
precod_nbr_layers,
NR_MAX_NB_LAYERS);
break;
case 'n':
n_trials = atoi(optarg);
break;
case 'p':
extended_prefix_flag = 1;
break;
case 'q':
mcs_table = atoi(optarg);
break;
case 'r':
nb_rb = atoi(optarg);
break;
case 's':
snr0 = atof(optarg);
printf("Setting SNR0 to %f\n", snr0);
break;
case 'C':
threadCnt = atoi(optarg);
break;
case 'u':
mu = atoi(optarg);
break;
case 'v':
max_rounds = atoi(optarg);
AssertFatal(max_rounds > 0 && max_rounds < 16, "Unsupported number of rounds %d, should be in [1,16]\n", max_rounds);
break;
case 'w':
start_rb = atoi(optarg);
break;
case 't':
eff_tp_check = atof(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 'A':
num_antennas_per_thread = atoi(optarg);
break;
case 'H':
slot = atoi(optarg);
break;
case 'I':
max_ldpc_iterations = atoi(optarg);
break;
case 'M':
ilbrm = atoi(optarg);
break;
case 'N':
NUM_UE = atoi(optarg);
AssertFatal(NUM_UE > 0 && NUM_UE <= MAX_NUM_UE, "Unsupported number of UEs %d\n", NUM_UE);
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;
case 'U':
modify_dmrs = 1;
i = 0;
do {
dmrs_arg[i >> 1] = atoi(&optarg[i]);
i += 2;
} while (optarg[i - 1] == ',');
break;
case 'Y':
threadCnt = sizeof(gNBthreads) - 1;
strncpy(gNBthreads, optarg, threadCnt);
gNBthreads[threadCnt] = 0;
setAffinity = true;
break;
case 'Z':
transform_precoding = transformPrecoder_enabled;
num_dmrs_cdm_grps_no_data = 2;
mcs_table = 3;
printf("NOTE: TRANSFORM PRECODING (SC-FDMA) is ENABLED in UPLINK (0 - ENABLE, 1 - DISABLE) : %d \n", transform_precoding);
break;
default:
case 'h':
printf("%s -h(elp)\n", argv[0]);
printf("-a ULSCH starting symbol\n");
printf("-b ULSCH number of symbols\n");
printf("-c RNTI\n");
printf("-d Introduce delay in terms of number of samples\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 Change channel estimation technique. Arguments list: Number of arguments=2, Frequency domain {0:Linear "
"interpolation, 1:PRB based averaging}, Time domain {0:Estimates of last DMRS symbol, 1:Average of DMRS symbols}. e.g. "
"-i 1,0\n");
printf("-j Save signal buffers in binary format.");
printf("-k 3/4 sampling\n");
printf("-l PUSCH DMRS length: 1 or 2\n");
printf("-m MCS value\n");
printf("-n Number of trials to simulate\n");
printf("-p Use extended prefix mode\n");
printf("-q MCS table\n");
printf("-r Number of allocated resource blocks for PUSCH\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("-t Acceptable effective throughput (in percentage)\n");
printf("-u Set the numerology\n");
printf("-v Set the max rounds\n");
printf("-w Start PRB for PUSCH\n");
printf("-y Number of TX antennas used per UE\n");
printf("-z Number of RX antennas used at gNB\n");
printf("-A Number of antennas per thread for PUSCH channel estimation\n");
printf("-C Specify the number of threads for the simulation\n");
printf("-H Slot number\n");
printf("-I Maximum LDPC decoder iterations\n");
printf("-L <log level, 0(errors), 1(warning), 2(info) 3(debug) 4 (trace)>\n");
printf("-M Use limited buffer rate-matching\n");
printf("-N Number of UEs\n");
printf("-P Print ULSCH performances\n");
printf("-R Maximum number of available resorce blocks (N_RB_DL)\n");
printf(
"-U Change DMRS Config, arguments list: Number of arguments=4, DMRS Mapping Type{0=A,1=B}, DMRS AddPos{0:3}, DMRS "
"Config Type{1,2}, Number of CDM groups without data{1,2,3} e.g. -U 0,2,0,1 \n");
printf("-W Number of layers for PUSCH per UE\n");
printf("-Z If -Z is used, SC-FDMA or transform precoding is enabled in Uplink \n");
exit(-1);
break;
}
}
AssertFatal(precod_nbr_layers <= min(n_tx, n_rx),
"Number of layers %d cannot be more than min(n_tx %d, n_rx %d)\n",
precod_nbr_layers,
n_tx,
n_rx);
uint8_t total_layers = precod_nbr_layers * NUM_UE;
AssertFatal(total_layers <= NR_MAX_NB_LAYERS,
"Total number of layers %d cannot be more than NR_MAX_NB_LAYERS %d\n",
total_layers,
NR_MAX_NB_LAYERS);
AssertFatal(total_layers <= n_rx, "Total number of layers %d cannot be more than n_rx %d\n", total_layers, n_rx);
logInit();
set_glog(loglvl);
get_softmodem_params()->phy_test = 1;
get_softmodem_params()->do_ra = 0;
if (snr1set == 0)
snr1 = snr0 + 10;
double sampling_frequency, tx_bandwidth, rx_bandwidth;
get_samplerate_and_bw(mu, N_RB_DL, threequarter_fs, &sampling_frequency, &tx_bandwidth, &rx_bandwidth);
RC.gNB = (PHY_VARS_gNB **)malloc_or_fail(sizeof(PHY_VARS_gNB *));
RC.gNB[0] = calloc_or_fail(1, sizeof(PHY_VARS_gNB));
gNB = RC.gNB[0];
gNB->ofdm_offset_divisor = UINT_MAX;
gNB->num_pusch_symbols_per_thread = 1;
gNB->dmrs_num_antennas_per_thread = num_antennas_per_thread;
gNB->RU_list[0] = calloc_or_fail(1, sizeof(**gNB->RU_list));
gNB->RU_list[0]->rfdevice.openair0_cfg = openair0_cfg;
if (setAffinity == false)
initFloatingCoresTpool(threadCnt, &gNB->threadPool, false, "gNB-tpool");
else
initNamedTpool(gNBthreads, &gNB->threadPool, true, "gNB-tpool");
NR_UL_IND_t UL_INFO = {0};
UL_INFO.crc_ind.crc_list = UL_INFO.crc_pdu_list;
UL_INFO.rx_ind.pdu_list = UL_INFO.rx_pdu_list;
UL_INFO.rx_ind.number_of_pdus = 0;
UL_INFO.crc_ind.number_crcs = 0;
gNB->max_ldpc_iterations = max_ldpc_iterations;
gNB->pusch_thres = -20;
gNB->frame_parms.N_RB_DL = N_RB_DL;
gNB->frame_parms.N_RB_UL = N_RB_UL;
gNB->frame_parms.Ncp = extended_prefix_flag ? NR_EXTENDED : NR_NORMAL;
AssertFatal((gNB->if_inst = NR_IF_Module_init(0)) != NULL, "Cannot register interface");
gNB->if_inst->NR_PHY_config_req = nr_phy_config_request;
s_interleaved = calloc_or_fail(NUM_UE, sizeof(float **));
for (int u = 0; u < NUM_UE; u++) {
s_interleaved[u] = malloc_or_fail(n_tx * sizeof(float *));
}
r_re = malloc_or_fail(n_rx * sizeof(float *));
r_im = malloc_or_fail(n_rx * sizeof(float *));
r_re_tmp = malloc_or_fail(n_rx * sizeof(float *));
r_im_tmp = malloc_or_fail(n_rx * sizeof(float *));
NR_ServingCellConfigCommon_t *scc = calloc_or_fail(1, sizeof(*scc));
prepare_scc(scc);
uint64_t ssb_bitmap;
fill_scc_sim(scc, &ssb_bitmap, N_RB_DL, N_RB_DL, mu, mu);
fix_scc(scc, ssb_bitmap);
frame_structure_t frame_structure = {0};
frame_type_t frame_type = TDD;
config_frame_structure(mu,
scc->tdd_UL_DL_ConfigurationCommon,
get_tdd_period_idx(scc->tdd_UL_DL_ConfigurationCommon),
frame_type,
&frame_structure);
AssertFatal(is_ul_slot(slot, &frame_structure), "The slot selected is not UL. Can't run ULSIM\n");
// TODO do a UECAP for phy-sim
const nr_mac_config_t conf = {.pdsch_AntennaPorts = {.N1 = 1, .N2 = 1, .XP = 1},
.pusch_AntennaPorts = n_rx,
.minRXTXTIME = 0,
.do_CSIRS = 0,
.do_SRS = 0,
.num_dlharq = 16,
.num_ulharq = 16,
.force_256qam_off = false,
.timer_config.sr_ProhibitTimer = 0,
.timer_config.sr_TransMax = 64,
.timer_config.sr_ProhibitTimer_v1700 = 0,
.timer_config.t300 = 400,
.timer_config.t301 = 400,
.timer_config.t310 = 2000,
.timer_config.n310 = 10,
.timer_config.t311 = 3000,
.timer_config.n311 = 1,
.timer_config.t319 = 400,
.spatial_stream_index = {0, 1, 2, 3, 4, 5, 6, 7}};
const nr_rlc_configuration_t rlc_config = {.srb =
{
.t_poll_retransmit = 45,
.t_reassembly = 35,
.t_status_prohibit = 0,
.poll_pdu = -1,
.poll_byte = -1,
.max_retx_threshold = 8,
.sn_field_length = 12,
},
.drb_am =
{
.t_poll_retransmit = 45,
.t_reassembly = 15,
.t_status_prohibit = 15,
.poll_pdu = 64,
.poll_byte = 1024 * 500,
.max_retx_threshold = 32,
.sn_field_length = 18,
},
.drb_um = {
.t_reassembly = 15,
.sn_field_length = 12,
}};
RC.nb_nr_macrlc_inst = 1;
mac_top_init_gNB(ngran_gNB, scc, &conf, &rlc_config);
RC.nrmac[0]->beam_info = (NR_beam_info_t){.beams_per_period = 1};
nr_mac_config_scc(RC.nrmac[0], scc, &conf);
NR_UE_NR_Capability_t *UE_Capability_nr = CALLOC(1, sizeof(NR_UE_NR_Capability_t));
prepare_sim_uecap(UE_Capability_nr, scc, mu, N_RB_UL, 0, mcs_table);
rnti_t rnti = 0x1234;
int uid = 0;
int ssb_index = 0;
NR_CellGroupConfig_t *secondaryCellGroup = get_default_secondaryCellGroup(scc, UE_Capability_nr, 0, 1, &conf, uid, ssb_index);
secondaryCellGroup->spCellConfig->reconfigurationWithSync = get_reconfiguration_with_sync(rnti, uid, scc, frame);
NR_BCCH_BCH_Message_t *mib = get_new_MIB_NR(scc);
// UE dedicated configuration
for (int u = 0; u < NUM_UE; u++) {
nr_mac_add_test_ue(RC.nrmac[0], n_rnti + u, secondaryCellGroup);
}
gNB->frame_parms.nb_antennas_tx = 1;
gNB->frame_parms.nb_antennas_rx = n_rx;
nfapi_nr_config_request_scf_t *cfg = &gNB->gNB_config;
cfg->carrier_config.num_tx_ant.value = 1;
cfg->carrier_config.num_rx_ant.value = n_rx;
gNB->chest_freq = chest_type[0];
gNB->chest_time = chest_type[1];
if (gNB->if_inst) {
gNB->if_inst->sl_ahead = 6;
}
phy_init_nr_gNB(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. */
for (i = 0; i < n_rx; i++)
gNB->common_vars.rxdataF[i] = malloc16_clear(gNB->frame_parms.samples_per_frame_wCP * sizeof(int32_t));
N_RB_DL = gNB->frame_parms.N_RB_DL;
/* no RU: need to have rxdata */
c16_t **rxdata;
rxdata = malloc_or_fail(n_rx * sizeof(*rxdata));
for (int i = 0; i < n_rx; ++i)
rxdata[i] = calloc_or_fail(gNB->frame_parms.samples_per_frame, sizeof(**rxdata));
NR_BWP_Uplink_t *ubwp =
secondaryCellGroup->spCellConfig->spCellConfigDedicated->uplinkConfig->uplinkBWP_ToAddModList->list.array[0];
// Configure channel model
for (int u = 0; u < NUM_UE; u++) {
UE2gNB[u] = new_channel_desc_scm(n_tx,
n_rx,
channel_model,
sampling_frequency / 1e6,
gNB->frame_parms.ul_CarrierFreq,
tx_bandwidth,
DS_TDL,
maxDoppler,
corr_level,
0,
delay,
0,
0);
if (UE2gNB[u] == NULL) {
printf("Problem generating channel model. Exiting.\n");
exit(-1);
}
}
const int num_samples_alloc = 153600;
printf("Pre-allocating padded host memory for the CPU channel pipeline...\n");
const int max_padding_alloc = 256 - 1;
size_t padded_tx_alloc_bytes = n_tx * (num_samples_alloc + max_padding_alloc) * 2 * sizeof(float);
h_tx_sig_pinned = malloc_or_fail(padded_tx_alloc_bytes);
if (h_tx_sig_pinned == NULL) {
printf("Error: Failed to allocate host buffer for CPU path\n");
exit(-1);
}
// Configure UE
NR_UE_MAC_INST_t *UE_mac[MAX_NUM_UE];
nrPHY_vars_UE_g = malloc_or_fail(NUM_UE * sizeof(PHY_VARS_NR_UE **));
for (int u = 0; u < NUM_UE; u++) {
nrPHY_vars_UE_g[u] = malloc_or_fail(sizeof(PHY_VARS_NR_UE *));
UE[u] = calloc_or_fail(1, sizeof(PHY_VARS_NR_UE));
nrPHY_vars_UE_g[u][0] = UE[u];
UE[u]->frame_parms = gNB->frame_parms;
UE[u]->frame_parms.nb_antennas_tx = n_tx;
UE[u]->frame_parms.nb_antennas_rx = 0;
UE[u]->nrLDPC_coding_interface = gNB->nrLDPC_coding_interface;
if (init_nr_ue_signal(UE[u], 1) != 0) {
printf("Error at UE NR initialisation\n");
exit(-1);
}
init_nr_ue_transport(UE[u]);
UE_mac[u] = nr_l2_init_ue(u, mu);
ue_init_config_request(UE_mac[u], get_slots_per_frame_from_scs(mu));
UE[u]->if_inst = nr_ue_if_module_init(u);
UE[u]->if_inst->scheduled_response = nr_ue_scheduled_response;
UE[u]->if_inst->phy_config_request = nr_ue_phy_config_request;
UE[u]->if_inst->dl_indication = nr_ue_dl_indication;
UE[u]->if_inst->ul_indication = nr_ue_ul_indication;
UE[u]->no_phase_pre_comp = no_phase_pre_comp;
UE_mac[u]->if_module = nr_ue_if_module_init(u);
nr_ue_phy_config_request(&UE_mac[u]->phy_config);
}
initFloatingCoresTpool(threadCnt, &nrUE_params.Tpool, false, "UE-tpool");
unsigned char harq_pid = 0;
NR_Sched_Rsp_t *Sched_INFO = malloc16_clear(sizeof(*Sched_INFO));
memset((void *)Sched_INFO, 0, sizeof(*Sched_INFO));
nfapi_nr_ul_tti_request_t *UL_tti_req = &Sched_INFO->UL_tti_req;
time_stats_t channel_stats = {0};
time_stats_t noise_stats = {0};
uint32_t errors_decoding = 0;
uint16_t pdu_bit_map = PUSCH_PDU_BITMAP_PUSCH_DATA;
unsigned char mod_order = nr_get_Qm_ul(Imcs, mcs_table);
uint16_t code_rate = nr_get_code_rate_ul(Imcs, mcs_table);
uint8_t mapping_type = typeB; // Default Values
pusch_dmrs_type_t dmrs_config_type = pusch_dmrs_type1; // Default Values
pusch_dmrs_AdditionalPosition_t add_pos = pusch_dmrs_pos0; // Default Values
/* validate parameters othwerwise default values are used */
/* -U flag can be used to set DMRS parameters*/
if (modify_dmrs) {
if (dmrs_arg[0] == 0)
mapping_type = typeA;
else if (dmrs_arg[0] == 1)
mapping_type = typeB;
/* Additional DMRS positions */
if (dmrs_arg[1] >= 0 && dmrs_arg[1] <= 3)
add_pos = dmrs_arg[1];
/* DMRS Conf Type 1 or 2 */
if (dmrs_arg[2] == 1)
dmrs_config_type = pusch_dmrs_type1;
else if (dmrs_arg[2] == 2)
dmrs_config_type = pusch_dmrs_type2;
num_dmrs_cdm_grps_no_data = dmrs_arg[3];
}
uint16_t l_prime_mask =
get_l_prime(nb_symb_sch, mapping_type, add_pos, length_dmrs, start_symbol, NR_MIB__dmrs_TypeA_Position_pos2);
int number_dmrs_symbols = count_bits64_with_mask(l_prime_mask, start_symbol, nb_symb_sch);
uint8_t nb_re_dmrs = (dmrs_config_type == pusch_dmrs_type1) ? 6 : 4;
uint32_t tbslbrm = 0;
if (ilbrm)
tbslbrm = nr_compute_tbslbrm(mcs_table, N_RB_UL, precod_nbr_layers);
if ((UE[0]->frame_parms.nb_antennas_tx == 4) && (precod_nbr_layers == 4))
num_dmrs_cdm_grps_no_data = 2;
if (transform_precoding == transformPrecoder_enabled) {
int index = get_index_for_dmrs_lowpapr_seq((NR_NB_SC_PER_RB / 2) * nb_rb);
AssertFatal(index >= 0,
"Num RBs not configured according to 3GPP 38.211 section 6.3.1.4. For PUSCH with transform precoding, num RBs "
"cannot be multiple of any other primenumber other than 2,3,5\n");
dmrs_config_type = pusch_dmrs_type1;
nb_re_dmrs = 6;
printf("[ULSIM]: TRANSFORM PRECODING ENABLED. Num RBs: %d, index for DMRS_SEQ: %d\n", nb_rb, index);
}
nb_re_dmrs = nb_re_dmrs * num_dmrs_cdm_grps_no_data;
unsigned int TBS =
nr_compute_tbs(mod_order, code_rate, nb_rb, nb_symb_sch, nb_re_dmrs * number_dmrs_symbols, 0, 0, precod_nbr_layers);
printf("[ULSIM]: length_dmrs: %u, l_prime_mask: %u number_dmrs_symbols: %u, mapping_type: %u add_pos: %d \n",
length_dmrs,
l_prime_mask,
number_dmrs_symbols,
mapping_type,
add_pos);
printf("[ULSIM]: CDM groups: %u, dmrs_config_type: %d, num_rbs: %u, nb_symb_sch: %u, start_symbol %u\n",
num_dmrs_cdm_grps_no_data,
dmrs_config_type,
nb_rb,
nb_symb_sch,
start_symbol);
printf("[ULSIM]: MCS: %d, mod order: %u, code_rate: %u\n", Imcs, mod_order, code_rate);
uint8_t ulsch_input_buffer[MAX_NUM_UE][TBS / 8];
for (int u = 0; u < NUM_UE; u++) {
ulsch_input_buffer[u][0] = 0x31;
for (i = 1; i < TBS / 8; i++) {
ulsch_input_buffer[u][i] = (uint8_t)rand();
}
}
double ts = 1.0 / (gNB->frame_parms.subcarrier_spacing * gNB->frame_parms.ofdm_symbol_size);
if (n_trials == 1)
max_rounds = 1;
printf("\n");
uint32_t unav_res = 0;
unsigned int available_bits =
nr_get_G(nb_rb, nb_symb_sch, nb_re_dmrs, number_dmrs_symbols, unav_res, mod_order, precod_nbr_layers);
uint8_t cw_buf[available_bits];
memset(cw_buf, 0, available_bits);
printf("[ULSIM]: VALUE OF G: %u, TBS: %u\n", available_bits, TBS);
int frame_length_complex_samples = gNB->frame_parms.samples_per_subframe * NR_NUMBER_OF_SUBFRAMES_PER_FRAME;
for (int u = 0; u < NUM_UE; u++) {
UE[u]->phy_sim_test_buf = calloc_or_fail(1, (available_bits + 7) / 8);
for (int aatx = 0; aatx < n_tx; aatx++) {
s_interleaved[u][aatx] = calloc_or_fail(1, frame_length_complex_samples * 2 * sizeof(float));
}
}
for (int aarx = 0; aarx < n_rx; aarx++) {
r_re[aarx] = calloc_or_fail(1, frame_length_complex_samples * sizeof(float));
r_im[aarx] = calloc_or_fail(1, frame_length_complex_samples * sizeof(float));
r_re_tmp[aarx] = calloc_or_fail(1, frame_length_complex_samples * sizeof(float));
r_im_tmp[aarx] = calloc_or_fail(1, frame_length_complex_samples * sizeof(float));
}
int slot_offset = get_samples_slot_timestamp(&gNB->frame_parms, slot);
int slot_length = slot_offset - get_samples_slot_timestamp(&gNB->frame_parms, slot - 1);
fapi_nr_ul_config_request_t ul_config[MAX_NUM_UE] = {0};
nr_phy_data_tx_t phy_data[MAX_NUM_UE] = {0};
UE_nr_rxtx_proc_t UE_proc[MAX_NUM_UE] = {0};
int ret = 1;
for (SNR = snr0; SNR <= snr1 && !stop; SNR += snr_step) {
varArray_t *table_rx = initVarArray(1000, sizeof(double));
reset_meas(&gNB->phy_proc_rx);
reset_meas(&gNB->rx_pusch_stats);
reset_meas(&gNB->rx_pusch_init_stats);
reset_meas(&gNB->rx_pusch_symbol_processing_stats);
reset_meas(&gNB->ulsch_decoding_stats);
reset_meas(&gNB->ts_deinterleave);
reset_meas(&gNB->ts_rate_unmatch);
reset_meas(&gNB->ts_ldpc_decode);
reset_meas(&gNB->ulsch_channel_estimation_stats);
reset_meas(&gNB->pusch_channel_estimation_antenna_processing_stats);
for (int u = 0; u < NUM_UE; u++)
init_nr_ue_phy_cpu_stats(&UE[u]->phy_cpu_stats);
uint32_t errors_scrambling[MAX_NUM_UE][16] = {0};
int n_errors[MAX_NUM_UE][16] = {0};
int round_trials[MAX_NUM_UE][16] = {0};
double blerStats[MAX_NUM_UE][16] = {0};
double berStats[MAX_NUM_UE][16] = {0};
uint64_t sum_pusch_delay[MAX_NUM_UE] = {0};
int min_pusch_delay[MAX_NUM_UE];
int max_pusch_delay[MAX_NUM_UE];
int delay_pusch_est_count[MAX_NUM_UE] = {0};
for (int u = 0; u < NUM_UE; u++) {
min_pusch_delay[u] = INT_MAX;
max_pusch_delay[u] = INT_MIN;
}
int n_false_positive[MAX_NUM_UE] = {0};
double effRate[MAX_NUM_UE] = {0};
double effTP[MAX_NUM_UE] = {0};
float roundStats[MAX_NUM_UE] = {0};
for (trial = 0; trial < n_trials && !stop; trial++) {
uint8_t round = 0;
int ue_crc_status[MAX_NUM_UE];
int ue_rounds[MAX_NUM_UE] = {0};
for (int u = 0; u < NUM_UE; u++) {
ue_crc_status[u] = 1;
}
while (round < max_rounds && !stop) {
int active_ues = 0;
for (int u = 0; u < NUM_UE; u++) {
if (ue_crc_status[u]) {
active_ues++;
ue_rounds[u]++;
}
}
if (active_ues == 0)
break;
rv_index = nr_get_rv(round % 4);
/// gNB UL PDUs
UL_tti_req->SFN = frame;
UL_tti_req->Slot = slot;
UL_tti_req->n_pdus = NUM_UE;
// Fill FAPI PUSCH groups
UL_tti_req->n_group = 1;
nfapi_nr_ul_tti_request_number_of_groups_t *group = &UL_tti_req->groups_list[0];
group->n_ue = NUM_UE;
for (int u = 0; u < NUM_UE; u++) {
if (ue_crc_status[u] == 1) {
round_trials[u][round]++;
}
group->ue_list[u].pdu_idx = u;
nfapi_nr_ul_tti_request_number_of_pdus_t *pdu_element0 = &UL_tti_req->pdus_list[u];
pdu_element0->pdu_type = NFAPI_NR_UL_CONFIG_PUSCH_PDU_TYPE;
pdu_element0->pdu_size = sizeof(nfapi_nr_pusch_pdu_t);
nfapi_nr_pusch_pdu_t *pusch_pdu = &pdu_element0->pusch_pdu;
memset(pusch_pdu, 0, sizeof(nfapi_nr_pusch_pdu_t));
int abwp_size = NRRIV2BW(ubwp->bwp_Common->genericParameters.locationAndBandwidth, 275);
int abwp_start = NRRIV2PRBOFFSET(ubwp->bwp_Common->genericParameters.locationAndBandwidth, 275);
pusch_pdu->bwp_start = abwp_start;
pusch_pdu->bwp_size = abwp_size;
pusch_pdu->pusch_data.tb_size = TBS >> 3;
pusch_pdu->pdu_bit_map = pdu_bit_map;
pusch_pdu->rnti = n_rnti + u;
pusch_pdu->mcs_index = Imcs;
pusch_pdu->mcs_table = mcs_table;
pusch_pdu->target_code_rate = code_rate;
pusch_pdu->qam_mod_order = mod_order;
pusch_pdu->transform_precoding = transform_precoding;
pusch_pdu->data_scrambling_id = *scc->physCellId;
pusch_pdu->nrOfLayers = precod_nbr_layers;
pusch_pdu->ul_dmrs_symb_pos = l_prime_mask;
pusch_pdu->dmrs_config_type = dmrs_config_type;
pusch_pdu->ul_dmrs_scrambling_id = *scc->physCellId;
pusch_pdu->scid = 0;
// Set orthogonal DMRS
pusch_pdu->dmrs_ports = ((1 << precod_nbr_layers) - 1) << (u * precod_nbr_layers);
pusch_pdu->num_dmrs_cdm_grps_no_data = num_dmrs_cdm_grps_no_data;
pusch_pdu->resource_alloc = 1;
pusch_pdu->rb_start = start_rb;
pusch_pdu->rb_size = nb_rb;
pusch_pdu->vrb_to_prb_mapping = 0;
pusch_pdu->frequency_hopping = 0;
pusch_pdu->uplink_frequency_shift_7p5khz = 0;
pusch_pdu->start_symbol_index = start_symbol;
pusch_pdu->nr_of_symbols = nb_symb_sch;
pusch_pdu->maintenance_parms_v3.tbSizeLbrmBytes = tbslbrm;
pusch_pdu->pusch_data.rv_index = rv_index;
pusch_pdu->pusch_data.harq_process_id = 0;
pusch_pdu->pusch_data.new_data_indicator = round == 0 ? true : false;
pusch_pdu->pusch_data.num_cb = 0;
pusch_pdu->maintenance_parms_v3.ldpcBaseGraph = get_BG(TBS, code_rate);
pusch_pdu->param_v4.numSpatialStreamIndices = conf.pusch_AntennaPorts;
memcpy(pusch_pdu->param_v4.spatialStreamIndices, conf.spatial_stream_index, sizeof(conf.spatial_stream_index));
// if transform precoding is enabled
if (transform_precoding == transformPrecoder_enabled) {
pusch_pdu->dfts_ofdm.low_papr_group_number = *scc->physCellId % 30; // U as defined in 38.211 section 6.4.1.1.1.2
pusch_pdu->dfts_ofdm.low_papr_sequence_number = 0; // V as defined in 38.211 section 6.4.1.1.1.2
pusch_pdu->num_dmrs_cdm_grps_no_data = num_dmrs_cdm_grps_no_data;
}
}
/* load FAPI into RX of L1 */
nr_save_ul_tti_req(gNB, &Sched_INFO->UL_tti_req);
for (int aarx = 0; aarx < n_rx; aarx++) {
memset(r_re[aarx], 0, frame_length_complex_samples * sizeof(float));
memset(r_im[aarx], 0, frame_length_complex_samples * sizeof(float));
}
double txlev_sum = 0;
for (int u = 0; u < NUM_UE; u++) {
UE[u]->ul_harq_processes[harq_pid].round = round;
UE_proc[u].nr_slot_tx = slot;
UE_proc[u].frame_tx = frame;
UE_proc[u].gNB_id = 0;
// --------- setting parameters for UE --------
nr_scheduled_response_t scheduled_response = {.module_id = u,
.ul_config = &ul_config[u],
.phy_data = (void *)&phy_data[u]};
ul_config[u].slot = slot;
ul_config[u].number_pdus = 1;
fapi_nr_ul_config_request_pdu_t *ul_config0 = &ul_config[u].ul_config_list[0];
ul_config0->pdu_type = FAPI_NR_UL_CONFIG_TYPE_PUSCH;
nfapi_nr_ue_pusch_pdu_t *pusch_config_pdu = &ul_config0->pusch_config_pdu;
// Config UL TX PDU
pusch_config_pdu->tx_request_body.fapiTxPdu = ulsch_input_buffer[u];
pusch_config_pdu->tx_request_body.pdu_length = TBS / 8;
pusch_config_pdu->rnti = n_rnti + u;
pusch_config_pdu->pdu_bit_map = pdu_bit_map;
pusch_config_pdu->qam_mod_order = mod_order;
pusch_config_pdu->rb_size = nb_rb;
pusch_config_pdu->rb_start = start_rb;
pusch_config_pdu->nr_of_symbols = nb_symb_sch;
pusch_config_pdu->start_symbol_index = start_symbol;
pusch_config_pdu->ul_dmrs_symb_pos = l_prime_mask;
pusch_config_pdu->dmrs_config_type = dmrs_config_type;
pusch_config_pdu->mcs_index = Imcs;
pusch_config_pdu->mcs_table = mcs_table;
pusch_config_pdu->num_dmrs_cdm_grps_no_data = num_dmrs_cdm_grps_no_data;
pusch_config_pdu->nrOfLayers = precod_nbr_layers;
// set orthognal DMRS ports
pusch_config_pdu->dmrs_ports = ((1 << precod_nbr_layers) - 1) << (u * precod_nbr_layers);
pusch_config_pdu->target_code_rate = code_rate;
pusch_config_pdu->tbslbrm = tbslbrm;
pusch_config_pdu->ldpcBaseGraph = get_BG(TBS, code_rate);
pusch_config_pdu->pusch_data.tb_size = TBS / 8;
pusch_config_pdu->pusch_data.new_data_indicator = round == 0 ? true : false;
pusch_config_pdu->pusch_data.rv_index = rv_index;
pusch_config_pdu->pusch_data.harq_process_id = harq_pid;
pusch_config_pdu->transform_precoding = transform_precoding;
// if transform precoding is enabled
if (transform_precoding == transformPrecoder_enabled) {
pusch_config_pdu->dfts_ofdm.low_papr_group_number = *scc->physCellId % 30; // U as defined in 38.211 section 6.4.1.1.1.2
pusch_config_pdu->dfts_ofdm.low_papr_sequence_number = 0; // V as defined in 38.211 section 6.4.1.1.1.2
// pusch_config_pdu->pdu_bit_map |= PUSCH_PDU_BITMAP_DFTS_OFDM;
pusch_config_pdu->num_dmrs_cdm_grps_no_data = num_dmrs_cdm_grps_no_data;
}
for (int i = 0; i < (TBS / 8); i++) {
UE[u]->ul_harq_processes[harq_pid].payload_AB[i] = ulsch_input_buffer[u][i];
}
// set FAPI parameters for UE, put them in the scheduled response and call
nr_ue_scheduled_response(&scheduled_response);
/////////////////////////phy_procedures_nr_ue_TX///////////////////////
///////////
int slot_start = get_samples_slot_timestamp(&UE[u]->frame_parms, slot);
c16_t *tx[UE[u]->frame_parms.nb_antennas_tx];
for (int i = 0; i < UE[u]->frame_parms.nb_antennas_tx; i++)
tx[i] = UE[u]->common_vars.txData[i] + slot_start;
phy_procedures_nrUE_TX(UE[u], &UE_proc[u], &phy_data[u], tx);
if (n_trials == 1) {
LOG_M("txsig0.m", "txs0", &UE[u]->common_vars.txData[0][slot_offset], slot_length, 1, 1 | log_format);
if (precod_nbr_layers > 1) {
LOG_M("txsig1.m", "txs1", &UE[u]->common_vars.txData[1][slot_offset], slot_length, 1, 1 | log_format);
if (precod_nbr_layers == 4) {
LOG_M("txsig2.m", "txs2", &UE[u]->common_vars.txData[2][slot_offset], slot_length, 1, 1 | log_format);
LOG_M("txsig3.m", "txs3", &UE[u]->common_vars.txData[3][slot_offset], slot_length, 1, 1 | log_format);
}
}
}
///////////
////////////////////////////////////////////////////
// Compute transmitter energy level
tx_offset = get_samples_slot_timestamp(&gNB->frame_parms, slot);
int symbol_offset = tx_offset + 5 * gNB->frame_parms.ofdm_symbol_size + 4 * gNB->frame_parms.nb_prefix_samples
+ gNB->frame_parms.nb_prefix_samples0;
int symbol_length = gNB->frame_parms.ofdm_symbol_size + gNB->frame_parms.nb_prefix_samples;
txlev[u] = compute_tx_energy_level(UE[u]->common_vars.txData,
UE[u]->frame_parms.nb_antennas_tx,
symbol_offset,
symbol_length,
n_trials);
txlev_sum += txlev[u];
for (int aa = 0; aa < UE[u]->frame_parms.nb_antennas_tx; aa++) {
for (i = 0; i < slot_length; i++) {
s_interleaved[u][aa][2 * i] = (float)UE[u]->common_vars.txData[aa][slot_offset + i].r;
s_interleaved[u][aa][2 * i + 1] = (float)UE[u]->common_vars.txData[aa][slot_offset + i].i;
}
}
const int padding_len = UE2gNB[u]->channel_length - 1;
const int padded_slot_length = slot_length + padding_len;
float *h_tx_ptr = (float *)h_tx_sig_pinned;
size_t total_padded_bytes_for_slot = n_tx * padded_slot_length * 2 * sizeof(float);
memset(h_tx_ptr, 0, total_padded_bytes_for_slot);
for (int j = 0; j < n_tx; j++) {
float *data_start_ptr = h_tx_ptr + (j * padded_slot_length + padding_len) * 2;
memcpy(data_start_ptr, s_interleaved[u][j], slot_length * 2 * sizeof(float));
}
float **tx_sig_for_cpu = malloc_or_fail(n_tx * sizeof(float *));
for (int j = 0; j < n_tx; j++) {
tx_sig_for_cpu[j] = h_tx_ptr + (j * padded_slot_length + padding_len) * 2;
}
for (int aarx = 0; aarx < n_rx; aarx++) {
memset(r_re_tmp[aarx], 0, frame_length_complex_samples * sizeof(float));
memset(r_im_tmp[aarx], 0, frame_length_complex_samples * sizeof(float));
}
start_meas(&channel_stats);
multipath_channel_float(UE2gNB[u], tx_sig_for_cpu, r_re_tmp, r_im_tmp, slot_length, 0, (n_trials == 1) ? 1 : 0);
// Add interference from multiple UEs
add_rx_signals_simde(r_re, r_im, r_re_tmp, r_im_tmp, n_rx, slot_length);
stop_meas(&channel_stats);
free(tx_sig_for_cpu);
}
sigma =
compute_noise_variance(txlev_sum, gNB->frame_parms.ofdm_symbol_size, nb_rb, NUM_UE * precod_nbr_layers, SNR, n_trials);
start_meas(&noise_stats);
add_noise_float(rxdata,
(const float **)r_re,
(const float **)r_im,
(float)sigma,
slot_length,
slot_offset,
ts,
delay,
false,
gNB->frame_parms.nb_antennas_rx);
stop_meas(&noise_stats);
//----------------------------------------------------------
//------------------- gNB phy procedures -------------------
//----------------------------------------------------------
UL_INFO.rx_ind.number_of_pdus = 0;
UL_INFO.crc_ind.number_crcs = 0;
//----------- OFDM Demodulation and RX rotation--------------------------
bool was_symbol_used[14] = {0};
int offset = (slot & 3) * gNB->frame_parms.symbols_per_slot * gNB->frame_parms.ofdm_symbol_size;
for (int i = 0; i < 14; i++) {
was_symbol_used[i] = true;
}
nr_ofdm_demod_and_rx_rotation(rxdata,
gNB->common_vars.rxdataF,
&gNB->frame_parms,
gNB->frame_parms.nb_antennas_rx,
slot,
offset,
link_type_ul,
was_symbol_used);
ul_proc_error = phy_procedures_gNB_uespec_RX(gNB, frame, slot, &UL_INFO);
if (n_trials == 1 && round == 0) {
LOG_M("rxsig0.m", "rx0", &rxdata[0][slot_offset], slot_length, 1, 1 | log_format);
LOG_M("rxsigF0.m", "rxsF0", gNB->common_vars.rxdataF[0], 14 * gNB->frame_parms.ofdm_symbol_size, 1, 1 | log_format);
if (precod_nbr_layers > 1) {
LOG_M("rxsig1.m", "rx1", &rxdata[1][slot_offset], slot_length, 1, 1);
LOG_M("rxsigF1.m", "rxsF1", gNB->common_vars.rxdataF[1], 14 * gNB->frame_parms.ofdm_symbol_size, 1, 1 | log_format);
if (precod_nbr_layers == 4) {
LOG_M("rxsig2.m", "rx2", &rxdata[2][slot_offset], slot_length, 1, 1);
LOG_M("rxsig3.m", "rx3", &rxdata[3][slot_offset], slot_length, 1, 1);
LOG_M("rxsigF2.m", "rxsF2", gNB->common_vars.rxdataF[2], 14 * gNB->frame_parms.ofdm_symbol_size, 1, 1 | log_format);
LOG_M("rxsigF3.m", "rxsF3", gNB->common_vars.rxdataF[3], 14 * gNB->frame_parms.ofdm_symbol_size, 1, 1 | log_format);
}
}
}
for (int u = 0; u < NUM_UE; u++) {
NR_gNB_PUSCH *pusch_vars = &gNB->pusch_vars[u];
nfapi_nr_ul_tti_request_number_of_pdus_t *pdu_element0 = &UL_tti_req->pdus_list[u];
nfapi_nr_pusch_pdu_t *pusch_pdu = &pdu_element0->pusch_pdu;
if (n_trials == 1 && round == 0) {
__attribute__((unused)) int off = ((nb_rb & 1) == 1) ? 4 : 0;
LOG_M("chestF0.m",
"chF0",
&pusch_vars->ul_ch_estimates[0][start_symbol * gNB->frame_parms.ofdm_symbol_size],
gNB->frame_parms.ofdm_symbol_size,
1,
1 | log_format);
LOG_M("rxsigF0_comp.m",
"rxsF0_comp",
&pusch_vars->rxdataF_comp[0][start_symbol * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
nb_symb_sch * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1 | log_format);
if (precod_nbr_layers == 2) {
LOG_M("chestF3.m",
"chF3",
&pusch_vars->ul_ch_estimates[3][start_symbol * gNB->frame_parms.ofdm_symbol_size],
gNB->frame_parms.ofdm_symbol_size,
1,
1 | log_format);
LOG_M("rxsigF2_comp.m",
"rxsF2_comp",
&pusch_vars->rxdataF_comp[2][start_symbol * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
nb_symb_sch * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1 | log_format);
}
if (precod_nbr_layers == 4) {
LOG_M("chestF5.m",
"chF5",
&pusch_vars->ul_ch_estimates[5][start_symbol * gNB->frame_parms.ofdm_symbol_size],
gNB->frame_parms.ofdm_symbol_size,
1,
1 | log_format);
LOG_M("chestF10.m",
"chF10",
&pusch_vars->ul_ch_estimates[10][start_symbol * gNB->frame_parms.ofdm_symbol_size],
gNB->frame_parms.ofdm_symbol_size,
1,
1 | log_format);
LOG_M("chestF15.m",
"chF15",
&pusch_vars->ul_ch_estimates[15][start_symbol * gNB->frame_parms.ofdm_symbol_size],
gNB->frame_parms.ofdm_symbol_size,
1,
1 | log_format);
LOG_M("rxsigF4_comp.m",
"rxsF4_comp",
&pusch_vars->rxdataF_comp[4][start_symbol * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
nb_symb_sch * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1 | log_format);
LOG_M("rxsigF8_comp.m",
"rxsF8_comp",
&pusch_vars->rxdataF_comp[8][start_symbol * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
nb_symb_sch * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1 | log_format);
LOG_M("rxsigF12_comp.m",
"rxsF12_comp",
&pusch_vars->rxdataF_comp[12][start_symbol * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size))],
nb_symb_sch * (off + (NR_NB_SC_PER_RB * pusch_pdu->rb_size)),
1,
1 | log_format);
}
LOG_M("rxsigF0_llr.m",
"rxsF0_llr",
&pusch_vars->llr[0],
precod_nbr_layers * (nb_symb_sch - 1) * NR_NB_SC_PER_RB * pusch_pdu->rb_size * mod_order,
1,
0 | log_format);
}
//----------------------------------------------------------
//----------------- count and print errors -----------------
//----------------------------------------------------------
NR_gNB_ULSCH_t *ulsch_gNB = &gNB->ulsch[u];
if (ue_crc_status[u] == 1) {
if ((ulsch_gNB->last_iteration_cnt >= ulsch_gNB->max_ldpc_iterations) || ul_proc_error > 0) {
n_errors[u][round]++;
}
for (i = 0; i < available_bits; i++) {
const uint8_t current_bit = (UE[u]->ul_harq_processes[harq_pid].f[i / 8] >> (i & 7)) & 1;
if (((current_bit == 0) && (pusch_vars->llr[i] <= 0)) || ((current_bit == 1) && (pusch_vars->llr[i] >= 0))) {
errors_scrambling[u][round]++;
}
}
}
if (ue_crc_status[u] == 1) {
sum_pusch_delay[u] += pusch_vars->delay.est_delay;
min_pusch_delay[u] = min(pusch_vars->delay.est_delay, min_pusch_delay[u]);
max_pusch_delay[u] = max(pusch_vars->delay.est_delay, max_pusch_delay[u]);
delay_pusch_est_count[u]++;
if ((ulsch_gNB->last_iteration_cnt >= ulsch_gNB->max_ldpc_iterations) || ul_proc_error > 0) {
ue_crc_status[u] = 1;
} else {
ue_crc_status[u] = 0;
}
}
}
if (n_trials == 1) {
printf("end of round %d rv_index %d\n", round, rv_index);
}
round++;
} // round
for (int u = 0; u < NUM_UE; u++) {
int ue_final_error_flag = ue_crc_status[u];
if (n_trials == 1 && errors_scrambling[u][0] > 0) {
printf(
"\x1B[31m"
"[UE %d][frame %d][trial %d]\tnumber of errors in unscrambling = %u\n"
"\x1B[0m",
u,
frame,
trial,
errors_scrambling[u][0]);
}
errors_decoding = 0;
for (i = 0; i < TBS; i++) {
uint8_t estimated_output_bit = (gNB->ulsch[u].harq_process->b[i / 8] & (1 << (i & 7))) >> (i & 7);
uint8_t test_input_bit = (UE[u]->ul_harq_processes[harq_pid].payload_AB[i / 8] & (1 << (i & 7))) >> (i & 7);
if (estimated_output_bit != test_input_bit) {
errors_decoding++;
}
}
if (errors_decoding > 0 && ue_final_error_flag == 0) {
n_false_positive[u]++;
if (n_trials == 1)
printf(
"\x1B[31m"
"[UE %d][frame %d][trial %d]\tnumber of errors in decoding = %u\n"
"\x1B[0m",
u,
frame,
trial,
errors_decoding);
}
roundStats[u] += ((float)ue_rounds[u]);
if (!ue_final_error_flag)
effRate[u] += ((double)TBS) / (double)ue_rounds[u];
}
} // trial loop
int ues_passed = 0;
for (int u = 0; u < NUM_UE; u++) {
roundStats[u] /= ((float)n_trials);
effRate[u] /= (double)n_trials;
// -------csv file-------
// adding values into file
printf("*****************************************\n");
printf("[UE %d] SNR %f: n_errors (%d/%d", u, SNR, n_errors[u][0], round_trials[u][0]);
for (int r = 1; r < max_rounds; r++)
printf(",%d/%d", n_errors[u][r], round_trials[u][r]);
printf(") (negative CRC), false_positive %d/%d, errors_scrambling (%u/%u",
n_false_positive[u],
n_trials,
errors_scrambling[u][0],
available_bits * round_trials[u][0]);
for (int r = 1; r < max_rounds; r++)
printf(",%u/%u", errors_scrambling[u][r], available_bits * round_trials[u][r]);
printf(")\n");
printf("\n");
for (int r = 0; r < max_rounds; r++) {
if (round_trials[u][r] > 0) {
blerStats[u][r] = (double)n_errors[u][r] / round_trials[u][r];
berStats[u][r] = (double)errors_scrambling[u][r] / available_bits / round_trials[u][r];
} else {
blerStats[u][r] = 0.0;
berStats[u][r] = 0.0;
}
}
effTP[u] = effRate[u] / (double)TBS * (double)100;
printf("SNR %f: Channel BLER (%e", SNR, blerStats[u][0]);
for (int r = 1; r < max_rounds; r++)
printf(",%e", blerStats[u][r]);
printf(" Channel BER (%e", berStats[u][0]);
for (int r = 1; r < max_rounds; r++)
printf(",%e", berStats[u][r]);
printf(") Avg round %.2f, Eff Rate %.4f bits/slot, Eff Throughput %.2f, TBS %u bits/slot\n",
roundStats[u],
effRate[u],
effTP[u],
TBS);
if (delay_pusch_est_count[u] > 0) {
double av_delay = (double)sum_pusch_delay[u] / (2 * delay_pusch_est_count[u]);
printf("DMRS-PUSCH delay estimation: min %i, max %i, average %2.1f\n",
min_pusch_delay[u] >> 1,
max_pusch_delay[u] >> 1,
av_delay);
}
printf("*****************************************\n");
printf("\n");
if ((float)effTP[u] >= eff_tp_check) {
ues_passed++;
}
}
FILE *fd = fopen("nr_ulsim.log", "w");
if (fd == NULL) {
printf("Problem with filename %s\n", "nr_ulsim.log");
exit(-1);
}
dump_pusch_stats(fd, gNB);
fclose(fd);
if (print_perf == 1) {
printf("UE TX\n");
for (int u = 0; u < NUM_UE; u++) {
for (int i = PHY_PROC_TX; i <= OFDM_MOD_STATS; i++) {
printStatIndent(&UE[u]->phy_cpu_stats.cpu_time_stats[i], UE[u]->phy_cpu_stats.cpu_time_stats[i].meas_name);
}
}
printf("\ngNB RX\n");
printDistribution(&gNB->phy_proc_rx, table_rx, "Total PHY proc rx");
printStatIndent(&gNB->rx_pusch_stats, "RX PUSCH time");
printStatIndent2(&gNB->ulsch_channel_estimation_stats, "ULSCH channel estimation time");
printStatIndent3(&gNB->pusch_channel_estimation_antenna_processing_stats, "Antenna Processing time");
printStatIndent2(&gNB->rx_pusch_init_stats, "RX PUSCH Initialization time");
printStatIndent2(&gNB->rx_pusch_symbol_processing_stats, "RX PUSCH Symbol Processing time");
gNB->pusch_extraction_stats.trials = gNB->rx_pusch_symbol_processing_stats.trials;
printStatIndent3(&gNB->pusch_extraction_stats, "RX PUSCH extraction");
gNB->pusch_channel_compensation_stats.trials = gNB->rx_pusch_symbol_processing_stats.trials;
printStatIndent3(&gNB->pusch_channel_compensation_stats, "RX PUSCH channel compensation");
gNB->ulsch_llr_stats.trials = gNB->rx_pusch_symbol_processing_stats.trials;
printStatIndent3(&gNB->ulsch_llr_stats, "RX PUSCH LLR");
gNB->ulsch_layer_demapping_and_unscrambling_stats.trials = gNB->rx_pusch_symbol_processing_stats.trials;
printStatIndent3(&gNB->ulsch_layer_demapping_and_unscrambling_stats, "RX PUSCH layer demapping and unscrambling");
printStatIndent(&gNB->ulsch_decoding_stats, "ULSCH total decoding time");
gNB->ts_deinterleave.trials = n_trials;
printStatIndent2(&gNB->ts_deinterleave, "ULSCH segment deinterleaving time");
gNB->ts_rate_unmatch.trials = n_trials;
printStatIndent2(&gNB->ts_rate_unmatch, "ULSCH segment rate matching time");
gNB->ts_ldpc_decode.trials = n_trials;
printStatIndent2(&gNB->ts_ldpc_decode, "ULSCH segments decoding time");
printStatIndent(&channel_stats, "Multipath Channel (CPU)");
printStatIndent(&noise_stats, "Add Noise (CPU)");
printf("\n");
}
freeVarArray(table_rx);
if (n_trials == 1)
break;
if (ues_passed == NUM_UE) {
printf("*************\n");
printf("PUSCH test OK\n");
printf("*************\n");
ret = 0;
break;
}
} // SNR loop
printf("\n");
printf(
"Num RB:\t%d\n"
"Num symbols:\t%d\n"
"MCS:\t%d\n"
"DMRS config type:\t%d\n"
"DMRS add pos:\t%d\n"
"PUSCH mapping type:\t%d\n"
"DMRS length:\t%d\n"
"DMRS CDM gr w/o data:\t%d\n",
nb_rb,
nb_symb_sch,
Imcs,
dmrs_config_type,
add_pos,
mapping_type,
length_dmrs,
num_dmrs_cdm_grps_no_data);
free_MIB_NR(mib);
free_nrLDPC_coding_interface(&gNB->nrLDPC_coding_interface);
for (int u = 0; u < NUM_UE; u++) {
free_and_zero(UE[u]->phy_sim_test_buf);
for (int aatx = 0; aatx < n_tx; aatx++) {
free_and_zero(s_interleaved[u][aatx]);
}
free_and_zero(s_interleaved[u]);
}
free_and_zero(s_interleaved);
for (int aarx = 0; aarx < n_rx; aarx++) {
free_and_zero(r_re[aarx]);
free_and_zero(r_im[aarx]);
free_and_zero(r_re_tmp[aarx]);
free_and_zero(r_im_tmp[aarx]);
}
free_and_zero(r_re);
free_and_zero(r_im);
free_and_zero(r_re_tmp);
free_and_zero(r_im_tmp);
for (int u = 0; u < NUM_UE; u++) {
free_channel_desc_scm(UE2gNB[u]);
}
for (int i = 0; i < n_rx; ++i) {
free_and_zero(rxdata[i]);
}
free_and_zero(rxdata);
for (int u = 0; u < NUM_UE; u++) {
free_and_zero(UE[u]);
free_and_zero(nrPHY_vars_UE_g[u]);
}
free_and_zero(nrPHY_vars_UE_g);
free_and_zero(h_tx_sig_pinned);
return ret;
}
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