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.
122 lines
3.6 KiB
C
122 lines
3.6 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_UE.h"
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#include "PHY/LTE_ESTIMATION/lte_estimation.h"
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#include "PHY/impl_defs_top.h"
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#include "common/utils/LOG/vcd_signal_dumper.h"
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#define DEBUG_PHY
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// Adjust location synchronization point to account for drift
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// The adjustment is performed once per frame based on the
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// last channel estimate of the receiver
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void lte_adjust_synch(LTE_DL_FRAME_PARMS *frame_parms,
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PHY_VARS_UE *ue,
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module_id_t eNB_id,
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uint8_t subframe,
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unsigned char clear,
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short coef)
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{
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static int max_pos_fil = 0;
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static int count_max_pos_ok = 0;
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static int first_time = 1;
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int temp = 0, i, aa, max_val = 0, max_pos = 0;
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int diff;
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short Re,Im,ncoef;
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VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_ADJUST_SYNCH, VCD_FUNCTION_IN);
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ncoef = 32767 - coef;
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#ifdef DEBUG_PHY
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LOG_D(PHY,"AbsSubframe %d.%d: rx_offset (before) = %d\n",ue->proc.proc_rxtx[0].frame_rx%1024,subframe,ue->rx_offset);
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#endif //DEBUG_PHY
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// we only use channel estimates from tx antenna 0 here
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for (i = 0; i < frame_parms->nb_prefix_samples; 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*)ue->common_vars.common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates_time[eNB_id][aa])[(i<<1)];
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Im = ((int16_t*)ue->common_vars.common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates_time[eNB_id][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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// filter position to reduce jitter
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if (clear == 1)
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max_pos_fil = max_pos;
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else
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max_pos_fil = ((max_pos_fil * coef) + (max_pos * ncoef)) >> 15;
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// do not filter to have proactive timing adjustment
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max_pos_fil = max_pos;
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if(subframe == 5)
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{
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diff = max_pos_fil - (frame_parms->nb_prefix_samples>>3);
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if ( abs(diff) < SYNCH_HYST )
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ue->rx_offset = 0;
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else
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ue->rx_offset = diff;
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if(abs(diff)<5)
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count_max_pos_ok ++;
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else
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count_max_pos_ok = 0;
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if(count_max_pos_ok > 10 && first_time == 1)
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{
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first_time = 0;
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ue->time_sync_cell = 1;
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if (ue->mac_enabled==1) {
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LOG_I(PHY,"[UE%d] Sending synch status to higher layers\n",ue->Mod_id);
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//mac_resynch();
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//dl_phy_sync_success(ue->Mod_id,ue->proc.proc_rxtx[0].frame_rx,0,1);//ue->common_vars.eNb_id);
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ue->UE_mode[0] = PRACH;
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}
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else {
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ue->UE_mode[0] = PUSCH;
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}
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}
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if ( ue->rx_offset < 0 )
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ue->rx_offset += FRAME_LENGTH_COMPLEX_SAMPLES;
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if ( ue->rx_offset >= FRAME_LENGTH_COMPLEX_SAMPLES )
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ue->rx_offset -= FRAME_LENGTH_COMPLEX_SAMPLES;
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#ifdef DEBUG_PHY
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LOG_D(PHY,"AbsSubframe %d.%d: ThreadId %d diff =%i rx_offset (final) = %i : clear %d,max_pos = %d,max_pos_fil = %d (peak %d) max_val %d target_pos %d \n",
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ue->proc.proc_rxtx[ue->current_thread_id[subframe]].frame_rx,
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subframe,
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ue->current_thread_id[subframe],
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diff,
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ue->rx_offset,
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clear,
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max_pos,
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max_pos_fil,
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temp,max_val,
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(frame_parms->nb_prefix_samples>>3));
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#endif //DEBUG_PHY
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VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_ADJUST_SYNCH, VCD_FUNCTION_OUT);
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}
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}
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