Robert Schmidt
ffc4f464f5
When a header is changed, all including files need to be recompiled, too. Thus, including a header needlessly all over the place drives compile times up without any reason.
139 lines
4.5 KiB
C
139 lines
4.5 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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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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