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adding OFDM modulation

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This commit is contained in:
Florian Kaltenberger
2018-09-20 02:37:36 -07:00
parent df18f5933a
commit 0c66eb8120
5 changed files with 84 additions and 66 deletions
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cmake_targets/CMakeLists.txt
+1 -1
View File
@@ -2525,7 +2525,7 @@ add_executable(ldpctest ${OPENAIR1_DIR}/PHY/CODING/TESTBENCH/ldpctest.c)
target_link_libraries(ldpctest SIMU PHY PHY_NR m ${ATLAS_LIBRARIES})
add_executable(nr_pbchsim ${OPENAIR1_DIR}/SIMULATION/NR_PHY/pbchsim.c )
target_link_libraries(nr_pbchsim -Wl,--start-group UTIL SIMU PHY PHY_COMMON PHY_NR SCHED_NR_LIB ${CONFIG_LIBRARIES} -Wl,--end-group m pthread dl ${ATLAS_LIBRARIES})
target_link_libraries(nr_pbchsim -Wl,--start-group UTIL SIMU PHY PHY_COMMON PHY_NR PHY_NR_UE SCHED_NR_LIB ${CONFIG_LIBRARIES} -Wl,--end-group m pthread dl ${ATLAS_LIBRARIES})
foreach(myExe dlsim dlsim_tm7 ulsim pbchsim scansim mbmssim pdcchsim pucchsim prachsim syncsim)
openair1/PHY/INIT/nr_init.c
+1 -1
View File
@@ -92,7 +92,7 @@ int phy_init_nr_gNB(PHY_VARS_gNB *gNB,
int i, UE_id;
LOG_I(PHY,"[gNB %d] %s() About to wait for gNB to be configured", gNB->Mod_id, __FUNCTION__);
LOG_I(PHY,"[gNB %d] %s() About to wait for gNB to be configured\n", gNB->Mod_id, __FUNCTION__);
gNB->total_dlsch_bitrate = 0;
gNB->total_transmitted_bits = 0;
openair1/PHY/MODULATION/modulation_common.h
+2
View File
@@ -22,6 +22,7 @@
#ifndef __MODULATION_COMMON__H__
#define __MODULATION_COMMON__H__
#include "PHY/defs_common.h"
#include "PHY/defs_nr_common.h"
/** @addtogroup _PHY_MODULATION_
* @{
*/
@@ -48,6 +49,7 @@ void PHY_ofdm_mod(int *input,
void normal_prefix_mod(int32_t *txdataF,int32_t *txdata,uint8_t nsymb,LTE_DL_FRAME_PARMS *frame_parms);
void nr_normal_prefix_mod(int32_t *txdataF,int32_t *txdata,uint8_t nsymb,NR_DL_FRAME_PARMS *frame_parms);
void do_OFDM_mod(int32_t **txdataF, int32_t **txdata, uint32_t frame,uint16_t next_slot, LTE_DL_FRAME_PARMS *frame_parms);
openair1/PHY/NR_REFSIG/nr_dmrs_rx.c
+1 -1
View File
@@ -41,7 +41,7 @@
#include "refsig_defs_ue.h"
#include "PHY/defs_nr_UE.h"
#include "nr_mod_table.h"
//#include "nr_mod_table.h"
#include "log.h"
/*Table 7.4.1.1.2-1/2 from 38.211 */
openair1/SIMULATION/NR_PHY/pbchsim.c
+79 -63
View File
@@ -36,6 +36,8 @@
#include "PHY/INIT/phy_init.h"
#include "SCHED_NR/sched_nr.h"
#include "PHY/MODULATION/modulation_common.h"
#include "common/ran_context.h"
PHY_VARS_gNB *gNB;
@@ -63,16 +65,19 @@ NR_IF_Module_t *NR_IF_Module_init(int Mod_id){return(NULL);}
void exit_fun(const char *s) { exit(-1); }
// needed for some functions
PHY_VARS_NR_UE * PHY_vars_UE_g[1][1]={NULL};
int main(int argc, char **argv)
{
char c;
int i,l,aa;
double sigma2, sigma2_dB=0,SNR,snr0=-2.0,snr1;
double sigma2, sigma2_dB=10,SNR,snr0=-2.0,snr1=2.0;
uint8_t snr1set=0;
int **txdata,**txdata1,**txdata2;
double **s_re,**s_im,**s_re1,**s_im1,**s_re2,**s_im2,**r_re,**r_im,**r_re1,**r_im1,**r_re2,**r_im2;
int **txdata;
double **s_re,**s_im,**r_re,**r_im;
double iqim = 0.0;
unsigned char pbch_pdu[6];
// int sync_pos, sync_pos_slot;
@@ -83,11 +88,10 @@ int main(int argc, char **argv)
int freq_offset;
// int subframe_offset;
// char fname[40], vname[40];
int trial, n_trials, ntrials=1, n_errors,n_errors2,n_alamouti;
int trial,n_trials=1,n_errors,n_errors2,n_alamouti;
uint8_t transmission_mode = 1,n_tx=1,n_rx=1;
uint16_t Nid_cell=0;
int n_frames=1;
channel_desc_t *gNB2UE;
uint32_t nsymb,tx_lev,tx_lev1 = 0,tx_lev2 = 0;
uint8_t extended_prefix_flag=0;
@@ -95,15 +99,12 @@ int main(int argc, char **argv)
FILE *input_fd=NULL,*pbch_file_fd=NULL;
char input_val_str[50],input_val_str2[50];
// double input_val1,input_val2;
// uint16_t amask=0;
uint8_t frame_mod4,num_pdcch_symbols = 0;
uint16_t NB_RB=25;
SCM_t channel_model=AWGN;//Rayleigh1_anticorr;
//DCI_ALLOC_t dci_alloc[8];
uint8_t abstraction_flag=0;//,calibration_flag=0;
double pbch_sinr;
int pbch_tx_ant;
uint8_t N_RB_DL=106,mu=1;
@@ -115,7 +116,8 @@ int main(int argc, char **argv)
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;
cpuf = get_cpu_freq_GHz();
if ( load_configmodule(argc,argv) == 0) {
@@ -123,6 +125,7 @@ int main(int argc, char **argv)
}
logInit();
randominit(0);
while ((c = getopt (argc, argv, "f:hA:pf:g:i:j:n:s:S:t:x:y:z:N:F:GR:dP:")) != -1) {
switch (c) {
@@ -187,7 +190,7 @@ int main(int argc, char **argv)
break;
case 'n':
n_frames = atoi(optarg);
n_trials = atoi(optarg);
break;
case 's':
@@ -251,23 +254,6 @@ int main(int argc, char **argv)
break;
case 'A':
abstraction_flag=1;
ntrials=10000;
msg("Running Abstraction test\n");
pbch_file_fd=fopen(optarg,"r");
if (pbch_file_fd==NULL) {
printf("Problem with filename %s\n",optarg);
exit(-1);
}
break;
// case 'C':
// calibration_flag=1;
// msg("Running Abstraction calibration for Bias removal\n");
// break;
case 'N':
Nid_cell = atoi(optarg);
break;
@@ -323,19 +309,6 @@ int main(int argc, char **argv)
}
}
s_re = malloc(2*sizeof(double*));
s_im = malloc(2*sizeof(double*));
s_re1 = malloc(2*sizeof(double*));
s_im1 = malloc(2*sizeof(double*));
s_re2 = malloc(2*sizeof(double*));
s_im2 = malloc(2*sizeof(double*));
r_re = malloc(2*sizeof(double*));
r_im = malloc(2*sizeof(double*));
r_re1 = malloc(2*sizeof(double*));
r_im1 = malloc(2*sizeof(double*));
r_re2 = malloc(2*sizeof(double*));
r_im2 = malloc(2*sizeof(double*));
gNB2UE = new_channel_desc_scm(n_tx,
n_rx,
channel_model,
@@ -354,15 +327,24 @@ int main(int argc, char **argv)
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;
//NR_PHY_Config_t *phy_config = malloc(sizeof(NR_PHY_Config_t));
nr_phy_config_request_sim(gNB);
phy_init_nr_gNB(gNB,0,0);
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));
@@ -374,34 +356,65 @@ int main(int argc, char **argv)
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);
}
//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);
}
// generate signal
if (input_fd==NULL) {
nr_common_signal_procedures (gNB,frame,subframe);
}
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);
// multipath channel
/*
for (i=0; i<frame_length_complex_samples; i++) {
for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
s_re[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)]);
s_im[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)+1]);
r_re[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)]);
r_im[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)+1]);
}
}
*/
for (SNR=snr0; SNR<snr1; SNR+=.2) {
@@ -411,21 +424,12 @@ int main(int argc, char **argv)
for (trial=0; trial<n_trials; trial++) {
multipath_channel(gNB2UE,s_re,s_im,r_re,r_im,frame_length_complex_samples,0);
sigma2_dB = 10*log10((double)tx_lev) +10*log10((double)gNB->frame_parms.ofdm_symbol_size/(double)(12*NB_RB)) - SNR;
if (n_frames==1)
printf("sigma2_dB %f (SNR %f dB) tx_lev_dB %f,%f,%f\n",sigma2_dB,SNR,
10*log10((double)tx_lev),
10*log10((double)tx_lev1),
10*log10((double)tx_lev2));
// multipath channel
//multipath_channel(gNB2UE,s_re,s_im,r_re,r_im,frame_length_complex_samples,0);
//AWGN
sigma2_dB = SNR;
sigma2 = pow(10,sigma2_dB/10);
//printf("n_trial %d\n",n_trials);
for (i=0; i<frame_length_complex_samples; i++) {
for (aa=0; aa<frame_parms->nb_antennas_rx; aa++) {
@@ -433,9 +437,20 @@ int main(int argc, char **argv)
((short*) UE->common_vars.rxdata[aa])[2*i+1] = (short) ((r_im[aa][i] + (iqim*r_re[aa][i]) + sqrt(sigma2/2)*gaussdouble(0.0,1.0)));
}
}
if (n_trials==1) {
LOG_M("rxsig0.m","rxs0", UE->common_vars.rxdata[0],frame_length_complex_samples,1,1);
if (gNB->frame_parms.nb_antennas_tx>1)
LOG_M("rxsig1.m","rxs1", UE->common_vars.rxdata[1],frame_length_complex_samples,1,1);
}
} //noise trials
printf("SNR %f : n_errors = %d/%d\n", SNR,n_errors,n_trials);
if (n_trials==1)
break;
} // NSR
for (i=0; i<2; i++) {
@@ -443,13 +458,14 @@ int main(int argc, char **argv)
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 (write_output_file)
fclose(output_fd);