179 lines
7.0 KiB
C
179 lines
7.0 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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/*! \file PHY/MODULATION/beamforming.c
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* \brief
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* \author X. JIANG, F. Kaltenberger, R. KNOPP
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* \date 2016
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* \version 0.1
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* \company Eurecom
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* \email: xiwen.jiang@eurecom.fr,florian.kaltenberger@eurecom.fr,raymond.knopp@eurecom.fr
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* \note
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* \warning
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*/
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/*! \function beam_precoding_one_eNB
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* \brief Create and Implementation of beamforming in one eNB
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* \author TY Hsu, SY Yeh(fdragon), TH Wang(Judy)
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* \date 2018
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* \version 0.1
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* \company ISIP@NCTU and Eurecom
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* \email: tyhsu@cs.nctu.edu.tw,fdragon.cs96g@g2.nctu.edu.tw,Tsu-Han.Wang@eurecom.fr
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* \note
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* \warning
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*/
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#include "PHY/defs_common.h"
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#include "PHY/defs_eNB.h"
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#include "PHY/CODING/coding_defs.h"
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#include "PHY/CODING/coding_extern.h"
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#include "PHY/CODING/lte_interleaver_inline.h"
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#include "PHY/LTE_TRANSPORT/transport_eNB.h"
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#include "modulation_eNB.h"
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#include "nr_modulation.h"
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#include "common/utils/LOG/vcd_signal_dumper.h"
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#include "PHY/NR_TRANSPORT/nr_antenna_state.h"
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int beam_precoding(int32_t **txdataF,
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int32_t **txdataF_BF,
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int subframe,
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LTE_DL_FRAME_PARMS *frame_parms,
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int32_t **beam_weights[NUMBER_OF_eNB_MAX+1][15],
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int symbol,
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int aa,
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int p,
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int l1_id)
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{
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int rb_offset_neg0 = frame_parms->ofdm_symbol_size - (6*frame_parms->N_RB_DL);
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int rb_offset_neg = (subframe*frame_parms->ofdm_symbol_size*frame_parms->symbols_per_tti) + rb_offset_neg0;
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int rb_offset_pos = (subframe*frame_parms->ofdm_symbol_size*frame_parms->symbols_per_tti);
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multadd_cpx_vector((c16_t *)&txdataF[p][rb_offset_neg + (symbol * frame_parms->ofdm_symbol_size)],
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(c16_t *)&beam_weights[l1_id][p][aa][rb_offset_neg0],
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(c16_t *)&txdataF_BF[aa][rb_offset_neg0 + (symbol * frame_parms->ofdm_symbol_size)],
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6 * frame_parms->N_RB_DL,
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15);
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multadd_cpx_vector(
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(c16_t *)&txdataF[p][rb_offset_pos + (symbol * frame_parms->ofdm_symbol_size)],
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(c16_t *)&beam_weights[l1_id][p][aa][0],
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(c16_t *)&txdataF_BF[aa][(symbol * frame_parms->ofdm_symbol_size)],
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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)
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15);
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return 0;
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}
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int beam_precoding_one_eNB(int32_t **txdataF,
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int32_t **txdataF_BF,
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int32_t **beam_weights[NUMBER_OF_eNB_MAX+1][15],
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int subframe,
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int nb_antenna_ports,
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int nb_tx, // total physical antenna
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LTE_DL_FRAME_PARMS *frame_parms
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)
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{
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int p, symbol, aa; // loop index
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int re_offset;
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int ofdm_symbol_size = frame_parms->ofdm_symbol_size;
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int symbols_per_tti = frame_parms->symbols_per_tti;
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int nb_antenna_ports_eNB = frame_parms->nb_antenna_ports_eNB; // logic antenna ports
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re_offset = ofdm_symbol_size*symbols_per_tti*subframe;
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// txdataF_BF[aa][re] = sum(beam_weghts[p][aa][re]*txdataF[p][re]), p=0~nb_antenna_ports-1
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// real part and image part need to compute separately
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for (aa=0; aa<nb_tx; aa++) {
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memset(txdataF_BF[aa],0,sizeof(int32_t)*(ofdm_symbol_size*symbols_per_tti));
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for(p=0;p<nb_antenna_ports;p++){
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if (p<nb_antenna_ports_eNB || p==5){
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for (symbol=0; symbol<symbols_per_tti; symbol++){
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multadd_cpx_vector((c16_t *)&txdataF[p][symbol * ofdm_symbol_size + re_offset],
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(c16_t *)beam_weights[0][p][aa],
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(c16_t *)&txdataF_BF[aa][symbol * ofdm_symbol_size],
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ofdm_symbol_size,
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15);
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}
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}
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}
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}
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return 0;
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}
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void nr_beam_precoding(c16_t **txdataF,
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c16_t **txdataF_BF,
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NR_DL_FRAME_PARMS *frame_parms,
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int32_t ***beam_weights,
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int slot,
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int symbol,
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int aa,
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int nb_antenna_ports,
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int offset)
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{
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// clear txdata_BF[aa][re] for each call of ue_spec_beamforming
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memset(&txdataF_BF[aa][symbol*frame_parms->ofdm_symbol_size], 0, sizeof(c16_t) *(frame_parms->ofdm_symbol_size));
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for (int p = 0; p < nb_antenna_ports; p++) {
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multadd_cpx_vector((c16_t *)&txdataF[p][(symbol * frame_parms->ofdm_symbol_size) + offset],
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(c16_t *)beam_weights[p][aa],
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(c16_t *)&txdataF_BF[aa][symbol * frame_parms->ofdm_symbol_size],
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frame_parms->ofdm_symbol_size,
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15);
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}
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}
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void nr_beam_precoding_with_muting(c16_t **txdataF,
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c16_t **txdataF_BF,
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NR_DL_FRAME_PARMS *frame_parms,
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int32_t ***beam_weights,
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int slot,
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int symbol,
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int aa,
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int nb_antenna_ports,
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int offset,
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const nr_antenna_state_t *ant_state)
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{
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// Clear output buffer first
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memset(&txdataF_BF[aa][symbol * frame_parms->ofdm_symbol_size], 0,
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sizeof(c16_t) * frame_parms->ofdm_symbol_size);
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// O-RAN energy saving: skip precoding if antenna is muted
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// This implements transmission blanking per WG4 spec
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if (ant_state != NULL && !nr_is_tx_antenna_active(ant_state, aa)) {
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// Antenna is muted - output remains zero (transmission blank)
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LOG_D(PHY, "[ANTENNA_MUTE] Antenna %d muted, blanking transmission for symbol %d\n",
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aa, symbol);
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return;
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}
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// Normal precoding for active antennas
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for (int p = 0; p < nb_antenna_ports; p++) {
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multadd_cpx_vector((c16_t *)&txdataF[p][(symbol * frame_parms->ofdm_symbol_size) + offset],
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(c16_t *)beam_weights[p][aa],
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(c16_t *)&txdataF_BF[aa][symbol * frame_parms->ofdm_symbol_size],
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frame_parms->ofdm_symbol_size,
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15);
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}
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}
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