[ulschsim] Initial version (copy of dlschsim)

cmake_targets/CMakeLists.txt

@@ -2557,6 +2557,9 @@ add_executable(nr_dlsim
   ${T_SOURCE})   
 target_link_libraries(nr_dlsim  -Wl,--start-group UTIL SIMU PHY_COMMON PHY_NR PHY_NR_UE SCHED_NR_LIB SCHED_NR_UE_LIB MAC_NR MAC_UE_NR RRC_LIB NR_RRC_LIB CONFIG_LIB L2_NR -Wl,--end-group m pthread ${ATLAS_LIBRARIES} ${T_LIB} dl)
 
+add_executable(nr_ulschsim  ${OPENAIR1_DIR}/SIMULATION/NR_PHY/ulschsim.c ${T_SOURCE})
+target_link_libraries(nr_ulschsim -Wl,--start-group UTIL SIMU PHY_COMMON PHY_NR PHY_NR_UE SCHED_NR_LIB CONFIG_LIB -Wl,--end-group m pthread ${ATLAS_LIBRARIES} ${T_LIB} dl)
+
 
 foreach(myExe dlsim dlsim_tm7 ulsim pbchsim scansim mbmssim pdcchsim pucchsim prachsim syncsim)
   

cmake_targets/build_oai

@@ -691,7 +691,7 @@ function main() {
     echo_info "Compiling unitary tests simulators"
     # TODO: fix: dlsim_tm4 pucchsim prachsim pdcchsim pbchsim mbmssim
     #simlist="dlsim_tm4 dlsim ulsim pucchsim prachsim pdcchsim pbchsim mbmssim"
-    simlist="dlsim ulsim polartest ldpctest nr_pbchsim nr_dlschsim nr_dlsim"
+    simlist="dlsim ulsim polartest ldpctest nr_pbchsim nr_dlschsim nr_dlsim nr_ulschsim"
     for f in $simlist ; do
       compilations \
       phy_simulators $f \

openair1/SIMULATION/NR_PHY/ulschsim.c

+/*
+ * 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 <string.h>
+#include <math.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+
+#include "common/config/config_userapi.h"
+#include "common/utils/LOG/log.h"
+#include "common/ran_context.h"
+
+#include "SIMULATION/TOOLS/sim.h"
+#include "SIMULATION/RF/rf.h"
+#include "PHY/types.h"
+#include "PHY/defs_nr_common.h"
+#include "PHY/defs_nr_UE.h"
+#include "PHY/defs_gNB.h"
+#include "PHY/INIT/phy_init.h"
+#include "PHY/NR_REFSIG/refsig_defs_ue.h"
+#include "PHY/NR_REFSIG/nr_mod_table.h"
+#include "PHY/MODULATION/modulation_eNB.h"
+#include "PHY/MODULATION/modulation_UE.h"
+#include "PHY/NR_TRANSPORT/nr_transport.h"
+#include "PHY/NR_TRANSPORT/nr_dlsch.h"
+#include "PHY/NR_UE_TRANSPORT/nr_transport_proto_ue.h"
+
+#include "SCHED_NR/sched_nr.h"
+
+//#include "PHY/MODULATION/modulation_common.h"
+//#include "common/config/config_load_configmodule.h"
+//#include "UTIL/LISTS/list.h"
+//#include "common/ran_context.h"
+
+//#define DEBUG_DLSCHSIM
+
+PHY_VARS_gNB *gNB;
+PHY_VARS_NR_UE *UE;
+RAN_CONTEXT_t RC;
+
+double cpuf;
+
+// dummy functions
+int nfapi_mode = 0;
+int oai_nfapi_hi_dci0_req(nfapi_hi_dci0_request_t *hi_dci0_req) {
+	return (0);
+}
+int oai_nfapi_tx_req(nfapi_tx_request_t *tx_req) {
+	return (0);
+}
+
+int oai_nfapi_dl_config_req(nfapi_dl_config_request_t *dl_config_req) {
+	return (0);
+}
+
+int oai_nfapi_ul_config_req(nfapi_ul_config_request_t *ul_config_req) {
+	return (0);
+}
+
+int oai_nfapi_nr_dl_config_req(nfapi_nr_dl_config_request_t *dl_config_req) {
+	return (0);
+}
+
+uint32_t from_nrarfcn(int nr_bandP, uint32_t dl_earfcn) {
+	return (0);
+}
+int32_t get_uldl_offset(int eutra_bandP) {
+	return (0);
+}
+
+NR_IF_Module_t *
+NR_IF_Module_init(int Mod_id) {
+	return (NULL);
+}
+
+void exit_function(const char *file, const char *function, const int line,
+		const char *s) {
+	const char *msg = s == NULL ? "no comment" : s;
+	printf("Exiting at: %s:%d %s(), %s\n", file, line, function, msg);
+	exit(-1);
+}
+
+// needed for some functions
+PHY_VARS_NR_UE *PHY_vars_UE_g[1][1] = { { NULL } };
+uint16_t n_rnti = 0x1234;
+
+char quantize(double D, double x, unsigned char B) {
+	double qxd;
+	short maxlev;
+	qxd = floor(x / D);
+	maxlev = 1 << (B - 1); //(char)(pow(2,B-1));
+
+	//printf("x=%f,qxd=%f,maxlev=%d\n",x,qxd, maxlev);
+
+	if (qxd <= -maxlev)
+		qxd = -maxlev;
+	else if (qxd >= maxlev)
+		qxd = maxlev - 1;
+
+	return ((char) qxd);
+}
+
+int main(int argc, char **argv) {
+	char c;
+	int i; //,j,l,aa;
+	double SNR, SNR_lin, snr0 = -2.0, snr1 = 2.0;
+	double snr_step = 0.1;
+	uint8_t snr1set = 0;
+	int **txdata;
+	double **s_re, **s_im, **r_re, **r_im;
+	//  int sync_pos, sync_pos_slot;
+	//  FILE *rx_frame_file;
+	FILE *output_fd = NULL;
+	uint8_t write_output_file = 0;
+	//  int subframe_offset;
+	//  char fname[40], vname[40];
+	int trial, n_trials = 1, n_errors = 0, n_false_positive = 0;
+	uint8_t transmission_mode = 1, n_tx = 1, n_rx = 1;
+	uint16_t Nid_cell = 0;
+	channel_desc_t *gNB2UE;
+	uint8_t extended_prefix_flag = 0;
+	int8_t interf1 = -21, interf2 = -21;
+	FILE *input_fd = NULL, *pbch_file_fd = NULL;
+	//char input_val_str[50],input_val_str2[50];
+	//uint16_t NB_RB=25;
+	SCM_t channel_model = AWGN;  //Rayleigh1_anticorr;
+	uint16_t N_RB_DL = 106, mu = 1;
+	unsigned char frame_type = 0;
+	unsigned char pbch_phase = 0;
+	int frame = 0, subframe = 0;
+	int frame_length_complex_samples;
+	//int frame_length_complex_samples_no_prefix;
+	NR_DL_FRAME_PARMS *frame_parms;
+	//nfapi_nr_config_request_t *gNB_config;
+	uint8_t Kmimo = 0;
+	uint32_t Nsoft = 0;
+	double sigma;
+	unsigned char qbits = 8;
+	int ret;
+	//int run_initial_sync=0;
+	int loglvl = OAILOG_WARNING;
+	float target_error_rate = 0.01;
+
+	uint16_t nb_symb_sch = 12;
+	uint16_t nb_rb = 50;
+	uint8_t Imcs = 9;
+
+	cpuf = get_cpu_freq_GHz();
+
+	if (load_configmodule(argc, argv) == 0) {
+		exit_fun("[SOFTMODEM] Error, configuration module init failed\n");
+	}
+
+	//logInit();
+	randominit(0);
+
+	while ((c = getopt(argc, argv, "df:hpg:i:j:n:l:m:r:s:S:y:z:N:F:R:P:")) != -1) {
+		switch (c) {
+		case 'f':
+			write_output_file = 1;
+			output_fd = fopen(optarg, "w");
+
+			if (output_fd == NULL) {
+				printf("Error opening %s\n", optarg);
+				exit(-1);
+			}
+
+			break;
+
+		case 'd':
+			frame_type = 1;
+			break;
+
+		case 'g':
+			switch ((char) *optarg) {
+			case 'A':
+				channel_model = SCM_A;
+				break;
+
+			case 'B':
+				channel_model = SCM_B;
+				break;
+
+			case 'C':
+				channel_model = SCM_C;
+				break;
+
+			case 'D':
+				channel_model = SCM_D;
+				break;
+
+			case 'E':
+				channel_model = EPA;
+				break;
+
+			case 'F':
+				channel_model = EVA;
+				break;
+
+			case 'G':
+				channel_model = ETU;
+				break;
+
+			default:
+				msg("Unsupported channel model!\n");
+				exit(-1);
+			}
+
+			break;
+
+		case 'i':
+			interf1 = atoi(optarg);
+			break;
+
+		case 'j':
+			interf2 = atoi(optarg);
+			break;
+
+		case 'n':
+			n_trials = atoi(optarg);
+			break;
+
+		case 's':
+			snr0 = atof(optarg);
+			msg("Setting SNR0 to %f\n", snr0);
+			break;
+
+		case 'S':
+			snr1 = atof(optarg);
+			snr1set = 1;
+			msg("Setting SNR1 to %f\n", snr1);
+			break;
+
+		case 'p':
+			extended_prefix_flag = 1;
+			break;
+
+			/*
+			 case 'r':
+			 ricean_factor = pow(10,-.1*atof(optarg));
+			 if (ricean_factor>1) {
+			 printf("Ricean factor must be between 0 and 1\n");
+			 exit(-1);
+			 }
+			 break;
+			 */
+
+		case 'y':
+			n_tx = atoi(optarg);
+
+			if ((n_tx == 0) || (n_tx > 2)) {
+				msg("Unsupported number of tx antennas %d\n", n_tx);
+				exit(-1);
+			}
+
+			break;
+
+		case 'z':
+			n_rx = atoi(optarg);
+
+			if ((n_rx == 0) || (n_rx > 2)) {
+				msg("Unsupported number of rx antennas %d\n", n_rx);
+				exit(-1);
+			}
+
+			break;
+
+		case 'N':
+			Nid_cell = atoi(optarg);
+			break;
+
+		case 'R':
+			N_RB_DL = atoi(optarg);
+			break;
+
+		case 'F':
+			input_fd = fopen(optarg, "r");
+
+			if (input_fd == NULL) {
+				printf("Problem with filename %s\n", optarg);
+				exit(-1);
+			}
+
+			break;
+
+		case 'P':
+			pbch_phase = atoi(optarg);
+
+			if (pbch_phase > 3)
+				printf("Illegal PBCH phase (0-3) got %d\n", pbch_phase);
+
+			break;
+
+		case 'm':
+			Imcs = atoi(optarg);
+			break;
+
+		case 'l':
+			nb_symb_sch = atoi(optarg);
+			break;
+
+		case 'r':
+			nb_rb = atoi(optarg);
+			break;
+
+		case 'x':
+			transmission_mode = atoi(optarg);
+			break;
+
+		default:
+		case 'h':
+			printf("%s -h(elp) -p(extended_prefix) -N cell_id -f output_filename -F input_filename -g channel_model -n n_frames -t Delayspread -s snr0 -S snr1 -x transmission_mode -y TXant -z RXant -i Intefrence0 -j Interference1 -A interpolation_file -C(alibration offset dB) -N CellId\n", argv[0]);
+			printf("-h This message\n");
+			printf("-p Use extended prefix mode\n");
+			printf("-d Use TDD\n");
+			printf("-n Number of frames to simulate\n");
+			printf("-s Starting SNR, runs from SNR0 to SNR0 + 5 dB.  If n_frames is 1 then just SNR is simulated\n");
+			printf("-S Ending SNR, runs from SNR0 to SNR1\n");
+			printf("-t Delay spread for multipath channel\n");
+			printf("-g [A,B,C,D,E,F,G] Use 3GPP SCM (A,B,C,D) or 36-101 (E-EPA,F-EVA,G-ETU) models (ignores delay spread and Ricean factor)\n");
+			printf("-x Transmission mode (1,2,6 for the moment)\n");
+			printf("-y Number of TX antennas used in eNB\n");
+			printf("-z Number of RX antennas used in UE\n");
+			printf("-i Relative strength of first intefering eNB (in dB) - cell_id mod 3 = 1\n");
+			printf("-j Relative strength of second intefering eNB (in dB) - cell_id mod 3 = 2\n");
+			printf("-N Nid_cell\n");
+			printf("-R N_RB_DL\n");
+			printf("-O oversampling factor (1,2,4,8,16)\n");
+			printf("-A Interpolation_filname Run with Abstraction to generate Scatter plot using interpolation polynomial in file\n");
+			//    printf("-C Generate Calibration information for Abstraction (effective SNR adjustment to remove Pe bias w.r.t. AWGN)\n");
+			printf("-f Output filename (.txt format) for Pe/SNR results\n");
+			printf("-F Input filename (.txt format) for RX conformance testing\n");
+			exit(-1);
+			break;
+		}
+	}
+
+	logInit();
+	set_glog(loglvl);
+	T_stdout = 1;
+
+	if (snr1set == 0)
+		snr1 = snr0 + 10;
+
+	gNB2UE = new_channel_desc_scm(n_tx, n_rx, channel_model, 
+				      61.44e6, //N_RB2sampling_rate(N_RB_DL),
+				      40e6, //N_RB2channel_bandwidth(N_RB_DL),
+				      0, 0, 0);
+
+	if (gNB2UE == NULL) {
+		msg("Problem generating channel model. Exiting.\n");
+		exit(-1);
+	}
+
+	RC.gNB = (PHY_VARS_gNB ** *) malloc(sizeof(PHY_VARS_gNB **));
+	RC.gNB[0] = (PHY_VARS_gNB **) malloc(sizeof(PHY_VARS_gNB *));
+	RC.gNB[0][0] = malloc(sizeof(PHY_VARS_gNB));
+	gNB = RC.gNB[0][0];
+	//gNB_config = &gNB->gNB_config;
+	frame_parms = &gNB->frame_parms; //to be initialized I suppose (maybe not necessary for PBCH)
+	frame_parms->nb_antennas_tx = n_tx;
+	frame_parms->nb_antennas_rx = n_rx;
+	frame_parms->N_RB_DL = N_RB_DL;
+	frame_parms->Ncp = extended_prefix_flag ? EXTENDED : NORMAL;
+	crcTableInit();
+	nr_phy_config_request_sim(gNB, N_RB_DL, N_RB_DL, mu, Nid_cell);
+	phy_init_nr_gNB(gNB, 0, 0);
+	//init_eNB_afterRU();
+	frame_length_complex_samples = frame_parms->samples_per_subframe;
+	//frame_length_complex_samples_no_prefix = frame_parms->samples_per_subframe_wCP;
+	s_re = malloc(2 * sizeof(double *));
+	s_im = malloc(2 * sizeof(double *));
+	r_re = malloc(2 * sizeof(double *));
+	r_im = malloc(2 * sizeof(double *));
+	txdata = malloc(2 * sizeof(int *));
+
+	for (i = 0; i < 2; i++) {
+		s_re[i] = malloc(frame_length_complex_samples * sizeof(double));
+		bzero(s_re[i], frame_length_complex_samples * sizeof(double));
+		s_im[i] = malloc(frame_length_complex_samples * sizeof(double));
+		bzero(s_im[i], frame_length_complex_samples * sizeof(double));
+		r_re[i] = malloc(frame_length_complex_samples * sizeof(double));
+		bzero(r_re[i], frame_length_complex_samples * sizeof(double));
+		r_im[i] = malloc(frame_length_complex_samples * sizeof(double));
+		bzero(r_im[i], frame_length_complex_samples * sizeof(double));
+		txdata[i] = malloc(frame_length_complex_samples * sizeof(int));
+		bzero(r_re[i], frame_length_complex_samples * sizeof(int));
+	}
+
+	if (pbch_file_fd != NULL) {
+		load_pbch_desc(pbch_file_fd);
+	}
+
+	/*  for (int k=0; k<2; k++) {
+	 // Create transport channel structures for 2 transport blocks (MIMO)
+	 for (i=0; i<2; i++) {
+	 gNB->dlsch[k][i] = new_gNB_dlsch(Kmimo,8,Nsoft,0,frame_parms,gNB_config);
+
+	 if (!gNB->dlsch[k][i]) {
+	 printf("Can't get eNB dlsch structures\n");
+	 exit(-1);
+	 }
+	 gNB->dlsch[k][i]->Nsoft = 10;
+	 gNB->dlsch[k][i]->rnti = n_rnti+k;
+	 }
+	 }*/
+	//configure UE
+	UE = malloc(sizeof(PHY_VARS_NR_UE));
+	memcpy(&UE->frame_parms, frame_parms, sizeof(NR_DL_FRAME_PARMS));
+
+	//phy_init_nr_top(frame_parms);
+	if (init_nr_ue_signal(UE, 1, 0) != 0) {
+		printf("Error at UE NR initialisation\n");
+		exit(-1);
+	}
+
+	//nr_init_frame_parms_ue(&UE->frame_parms);
+	//init_nr_ue_transport(UE, 0);
+	for (int sf = 0; sf < 2; sf++) {
+		for (i = 0; i < 2; i++) {
+			UE->dlsch[sf][0][i] = new_nr_ue_dlsch(Kmimo, 8, Nsoft, 5, N_RB_DL,
+					0);
+
+			if (!UE->dlsch[sf][0][i]) {
+				printf("Can't get ue dlsch structures\n");
+				exit(-1);
+			}
+
+			UE->dlsch[sf][0][i]->rnti = n_rnti;
+		}
+	}
+
+	UE->dlsch_SI[0] = new_nr_ue_dlsch(1, 1, Nsoft, 5, N_RB_DL, 0);
+	UE->dlsch_ra[0] = new_nr_ue_dlsch(1, 1, Nsoft, 5, N_RB_DL, 0);
+	unsigned char harq_pid = 0; //dlsch->harq_ids[subframe];
+	NR_gNB_DLSCH_t *dlsch = gNB->dlsch[0][0];
+	nfapi_nr_dl_config_dlsch_pdu_rel15_t *rel15 = &dlsch->harq_processes[harq_pid]->dlsch_pdu.dlsch_pdu_rel15;
+	//time_stats_t *rm_stats, *te_stats, *i_stats;
+	uint8_t is_crnti = 0, llr8_flag = 0;
+	unsigned int TBS = 8424;
+	unsigned int available_bits;
+	uint8_t nb_re_dmrs = 6;
+	uint16_t length_dmrs = 1;
+	unsigned char mod_order;
+	uint8_t Nl = 1;
+	uint8_t rvidx = 0;
+	dlsch->rnti = 1;
+	/*dlsch->harq_processes[0]->mcs = Imcs;
+	 dlsch->harq_processes[0]->rvidx = rvidx;*/
+	//printf("dlschsim harqid %d nb_rb %d, mscs %d\n",dlsch->harq_ids[subframe],
+	//    dlsch->harq_processes[0]->nb_rb,dlsch->harq_processes[0]->mcs,dlsch->harq_processes[0]->Nl);
+	mod_order = nr_get_Qm(Imcs, 1);
+	available_bits = nr_get_G(nb_rb, nb_symb_sch, nb_re_dmrs, length_dmrs, mod_order, 1);
+	TBS = nr_compute_tbs(Imcs, nb_rb, nb_symb_sch, nb_re_dmrs, length_dmrs, Nl);
+	printf("available bits %d TBS %d mod_order %d\n", available_bits, TBS, mod_order);
+	//dlsch->harq_ids[subframe]= 0;
+	rel15->n_prb = nb_rb;
+	rel15->nb_symbols = nb_symb_sch;
+	rel15->modulation_order = mod_order;
+	rel15->nb_layers = Nl;
+	rel15->nb_re_dmrs = nb_re_dmrs;
+	rel15->transport_block_size = TBS;
+	double *modulated_input = malloc16(sizeof(double) * 16 * 68 * 384);
+	short *channel_output_fixed = malloc16(sizeof(short) * 16 * 68 * 384);
+	short *channel_output_uncoded = malloc16(sizeof(unsigned short) * 16 * 68 * 384);
+	double errors_bit_uncoded = 0;
+	unsigned char *estimated_output;
+	unsigned char *estimated_output_bit;
+	unsigned char *test_input_bit;
+	unsigned int errors_bit = 0;
+	test_input_bit = (unsigned char *) malloc16(sizeof(unsigned char) * 16 * 68 * 384);
+	estimated_output = (unsigned char *) malloc16(sizeof(unsigned char) * 16 * 68 * 384);
+	estimated_output_bit = (unsigned char *) malloc16(sizeof(unsigned char) * 16 * 68 * 384);
+	NR_UE_DLSCH_t *dlsch0_ue = UE->dlsch[0][0][0];
+	NR_DL_UE_HARQ_t *harq_process = dlsch0_ue->harq_processes[harq_pid];
+	harq_process->mcs = Imcs;
+	harq_process->Nl = Nl;
+	harq_process->nb_rb = nb_rb;
+	harq_process->Qm = mod_order;
+	harq_process->rvidx = rvidx;
+	printf("harq process ue mcs = %d Qm = %d, symb %d\n", harq_process->mcs, harq_process->Qm, nb_symb_sch);
+	unsigned char *test_input;
+	test_input = (unsigned char *) malloc16(sizeof(unsigned char) * TBS / 8);
+
+	for (i = 0; i < TBS / 8; i++)
+		test_input[i] = (unsigned char) rand();
+
+	estimated_output = harq_process->b;
+
+#ifdef DEBUG_DLSCHSIM
+	for (i = 0; i < TBS / 8; i++) printf("test_input[i]=%d \n",test_input[i]);
+#endif
+
+	/*for (int i=0; i<TBS/8; i++)
+	 printf("test input[%d]=%d \n",i,test_input[i]);*/
+
+	//printf("crc32: [0]->0x%08x\n",crc24c(test_input, 32));
+	// generate signal
+	if (input_fd == NULL) {
+		nr_dlsch_encoding(test_input, subframe, dlsch, frame_parms);
+	}
+
+	for (SNR = snr0; SNR < snr1; SNR += snr_step) {
+		n_errors = 0;
+		n_false_positive = 0;
+
+		for (trial = 0; trial < n_trials; trial++) {
+			errors_bit_uncoded = 0;
+			for (i = 0; i < available_bits; i++) {
+#ifdef DEBUG_CODER
+				if ((i&0xf)==0)
+				printf("\ne %d..%d:    ",i,i+15);
+#endif
+
+				//if (i<16)
+				//   printf("encoder output f[%d] = %d\n",i,dlsch->harq_processes[0]->f[i]);
+				if (dlsch->harq_processes[0]->f[i] == 0)
+					modulated_input[i] = 1.0;        ///sqrt(2);  //QPSK
+				else
+					modulated_input[i] = -1.0;        ///sqrt(2);
+
+				//if (i<16) printf("modulated_input[%d] = %d\n",i,modulated_input[i]);
+				//SNR =10;
+				SNR_lin = pow(10, SNR / 10.0);
+				sigma = 1.0 / sqrt(2 * SNR_lin);
+				channel_output_fixed[i] = (short) quantize(sigma / 4.0 / 4.0,
+						modulated_input[i] + sigma * gaussdouble(0.0, 1.0),
+						qbits);
+				//channel_output_fixed[i] = (char)quantize8bit(sigma/4.0,(2.0*modulated_input[i]) - 1.0 + sigma*gaussdouble(0.0,1.0));
+				//printf("llr[%d]=%d\n",i,channel_output_fixed[i]);
+				//printf("channel_output_fixed[%d]: %d\n",i,channel_output_fixed[i]);
+
+				//channel_output_fixed[i] = (char)quantize(1,channel_output_fixed[i],qbits);
+
+				//if (i<16)   printf("channel_output_fixed[%d] = %d\n",i,channel_output_fixed[i]);
+
+				//Uncoded BER
+				if (channel_output_fixed[i] < 0)
+					channel_output_uncoded[i] = 1;  //QPSK demod
+				else
+					channel_output_uncoded[i] = 0;
+
+				if (channel_output_uncoded[i] != dlsch->harq_processes[harq_pid]->f[i])
+					errors_bit_uncoded = errors_bit_uncoded + 1;
+			}
+
+			//if (errors_bit_uncoded>10)
+			//printf("errors bits uncoded %f\n", errors_bit_uncoded);
+#ifdef DEBUG_CODER
+			printf("\n");
+			exit(-1);
+#endif
+			ret = nr_dlsch_decoding(UE, channel_output_fixed, &UE->frame_parms,
+					dlsch0_ue, dlsch0_ue->harq_processes[0], frame, nb_symb_sch,
+					subframe, harq_pid, is_crnti, llr8_flag);
+
+			if (ret > dlsch0_ue->max_ldpc_iterations)
+				n_errors++;
+
+			//count errors
+			errors_bit = 0;
+
+			for (i = 0; i < TBS; i++) {
+				estimated_output_bit[i] = (dlsch0_ue->harq_processes[0]->b[i / 8] & (1 << (i & 7))) >> (i & 7);
+				test_input_bit[i] = (test_input[i / 8] & (1 << (i & 7))) >> (i & 7); // Further correct for multiple segments
+
+				if (estimated_output_bit[i] != test_input_bit[i]) {
+					errors_bit++;
+					//printf("estimated bits error occurs @%d ",i);
+				}
+			}
+
+			if (errors_bit > 0) {
+				n_false_positive++;
+				if (n_trials == 1)
+					printf("errors_bit %d (trial %d)\n", errors_bit, trial);
+			}
+		}
+
+		printf("SNR %f, BLER %f (false positive %f)\n", SNR,
+				(float) n_errors / (float) n_trials,
+				(float) n_false_positive / (float) n_trials);
+
+		if ((float) n_errors / (float) n_trials < target_error_rate) {
+		  printf("PDSCH test OK\n");
+		  break;
+		}
+	}
+
+	/*LOG_M("txsigF0.m","txsF0", gNB->common_vars.txdataF[0],frame_length_complex_samples_no_prefix,1,1);
+	 if (gNB->frame_parms.nb_antennas_tx>1)
+	 LOG_M("txsigF1.m","txsF1", gNB->common_vars.txdataF[1],frame_length_complex_samples_no_prefix,1,1);*/
+
+	//TODO: loop over slots
+	/*for (aa=0; aa<gNB->frame_parms.nb_antennas_tx; aa++) {
+	 if (gNB_config->subframe_config.dl_cyclic_prefix_type.value == 1) {
+	 PHY_ofdm_mod(gNB->common_vars.txdataF[aa],
+	 txdata[aa],
+	 frame_parms->ofdm_symbol_size,
+	 12,
+	 frame_parms->nb_prefix_samples,
+	 CYCLIC_PREFIX);
+	 } else {
+	 nr_normal_prefix_mod(gNB->common_vars.txdataF[aa],
+	 txdata[aa],
+	 14,
+	 frame_parms);
+	 }
+	 }
+
+	 LOG_M("txsig0.m","txs0", txdata[0],frame_length_complex_samples,1,1);
+	 if (gNB->frame_parms.nb_antennas_tx>1)
+	 LOG_M("txsig1.m","txs1", txdata[1],frame_length_complex_samples,1,1);
+
+
+	 for (i=0; i<frame_length_complex_samples; i++) {
+	 for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
+	 r_re[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)]);
+	 r_im[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)+1]);
+	 }
+	 }*/
+
+	for (i = 0; i < 2; i++) {
+		printf("gNB %d\n", i);
+		free_gNB_dlsch(gNB->dlsch[0][i]);
+		printf("UE %d\n", i);
+		free_nr_ue_dlsch(UE->dlsch[0][0][i]);
+	}
+
+	for (i = 0; i < 2; i++) {
+		free(s_re[i]);
+		free(s_im[i]);
+		free(r_re[i]);
+		free(r_im[i]);
+		free(txdata[i]);
+	}
+
+	free(s_re);
+	free(s_im);
+	free(r_re);
+	free(r_im);
+	free(txdata);
+
+	if (output_fd)
+		fclose(output_fd);
+
+	if (input_fd)
+		fclose(input_fd);
+
+	return (n_errors);
+}
+