Robert Schmidt
8107939f08
- all RAN code, CI code, configuration files, dockerfiles, in CSSL v1.0
- all deployment code (openshift, charts, ancillary files like shell
scripts), in MIT
- documentation in CC-BY-4.0
- exceptions might apply and are listed in NOTICE
- there is a new LICENSES folder with all licenses
- CONTRIBUTIONS.md has been updated accordingly
For automated changes based on OAI PL v1.1:
perl -i~ -0pe 's/\/\*.*Licensed to the OpenAirInterface.*openairinterface.org\n#?/\/*\n * SPDX-License-Identifier: LicenseRef-CSSL-1.0\n/s' **/*.{c,h,cpp}
perl -i~ -0pe 's/\/\*.*Licensed to the OpenAirInterface.*openairinterface.org\n#?/\/*\n * SPDX-License-Identifier: LicenseRef-CSSL-1.0\n/s' **/*.ts
perl -i~ -0pe 's/<!--.*Licensed to the OpenAirInterface.*openairinterface.org\n.*-->/<!-- SPDX-License-Identifier: LicenseRef-CSSL-1.0 -->/s' **/*.xml
The rest (cmake, files with missing license, cmake) manually.
124 lines
3.3 KiB
C
124 lines
3.3 KiB
C
/*
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* SPDX-License-Identifier: LicenseRef-CSSL-1.0
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*/
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#include "PHY/types.h"
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#include "PHY/defs_eNB.h"
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#include "common/utils/LOG/vcd_signal_dumper.h"
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#define DEBUG_PHY
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int lte_est_timing_advance(LTE_DL_FRAME_PARMS *frame_parms,
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LTE_eNB_SRS *lte_eNB_srs,
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unsigned int *eNB_id,
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unsigned char clear,
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unsigned char number_of_cards,
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short coef)
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{
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static int max_pos_fil2 = 0;
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int temp, i, aa, max_pos = 0,ind;
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int max_val=0;
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short Re,Im,ncoef;
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#ifdef DEBUG_PHY
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char fname[100],vname[100];
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#endif
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ncoef = 32768 - coef;
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for (ind=0; ind<number_of_cards; ind++) {
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if (ind==0)
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max_val=0;
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for (aa=0; aa<frame_parms->nb_antennas_rx; aa++) {
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// do ifft of channel estimate
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int len=0;
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switch(frame_parms->N_RB_DL) {
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case 6:
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len = 128;
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break;
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case 25:
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len = 512;
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break;
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case 50:
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len = 1024;
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break;
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case 100:
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len = 2048;
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break;
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}
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if (len)
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dft(get_dft(len), (int16_t *)lte_eNB_srs->srs_ch_estimates[aa], (int16_t *)lte_eNB_srs->srs_ch_estimates_time[aa], 1);
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#ifdef DEBUG_PHY
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sprintf(fname,"srs_ch_estimates_time_%d%d.m",ind,aa);
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sprintf(vname,"srs_time_%d%d",ind,aa);
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LOG_M(fname,vname,lte_eNB_srs->srs_ch_estimates_time[aa],frame_parms->ofdm_symbol_size*2,2,1);
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#endif
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}
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// we only use channel estimates from tx antenna 0 here
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// remember we fixed the SRS to use only every second subcarriers
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for (i = 0; i < frame_parms->ofdm_symbol_size/2; i++) {
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temp = 0;
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for (aa=0; aa<frame_parms->nb_antennas_rx; aa++) {
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Re = ((int16_t*)lte_eNB_srs->srs_ch_estimates_time[aa])[(i<<1)];
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Im = ((int16_t*)lte_eNB_srs->srs_ch_estimates_time[aa])[1+(i<<1)];
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temp += (Re*Re/2) + (Im*Im/2);
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}
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if (temp > max_val) {
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max_pos = i;
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max_val = temp;
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*eNB_id = ind;
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}
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}
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}
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// filter position to reduce jitter
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if (clear == 1)
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max_pos_fil2 = max_pos;
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else
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max_pos_fil2 = ((max_pos_fil2 * coef) + (max_pos * ncoef)) >> 15;
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return(max_pos_fil2);
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}
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int lte_est_timing_advance_pusch(LTE_DL_FRAME_PARMS *frame_parms,
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int32_t **ul_ch_estimates_time)
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{
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int temp, i, aa, max_pos=0, max_val=0;
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short Re,Im;
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// uint8_t cyclic_shift = 0;
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int sync_pos = 0;//(frame_parms->ofdm_symbol_size-cyclic_shift*frame_parms->ofdm_symbol_size/12)%(frame_parms->ofdm_symbol_size);
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AssertFatal(frame_parms->ofdm_symbol_size > 127,"frame_parms->ofdm_symbol_size %d<128\n",frame_parms->ofdm_symbol_size);
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AssertFatal(frame_parms->nb_antennas_rx >0 && frame_parms->nb_antennas_rx<=4,"frame_parms->nb_antennas_rx %d not in [1...%d]\n",
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frame_parms->nb_antennas_rx,4);
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for (i = 0; i < frame_parms->ofdm_symbol_size; i++) {
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temp = 0;
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for (aa=0; aa<frame_parms->nb_antennas_rx; aa++) {
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Re = ((int16_t*)ul_ch_estimates_time[aa])[(i<<1)];
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Im = ((int16_t*)ul_ch_estimates_time[aa])[1+(i<<1)];
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temp += (Re*Re/2) + (Im*Im/2);
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}
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if (temp > max_val) {
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max_pos = i;
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max_val = temp;
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}
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}
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if (max_pos>frame_parms->ofdm_symbol_size/2)
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max_pos = max_pos-frame_parms->ofdm_symbol_size;
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return max_pos - sync_pos;
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}
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