771 lines
35 KiB
C
771 lines
35 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 <string.h>
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#include "defs.h"
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#include "PHY/defs.h"
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//#define DEBUG_CH
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int lte_dl_mbsfn_channel_estimation(PHY_VARS_UE *ue,
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uint8_t eNB_id,
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uint8_t eNB_offset,
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int subframe,
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unsigned char l)
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{
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int pilot[600] __attribute__((aligned(16)));
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unsigned char aarx,aa;
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unsigned int rb;
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short *pil,*rxF,*ch,*ch0,*ch1,*ch11,*chp,*ch_prev;
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int ch_offset,symbol_offset;
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// unsigned int n;
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// int i;
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int **dl_ch_estimates=ue->common_vars.common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates[0];
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int **rxdataF=ue->common_vars.common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].rxdataF;
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ch_offset = (l*(ue->frame_parms.ofdm_symbol_size));
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symbol_offset = ch_offset;//phy_vars_ue->lte_frame_parms.ofdm_symbol_size*l;
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for (aarx=0; aarx<ue->frame_parms.nb_antennas_rx; aarx++) {
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// generate pilot
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if ((l==2)||(l==6)||(l==10)) {
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lte_dl_mbsfn_rx(ue,
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&pilot[0],
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subframe,
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l>>2);
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} // if symbol==2, return 0 else if symbol = 6, return 1, else if symbol=10 return 2
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pil = (short *)&pilot[0];
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rxF = (short *)&rxdataF[aarx][((symbol_offset+ue->frame_parms.first_carrier_offset))];
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ch = (short *)&dl_ch_estimates[aarx][ch_offset];
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// if (eNb_id==0)
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memset(ch,0,4*(ue->frame_parms.ofdm_symbol_size));
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//***********************************************************************
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if ((ue->frame_parms.N_RB_DL==6) ||
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(ue->frame_parms.N_RB_DL==50) ||
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(ue->frame_parms.N_RB_DL==100)) {
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// Interpolation and extrapolation;
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if (l==6) {
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// ________________________First half of RBs____________________
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ch+=2;
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rxF+=2;
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}
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for (rb=0; rb<ue->frame_parms.N_RB_DL; rb++) {
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// ------------------------1st pilot------------------------
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if (rb==(ue->frame_parms.N_RB_DL>>1)) {
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rxF = (short *)&rxdataF[aarx][symbol_offset+1];
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if (l==6)
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rxF+=2;
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}
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ch[0] = (short)(((int)pil[0]*rxF[0] - (int)pil[1]*rxF[1])>>15);
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ch[1] = (short)(((int)pil[0]*rxF[1] + (int)pil[1]*rxF[0])>>15);
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ch[2] = ch[0]>>1;
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ch[3] = ch[1]>>1;
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/*
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printf("rb %d: pil0 (%d,%d) x (%d,%d) = (%d,%d)\n",
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rb,pil[0],pil[1],rxF[0],rxF[1],ch[0],ch[1]);*/
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if ((rb>0)&&(rb!=(ue->frame_parms.N_RB_DL>>1))) {
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ch[-2] += ch[2];
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ch[-1] += ch[3];
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} else {
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ch[-2]= ch[0];
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ch[-1]= ch[1];
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}
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// ------------------------2nd pilot------------------------
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ch[4] = (short)(((int)pil[2]*rxF[4] - (int)pil[3]*rxF[5])>>15);
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ch[5] = (short)(((int)pil[2]*rxF[5] + (int)pil[3]*rxF[4])>>15);
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ch[6] = ch[4]>>1;
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ch[7] = ch[5]>>1;
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ch[2] += ch[6];
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ch[3] += ch[7];
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/* printf("rb %d: pil1 (%d,%d) x (%d,%d) = (%d,%d)\n",
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rb,pil[2],pil[3],rxF[4],rxF[5],ch[4],ch[5]);*/
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// ------------------------3rd pilot------------------------
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ch[8] = (short)(((int)pil[4]*rxF[8] - (int)pil[5]*rxF[9])>>15);
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ch[9] = (short)(((int)pil[4]*rxF[9] + (int)pil[5]*rxF[8])>>15);
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ch[10] = ch[8]>>1;
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ch[11] = ch[9]>>1;
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ch[6] += ch[10];
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ch[7] += ch[11];
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/* printf("rb %d: pil2 (%d,%d) x (%d,%d) = (%d,%d)\n",
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rb,pil[4],pil[5],rxF[8],rxF[9],ch[8],ch[9]);*/
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// ------------------------4th pilot------------------------
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ch[12] = (short)(((int)pil[6]*rxF[12] - (int)pil[7]*rxF[13])>>15);
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ch[13] = (short)(((int)pil[6]*rxF[13] + (int)pil[7]*rxF[12])>>15);
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ch[14] = ch[12]>>1;
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ch[15] = ch[13]>>1;
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ch[10] += ch[14];
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ch[11] += ch[15];
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/* printf("rb %d: pil3 (%d,%d) x (%d,%d) = (%d,%d)\n",
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rb,pil[6],pil[7],rxF[12],rxF[13],ch[12],ch[13]);*/
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// ------------------------5th pilot------------------------
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ch[16] = (short)(((int)pil[8]*rxF[16] - (int)pil[9]*rxF[17])>>15);
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ch[17] = (short)(((int)pil[8]*rxF[17] + (int)pil[9]*rxF[16])>>15);
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ch[18] = ch[16]>>1;
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ch[19] = ch[17]>>1;
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ch[14] += ch[18];
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ch[15] += ch[19];
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/* printf("rb %d: pil4 (%d,%d) x (%d,%d) = (%d,%d)\n",
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rb,pil[4],pil[5],rxF[16],rxF[17],ch[16],ch[17]);*/
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// ------------------------6th pilot------------------------
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ch[20] = (short)(((int)pil[10]*rxF[20] - (int)pil[11]*rxF[21])>>15);
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ch[21] = (short)(((int)pil[10]*rxF[21] + (int)pil[11]*rxF[20])>>15);
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if ((rb<(ue->frame_parms.N_RB_DL-1))&&
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(rb!=((ue->frame_parms.N_RB_DL>>1)-1))) {
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ch[22] = ch[20]>>1;
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ch[23] = ch[21]>>1;
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ch[18] += ch[22];
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ch[19] += ch[23];
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} else {
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ch[22] = ch[20];
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ch[23] = ch[21];
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ch[18] += (ch[22]>>1);
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ch[19] += (ch[23]>>1);
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}
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/* printf("rb %d: pil5 (%d,%d) x (%d,%d) = (%d,%d)\n",
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rb,pil[10],pil[11],rxF[20],rxF[21],ch[20],ch[21]);
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printf("ch11 (%d,%d)\n",ch[22],ch[23]);*/
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pil+=12;
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ch+=24;
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rxF+=24;
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}
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}
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//*********************************************************************
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else if (ue->frame_parms.N_RB_DL==25) {
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//printf("Channel estimation\n");
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//------------------------ loop over first 12 RBs------------------------
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if (l==6) {
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// ________________________First half of RBs____________________
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ch+=2;
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rxF+=2;
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for (rb=0; rb<12; rb++) {
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// ------------------------1st pilot------------------------
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ch[0] = (short)(((int)pil[0]*rxF[0] - (int)pil[1]*rxF[1])>>15);
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ch[1] = (short)(((int)pil[0]*rxF[1] + (int)pil[1]*rxF[0])>>15);
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ch[2] = ch[0]>>1;
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ch[3] = ch[1]>>1;
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/*
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printf("rb %d: pil0 (%d,%d) x (%d,%d) = (%d,%d)\n",
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rb,pil[0],pil[1],rxF[0],rxF[1],ch[0],ch[1]);*/
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if (rb>0) {
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ch[-2] += ch[2];
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ch[-1] += ch[3];
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} else {
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ch[-2]= ch[0];
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ch[-1]= ch[1];
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// ch[-2]= (ch[0]>>1)*3- ch[4];
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// ch[-1]= (ch[1]>>1)*3- ch[5];
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}
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// ------------------------2nd pilot------------------------
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ch[4] = (short)(((int)pil[2]*rxF[4] - (int)pil[3]*rxF[5])>>15);
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ch[5] = (short)(((int)pil[2]*rxF[5] + (int)pil[3]*rxF[4])>>15);
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ch[6] = ch[4]>>1;
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ch[7] = ch[5]>>1;
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ch[2] += ch[6];
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ch[3] += ch[7];
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/* printf("rb %d: pil1 (%d,%d) x (%d,%d) = (%d,%d)\n",
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rb,pil[2],pil[3],rxF[4],rxF[5],ch[4],ch[5]);*/
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// ------------------------3rd pilot------------------------
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ch[8] = (short)(((int)pil[4]*rxF[8] - (int)pil[5]*rxF[9])>>15);
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ch[9] = (short)(((int)pil[4]*rxF[9] + (int)pil[5]*rxF[8])>>15);
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ch[10] = ch[8]>>1;
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ch[11] = ch[9]>>1;
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ch[6] += ch[10];
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ch[7] += ch[11];
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/* printf("rb %d: pil2 (%d,%d) x (%d,%d) = (%d,%d)\n",
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rb,pil[4],pil[5],rxF[8],rxF[9],ch[8],ch[9]);*/
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// ------------------------4th pilot------------------------
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ch[12] = (short)(((int)pil[6]*rxF[12] - (int)pil[7]*rxF[13])>>15);
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ch[13] = (short)(((int)pil[6]*rxF[13] + (int)pil[7]*rxF[12])>>15);
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ch[14] = ch[12]>>1;
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ch[15] = ch[13]>>1;
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ch[10] += ch[14];
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ch[11] += ch[15];
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/* printf("rb %d: pil3 (%d,%d) x (%d,%d) = (%d,%d)\n",
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rb,pil[6],pil[7],rxF[12],rxF[13],ch[12],ch[13]);*/
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// ------------------------5th pilot------------------------
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ch[16] = (short)(((int)pil[8]*rxF[16] - (int)pil[9]*rxF[17])>>15);
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ch[17] = (short)(((int)pil[8]*rxF[17] + (int)pil[9]*rxF[16])>>15);
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ch[18] = ch[16]>>1;
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ch[19] = ch[17]>>1;
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ch[14] += ch[18];
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ch[15] += ch[19];
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/* printf("rb %d: pil4 (%d,%d) x (%d,%d) = (%d,%d)\n",
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rb,pil[4],pil[5],rxF[16],rxF[17],ch[16],ch[17]);*/
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// ------------------------6th pilot------------------------
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ch[20] = (short)(((int)pil[10]*rxF[20] - (int)pil[11]*rxF[21])>>15);
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ch[21] = (short)(((int)pil[10]*rxF[21] + (int)pil[11]*rxF[20])>>15);
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ch[22] = ch[20]>>1;
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ch[23] = ch[21]>>1;
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ch[18] += ch[22];
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ch[19] += ch[23];
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/* printf("rb %d: pil5 (%d,%d) x (%d,%d) = (%d,%d)\n",
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rb,pil[10],pil[11],rxF[20],rxF[21],ch[20],ch[21]);
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printf("ch11 (%d,%d)\n",ch[22],ch[23]);*/
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pil+=12;
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ch+=24;
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rxF+=24;
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}
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// Middle RB
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// ________________________First half of RB___________________
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// ------------------------1st pilot---------------------------
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chp = ch-24;
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ch[0] = (short)(((int)pil[0]*rxF[0] - (int)pil[1]*rxF[1])>>15);
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ch[1] = (short)(((int)pil[0]*rxF[1] + (int)pil[1]*rxF[0])>>15);
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ch[2] = ch[0]>>1;
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ch[3] = ch[1]>>1;
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chp[22] += ch[2];
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chp[23] += ch[3];
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/* printf("rb %d: pil0 (%d,%d) x (%d,%d) = (%d,%d)\n",
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rb,pil[0],pil[1],rxF[0],rxF[1],ch[0],ch[1]);*/
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//printf("interp0: chp[0] (%d,%d) ch23 (%d,%d)\n",chp[22],chp[23],ch[2],ch[3]);
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// ------------------------2nd pilot------------------------
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ch[4] = (short)(((int)pil[2]*rxF[4] - (int)pil[3]*rxF[5])>>15);
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ch[5] = (short)(((int)pil[2]*rxF[5] + (int)pil[3]*rxF[4])>>15);
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ch[6] = ch[4]>>1;
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ch[7] = ch[5]>>1;
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ch[2] += ch[6];
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ch[3] += ch[7];
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/* printf("rb %d: pil1 (%d,%d) x (%d,%d) = (%d,%d)\n",
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rb,pil[2],pil[3],rxF[4],rxF[5],ch[4],ch[5]);
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printf("interp1: ch23 (%d,%d) \n",ch[2],ch[3]);*/
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// ------------------------3rd pilot------------------------
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ch[8] = (short)(((int)pil[4]*rxF[8] - (int)pil[5]*rxF[9])>>15);
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ch[9] = (short)(((int)pil[4]*rxF[9] + (int)pil[5]*rxF[8])>>15);
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ch[10] = ch[8]>>1;
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ch[11] = ch[9]>>1;
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//ch[10] = (ch[8])/3;
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//ch[11] = (ch[9])/3;
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ch[6] += ch[10];
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ch[7] += ch[11];
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/* printf("rb %d: pil2 (%d,%d) x (%d,%d) = (%d,%d)\n",
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rb,pil[4],pil[5],rxF[8],rxF[9],ch[8],ch[9]);*/
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// printf("Second half\n");
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// ________________________Second half of RB____________________
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rxF = (short *)&rxdataF[aarx][((symbol_offset+2))];
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// 4th pilot
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ch[12] = (short)(((int)pil[6]*rxF[0] - (int)pil[7]*rxF[1])>>15);
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ch[13] = (short)(((int)pil[6]*rxF[1] + (int)pil[7]*rxF[0])>>15);
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ch[14] = ch[12]>>1;
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ch[15] = ch[13]>>1;
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ch[10] = (ch[8]/3)+(ch[12]<<1)/3;
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ch[11] = (ch[9]/3)+(ch[13]<<1)/3;
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/* printf("rb %d: pil3 (%d,%d) x (%d,%d) = (%d,%d)\n",
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rb,pil[6],pil[7],rxF[0],rxF[1],ch[12],ch[13]);*/
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// ------------------------5th pilot------------------------
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ch[16] = (short)(((int)pil[8]*rxF[4] - (int)pil[9]*rxF[5])>>15);
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ch[17] = (short)(((int)pil[8]*rxF[5] + (int)pil[9]*rxF[4])>>15);
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ch[18] = ch[16]>>1;
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ch[19] = ch[17]>>1;
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ch[14] += ch[18];
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ch[15] += ch[19];
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/* printf("rb %d: pil4 (%d,%d) x (%d,%d) = (%d,%d)\n",
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rb,pil[4],pil[5],rxF[4],rxF[5],ch[16],ch[17]);*/
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// ------------------------6th pilot------------------------
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ch[20] = (short)(((int)pil[10]*rxF[8] - (int)pil[11]*rxF[9])>>15);
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ch[21] = (short)(((int)pil[10]*rxF[9] + (int)pil[11]*rxF[8])>>15);
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ch[22] = ch[20]>>1;
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ch[23] = ch[21]>>1;
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ch[18] += ch[22];
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ch[19] += ch[23];
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/* printf("rb %d: pil5 (%d,%d) x (%d,%d) = (%d,%d)\n",
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rb,pil[10],pil[11],rxF[8],rxF[9],ch[20],ch[21]);*/
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pil+=12;
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ch+=24;
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rxF+=12;
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// ________________________Second half of RBs____________________
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for (rb=0; rb<11; rb++) {
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// ------------------------1st pilot---------------------------
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ch[0] = (short)(((int)pil[0]*rxF[0] - (int)pil[1]*rxF[1])>>15);
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ch[1] = (short)(((int)pil[0]*rxF[1] + (int)pil[1]*rxF[0])>>15);
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ch[2] = ch[0]>>1;
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ch[3] = ch[1]>>1;
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/* printf("rb %d: pil0 (%d,%d) x (%d,%d) = (%d,%d)\n",
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13+rb,pil[0],pil[1],rxF[0],rxF[1],ch[0],ch[1]);*/
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//if (rb>0) {
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ch[-2] += ch[2];
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ch[-1] += ch[3];
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//}
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// ------------------------2nd pilot------------------------
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ch[4] = (short)(((int)pil[2]*rxF[4] - (int)pil[3]*rxF[5])>>15);
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ch[5] = (short)(((int)pil[2]*rxF[5] + (int)pil[3]*rxF[4])>>15);
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ch[6] = ch[4]>>1;
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ch[7] = ch[5]>>1;
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ch[2] += ch[6];
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ch[3] += ch[7];
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/* printf("rb %d: pil1 (%d,%d) x (%d,%d) = (%d,%d)\n",
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13+rb,pil[2],pil[3],rxF[4],rxF[5],ch[4],ch[5]);*/
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// ------------------------3rd pilot------------------------
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ch[8] = (short)(((int)pil[4]*rxF[8] - (int)pil[5]*rxF[9])>>15);
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ch[9] = (short)(((int)pil[4]*rxF[9] + (int)pil[5]*rxF[8])>>15);
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ch[10] = ch[8]>>1;
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ch[11] = ch[9]>>1;
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ch[6] += ch[10];
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ch[7] += ch[11];
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/* printf("rb %d: pil2 (%d,%d) x (%d,%d) = (%d,%d)\n",
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13+rb,pil[4],pil[5],rxF[8],rxF[9],ch[8],ch[9]); */
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// ------------------------4th pilot------------------------
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ch[12] = (short)(((int)pil[6]*rxF[12] - (int)pil[7]*rxF[13])>>15);
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ch[13] = (short)(((int)pil[6]*rxF[13] + (int)pil[7]*rxF[12])>>15);
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ch[14] = ch[12]>>1;
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|
ch[15] = ch[13]>>1;
|
|
ch[10] += ch[14];
|
|
ch[11] += ch[15];
|
|
/* printf("rb %d: pil3 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[6],pil[7],rxF[12],rxF[13],ch[12],ch[13]);*/
|
|
// ------------------------5th pilot------------------------
|
|
ch[16] = (short)(((int)pil[8]*rxF[16] - (int)pil[9]*rxF[17])>>15);
|
|
ch[17] = (short)(((int)pil[8]*rxF[17] + (int)pil[9]*rxF[16])>>15);
|
|
ch[18] = ch[16]>>1;
|
|
ch[19] = ch[17]>>1;
|
|
ch[14] += ch[18];
|
|
ch[15] += ch[19];
|
|
/* printf("rb %d: pil4 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[4],pil[5],rxF[16],rxF[17],ch[16],ch[17]);*/
|
|
// ------------------------6th pilot------------------------
|
|
ch[20] = (short)(((int)pil[10]*rxF[20] - (int)pil[11]*rxF[21])>>15);
|
|
ch[21] = (short)(((int)pil[10]*rxF[21] + (int)pil[11]*rxF[20])>>15);
|
|
ch[22] = ch[20]>>1;
|
|
ch[23] = ch[21]>>1;
|
|
ch[18] += ch[22];
|
|
ch[19] += ch[23];
|
|
/* printf("rb %d: pil5 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[10],pil[11],rxF[20],rxF[21],ch[20],ch[21]);*/
|
|
pil+=12;
|
|
ch+=24;
|
|
rxF+=24;
|
|
}
|
|
|
|
// ------------------------Last PRB ---------------------------
|
|
// ------------------------1st pilot---------------------------
|
|
ch[0] = (short)(((int)pil[0]*rxF[0] - (int)pil[1]*rxF[1])>>15);
|
|
ch[1] = (short)(((int)pil[0]*rxF[1] + (int)pil[1]*rxF[0])>>15);
|
|
ch[2] = ch[0]>>1;
|
|
ch[3] = ch[1]>>1;
|
|
ch[-2] += ch[2];
|
|
ch[-1] += ch[3];
|
|
/* printf("rb %d: pil0 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[0],pil[1],rxF[0],rxF[1],ch[0],ch[1]);*/
|
|
// ------------------------2nd pilot------------------------
|
|
ch[4] = (short)(((int)pil[2]*rxF[4] - (int)pil[3]*rxF[5])>>15);
|
|
ch[5] = (short)(((int)pil[2]*rxF[5] + (int)pil[3]*rxF[4])>>15);
|
|
ch[6] = ch[4]>>1;
|
|
ch[7] = ch[5]>>1;
|
|
ch[2] += ch[6];
|
|
ch[3] += ch[7];
|
|
/* printf("rb %d: pil1 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[2],pil[3],rxF[4],rxF[5],ch[4],ch[5]); */
|
|
// ------------------------3rd pilot------------------------
|
|
ch[8] = (short)(((int)pil[4]*rxF[8] - (int)pil[5]*rxF[9])>>15);
|
|
ch[9] = (short)(((int)pil[4]*rxF[9] + (int)pil[5]*rxF[8])>>15);
|
|
ch[10] = ch[8]>>1;
|
|
ch[11] = ch[9]>>1;
|
|
ch[6] += ch[10];
|
|
ch[7] += ch[11];
|
|
/* printf("rb %d: pil2 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[4],pil[5],rxF[8],rxF[9],ch[8],ch[9]);*/
|
|
// ------------------------4th pilot------------------------
|
|
ch[12] = (short)(((int)pil[6]*rxF[12] - (int)pil[7]*rxF[13])>>15);
|
|
ch[13] = (short)(((int)pil[6]*rxF[13] + (int)pil[7]*rxF[12])>>15);
|
|
ch[14] = ch[12]>>1;
|
|
ch[15] = ch[13]>>1;
|
|
ch[10] += ch[14];
|
|
ch[11] += ch[15];
|
|
/* printf("rb %d: pil3 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[6],pil[7],rxF[12],rxF[13],ch[12],ch[13]);*/
|
|
// ------------------------5th pilot------------------------
|
|
ch[16] = (short)(((int)pil[8]*rxF[16] - (int)pil[9]*rxF[17])>>15);
|
|
ch[17] = (short)(((int)pil[8]*rxF[17] + (int)pil[9]*rxF[16])>>15);
|
|
ch[18] = ch[16]>>1;
|
|
ch[19] = ch[17]>>1;
|
|
ch[14] += ch[18];
|
|
ch[15] += ch[19];
|
|
/* printf("rb %d: pil4 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[4],pil[5],rxF[16],rxF[17],ch[16],ch[17]);*/
|
|
// ------------------------6th pilot------------------------
|
|
ch[20] = (short)(((int)pil[10]*rxF[20] - (int)pil[11]*rxF[21])>>15);
|
|
ch[21] = (short)(((int)pil[10]*rxF[21] + (int)pil[11]*rxF[20])>>15);
|
|
ch[18] += ch[20]>>1;
|
|
ch[19] += ch[21]>>1;
|
|
/* printf("rb %d: pil5 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[10],pil[11],rxF[20],rxF[21],ch[20],ch[21]); */
|
|
}
|
|
|
|
//**********************************************************************
|
|
// for l=2 and l=10
|
|
if (l!=6) {
|
|
// extrapolate last channel estimate
|
|
for (rb=0; rb<12; rb++) {
|
|
// ------------------------1st pilot---------------------------
|
|
ch[0] = (short)(((int)pil[0]*rxF[0] - (int)pil[1]*rxF[1])>>15);
|
|
ch[1] = (short)(((int)pil[0]*rxF[1] + (int)pil[1]*rxF[0])>>15);
|
|
ch[2] = ch[0]>>1;
|
|
ch[3] = ch[1]>>1;
|
|
ch[-2] += ch[2];
|
|
ch[-1] += ch[3];
|
|
/* printf("rb %d: pil0 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
rb,pil[0],pil[1],rxF[0],rxF[1],ch[0],ch[1]);*/
|
|
// ------------------------2nd pilot------------------------
|
|
ch[4] = (short)(((int)pil[2]*rxF[4] - (int)pil[3]*rxF[5])>>15);
|
|
ch[5] = (short)(((int)pil[2]*rxF[5] + (int)pil[3]*rxF[4])>>15);
|
|
ch[6] = ch[4]>>1;
|
|
ch[7] = ch[5]>>1;
|
|
ch[2] += ch[6];
|
|
ch[3] += ch[7];
|
|
/* printf("rb %d: pil1 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
rb,pil[2],pil[3],rxF[4],rxF[5],ch[4],ch[5]);*/
|
|
// ------------------------3rd pilot------------------------
|
|
ch[8] = (short)(((int)pil[4]*rxF[8] - (int)pil[5]*rxF[9])>>15);
|
|
ch[9] = (short)(((int)pil[4]*rxF[9] + (int)pil[5]*rxF[8])>>15);
|
|
ch[10] = ch[8]>>1;
|
|
ch[11] = ch[9]>>1;
|
|
ch[6] += ch[10];
|
|
ch[7] += ch[11];
|
|
/* printf("rb %d: pil2 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
rb,pil[4],pil[5],rxF[8],rxF[9],ch[8],ch[9]);*/
|
|
|
|
// ------------------------4th pilot------------------------
|
|
ch[12] = (short)(((int)pil[6]*rxF[12] - (int)pil[7]*rxF[13])>>15);
|
|
ch[13] = (short)(((int)pil[6]*rxF[13] + (int)pil[7]*rxF[12])>>15);
|
|
ch[14] = ch[12]>>1;
|
|
ch[15] = ch[13]>>1;
|
|
ch[10] += ch[14];
|
|
ch[11] += ch[15];
|
|
/* printf("rb %d: pil3 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
rb,pil[6],pil[7],rxF[12],rxF[13],ch[12],ch[13]);*/
|
|
// ------------------------5th pilot------------------------
|
|
ch[16] = (short)(((int)pil[8]*rxF[16] - (int)pil[9]*rxF[17])>>15);
|
|
ch[17] = (short)(((int)pil[8]*rxF[17] + (int)pil[9]*rxF[16])>>15);
|
|
ch[18] = ch[16]>>1;
|
|
ch[19] = ch[17]>>1;
|
|
ch[14] += ch[18];
|
|
ch[15] += ch[19];
|
|
/* printf("rb %d: pil4 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
rb,pil[4],pil[5],rxF[32],rxF[33],ch[16],ch[17]);*/
|
|
// ------------------------6th pilot------------------------
|
|
ch[20] = (short)(((int)pil[10]*rxF[20] - (int)pil[11]*rxF[21])>>15);
|
|
ch[21] = (short)(((int)pil[10]*rxF[21] + (int)pil[11]*rxF[20])>>15);
|
|
ch[22] = ch[20]>>1;
|
|
ch[23] = ch[21]>>1;
|
|
ch[18] += ch[22];
|
|
ch[19] += ch[23];
|
|
/* printf("rb %d: pil5 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
rb,pil[10],pil[11],rxF[20],rxF[21],ch[20],ch[21]);*/
|
|
pil+=12;
|
|
ch+=24;
|
|
rxF+=24;
|
|
}
|
|
|
|
// ------------------------middle PRB--------------------------
|
|
// ------------------------1st pilot---------------------------
|
|
|
|
ch[0] = (short)(((int)pil[0]*rxF[0] - (int)pil[1]*rxF[1])>>15);
|
|
ch[1] = (short)(((int)pil[0]*rxF[1] + (int)pil[1]*rxF[0])>>15);
|
|
ch[2] = ch[0]>>1;
|
|
ch[3] = ch[1]>>1;
|
|
/* printf("rb %d: pil0 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
rb,pil[0],pil[1],rxF[0],rxF[1],ch[0],ch[1]);*/
|
|
ch[-2] += ch[2];
|
|
ch[-1] += ch[3];
|
|
// ------------------------2nd pilot------------------------
|
|
ch[4] = (short)(((int)pil[2]*rxF[4] - (int)pil[3]*rxF[5])>>15);
|
|
ch[5] = (short)(((int)pil[2]*rxF[5] + (int)pil[3]*rxF[4])>>15);
|
|
ch[6] = ch[4]>>1;
|
|
ch[7] = ch[5]>>1;
|
|
ch[2] += ch[6];
|
|
ch[3] += ch[7];
|
|
/* printf("rb %d: pil1 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
rb,pil[2],pil[3],rxF[4],rxF[5],ch[4],ch[5]);*/
|
|
// ------------------------3rd pilot------------------------
|
|
ch[8] = (short)(((int)pil[4]*rxF[8] - (int)pil[5]*rxF[9])>>15);
|
|
ch[9] = (short)(((int)pil[4]*rxF[9] + (int)pil[5]*rxF[8])>>15);
|
|
ch[10] = ch[8]>>1;
|
|
ch[11] = ch[9]>>1;
|
|
ch[6] += ch[10];
|
|
ch[7] += ch[11];
|
|
/* printf("rb %d: pil2 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
rb,pil[4],pil[5],rxF[8],rxF[9],ch[8],ch[9]);*/
|
|
// printf("Second half\n");
|
|
|
|
// ------------------------Second half of RBs---------------------//
|
|
rxF = (short *)&rxdataF[aarx][((symbol_offset+1))];
|
|
// ---------------------------------------------------------------//
|
|
// ------------------------4th pilot------------------------
|
|
ch[12] = (short)(((int)pil[6]*rxF[0] - (int)pil[7]*rxF[1])>>15);
|
|
ch[13] = (short)(((int)pil[6]*rxF[1] + (int)pil[7]*rxF[0])>>15);
|
|
ch[14] = ch[12]>>1;
|
|
ch[15] = ch[13]>>1;
|
|
ch[10] = (ch[12]/3)+(ch[8]<<1)/3;
|
|
ch[11] = (ch[13]/3)+(ch[9]<<1)/3;
|
|
/* printf("rb %d: pil3 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
rb,pil[6],pil[7],rxF[0],rxF[1],ch[12],ch[13]);*/
|
|
// ------------------------5th pilot------------------------
|
|
ch[16] = (short)(((int)pil[8]*rxF[4] - (int)pil[9]*rxF[5])>>15);
|
|
ch[17] = (short)(((int)pil[8]*rxF[5] + (int)pil[9]*rxF[4])>>15);
|
|
ch[18] = ch[16]>>1;
|
|
ch[19] = ch[17]>>1;
|
|
ch[14] += ch[18];
|
|
ch[15] += ch[19];
|
|
/* printf("rb %d: pil4 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
rb,pil[4],pil[5],rxF[4],rxF[5],ch[8],ch[17]);*/
|
|
// ------------------------6th pilot------------------------
|
|
ch[20] = (short)(((int)pil[10]*rxF[8] - (int)pil[11]*rxF[9])>>15);
|
|
ch[21] = (short)(((int)pil[10]*rxF[9] + (int)pil[11]*rxF[8])>>15);
|
|
ch[22] = ch[20]>>1;
|
|
ch[23] = ch[21]>>1;
|
|
ch[18] += ch[22];
|
|
ch[19] += ch[23];
|
|
/* printf("rb %d: pil5 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
rb,pil[10],pil[11],rxF[8],rxF[9],ch[20],ch[21]);*/
|
|
pil+=12;
|
|
ch+=24;
|
|
rxF+=12;
|
|
|
|
// ________________________Second half of RBs____________________
|
|
for (rb=0; rb<11; rb++) {
|
|
// ------------------------1st pilot---------------------------
|
|
ch[0] = (short)(((int)pil[0]*rxF[0] - (int)pil[1]*rxF[1])>>15);
|
|
ch[1] = (short)(((int)pil[0]*rxF[1] + (int)pil[1]*rxF[0])>>15);
|
|
ch[2] = ch[0]>>1;
|
|
ch[3] = ch[1]>>1;
|
|
ch[-2] += ch[2];
|
|
ch[-1] += ch[3];
|
|
|
|
/* printf("rb %d: pil0 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[0],pil[1],rxF[0],rxF[1],ch[0],ch[1]);*/
|
|
// ------------------------2nd pilot------------------------
|
|
ch[4] = (short)(((int)pil[2]*rxF[4] - (int)pil[3]*rxF[5])>>15);
|
|
ch[5] = (short)(((int)pil[2]*rxF[5] + (int)pil[3]*rxF[4])>>15);
|
|
ch[6] = ch[4]>>1;
|
|
ch[7] = ch[5]>>1;
|
|
ch[2] += ch[6];
|
|
ch[3] += ch[7];
|
|
/* printf("rb %d: pil1 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[2],pil[3],rxF[4],rxF[5],ch[4],ch[5]); */
|
|
// ------------------------3rd pilot------------------------
|
|
ch[8] = (short)(((int)pil[4]*rxF[8] - (int)pil[5]*rxF[9])>>15);
|
|
ch[9] = (short)(((int)pil[4]*rxF[9] + (int)pil[5]*rxF[8])>>15);
|
|
ch[10] = ch[8]>>1;
|
|
ch[11] = ch[9]>>1;
|
|
ch[6] += ch[10];
|
|
ch[7] += ch[11];
|
|
/* printf("rb %d: pil2 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[4],pil[5],rxF[8],rxF[9],ch[8],ch[9]);*/
|
|
// ------------------------4th pilot------------------------
|
|
ch[12] = (short)(((int)pil[6]*rxF[12] - (int)pil[7]*rxF[13])>>15);
|
|
ch[13] = (short)(((int)pil[6]*rxF[13] + (int)pil[7]*rxF[12])>>15);
|
|
ch[14] = ch[12]>>1;
|
|
ch[15] = ch[13]>>1;
|
|
ch[10] += ch[14];
|
|
ch[11] += ch[15];
|
|
/* printf("rb %d: pil3 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[6],pil[7],rxF[12],rxF[13],ch[12],ch[13]);*/
|
|
// ------------------------5th pilot------------------------
|
|
ch[16] = (short)(((int)pil[8]*rxF[16] - (int)pil[9]*rxF[17])>>15);
|
|
ch[17] = (short)(((int)pil[8]*rxF[17] + (int)pil[9]*rxF[16])>>15);
|
|
ch[18] = ch[16]>>1;
|
|
ch[19] = ch[17]>>1;
|
|
ch[14] += ch[18];
|
|
ch[15] += ch[19];
|
|
/* printf("rb %d: pil4 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[4],pil[5],rxF[16],rxF[17],ch[16],ch[17]);*/
|
|
// ------------------------6th pilot------------------------
|
|
ch[20] = (short)(((int)pil[10]*rxF[20] - (int)pil[11]*rxF[21])>>15);
|
|
ch[21] = (short)(((int)pil[10]*rxF[21] + (int)pil[11]*rxF[20])>>15);
|
|
ch[22] = ch[20]>>1;
|
|
ch[23] = ch[21]>>1;
|
|
ch[18] += ch[22];
|
|
ch[19] += ch[23];
|
|
/* printf("rb %d: pil5 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[10],pil[11],rxF[20],rxF[21],ch[20],ch[21]);*/
|
|
pil+=12;
|
|
ch+=24;
|
|
rxF+=24;
|
|
}
|
|
|
|
// ------------------------Last PRB ---------------------------
|
|
// ------------------------1st pilot---------------------------
|
|
ch[0] = (short)(((int)pil[0]*rxF[0] - (int)pil[1]*rxF[1])>>15);
|
|
ch[1] = (short)(((int)pil[0]*rxF[1] + (int)pil[1]*rxF[0])>>15);
|
|
ch[2] = ch[0]>>1;
|
|
ch[3] = ch[1]>>1;
|
|
ch[-2] += ch[2];
|
|
ch[-1] += ch[3];
|
|
/* printf("rb %d: pil0 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[0],pil[1],rxF[0],rxF[1],ch[0],ch[1]);*/
|
|
// ------------------------2nd pilot------------------------
|
|
ch[4] = (short)(((int)pil[2]*rxF[4] - (int)pil[3]*rxF[5])>>15);
|
|
ch[5] = (short)(((int)pil[2]*rxF[5] + (int)pil[3]*rxF[4])>>15);
|
|
ch[6] = ch[4]>>1;
|
|
ch[7] = ch[5]>>1;
|
|
ch[2] += ch[6];
|
|
ch[3] += ch[7];
|
|
/* printf("rb %d: pil1 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[2],pil[3],rxF[4],rxF[5],ch[4],ch[5]); */
|
|
// ------------------------3rd pilot------------------------
|
|
ch[8] = (short)(((int)pil[4]*rxF[8] - (int)pil[5]*rxF[9])>>15);
|
|
ch[9] = (short)(((int)pil[4]*rxF[9] + (int)pil[5]*rxF[8])>>15);
|
|
ch[10] = ch[8]>>1;
|
|
ch[11] = ch[9]>>1;
|
|
ch[6] += ch[10];
|
|
ch[7] += ch[11];
|
|
/* printf("rb %d: pil2 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[4],pil[5],rxF[8],rxF[9],ch[8],ch[9]);*/
|
|
// ------------------------4th pilot------------------------
|
|
ch[12] = (short)(((int)pil[6]*rxF[12] - (int)pil[7]*rxF[13])>>15);
|
|
ch[13] = (short)(((int)pil[6]*rxF[13] + (int)pil[7]*rxF[12])>>15);
|
|
ch[14] = ch[12]>>1;
|
|
ch[15] = ch[13]>>1;
|
|
ch[10] += ch[14];
|
|
ch[11] += ch[15];
|
|
/* printf("rb %d: pil3 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[6],pil[7],rxF[12],rxF[13],ch[12],ch[13]);*/
|
|
// ------------------------5th pilot------------------------
|
|
ch[16] = (short)(((int)pil[8]*rxF[16] - (int)pil[9]*rxF[17])>>15);
|
|
ch[17] = (short)(((int)pil[8]*rxF[17] + (int)pil[9]*rxF[16])>>15);
|
|
ch[18] = ch[16]>>1;
|
|
ch[19] = ch[17]>>1;
|
|
ch[14] += ch[18];
|
|
ch[15] += ch[19];
|
|
/* printf("rb %d: pil4 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[4],pil[5],rxF[16],rxF[17],ch[16],ch[17]);*/
|
|
// ------------------------6th pilot------------------------
|
|
ch[20] = (short)(((int)pil[10]*rxF[20] - (int)pil[11]*rxF[21])>>15);
|
|
ch[21] = (short)(((int)pil[10]*rxF[21] + (int)pil[11]*rxF[20])>>15);
|
|
ch[22]= (ch[20]>>1)*3- ch[18];
|
|
ch[23]= (ch[21]>>1)*3- ch[19];
|
|
ch[18] += ch[20]>>1;
|
|
ch[19] += ch[21]>>1;
|
|
/* printf("rb %d: pil5 (%d,%d) x (%d,%d) = (%d,%d)\n",
|
|
13+rb,pil[10],pil[11],rxF[20],rxF[21],ch[20],ch[21]);*/
|
|
}
|
|
}
|
|
|
|
//------------------------Temporal Interpolation ------------------------------
|
|
if (l==6) {
|
|
ch = (short *)&dl_ch_estimates[aarx][ch_offset];
|
|
// printf("Interpolating ch 2,6 => %d\n",ch_offset);
|
|
ch_prev = (short *)&dl_ch_estimates[aarx][2*(ue->frame_parms.ofdm_symbol_size)];
|
|
ch0 = (short *)&dl_ch_estimates[aarx][0*(ue->frame_parms.ofdm_symbol_size)];
|
|
memcpy(ch0,ch_prev,4*ue->frame_parms.ofdm_symbol_size);
|
|
|
|
ch1 = (short *)&dl_ch_estimates[aarx][1*(ue->frame_parms.ofdm_symbol_size)];
|
|
memcpy(ch1,ch_prev,4*ue->frame_parms.ofdm_symbol_size);
|
|
|
|
// 3/4 ch2 + 1/4 ch6 => ch3
|
|
multadd_complex_vector_real_scalar(ch_prev,24576,ch_prev+(2*(ue->frame_parms.ofdm_symbol_size)),1,ue->frame_parms.ofdm_symbol_size);
|
|
multadd_complex_vector_real_scalar(ch,8192,ch_prev+(2*(ue->frame_parms.ofdm_symbol_size)),0,ue->frame_parms.ofdm_symbol_size);
|
|
|
|
// 1/2 ch2 + 1/2 ch6 => ch4
|
|
multadd_complex_vector_real_scalar(ch_prev,16384,ch_prev+(4*(ue->frame_parms.ofdm_symbol_size)),1,ue->frame_parms.ofdm_symbol_size);
|
|
multadd_complex_vector_real_scalar(ch,16384,ch_prev+(4*(ue->frame_parms.ofdm_symbol_size)),0,ue->frame_parms.ofdm_symbol_size);
|
|
// 1/4 ch2 + 3/4 ch6 => ch5
|
|
multadd_complex_vector_real_scalar(ch_prev,8192,ch_prev+(6*((ue->frame_parms.ofdm_symbol_size))),1,ue->frame_parms.ofdm_symbol_size);
|
|
multadd_complex_vector_real_scalar(ch,24576,ch_prev+(6*((ue->frame_parms.ofdm_symbol_size))),0,ue->frame_parms.ofdm_symbol_size);
|
|
}
|
|
|
|
if (l==10) {
|
|
ch = (short *)&dl_ch_estimates[aarx][ch_offset];
|
|
ch_prev = (short *)&dl_ch_estimates[aarx][6*(ue->frame_parms.ofdm_symbol_size)];
|
|
// 3/4 ch6 + 1/4 ch10 => ch7
|
|
multadd_complex_vector_real_scalar(ch_prev,24576,ch_prev+(2*(ue->frame_parms.ofdm_symbol_size)),1,ue->frame_parms.ofdm_symbol_size);
|
|
multadd_complex_vector_real_scalar(ch,8192,ch_prev+(2*(ue->frame_parms.ofdm_symbol_size)),0,ue->frame_parms.ofdm_symbol_size);
|
|
// 1/2 ch6 + 1/2 ch10 => ch8
|
|
multadd_complex_vector_real_scalar(ch_prev,16384,ch_prev+(4*(ue->frame_parms.ofdm_symbol_size)),1,ue->frame_parms.ofdm_symbol_size);
|
|
multadd_complex_vector_real_scalar(ch,16384,ch_prev+(4*(ue->frame_parms.ofdm_symbol_size)),0,ue->frame_parms.ofdm_symbol_size);
|
|
// 1/4 ch6 + 3/4 ch10 => ch9
|
|
multadd_complex_vector_real_scalar(ch_prev,8192,ch_prev+(6*((ue->frame_parms.ofdm_symbol_size))),1,ue->frame_parms.ofdm_symbol_size);
|
|
multadd_complex_vector_real_scalar(ch,24576,ch_prev+(6*((ue->frame_parms.ofdm_symbol_size))),0,ue->frame_parms.ofdm_symbol_size);
|
|
// 5/4 ch10 - 1/4 ch6 => ch11
|
|
// Ch11
|
|
ch_prev = (short *)&dl_ch_estimates[aarx][10*(ue->frame_parms.ofdm_symbol_size)];
|
|
ch11 = (short *)&dl_ch_estimates[aarx][11*(ue->frame_parms.ofdm_symbol_size)];
|
|
memcpy(ch11,ch_prev,4*ue->frame_parms.ofdm_symbol_size);
|
|
}
|
|
}
|
|
|
|
// do ifft of channel estimate
|
|
for (aa=0; aa<ue->frame_parms.nb_antennas_rx*ue->frame_parms.nb_antennas_tx; aa++) {
|
|
if (ue->common_vars.common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates[eNB_offset][aa]) {
|
|
switch (ue->frame_parms.N_RB_DL) {
|
|
case 6:
|
|
idft128((int16_t*) &ue->common_vars.common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates[eNB_offset][aa][8],
|
|
(int16_t*) ue->common_vars.common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates_time[eNB_offset][aa],
|
|
1);
|
|
break;
|
|
case 25:
|
|
idft512((int16_t*) &ue->common_vars.common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates[eNB_offset][aa][8],
|
|
(int16_t*) ue->common_vars.common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates_time[eNB_offset][aa],
|
|
1);
|
|
break;
|
|
case 50:
|
|
idft1024((int16_t*) &ue->common_vars.common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates[eNB_offset][aa][8],
|
|
(int16_t*) ue->common_vars.common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates_time[eNB_offset][aa],
|
|
1);
|
|
break;
|
|
case 75:
|
|
idft1536((int16_t*) &ue->common_vars.common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates[eNB_offset][aa][8],
|
|
(int16_t*) ue->common_vars.common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates_time[eNB_offset][aa],
|
|
1);
|
|
break;
|
|
case 100:
|
|
idft2048((int16_t*) &ue->common_vars.common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates[eNB_offset][aa][8],
|
|
(int16_t*) ue->common_vars.common_vars_rx_data_per_thread[ue->current_thread_id[subframe]].dl_ch_estimates_time[eNB_offset][aa],
|
|
1);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return(0);
|
|
}
|
|
|