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openairinterface5g/openair1/SIMULATION/TOOLS/channel_sim.c
T
Robert Schmidt 3b7d6377a0 Link targets that need RRC ASN.1 headers to header-only library 
Most targets don't need the symbols from the compiled RRC ASN.1
libraries, but only the headers. In particular when compiling individual
libraries (e.g., for tests), linking the full library makes the RRC
ASN.1 libraries compile and link, when they are not needed (only headers
are needed).

For libraries that can do without these headers, don't link them.
2023-03-06 20:05:38 +01:00

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/*
* 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 <stdint.h>
#include <stdio.h>
#include <time.h>
#include "SIMULATION/TOOLS/sim.h"
#include "SIMULATION/RF/rf.h"
#include "PHY/types.h"
#include "PHY/defs_eNB.h"
#include "PHY/phy_extern.h"
#include "PHY/phy_extern_ue.h"
#include "common/utils/LOG/log.h"
#include "PHY_INTERFACE/phy_interface_extern.h"
#include "UTIL/OCG/OCG.h"
#include "UTIL/OPT/opt.h" // to test OPT
#include "common/ran_context.h"
#define RF
//#define DEBUG_SIM 1
void do_DL_sig(sim_t *sim,
uint16_t subframe,
uint32_t offset,
uint32_t length,
uint8_t abstraction_flag,
LTE_DL_FRAME_PARMS *ue_frame_parms,
uint8_t UE_id,
int CC_id)
{
int32_t **txdata,**rxdata;
uint32_t ru_id=0;
double tx_pwr;
double rx_pwr;
int32_t rx_pwr2;
uint32_t i,aa;
uint32_t sf_offset;
uint8_t hold_channel=0;
uint8_t nb_antennas_rx = sim->RU2UE[0][0][CC_id]->nb_rx; // number of rx antennas at UE
uint8_t nb_antennas_tx = sim->RU2UE[0][0][CC_id]->nb_tx; // number of tx antennas at eNB
double s_re0[30720];
double s_re1[30720];
double *s_re[NB_ANTENNAS_TX];
double s_im0[30720];
double s_im1[30720];
double *s_im[NB_ANTENNAS_TX];
double r_re00[30720];
double r_re01[30720];
double *r_re0[NB_ANTENNAS_RX];
double r_im00[30720];
double r_im01[30720];
double *r_im0[NB_ANTENNAS_RX];
LTE_DL_FRAME_PARMS *frame_parms;
s_re[0] = s_re0;
s_im[0] = s_im0;
s_re[1] = s_re1;
s_im[1] = s_im1;
r_re0[0] = r_re00;
r_im0[0] = r_im00;
r_re0[1] = r_re01;
r_im0[1] = r_im01;
if (subframe==0)
hold_channel = 0;
else
hold_channel = 1;
pthread_mutex_lock(&sim->RU_output_mutex[UE_id]);
if (sim->RU_output_mask[UE_id] == 0) { // This is the first eNodeB for this UE, clear the buffer
for (aa=0; aa<nb_antennas_rx; aa++) {
memset((void*)sim->r_re_DL[UE_id][aa],0,(RC.ru[0]->frame_parms->samples_per_tti)*sizeof(double));
memset((void*)sim->r_im_DL[UE_id][aa],0,(RC.ru[0]->frame_parms->samples_per_tti)*sizeof(double));
}
}
pthread_mutex_unlock(&sim->RU_output_mutex[UE_id]);
for (ru_id=0; ru_id<RC.nb_RU; ru_id++) {
txdata = RC.ru[ru_id]->common.txdata;
frame_parms = RC.ru[ru_id]->frame_parms;
// sf_offset = (subframe*frame_parms->samples_per_tti) + offset;
sf_offset = (subframe*frame_parms->samples_per_tti);
for (int aid=0;aid<RC.ru[ru_id]->nb_tx;aid++)
LOG_D(OCM,">>>>>>>>>>>>>>>>>TXPATH: RU %d : DL_sig reading TX%d for subframe %d (sf_offset %d, length %d) from %p\n",ru_id,aid,subframe,sf_offset,length,txdata[0]+sf_offset);
int length_meas = frame_parms->ofdm_symbol_size;
if (sf_offset+length <= frame_parms->samples_per_tti*10) {
tx_pwr = dac_fixed_gain(s_re,
s_im,
txdata,
sf_offset+offset,
nb_antennas_tx,
length,
sf_offset,
length_meas,
14,
frame_parms->pdsch_config_common.referenceSignalPower, // dBm/RE
0,
&sim->ru_amp[ru_id],
frame_parms->N_RB_DL*12);
}
else {
tx_pwr = dac_fixed_gain(s_re,
s_im,
txdata,
sf_offset,
nb_antennas_tx,
(frame_parms->samples_per_tti*10)-sf_offset,
sf_offset,
length_meas,
14,
frame_parms->pdsch_config_common.referenceSignalPower, // dBm/RE
0,
&sim->ru_amp[ru_id],
frame_parms->N_RB_DL*12);
tx_pwr = dac_fixed_gain(s_re,
s_im,
txdata,
sf_offset,
nb_antennas_tx,
length+sf_offset-(frame_parms->samples_per_tti*10),
sf_offset,
length_meas,
14,
frame_parms->pdsch_config_common.referenceSignalPower, // dBm/RE
0,
&sim->ru_amp[ru_id],
frame_parms->N_RB_DL*12);
}
#ifdef DEBUG_SIM
for (int aid=0;aid<RC.ru[ru_id]->nb_tx;aid++)
LOG_D(OCM,"[SIM][DL] subframe %d: txp%d (time) %d dB\n",
subframe,aid,dB_fixed(signal_energy(&txdata[aid][sf_offset],length_meas)));
LOG_D(OCM,"[SIM][DL] RU %d (CCid %d): tx_pwr %.1f dBm/RE (target %d dBm/RE), for subframe %d\n",
ru_id,CC_id,
10*log10(tx_pwr),
frame_parms->pdsch_config_common.referenceSignalPower,
subframe);
#endif
tx_pwr = signal_energy_fp(s_re,s_im,nb_antennas_tx,
length<length_meas?length:length_meas,
0)/(12.0*frame_parms->N_RB_DL);
//RU2UE[eNB_id][UE_id]->path_loss_dB = 0;
multipath_channel(sim->RU2UE[ru_id][UE_id][CC_id],s_re,s_im,r_re0,r_im0,
length,hold_channel,0);
#ifdef DEBUG_SIM
rx_pwr = signal_energy_fp2(sim->RU2UE[ru_id][UE_id][CC_id]->ch[0],
sim->RU2UE[ru_id][UE_id][CC_id]->channel_length)*sim->RU2UE[ru_id][UE_id][CC_id]->channel_length;
LOG_D(OCM,"[SIM][DL] Channel RU %d => UE %d (CCid %d): Channel gain %f dB (%f)\n",ru_id,UE_id,CC_id,10*log10(rx_pwr),rx_pwr);
#endif
#ifdef DEBUG_SIM
for (i=0; i<sim->RU2UE[ru_id][UE_id][CC_id]->channel_length; i++)
LOG_D(OCM,"channel(%d,%d)[%d] : (%f,%f)\n",ru_id,UE_id,i,sim->RU2UE[ru_id][UE_id][CC_id]->ch[0][i].x,sim->RU2UE[ru_id][UE_id][CC_id]->ch[0][i].y);
#endif
LOG_D(OCM,"[SIM][DL] Channel RU %d => UE %d (CCid %d): tx_power %.1f dBm/RE, path_loss %1.f dB\n",
ru_id,UE_id,CC_id,
(double)frame_parms->pdsch_config_common.referenceSignalPower,
sim->RU2UE[ru_id][UE_id][CC_id]->path_loss_dB);
#ifdef DEBUG_SIM
rx_pwr = signal_energy_fp(r_re0,r_im0,nb_antennas_rx,
length<length_meas?length:length_meas,
0)/(12.0*frame_parms->N_RB_DL);
LOG_D(OCM,"[SIM][DL] UE %d : rx_pwr %f dBm/RE (%f dBm RSSI,tx %f dB)for subframe %d (length %d)\n",UE_id,
10*log10(rx_pwr),
10*log10(rx_pwr*(double)frame_parms->N_RB_DL*12),
10*log10(tx_pwr),subframe,
length<length_meas?length:length_meas);
LOG_D(OCM,"[SIM][DL] UE %d : rx_pwr (noise) -132 dBm/RE (N0fs = %.1f dBm, N0B = %.1f dBm) for subframe %d\n",
UE_id,
10*log10(sim->RU2UE[ru_id][UE_id][CC_id]->sampling_rate*1e6)-174,
10*log10(sim->RU2UE[ru_id][UE_id][CC_id]->sampling_rate*1e6*12*frame_parms->N_RB_DL/(double)frame_parms->ofdm_symbol_size)-174,
subframe);
#endif
if (sim->RU2UE[ru_id][UE_id][CC_id]->first_run == 1)
sim->RU2UE[ru_id][UE_id][CC_id]->first_run = 0;
// RF model
#ifdef DEBUG_SIM
LOG_D(OCM,"[SIM][DL] UE %d (CCid %d): rx_gain %d dB (-ADC %f) for subframe %d\n",UE_id,CC_id,PHY_vars_UE_g[UE_id][CC_id]->rx_total_gain_dB,
PHY_vars_UE_g[UE_id][CC_id]->rx_total_gain_dB-66.227,subframe);
#endif
rf_rx_simple(r_re0,
r_im0,
nb_antennas_rx,
length,
1e3/sim->RU2UE[ru_id][UE_id][CC_id]->sampling_rate, // sampling time (ns)
(double)PHY_vars_UE_g[UE_id][CC_id]->rx_total_gain_dB - 66.227); // rx_gain (dB) (66.227 = 20*log10(pow2(11)) = gain from the adc that will be applied later)
#ifdef DEBUG_SIM
rx_pwr = signal_energy_fp(r_re0,r_im0,
nb_antennas_rx,
length<length_meas?length:length_meas,
0)/(12.0*frame_parms->N_RB_DL);
LOG_D(OCM,"[SIM][DL] UE %d : ADC in (RU %d) %f dBm/RE for subframe %d\n",
UE_id,ru_id,
10*log10(rx_pwr),subframe);
#endif
pthread_mutex_lock(&sim->RU_output_mutex[UE_id]);
for (i=0; i<frame_parms->samples_per_tti; i++) {
for (aa=0; aa<nb_antennas_rx; aa++) {
sim->r_re_DL[UE_id][aa][i]+=r_re0[aa][i];
sim->r_im_DL[UE_id][aa][i]+=r_im0[aa][i];
}
}
sim->RU_output_mask[UE_id] |= (1<<ru_id);
if (sim->RU_output_mask[UE_id] == (1<<RC.nb_RU)-1) {
sim->RU_output_mask[UE_id]=0;
double *r_re_p[2] = {sim->r_re_DL[UE_id][0],sim->r_re_DL[UE_id][1]};
double *r_im_p[2] = {sim->r_im_DL[UE_id][0],sim->r_im_DL[UE_id][1]};
#ifdef DEBUG_SIM
rx_pwr = signal_energy_fp(r_re_p,r_im_p,nb_antennas_rx,length<length_meas?length:length_meas,0)/(12.0*frame_parms->N_RB_DL);
LOG_D(OCM,"[SIM][DL] UE %d : ADC in %f dBm/RE for subframe %d\n",UE_id,10*log10(rx_pwr),subframe);
#endif
rxdata = PHY_vars_UE_g[UE_id][CC_id]->common_vars.rxdata;
sf_offset = (subframe*frame_parms->samples_per_tti)+offset;
adc(r_re_p,
r_im_p,
0,
sf_offset,
rxdata,
nb_antennas_rx,
length,
12);
#ifdef DEBUG_SIM
rx_pwr2 = signal_energy(rxdata[0]+sf_offset,length<length_meas?length:length_meas)/(12.0*frame_parms->N_RB_DL);
LOG_D(OCM,"[SIM][DL] UE %d : rx_pwr (ADC out) %f dB/RE (%d) for subframe %d, writing to %p, length %d\n",UE_id, 10*log10((double)rx_pwr2),rx_pwr2,subframe,rxdata,length<length_meas?length:length_meas);
LOG_D(OCM,"[SIM][DL] UE %d : rx_pwr (ADC out) %f dB for subframe %d\n",UE_id,10*log10((double)rx_pwr2*12*frame_parms->N_RB_DL) ,subframe);
#else
UNUSED_VARIABLE(rx_pwr2);
UNUSED_VARIABLE(tx_pwr);
UNUSED_VARIABLE(rx_pwr);
#endif
} // RU_output_mask
pthread_mutex_unlock(&sim->RU_output_mutex[UE_id]);
} // ru_id
}
void do_UL_sig(sim_t *sim, uint16_t subframe, uint8_t abstraction_flag, LTE_DL_FRAME_PARMS *frame_parms, uint32_t frame, int ru_id, uint8_t CC_id, int NB_UE_INST)
{
int32_t **txdata,**rxdata;
uint8_t UE_id=0;
uint8_t nb_antennas_rx = sim->UE2RU[0][0][CC_id]->nb_rx; // number of rx antennas at eNB
uint8_t nb_antennas_tx = sim->UE2RU[0][0][CC_id]->nb_tx; // number of tx antennas at UE
double tx_pwr, rx_pwr;
int32_t rx_pwr2;
uint32_t i,aa;
uint32_t sf_offset,sf_offset_tdd;
uint8_t hold_channel=0;
double s_re0[30720];
double s_re1[30720];
double *s_re[NB_ANTENNAS_TX];
double s_im0[30720];
double s_im1[30720];
double *s_im[NB_ANTENNAS_TX];
double r_re00[30720];
double r_re01[30720];
double *r_re0[NB_ANTENNAS_RX];
double r_im00[30720];
double r_im01[30720];
double *r_im0[NB_ANTENNAS_RX];
s_re[0] = s_re0;
s_im[0] = s_im0;
s_re[1] = s_re1;
s_im[1] = s_im1;
r_re0[0] = r_re00;
r_im0[0] = r_im00;
r_re0[1] = r_re01;
r_im0[1] = r_im01;
pthread_mutex_lock(&sim->UE_output_mutex[ru_id]);
// Clear RX signal for eNB = eNB_id
for (i=0; i<frame_parms->samples_per_tti; i++) {
for (aa=0; aa<nb_antennas_rx; aa++) {
sim->r_re_UL[ru_id][aa][i]=0.0;
sim->r_im_UL[ru_id][aa][i]=0.0;
}
}
pthread_mutex_unlock(&sim->UE_output_mutex[ru_id]);
// Compute RX signal for eNB = eNB_id
for (UE_id=0; UE_id<NB_UE_INST; UE_id++) {
txdata = PHY_vars_UE_g[UE_id][CC_id]->common_vars.txdata;
AssertFatal(txdata != NULL,"txdata is null\n");
sf_offset = subframe*frame_parms->samples_per_tti;
if (subframe>0) sf_offset_tdd = sf_offset - PHY_vars_UE_g[UE_id][CC_id]->N_TA_offset;
else sf_offset_tdd = sf_offset;
LOG_D(OCM,"txdata for subframe %d (%d), power %d\n",subframe,sf_offset_tdd,dB_fixed(signal_energy(&txdata[0][sf_offset_tdd],frame_parms->samples_per_tti)));
if (((double)PHY_vars_UE_g[UE_id][CC_id]->tx_power_dBm[subframe] +
sim->UE2RU[UE_id][ru_id][CC_id]->path_loss_dB) <= -125.0) {
// don't simulate a UE that is too weak
LOG_D(OCM,"[SIM][UL] ULPOWERS UE %d tx_pwr %d dBm (num_RE %d) for subframe %d (sf_offset %d,sf_offset_tdd %d)\n",
UE_id,
PHY_vars_UE_g[UE_id][CC_id]->tx_power_dBm[subframe],
PHY_vars_UE_g[UE_id][CC_id]->tx_total_RE[subframe],
subframe,sf_offset,sf_offset_tdd);
} else {
tx_pwr = dac_fixed_gain((double**)s_re,
(double**)s_im,
txdata,
sf_offset_tdd,
nb_antennas_tx,
frame_parms->samples_per_tti,
sf_offset_tdd,
frame_parms->ofdm_symbol_size,
14,
(double)PHY_vars_UE_g[UE_id][CC_id]->tx_power_dBm[subframe]-10*log10((double)PHY_vars_UE_g[UE_id][CC_id]->tx_total_RE[subframe]),
1,
NULL,
PHY_vars_UE_g[UE_id][CC_id]->tx_total_RE[subframe]); // This make the previous argument the total power
LOG_D(OCM,"[SIM][UL] ULPOWERS UE %d tx_pwr %f dBm (target %d dBm, num_RE %d) for subframe %d (sf_offset %d,sf_offset_tdd %d)\n",
UE_id,
10*log10(tx_pwr*PHY_vars_UE_g[UE_id][CC_id]->tx_total_RE[subframe]),
PHY_vars_UE_g[UE_id][CC_id]->tx_power_dBm[subframe],
PHY_vars_UE_g[UE_id][CC_id]->tx_total_RE[subframe],
subframe,sf_offset,sf_offset_tdd);
multipath_channel(sim->UE2RU[UE_id][ru_id][CC_id],s_re,s_im,r_re0,r_im0,
frame_parms->samples_per_tti,hold_channel,0);
rx_pwr = signal_energy_fp2(sim->UE2RU[UE_id][ru_id][CC_id]->ch[0],
sim->UE2RU[UE_id][ru_id][CC_id]->channel_length)*sim->UE2RU[UE_id][ru_id][CC_id]->channel_length;
LOG_D(OCM,"[SIM][UL] subframe %d Channel UE %d => RU %d : %f dB (hold %d,length %d, PL %f)\n",subframe,UE_id,ru_id,10*log10(rx_pwr),
hold_channel,sim->UE2RU[UE_id][ru_id][CC_id]->channel_length,
sim->UE2RU[UE_id][ru_id][CC_id]->path_loss_dB);
rx_pwr = signal_energy_fp(r_re0,r_im0,nb_antennas_rx,frame_parms->samples_per_tti,0);
LOG_D(OCM,"[SIM][UL] RU %d (%d/%d rx antennas) : rx_pwr %f dBm (tx_pwr - PL %f) for subframe %d, sptti %d\n",
ru_id,nb_antennas_rx,sim->UE2RU[UE_id][ru_id][CC_id]->nb_rx,10*log10(rx_pwr),10*log10(tx_pwr*PHY_vars_UE_g[UE_id][CC_id]->tx_total_RE[subframe])+sim->UE2RU[UE_id][ru_id][CC_id]->path_loss_dB,subframe,frame_parms->samples_per_tti);
/*
if (abs(10*log10(rx_pwr)-10*log10(tx_pwr*PHY_vars_UE_g[UE_id][CC_id]->tx_total_RE[subframe])-UE2RU[UE_id][ru_id][CC_id]->path_loss_dB)>3) {
write_output("txsig_re.m","s_re",s_re[0],frame_parms->samples_per_tti,1,7);
write_output("txsig_im.m","s_im",s_im[0],frame_parms->samples_per_tti,1,7);
write_output("rxsig_re.m","r_re",r_re0[0],frame_parms->samples_per_tti,1,7);
write_output("rxsig_im.m","r_im",r_im0[0],frame_parms->samples_per_tti,1,7);
exit(-1);
}*/
if (sim->UE2RU[UE_id][ru_id][CC_id]->first_run == 1)
sim->UE2RU[UE_id][ru_id][CC_id]->first_run = 0;
pthread_mutex_lock(&sim->UE_output_mutex[ru_id]);
for (aa=0; aa<nb_antennas_rx; aa++) {
for (i=0; i<frame_parms->samples_per_tti; i++) {
sim->r_re_UL[ru_id][aa][i]+=r_re0[aa][i];
sim->r_im_UL[ru_id][aa][i]+=r_im0[aa][i];
}
}
pthread_mutex_unlock(&sim->UE_output_mutex[ru_id]);
}
} //UE_id
double *r_re_p[2] = {sim->r_re_UL[ru_id][0],sim->r_re_UL[ru_id][1]};
double *r_im_p[2] = {sim->r_im_UL[ru_id][0],sim->r_im_UL[ru_id][1]};
rx_pwr = signal_energy_fp(r_re_p,r_im_p,nb_antennas_rx,frame_parms->samples_per_tti,0);
LOG_D(OCM,"[SIM][UL] RU %d (%d/%d rx antennas) : rx_pwr %f dBm (before RF) for subframe %d, gain %f\n",
ru_id,nb_antennas_rx,nb_antennas_rx,10*log10(rx_pwr),subframe,
(double)RC.ru[ru_id]->max_rxgain-(double)RC.ru[ru_id]->att_rx - 66.227);
rf_rx_simple(r_re_p,
r_im_p,
nb_antennas_rx,
frame_parms->samples_per_tti,
1e3/sim->UE2RU[0][ru_id][CC_id]->sampling_rate, // sampling time (ns)
(double)RC.ru[ru_id]->max_rxgain-(double)RC.ru[ru_id]->att_rx - 66.227); // rx_gain (dB) (66.227 = 20*log10(pow2(11)) = gain from the adc that will be applied later)
#ifdef DEBUG_SIM
rx_pwr = signal_energy_fp(r_re_p,r_im_p,nb_antennas_rx,frame_parms->samples_per_tti,0);//*(double)frame_parms->ofdm_symbol_size/(12.0*frame_parms->N_RB_DL;
LOG_D(OCM,"[SIM][UL] rx_pwr (ADC in) %f dB for subframe %d (rx_gain %f)\n",10*log10(rx_pwr),subframe,
(double)RC.ru[ru_id]->max_rxgain-(double)RC.ru[ru_id]->att_rx);
#endif
rxdata = RC.ru[ru_id]->common.rxdata;
sf_offset = subframe*frame_parms->samples_per_tti;
if (subframe>0) sf_offset_tdd = sf_offset - RC.ru[ru_id]->N_TA_offset;
else sf_offset_tdd = sf_offset;
adc(r_re_p,
r_im_p,
0,
sf_offset_tdd,
rxdata,
nb_antennas_rx,
frame_parms->samples_per_tti,
12);
#ifdef DEBUG_SIM
rx_pwr2 = signal_energy(rxdata[0]+sf_offset_tdd,frame_parms->samples_per_tti)*(double)frame_parms->ofdm_symbol_size/(12.0*frame_parms->N_RB_DL);
LOG_D(OCM,"[SIM][UL] RU %d rx_pwr (ADC out) %f dB (%d) for subframe %d (offset %d) = %p\n",ru_id,10*log10((double)rx_pwr2),rx_pwr2,subframe,sf_offset,rxdata[0]+sf_offset_tdd);
#else
UNUSED_VARIABLE(tx_pwr);
UNUSED_VARIABLE(rx_pwr);
UNUSED_VARIABLE(rx_pwr2);
#endif
}
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