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openairinterface5g/openair1/PHY/MODULATION/beamforming.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
*/
/*! \file PHY/MODULATION/beamforming.c
* \brief
* \author X. JIANG, F. Kaltenberger, R. KNOPP
* \date 2016
* \version 0.1
* \company Eurecom
* \email: xiwen.jiang@eurecom.fr,florian.kaltenberger@eurecom.fr,raymond.knopp@eurecom.fr
* \note
* \warning
*/
/*! \function beam_precoding_one_eNB
* \brief Create and Implementation of beamforming in one eNB
* \author TY Hsu, SY Yeh(fdragon), TH Wang(Judy)
* \date 2018
* \version 0.1
* \company ISIP@NCTU and Eurecom
* \email: tyhsu@cs.nctu.edu.tw,fdragon.cs96g@g2.nctu.edu.tw,Tsu-Han.Wang@eurecom.fr
* \note
* \warning
*/
#include "PHY/defs_common.h"
#include "PHY/defs_eNB.h"
#include "PHY/phy_extern.h"
#include "PHY/CODING/coding_defs.h"
#include "PHY/CODING/coding_extern.h"
#include "PHY/CODING/lte_interleaver_inline.h"
#include "PHY/LTE_TRANSPORT/transport_eNB.h"
#include "modulation_eNB.h"
#include "nr_modulation.h"
#include "common/utils/LOG/vcd_signal_dumper.h"
int beam_precoding(int32_t **txdataF,
int32_t **txdataF_BF,
int subframe,
LTE_DL_FRAME_PARMS *frame_parms,
int32_t **beam_weights[NUMBER_OF_eNB_MAX+1][15],
int symbol,
int aa,
int p,
int l1_id)
{
int rb_offset_neg0 = frame_parms->ofdm_symbol_size - (6*frame_parms->N_RB_DL);
int rb_offset_neg = (subframe*frame_parms->ofdm_symbol_size*frame_parms->symbols_per_tti) + rb_offset_neg0;
int rb_offset_pos = (subframe*frame_parms->ofdm_symbol_size*frame_parms->symbols_per_tti);
multadd_cpx_vector((int16_t*)&txdataF[p][rb_offset_neg+(symbol*frame_parms->ofdm_symbol_size)],
(int16_t*)&beam_weights[l1_id][p][aa][rb_offset_neg0],
(int16_t*)&txdataF_BF[aa][rb_offset_neg0+(symbol*frame_parms->ofdm_symbol_size)],
0,
6*frame_parms->N_RB_DL,
15);
multadd_cpx_vector((int16_t*)&txdataF[p][rb_offset_pos+(symbol*frame_parms->ofdm_symbol_size)],
(int16_t*)&beam_weights[l1_id][p][aa][0],
(int16_t*)&txdataF_BF[aa][(symbol*frame_parms->ofdm_symbol_size)],
0,
7*frame_parms->N_RB_DL, // to allow for extra RE at the end, 12 useless multipy-adds (first one at DC and 11 at end)
15);
return 0;
}
int beam_precoding_one_eNB(int32_t **txdataF,
int32_t **txdataF_BF,
int32_t **beam_weights[NUMBER_OF_eNB_MAX+1][15],
int subframe,
int nb_antenna_ports,
int nb_tx, // total physical antenna
LTE_DL_FRAME_PARMS *frame_parms
)
{
int p, symbol, aa; // loop index
int re_offset;
int ofdm_symbol_size = frame_parms->ofdm_symbol_size;
int symbols_per_tti = frame_parms->symbols_per_tti;
int nb_antenna_ports_eNB = frame_parms->nb_antenna_ports_eNB; // logic antenna ports
re_offset = ofdm_symbol_size*symbols_per_tti*subframe;
// txdataF_BF[aa][re] = sum(beam_weghts[p][aa][re]*txdataF[p][re]), p=0~nb_antenna_ports-1
// real part and image part need to compute separately
for (aa=0; aa<nb_tx; aa++) {
memset(txdataF_BF[aa],0,sizeof(int32_t)*(ofdm_symbol_size*symbols_per_tti));
for(p=0;p<nb_antenna_ports;p++){
if (p<nb_antenna_ports_eNB || p==5){
for (symbol=0; symbol<symbols_per_tti; symbol++){
multadd_cpx_vector((int16_t*)&txdataF[p][symbol*ofdm_symbol_size+re_offset],
(int16_t*)beam_weights[0][p][aa],
(int16_t*)&txdataF_BF[aa][symbol*ofdm_symbol_size],
0,
ofdm_symbol_size,
15);
/*
for (re=0; re<ofdm_symbol_size; re++){
// direct
((int16_t*)&txdataF_BF[aa][re])[0] += (int16_t)((((int16_t*)&txdataF[p][re+symbol*ofdm_symbol_size+re_offset])[0]*((int16_t*)&beam_weights[p][aa][re])[0])>>15);
((int16_t*)&txdataF_BF[aa][re])[0] -= (int16_t)((((int16_t*)&txdataF[p][re+symbol*ofdm_symbol_size+re_offset])[1]*((int16_t*)&beam_weights[p][aa][re])[1])>>15);
((int16_t*)&txdataF_BF[aa][re])[1] += (int16_t)((((int16_t*)&txdataF[p][re+symbol*ofdm_symbol_size+re_offset])[0]*((int16_t*)&beam_weights[p][aa][re])[1])>>15);
((int16_t*)&txdataF_BF[aa][re])[1] += (int16_t)((((int16_t*)&txdataF[p][re+symbol*ofdm_symbol_size+re_offset])[1]*((int16_t*)&beam_weights[p][aa][re])[0])>>15);
}
*/
}
}
}
}
return 0;
}
int nr_beam_precoding(int32_t **txdataF,
int32_t **txdataF_BF,
NR_DL_FRAME_PARMS *frame_parms,
int32_t ***beam_weights,
int slot,
int symbol,
int aa,
int nb_antenna_ports,
int offset)
{
uint8_t p;
// clear txdata_BF[aa][re] for each call of ue_spec_beamforming
memset(&txdataF_BF[aa][symbol*frame_parms->ofdm_symbol_size],0,sizeof(int32_t)*(frame_parms->ofdm_symbol_size));
for (p=0; p<nb_antenna_ports; p++) {
//if ((frame_parms->L_ssb >> (63-p)) & 0x01) {
multadd_cpx_vector((int16_t*)&txdataF[p][(symbol*frame_parms->ofdm_symbol_size)+offset],
(int16_t*)beam_weights[p][aa],
(int16_t*)&txdataF_BF[aa][symbol*frame_parms->ofdm_symbol_size],
0,
frame_parms->ofdm_symbol_size,
15);
//}
}
return 0;
}
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