82 lines
3.0 KiB
C
82 lines
3.0 KiB
C
/*
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* SPDX-License-Identifier: LicenseRef-CSSL-1.0
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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 "common/utils/LOG/vcd_signal_dumper.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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