640 lines
25 KiB
C
640 lines
25 KiB
C
/*******************************************************************************
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OpenAirInterface
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Copyright(c) 1999 - 2014 Eurecom
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OpenAirInterface is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenAirInterface is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OpenAirInterface.The full GNU General Public License is
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included in this distribution in the file called "COPYING". If not,
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see <http://www.gnu.org/licenses/>.
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Contact Information
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OpenAirInterface Admin: openair_admin@eurecom.fr
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OpenAirInterface Tech : openair_tech@eurecom.fr
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OpenAirInterface Dev : openair4g-devel@lists.eurecom.fr
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Address : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
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*******************************************************************************/
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#include <string.h>
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#include <math.h>
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#include <unistd.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <time.h>
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#include "SIMULATION/TOOLS/defs.h"
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#include "SIMULATION/RF/defs.h"
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#include "PHY/types.h"
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#include "PHY/defs.h"
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#include "PHY/extern.h"
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#include "MAC_INTERFACE/extern.h"
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#ifdef OPENAIR2
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#include "LAYER2/MAC/defs.h"
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#include "LAYER2/MAC/extern.h"
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#include "UTIL/LOG/log_if.h"
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#include "UTIL/LOG/log_extern.h"
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#include "RRC/LITE/extern.h"
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#include "PHY_INTERFACE/extern.h"
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#include "UTIL/OCG/OCG.h"
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#include "UTIL/OPT/opt.h" // to test OPT
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#endif
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#include "UTIL/FIFO/types.h"
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#ifdef IFFT_FPGA
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#include "PHY/LTE_REFSIG/mod_table.h"
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#endif
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#include "SCHED/defs.h"
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#include "SCHED/extern.h"
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#ifdef XFORMS
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#include "forms.h"
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#include "phy_procedures_sim_form.h"
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#endif
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#include "oaisim.h"
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#define RF
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#define DEBUG_SIM
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int number_rb_ul;
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int first_rbUL ;
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extern Signal_buffers_t *signal_buffers_g;
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void do_DL_sig(double **r_re0,double **r_im0,
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double **r_re,double **r_im,
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double **s_re,double **s_im,
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channel_desc_t *eNB2UE[NUMBER_OF_eNB_MAX][NUMBER_OF_UE_MAX][MAX_NUM_CCs],
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node_desc_t *enb_data[NUMBER_OF_eNB_MAX],
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node_desc_t *ue_data[NUMBER_OF_UE_MAX],
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uint16_t next_slot,uint8_t abstraction_flag,LTE_DL_FRAME_PARMS *frame_parms,
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uint8_t UE_id,
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int CC_id)
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{
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int32_t att_eNB_id=-1;
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int32_t **txdata,**rxdata;
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uint8_t eNB_id=0;
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double tx_pwr;
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double rx_pwr;
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int32_t rx_pwr2;
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uint32_t i,aa;
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uint32_t slot_offset,slot_offset_meas = 0;
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double min_path_loss=-200;
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uint8_t hold_channel=0;
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// uint8_t aatx,aarx;
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uint8_t nb_antennas_rx = eNB2UE[0][0][CC_id]->nb_rx; // number of rx antennas at UE
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uint8_t nb_antennas_tx = eNB2UE[0][0][CC_id]->nb_tx; // number of tx antennas at eNB
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//LTE_DL_FRAME_PARMS *fp;
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// int subframe_sched = ((next_slot>>1) == 0) ? 9 : ((next_slot>>1)-1);
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if (next_slot==0)
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hold_channel = 0;
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else
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hold_channel = 1;
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if (abstraction_flag != 0) {
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//for (UE_id=0;UE_id<NB_UE_INST;UE_id++) {
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if (!hold_channel) {
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// calculate the random channel from each eNB
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for (eNB_id=0; eNB_id<NB_eNB_INST; eNB_id++) {
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random_channel(eNB2UE[eNB_id][UE_id][CC_id],abstraction_flag);
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/*
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for (i=0;i<eNB2UE[eNB_id][UE_id]->nb_taps;i++)
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printf("eNB2UE[%d][%d]->a[0][%d] = (%f,%f)\n",eNB_id,UE_id,i,eNB2UE[eNB_id][UE_id]->a[0][i].x,eNB2UE[eNB_id][UE_id]->a[0][i].y);
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*/
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freq_channel(eNB2UE[eNB_id][UE_id][CC_id], frame_parms->N_RB_DL,frame_parms->N_RB_DL*12+1);
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}
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// find out which eNB the UE is attached to
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for (eNB_id=0; eNB_id<NB_eNB_INST; eNB_id++) {
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if (find_ue(PHY_vars_UE_g[UE_id][CC_id]->lte_ue_pdcch_vars[0]->crnti,PHY_vars_eNB_g[eNB_id][CC_id])>=0) {
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// UE with UE_id is connected to eNb with eNB_id
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att_eNB_id=eNB_id;
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LOG_D(OCM,"A: UE attached to eNB (UE%d->eNB%d)\n",UE_id,eNB_id);
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}
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}
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// if UE is not attached yet, find assume its the eNB with the smallest pathloss
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if (att_eNB_id<0) {
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for (eNB_id=0; eNB_id<NB_eNB_INST; eNB_id++) {
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if (min_path_loss<eNB2UE[eNB_id][UE_id][CC_id]->path_loss_dB) {
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min_path_loss = eNB2UE[eNB_id][UE_id][CC_id]->path_loss_dB;
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att_eNB_id=eNB_id;
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LOG_D(OCM,"B: UE attached to eNB (UE%d->eNB%d)\n",UE_id,eNB_id);
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}
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}
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}
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if (att_eNB_id<0) {
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LOG_E(OCM,"Cannot find eNB for UE %d, return\n",UE_id);
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return; //exit(-1);
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}
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#ifdef DEBUG_SIM
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rx_pwr = signal_energy_fp2(eNB2UE[att_eNB_id][UE_id][CC_id]->ch[0],
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eNB2UE[att_eNB_id][UE_id][CC_id]->channel_length)*eNB2UE[att_eNB_id][UE_id][CC_id]->channel_length;
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LOG_D(OCM,"Channel (CCid %d) eNB %d => UE %d : tx_power %d dBm, path_loss %f dB\n",
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CC_id,att_eNB_id,UE_id,
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frame_parms->pdsch_config_common.referenceSignalPower,
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eNB2UE[att_eNB_id][UE_id][CC_id]->path_loss_dB);
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#endif
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//dlsch_abstraction(PHY_vars_UE_g[UE_id]->sinr_dB, rb_alloc, 8);
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// fill in perfect channel estimates
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channel_desc_t *desc1 = eNB2UE[att_eNB_id][UE_id][CC_id];
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int32_t **dl_channel_est = PHY_vars_UE_g[UE_id][CC_id]->lte_ue_common_vars.dl_ch_estimates[0];
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// double scale = pow(10.0,(enb_data[att_eNB_id]->tx_power_dBm + eNB2UE[att_eNB_id][UE_id]->path_loss_dB + (double) PHY_vars_UE_g[UE_id]->rx_total_gain_dB)/20.0);
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double scale = pow(10.0,(frame_parms->pdsch_config_common.referenceSignalPower+eNB2UE[att_eNB_id][UE_id][CC_id]->path_loss_dB + (double) PHY_vars_UE_g[UE_id][CC_id]->rx_total_gain_dB)/20.0);
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LOG_D(OCM,"scale =%lf (%d dB)\n",scale,(int) (20*log10(scale)));
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// freq_channel(desc1,frame_parms->N_RB_DL,nb_samples);
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//write_output("channel.m","ch",desc1->ch[0],desc1->channel_length,1,8);
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//write_output("channelF.m","chF",desc1->chF[0],nb_samples,1,8);
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int count,count1,a_rx,a_tx;
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for(a_tx=0; a_tx<nb_antennas_tx; a_tx++) {
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for (a_rx=0; a_rx<nb_antennas_rx; a_rx++) {
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//for (count=0;count<frame_parms->symbols_per_tti/2;count++)
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for (count=0; count<1; count++) {
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for (count1=0; count1<frame_parms->N_RB_DL*12; count1++) {
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((int16_t *) dl_channel_est[(a_tx<<1)+a_rx])[2*count1+(count*frame_parms->ofdm_symbol_size+LTE_CE_FILTER_LENGTH)*2]=(int16_t)(desc1->chF[a_rx+(a_tx*nb_antennas_rx)][count1].x*scale);
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((int16_t *) dl_channel_est[(a_tx<<1)+a_rx])[2*count1+1+(count*frame_parms->ofdm_symbol_size+LTE_CE_FILTER_LENGTH)*2]=(int16_t)(desc1->chF[a_rx+(a_tx*nb_antennas_rx)][count1].y*scale) ;
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}
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}
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}
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}
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/*
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if(PHY_vars_UE_g[UE_id]->transmission_mode[att_eNB_id]>=5)
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{
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lte_ue_measurements(PHY_vars_UE_g[UE_id],
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((next_slot-1)>>1)*frame_parms->samples_per_tti,
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1,
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abstraction_flag);
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PHY_vars_eNB_g[att_eNB_id]->dlsch_eNB[0][0]->pmi_alloc = quantize_subband_pmi(&PHY_vars_UE_g[UE_id]->PHY_measurements,0);
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// printf("pmi_alloc in channel sim: %d",PHY_vars_eNB_g[att_eNB_id]->dlsch_eNB[0][0]->pmi_alloc);
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}
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*/
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// calculate the SNR for the attached eNB (this assumes eNB always uses PMI stored in eNB_UE_stats; to be improved)
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init_snr(eNB2UE[att_eNB_id][UE_id][CC_id], enb_data[att_eNB_id], ue_data[UE_id], PHY_vars_UE_g[UE_id][CC_id]->sinr_dB, &PHY_vars_UE_g[UE_id][CC_id]->N0,
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PHY_vars_UE_g[UE_id][CC_id]->transmission_mode[att_eNB_id], PHY_vars_eNB_g[att_eNB_id][CC_id]->eNB_UE_stats[UE_id].DL_pmi_single,
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PHY_vars_eNB_g[att_eNB_id][CC_id]->mu_mimo_mode[UE_id].dl_pow_off,PHY_vars_eNB_g[att_eNB_id][CC_id]->lte_frame_parms.N_RB_DL);
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// calculate sinr here
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for (eNB_id = 0; eNB_id < NB_eNB_INST; eNB_id++) {
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if (att_eNB_id != eNB_id) {
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calculate_sinr(eNB2UE[eNB_id][UE_id][CC_id], enb_data[eNB_id], ue_data[UE_id], PHY_vars_UE_g[UE_id][CC_id]->sinr_dB,PHY_vars_eNB_g[att_eNB_id][CC_id]->lte_frame_parms.N_RB_DL);
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}
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}
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} // hold channel
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}
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else { //abstraction_flag
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/*
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Call do_OFDM_mod from phy_procedures_eNB_TX function
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*/
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// printf("r_re[0] %p\n",r_re[0]);
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for (aa=0; aa<nb_antennas_rx; aa++) {
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memset((void*)r_re[aa],0,(frame_parms->samples_per_tti>>1)*sizeof(double));
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memset((void*)r_im[aa],0,(frame_parms->samples_per_tti>>1)*sizeof(double));
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}
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/*
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for (i=0;i<16;i++)
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printf("%f, %X\n",r_re[aa][i],(unsigned long long)r_re[aa][i]);
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*/
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for (eNB_id=0; eNB_id<NB_eNB_INST; eNB_id++) {
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// if (((double)PHY_vars_UE_g[UE_id]->tx_power_dBm +
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// eNB2UE[eNB_id][UE_id]->path_loss_dB) <= -107.0)
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// break;
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txdata = PHY_vars_eNB_g[eNB_id][CC_id]->lte_eNB_common_vars.txdata[0];
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slot_offset = (next_slot)*(frame_parms->samples_per_tti>>1);
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slot_offset_meas = ((next_slot&1)==0) ? slot_offset : (slot_offset-(frame_parms->samples_per_tti>>1));
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tx_pwr = dac_fixed_gain(s_re,
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s_im,
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txdata,
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slot_offset,
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nb_antennas_tx,
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frame_parms->samples_per_tti>>1,
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slot_offset_meas,
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frame_parms->ofdm_symbol_size,
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14,
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// enb_data[eNB_id]->tx_power_dBm);
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frame_parms->pdsch_config_common.referenceSignalPower, // dBm/RE
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frame_parms->N_RB_DL*12);
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#ifdef DEBUG_SIM
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LOG_D(OCM,"[SIM][DL] eNB %d (CCid %d): tx_pwr %.1f dBm/RE (target %d dBm/RE), for slot %d (subframe %d)\n",
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eNB_id,CC_id,
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10*log10(tx_pwr),
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frame_parms->pdsch_config_common.referenceSignalPower,
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next_slot,
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next_slot>>1);
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#endif
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//eNB2UE[eNB_id][UE_id]->path_loss_dB = 0;
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multipath_channel(eNB2UE[eNB_id][UE_id][CC_id],s_re,s_im,r_re0,r_im0,
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frame_parms->samples_per_tti>>1,hold_channel);
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#ifdef DEBUG_SIM
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rx_pwr = signal_energy_fp2(eNB2UE[eNB_id][UE_id][CC_id]->ch[0],
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eNB2UE[eNB_id][UE_id][CC_id]->channel_length)*eNB2UE[eNB_id][UE_id][CC_id]->channel_length;
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LOG_D(OCM,"[SIM][DL] Channel eNB %d => UE %d (CCid %d): Channel gain %f dB (%f)\n",eNB_id,UE_id,CC_id,10*log10(rx_pwr),rx_pwr);
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#endif
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#ifdef DEBUG_SIM
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for (i=0; i<eNB2UE[eNB_id][UE_id][CC_id]->channel_length; i++)
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LOG_D(OCM,"channel(%d,%d)[%d] : (%f,%f)\n",eNB_id,UE_id,i,eNB2UE[eNB_id][UE_id][CC_id]->ch[0][i].x,eNB2UE[eNB_id][UE_id][CC_id]->ch[0][i].y);
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#endif
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LOG_D(OCM,"[SIM][DL] Channel eNB %d => UE %d (CCid %d): tx_power %.1f dBm/RE, path_loss %1.f dB\n",
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eNB_id,UE_id,CC_id,
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(double)frame_parms->pdsch_config_common.referenceSignalPower,
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// enb_data[eNB_id]->tx_power_dBm,
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eNB2UE[eNB_id][UE_id][CC_id]->path_loss_dB);
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#ifdef DEBUG_SIM
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rx_pwr = signal_energy_fp(r_re0,r_im0,nb_antennas_rx,
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frame_parms->ofdm_symbol_size,
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slot_offset_meas)/(12.0*frame_parms->N_RB_DL);
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LOG_D(OCM,"[SIM][DL] UE %d : rx_pwr %f dBm/RE (%f dBm RSSI)for slot %d (subframe %d)\n",UE_id,
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10*log10(rx_pwr),
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10*log10(rx_pwr*(double)frame_parms->N_RB_DL*12),next_slot,next_slot>>1);
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LOG_D(OCM,"[SIM][DL] UE %d : rx_pwr (noise) -132 dBm/RE (N0fs = %.1f dBm, N0B = %.1f dBm) for slot %d (subframe %d)\n",
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UE_id,
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10*log10(eNB2UE[eNB_id][UE_id][CC_id]->sampling_rate*1e6)-174,
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10*log10(eNB2UE[eNB_id][UE_id][CC_id]->sampling_rate*1e6*12*frame_parms->N_RB_DL/(double)frame_parms->ofdm_symbol_size)-174,
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next_slot,next_slot>>1);
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#endif
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if (eNB2UE[eNB_id][UE_id][CC_id]->first_run == 1)
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eNB2UE[eNB_id][UE_id][CC_id]->first_run = 0;
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// RF model
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#ifdef DEBUG_SIM
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LOG_D(OCM,"[SIM][DL] UE %d (CCid %d): rx_gain %d dB (-ADC %f) for slot %d (subframe %d)\n",UE_id,CC_id,PHY_vars_UE_g[UE_id][CC_id]->rx_total_gain_dB,
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PHY_vars_UE_g[UE_id][CC_id]->rx_total_gain_dB-66.227,next_slot,next_slot>>1);
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#endif
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/*
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rf_rx(r_re0,
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r_im0,
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NULL,
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NULL,
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0,
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nb_antennas_rx,
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frame_parms->samples_per_tti>>1,
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1e3/eNB2UE[eNB_id][UE_id]->BW, // sampling time (ns)
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0.0, // freq offset (Hz) (-20kHz..20kHz)
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0.0, // drift (Hz) NOT YET IMPLEMENTED
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ue_data[UE_id]->rx_noise_level, // noise_figure NOT YET IMPLEMENTED
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(double)PHY_vars_UE_g[UE_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)
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200.0, // IP3_dBm (dBm)
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&eNB2UE[eNB_id][UE_id]->ip, // initial phase
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30.0e3, // pn_cutoff (kHz)
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-500.0, // pn_amp (dBc) default: 50
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0.0, // IQ imbalance (dB),
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0.0); // IQ phase imbalance (rad)
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*/
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rf_rx_simple(r_re0,
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r_im0,
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nb_antennas_rx,
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frame_parms->samples_per_tti>>1,
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1e3/eNB2UE[eNB_id][UE_id][CC_id]->sampling_rate, // sampling time (ns)
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(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)
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#ifdef DEBUG_SIM
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rx_pwr = signal_energy_fp(r_re0,r_im0,
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nb_antennas_rx,
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frame_parms->ofdm_symbol_size,
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slot_offset_meas)/(12.0*frame_parms->N_RB_DL);
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LOG_D(OCM,"[SIM][DL] UE %d : ADC in (eNB %d) %f dBm/RE for slot %d (subframe %d)\n",
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UE_id,eNB_id,
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10*log10(rx_pwr),next_slot,next_slot>>1);
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#endif
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for (i=0; i<(frame_parms->samples_per_tti>>1); i++) {
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for (aa=0; aa<nb_antennas_rx; aa++) {
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r_re[aa][i]+=r_re0[aa][i];
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r_im[aa][i]+=r_im0[aa][i];
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}
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}
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}
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#ifdef DEBUG_SIM
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rx_pwr = signal_energy_fp(r_re,r_im,nb_antennas_rx,frame_parms->ofdm_symbol_size,slot_offset_meas)/(12.0*frame_parms->N_RB_DL);
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LOG_D(OCM,"[SIM][DL] UE %d : ADC in %f dBm for slot %d (subframe %d)\n",UE_id,10*log10(rx_pwr),next_slot,next_slot>>1);
|
|
#endif
|
|
|
|
rxdata = PHY_vars_UE_g[UE_id][CC_id]->lte_ue_common_vars.rxdata;
|
|
slot_offset = (next_slot)*(frame_parms->samples_per_tti>>1);
|
|
|
|
adc(r_re,
|
|
r_im,
|
|
0,
|
|
slot_offset,
|
|
rxdata,
|
|
nb_antennas_rx,
|
|
frame_parms->samples_per_tti>>1,
|
|
12);
|
|
|
|
#ifdef DEBUG_SIM
|
|
rx_pwr2 = signal_energy(rxdata[0]+slot_offset,frame_parms->ofdm_symbol_size)/(12.0*frame_parms->N_RB_DL);
|
|
LOG_D(OCM,"[SIM][DL] UE %d : rx_pwr (ADC out) %f dB/RE (%d) for slot %d (subframe %d), writing to %p\n",UE_id, 10*log10((double)rx_pwr2),rx_pwr2,next_slot,next_slot>>1,rxdata);
|
|
#else
|
|
UNUSED_VARIABLE(rx_pwr2);
|
|
UNUSED_VARIABLE(tx_pwr);
|
|
UNUSED_VARIABLE(rx_pwr);
|
|
#endif
|
|
//}// UE_index loop
|
|
}
|
|
|
|
}
|
|
|
|
|
|
void do_UL_sig(double **r_re0,double **r_im0,double **r_re,double **r_im,double **s_re,double **s_im,channel_desc_t *UE2eNB[NUMBER_OF_UE_MAX][NUMBER_OF_eNB_MAX][MAX_NUM_CCs],
|
|
node_desc_t *enb_data[NUMBER_OF_eNB_MAX],node_desc_t *ue_data[NUMBER_OF_UE_MAX],uint16_t next_slot,uint8_t abstraction_flag,LTE_DL_FRAME_PARMS *frame_parms, uint32_t frame,uint8_t CC_id)
|
|
{
|
|
|
|
int32_t **txdata,**rxdata;
|
|
#ifdef PHY_ABSTRACTION_UL
|
|
int32_t att_eNB_id=-1;
|
|
#endif
|
|
uint8_t eNB_id=0,UE_id=0;
|
|
|
|
uint8_t nb_antennas_rx = UE2eNB[0][0][CC_id]->nb_rx; // number of rx antennas at eNB
|
|
uint8_t nb_antennas_tx = UE2eNB[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 slot_offset,slot_offset_meas;
|
|
|
|
uint8_t hold_channel=0;
|
|
|
|
#ifdef PHY_ABSTRACTION_UL
|
|
double min_path_loss=-200;
|
|
uint16_t ul_nb_rb=0 ;
|
|
uint16_t ul_fr_rb=0;
|
|
int ulnbrb2 ;
|
|
int ulfrrb2 ;
|
|
uint8_t harq_pid;
|
|
int subframe = (next_slot>>1);
|
|
#endif
|
|
|
|
/*
|
|
if (next_slot==4)
|
|
hold_channel = 0;
|
|
else
|
|
hold_channel = 1;
|
|
*/
|
|
|
|
if (abstraction_flag!=0) {
|
|
#ifdef PHY_ABSTRACTION_UL
|
|
|
|
for (eNB_id=0; eNB_id<NB_eNB_INST; eNB_id++) {
|
|
for (UE_id=0; UE_id<NB_UE_INST; UE_id++) {
|
|
if (!hold_channel) {
|
|
random_channel(UE2eNB[UE_id][eNB_id][CC_id],abstraction_flag);
|
|
freq_channel(UE2eNB[UE_id][eNB_id][CC_id], frame_parms->N_RB_UL,frame_parms->N_RB_UL*12+1);
|
|
|
|
// REceived power at the eNB
|
|
rx_pwr = signal_energy_fp2(UE2eNB[UE_id][eNB_id][CC_id]->ch[0],
|
|
UE2eNB[UE_id][eNB_id][CC_id]->channel_length)*UE2eNB[UE_id][att_eNB_id][CC_id]->channel_length; // calculate the rx power at the eNB
|
|
}
|
|
|
|
// write_output("SINRch.m","SINRch",PHY_vars_eNB_g[att_eNB_id]->sinr_dB_eNB,frame_parms->N_RB_UL*12+1,1,1);
|
|
if(subframe>1 && subframe <5) {
|
|
harq_pid = subframe2harq_pid(frame_parms,frame,subframe);
|
|
ul_nb_rb = PHY_vars_eNB_g[att_eNB_id][CC_id]->ulsch_eNB[(uint8_t)UE_id]->harq_processes[harq_pid]->nb_rb;
|
|
ul_fr_rb = PHY_vars_eNB_g[att_eNB_id][CC_id]->ulsch_eNB[(uint8_t)UE_id]->harq_processes[harq_pid]->first_rb;
|
|
}
|
|
|
|
if(ul_nb_rb>1 && (ul_fr_rb < 25 && ul_fr_rb > -1)) {
|
|
number_rb_ul = ul_nb_rb;
|
|
first_rbUL = ul_fr_rb;
|
|
init_snr_up(UE2eNB[UE_id][att_eNB_id][CC_id],enb_data[att_eNB_id], ue_data[UE_id],PHY_vars_eNB_g[att_eNB_id][CC_id]->sinr_dB,&PHY_vars_UE_g[att_eNB_id][CC_id]->N0,ul_nb_rb,ul_fr_rb);
|
|
|
|
}
|
|
} //UE_id
|
|
} //eNB_id
|
|
|
|
#else
|
|
/* the following functions are not needed */
|
|
/*
|
|
if (abstraction_flag!=0) {
|
|
for (eNB_id=0;eNB_id<NB_eNB_INST;eNB_id++) {
|
|
for (UE_id=0;UE_id<NB_UE_INST;UE_id++) {
|
|
random_channel(UE2eNB[UE_id][eNB_id]);
|
|
freq_channel(UE2eNB[UE_id][eNB_id], frame_parms->N_RB_UL,2);
|
|
}
|
|
}
|
|
}
|
|
*/
|
|
#endif
|
|
} else { //without abstraction
|
|
|
|
/*
|
|
for (UE_id=0;UE_id<NB_UE_INST;UE_id++) {
|
|
do_OFDM_mod(PHY_vars_UE_g[UE_id]->lte_ue_common_vars.txdataF,PHY_vars_UE_g[UE_id]->lte_ue_common_vars.txdata,next_slot,&PHY_vars_UE_g[UE_id]->lte_frame_parms);
|
|
}
|
|
*/
|
|
|
|
for (eNB_id=0; eNB_id<NB_eNB_INST; eNB_id++) {
|
|
// Clear RX signal for eNB = eNB_id
|
|
for (i=0; i<(frame_parms->samples_per_tti>>1); i++) {
|
|
for (aa=0; aa<nb_antennas_rx; aa++) {
|
|
r_re[aa][i]=0.0;
|
|
r_im[aa][i]=0.0;
|
|
}
|
|
}
|
|
|
|
// 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]->lte_ue_common_vars.txdata;
|
|
slot_offset = (next_slot)*(frame_parms->samples_per_tti>>1);
|
|
slot_offset_meas = ((next_slot&1)==0) ? slot_offset : (slot_offset-(frame_parms->samples_per_tti>>1));
|
|
|
|
if (((double)PHY_vars_UE_g[UE_id][CC_id]->tx_power_dBm +
|
|
UE2eNB[UE_id][eNB_id][CC_id]->path_loss_dB) <= -125.0) {
|
|
|
|
// don't simulate a UE that is too weak
|
|
} else {
|
|
|
|
tx_pwr = dac_fixed_gain(s_re,
|
|
s_im,
|
|
txdata,
|
|
slot_offset,
|
|
nb_antennas_tx,
|
|
frame_parms->samples_per_tti>>1,
|
|
slot_offset_meas,
|
|
frame_parms->ofdm_symbol_size,
|
|
14,
|
|
(double)PHY_vars_UE_g[UE_id][CC_id]->tx_power_dBm-10*log10((double)PHY_vars_UE_g[UE_id][CC_id]->tx_total_RE),
|
|
PHY_vars_UE_g[UE_id][CC_id]->tx_total_RE); // This make the previous argument the total power
|
|
//ue_data[UE_id]->tx_power_dBm);
|
|
//#ifdef DEBUG_SIM
|
|
LOG_D(OCM,"[SIM][UL] UE %d tx_pwr %f dBm (target %d dBm, num_RE %d) for slot %d (subframe %d, slot_offset %d, slot_offset_meas %d)\n",
|
|
UE_id,
|
|
10*log10(tx_pwr),
|
|
PHY_vars_UE_g[UE_id][CC_id]->tx_power_dBm,
|
|
PHY_vars_UE_g[UE_id][CC_id]->tx_total_RE,
|
|
next_slot,next_slot>>1,slot_offset,slot_offset_meas);
|
|
//#endif
|
|
|
|
multipath_channel(UE2eNB[UE_id][eNB_id][CC_id],s_re,s_im,r_re0,r_im0,
|
|
frame_parms->samples_per_tti>>1,hold_channel);
|
|
|
|
//#ifdef DEBUG_SIM
|
|
rx_pwr = signal_energy_fp2(UE2eNB[UE_id][eNB_id][CC_id]->ch[0],
|
|
UE2eNB[UE_id][eNB_id][CC_id]->channel_length)*UE2eNB[UE_id][eNB_id][CC_id]->channel_length;
|
|
LOG_D(OCM,"[SIM][UL] slot %d Channel UE %d => eNB %d : %f dB (hold %d,length %d, PL %f)\n",next_slot,UE_id,eNB_id,10*log10(rx_pwr),
|
|
hold_channel,UE2eNB[UE_id][eNB_id][CC_id]->channel_length,
|
|
UE2eNB[UE_id][eNB_id][CC_id]->path_loss_dB);
|
|
//#endif
|
|
|
|
//#ifdef DEBUG_SIM
|
|
rx_pwr = signal_energy_fp(r_re0,r_im0,nb_antennas_rx,frame_parms->samples_per_tti>>1,0);
|
|
LOG_D(OCM,"[SIM][UL] eNB %d : rx_pwr %f dBm (%f) for slot %d (subframe %d), sptti %d\n",
|
|
eNB_id,10*log10(rx_pwr),rx_pwr,next_slot,next_slot>>1,frame_parms->samples_per_tti);
|
|
//#endif
|
|
|
|
|
|
if (UE2eNB[UE_id][eNB_id][CC_id]->first_run == 1)
|
|
UE2eNB[UE_id][eNB_id][CC_id]->first_run = 0;
|
|
|
|
|
|
|
|
for (aa=0; aa<nb_antennas_rx; aa++) {
|
|
for (i=0; i<(frame_parms->samples_per_tti>>1); i++) {
|
|
r_re[aa][i]+=r_re0[aa][i];
|
|
r_im[aa][i]+=r_im0[aa][i];
|
|
}
|
|
}
|
|
}
|
|
} //UE_id
|
|
|
|
// RF model
|
|
/*
|
|
rf_rx(r_re0,
|
|
r_im0,
|
|
NULL,
|
|
NULL,
|
|
0,
|
|
frame_parms->nb_antennas_rx,
|
|
frame_parms->samples_per_tti>>1,
|
|
1e3/UE2eNB[UE_id][eNB_id]->BW, // sampling time (ns)
|
|
0.0, // freq offset (Hz) (-20kHz..20kHz)
|
|
0.0, // drift (Hz) NOT YET IMPLEMENTED
|
|
enb_data[eNB_id]->rx_noise_level, // noise_figure NOT YET IMPLEMENTED
|
|
(double)PHY_vars_eNB_g[eNB_id]->rx_total_gain_eNB_dB - 66.227, // rx_gain (dB) (66.227 = 20*log10(pow2(11)) = gain from the adc that will be applied later)
|
|
200.0, // IP3_dBm (dBm)
|
|
&UE2eNB[UE_id][eNB_id]->ip, // initial phase
|
|
30.0e3, // pn_cutoff (kHz)
|
|
-500.0, // pn_amp (dBc) default: 50
|
|
0.0, // IQ imbalance (dB),
|
|
0.0); // IQ phase imbalance (rad)
|
|
*/
|
|
|
|
rf_rx_simple(r_re,
|
|
r_im,
|
|
nb_antennas_rx,
|
|
frame_parms->samples_per_tti>>1,
|
|
1e3/UE2eNB[0][eNB_id][CC_id]->sampling_rate, // sampling time (ns)
|
|
(double)PHY_vars_eNB_g[eNB_id][CC_id]->rx_total_gain_eNB_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_re,r_im,nb_antennas_rx,frame_parms->samples_per_tti>>1,0)*(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 slot %d (subframe %d)\n",10*log10(rx_pwr),next_slot,next_slot>>1);
|
|
#endif
|
|
|
|
rxdata = PHY_vars_eNB_g[eNB_id][CC_id]->lte_eNB_common_vars.rxdata[0];
|
|
slot_offset = (next_slot)*(frame_parms->samples_per_tti>>1);
|
|
|
|
adc(r_re,
|
|
r_im,
|
|
0,
|
|
slot_offset,
|
|
rxdata,
|
|
nb_antennas_rx,
|
|
frame_parms->samples_per_tti>>1,
|
|
12);
|
|
|
|
#ifdef DEBUG_SIM
|
|
rx_pwr2 = signal_energy(rxdata[0]+slot_offset,frame_parms->samples_per_tti>>1)*(double)frame_parms->ofdm_symbol_size/(12.0*frame_parms->N_RB_DL);
|
|
LOG_D(OCM,"[SIM][UL] eNB %d rx_pwr (ADC out) %f dB (%d) for slot %d (subframe %d)\n",eNB_id,10*log10((double)rx_pwr2),rx_pwr2,next_slot,next_slot>>1);
|
|
#else
|
|
UNUSED_VARIABLE(tx_pwr);
|
|
UNUSED_VARIABLE(rx_pwr);
|
|
UNUSED_VARIABLE(rx_pwr2);
|
|
#endif
|
|
|
|
} // eNB_id
|
|
} // abstraction_flag==0
|
|
|
|
}
|
|
|
|
|
|
void init_channel_vars(LTE_DL_FRAME_PARMS *frame_parms, double ***s_re,double ***s_im,double ***r_re,double ***r_im,double ***r_re0,double ***r_im0)
|
|
{
|
|
|
|
int i;
|
|
|
|
*s_re = malloc(2*sizeof(double*));
|
|
*s_im = malloc(2*sizeof(double*));
|
|
*r_re = malloc(2*sizeof(double*));
|
|
*r_im = malloc(2*sizeof(double*));
|
|
*r_re0 = malloc(2*sizeof(double*));
|
|
*r_im0 = malloc(2*sizeof(double*));
|
|
|
|
|
|
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));
|
|
(*r_re0)[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
|
|
bzero((*r_re0)[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
|
|
(*r_im0)[i] = malloc(FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
|
|
bzero((*r_im0)[i],FRAME_LENGTH_COMPLEX_SAMPLES*sizeof(double));
|
|
}
|
|
}
|
|
|
|
|