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openairinterface5g/openair1/PHY/LTE_ESTIMATION/lte_eNB_measurements.c
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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 "PHY/defs_eNB.h"
#include "PHY/phy_extern.h"
#include "PHY/sse_intrin.h"
//#define k1 1000
#define k1 1024
#define k2 (1024-k1)
int32_t rx_power_avg_eNB[3];
void lte_eNB_I0_measurements(PHY_VARS_eNB *eNB,
int subframe,
module_id_t eNB_id,
unsigned char clear)
{
LTE_eNB_COMMON *common_vars = &eNB->common_vars;
LTE_DL_FRAME_PARMS *frame_parms = &eNB->frame_parms;
PHY_MEASUREMENTS_eNB *measurements = &eNB->measurements;
uint32_t *rb_mask = eNB->rb_mask_ul;
uint32_t aarx /* ,rx_power_correction */;
uint32_t rb;
int32_t *ul_ch;
int32_t n0_power_tot;
int64_t n0_power_tot2;
int len;
int offset;
// noise measurements
// for the moment we measure the noise on the 7th OFDM symbol (in S subframe)
measurements->n0_power_tot = 0;
if (common_vars->rxdata!=NULL) {
for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
if (clear == 1)
measurements->n0_power[aarx]=0;
measurements->n0_power[aarx] = ((k1*signal_energy(&common_vars->rxdata[aarx][(frame_parms->samples_per_tti<<1) -frame_parms->ofdm_symbol_size],
frame_parms->ofdm_symbol_size)) + k2*measurements->n0_power[aarx])>>10;
//measurements->n0_power[aarx] = (measurements->n0_power[aarx]) * 12*frame_parms->N_RB_DL)/(frame_parms->ofdm_symbol_size);
measurements->n0_power_dB[aarx] = (unsigned short) dB_fixed(measurements->n0_power[aarx]);
measurements->n0_power_tot += measurements->n0_power[aarx];
}
measurements->n0_power_tot_dB = (unsigned short) dB_fixed(measurements->n0_power_tot);
measurements->n0_power_tot_dBm = measurements->n0_power_tot_dB - eNB->rx_total_gain_dB;
// printf("n0_power %d\n",measurements->n0_power_tot_dB);
}
n0_power_tot2=0;
int nb_rb=0;
for (rb=0; rb<frame_parms->N_RB_UL; rb++) {
n0_power_tot=0;
int offset0= (frame_parms->first_carrier_offset + (rb*12))%frame_parms->ofdm_symbol_size;
if ((rb_mask[rb>>5]&(1<<(rb&31))) == 0) { // check that rb was not used in this subframe
nb_rb++;
for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
measurements->n0_subband_power[aarx][rb] = 0;
for (int s=0;s<14-(frame_parms->Ncp<<1);s++) {
// select the 7th symbol in an uplink subframe
offset = offset0 + (s*frame_parms->ofdm_symbol_size);
ul_ch = &common_vars->rxdataF[aarx][offset];
len = 12;
// just do first half of middle PRB for odd number of PRBs
if (((frame_parms->N_RB_UL&1) == 1) &&
(rb==(frame_parms->N_RB_UL>>1))) {
len=6;
}
AssertFatal(ul_ch, "RX signal buffer (freq) problem");
measurements->n0_subband_power[aarx][rb] += signal_energy_nodc(ul_ch,len);
}
measurements->n0_subband_power[aarx][rb]/=(14-(frame_parms->Ncp<<1));
measurements->n0_subband_power_dB[aarx][rb] = dB_fixed(measurements->n0_subband_power[aarx][rb]);
n0_power_tot += measurements->n0_subband_power[aarx][rb];
}
n0_power_tot/=frame_parms->nb_antennas_rx;
n0_power_tot2 += n0_power_tot;
measurements->n0_subband_power_tot_dB[rb] = dB_fixed(n0_power_tot/frame_parms->nb_antennas_rx);
measurements->n0_subband_power_tot_dBm[rb] = measurements->n0_subband_power_tot_dB[rb] - eNB->rx_total_gain_dB - dB_fixed(frame_parms->N_RB_UL);
}
}
if (nb_rb>0) measurements->n0_subband_power_avg_dB = dB_fixed(n0_power_tot2/nb_rb);
}
void lte_eNB_srs_measurements(PHY_VARS_eNB *eNB,
module_id_t eNB_id,
module_id_t UE_id,
unsigned char init_averaging)
{
LTE_DL_FRAME_PARMS *frame_parms = &eNB->frame_parms;
PHY_MEASUREMENTS_eNB *measurements = &eNB->measurements;
LTE_eNB_SRS *srs_vars = &eNB->srs_vars[UE_id];
int32_t aarx,rx_power_correction;
int32_t rx_power;
uint32_t rb;
int32_t *ul_ch;
//printf("Running eNB_srs_measurements for eNB_id %d\n",eNB_id);
if (init_averaging == 1)
rx_power_avg_eNB[UE_id] = 0;
rx_power = 0;
if ( (frame_parms->ofdm_symbol_size == 128) ||
(frame_parms->ofdm_symbol_size == 512) )
rx_power_correction = 2;
else
rx_power_correction = 1;
for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
measurements->rx_spatial_power[UE_id][0][aarx] =
((signal_energy_nodc(&srs_vars->srs_ch_estimates[aarx][frame_parms->first_carrier_offset],
(frame_parms->N_RB_DL*6)) +
signal_energy_nodc(&srs_vars->srs_ch_estimates[aarx][1],
(frame_parms->N_RB_DL*6)))*rx_power_correction) -
measurements->n0_power[aarx];
measurements->rx_spatial_power[UE_id][0][aarx]<<=1; // because of noise only in odd samples
measurements->rx_spatial_power_dB[UE_id][0][aarx] = (unsigned short) dB_fixed(measurements->rx_spatial_power[UE_id][0][aarx]);
measurements->wideband_cqi[UE_id][aarx] = measurements->rx_spatial_power[UE_id][0][aarx];
// measurements->rx_power[UE_id][aarx]/=frame_parms->nb_antennas_tx;
measurements->wideband_cqi_dB[UE_id][aarx] = (unsigned short) dB_fixed(measurements->wideband_cqi[UE_id][aarx]);
rx_power += measurements->wideband_cqi[UE_id][aarx];
// measurements->rx_avg_power_dB[UE_id] += measurements->rx_power_dB[UE_id][aarx];
}
// measurements->rx_avg_power_dB[UE_id]/=frame_parms->nb_antennas_rx;
if (init_averaging == 0)
rx_power_avg_eNB[UE_id] = ((k1*rx_power_avg_eNB[UE_id]) + (k2*rx_power))>>10;
else
rx_power_avg_eNB[UE_id] = rx_power;
measurements->wideband_cqi_tot[UE_id] = dB_fixed2(rx_power,2*measurements->n0_power_tot);
// times 2 since we have noise only in the odd carriers of the srs comb
measurements->rx_rssi_dBm[UE_id] = (int32_t)dB_fixed(rx_power_avg_eNB[UE_id])-eNB->rx_total_gain_dB;
for (aarx=0; aarx<frame_parms->nb_antennas_rx; aarx++) {
for (rb=0; rb<frame_parms->N_RB_DL; rb++) {
// printf("common_vars->srs_ch_estimates[0] => %x\n",common_vars->srs_ch_estimates[0]);
if (rb < 12)
ul_ch = &srs_vars->srs_ch_estimates[aarx][frame_parms->first_carrier_offset + (rb*12)];
else if (rb>12)
ul_ch = &srs_vars->srs_ch_estimates[aarx][6 + (rb-13)*12];
else {
measurements->subband_cqi_dB[UE_id][aarx][rb] = 0;
continue;
}
// cqi
if (aarx==0)
measurements->subband_cqi_tot[UE_id][rb]=0;
measurements->subband_cqi[UE_id][aarx][rb] = (signal_energy_nodc(ul_ch,12))*rx_power_correction - measurements->n0_power[aarx];
if (measurements->subband_cqi[UE_id][aarx][rb] < 0)
measurements->subband_cqi[UE_id][aarx][rb]=0;
measurements->subband_cqi_tot[UE_id][rb] += measurements->subband_cqi[UE_id][aarx][rb];
measurements->subband_cqi_dB[UE_id][aarx][rb] = dB_fixed2(measurements->subband_cqi[UE_id][aarx][rb],
2*measurements->n0_power[aarx]);
// 2*n0_power since we have noise from the odd carriers in the comb of the srs
// msg("subband_cqi[%d][%d][%d] => %d (%d dB)\n",eNB_id,aarx,rb,measurements->subband_cqi[aarx][rb],measurements->subband_cqi_dB[aarx][rb]);
}
}
for (rb=0; rb<frame_parms->N_RB_DL; rb++) {
measurements->subband_cqi_tot_dB[UE_id][rb] = dB_fixed2(measurements->subband_cqi_tot[UE_id][rb],
measurements->n0_power_tot);
/*
if (measurements->subband_cqi_tot_dB[UE_id][rb] == 65)
msg("eNB meas error *****subband_cqi_tot[%d][%d] %d => %d dB (n0 %d)\n",UE_id,rb,measurements->subband_cqi_tot[UE_id][rb],measurements->subband_cqi_tot_dB[UE_id][rb],measurements->n0_power_tot);
*/
}
}
void lte_eNB_I0_measurements_emul(PHY_VARS_eNB *eNB,
uint8_t sect_id)
{
LOG_D(PHY,"EMUL lte_eNB_IO_measurements_emul: eNB %d, sect %d\n",eNB->Mod_id,sect_id);
}
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