Javier Morgade
58bd55b9b3
-Increase buffer size in PHY_ofdm_mod to accomodate FeMBMS sizes -New FFT sizes added (IDFT_12288, IDFT_24576) to enable support for FeMBMS 10MHz and 20MHz channels BWs Signed-off-by: Javier Morgade <javier.morgade@ieee.org>
366 lines
12 KiB
C
366 lines
12 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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/*
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* @defgroup _PHY_MODULATION_
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* @ingroup _physical_layer_ref_implementation_
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* @{
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\section _phy_modulation_ OFDM Modulation Blocks
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This section deals with basic functions for OFDM Modulation.
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*/
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#include "PHY/defs_eNB.h"
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#include "PHY/defs_gNB.h"
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#include "PHY/impl_defs_top.h"
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#include "common/utils/LOG/log.h"
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#include "common/utils/LOG/vcd_signal_dumper.h"
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#include "modulation_common.h"
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#include "PHY/LTE_TRANSPORT/transport_common_proto.h"
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//#define DEBUG_OFDM_MOD
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void normal_prefix_mod(int32_t *txdataF,int32_t *txdata,uint8_t nsymb,LTE_DL_FRAME_PARMS *frame_parms)
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{
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PHY_ofdm_mod(txdataF, // input
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txdata, // output
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frame_parms->ofdm_symbol_size,
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1, // number of symbols
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frame_parms->nb_prefix_samples0, // number of prefix samples
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CYCLIC_PREFIX);
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PHY_ofdm_mod(txdataF+frame_parms->ofdm_symbol_size, // input
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txdata+OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES0, // output
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frame_parms->ofdm_symbol_size,
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nsymb-1,
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frame_parms->nb_prefix_samples, // number of prefix samples
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CYCLIC_PREFIX);
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}
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void nr_normal_prefix_mod(int32_t *txdataF,int32_t *txdata,uint8_t nsymb,NR_DL_FRAME_PARMS *frame_parms)
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{
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PHY_ofdm_mod(txdataF, // input
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txdata, // output
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frame_parms->ofdm_symbol_size,
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1, // number of symbols
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frame_parms->nb_prefix_samples0, // number of prefix samples
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CYCLIC_PREFIX);
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PHY_ofdm_mod(txdataF+frame_parms->ofdm_symbol_size, // input
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txdata + frame_parms->ofdm_symbol_size + frame_parms->nb_prefix_samples0, // output
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frame_parms->ofdm_symbol_size,
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nsymb - 1,
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frame_parms->nb_prefix_samples, // number of prefix samples
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CYCLIC_PREFIX);
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}
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void PHY_ofdm_mod(int *input, /// pointer to complex input
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int *output, /// pointer to complex output
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int fftsize, /// FFT_SIZE
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unsigned char nb_symbols, /// number of OFDM symbols
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unsigned short nb_prefix_samples, /// cyclic prefix length
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Extension_t etype /// type of extension
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)
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{
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if(nb_symbols == 0) return;
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short temp[2*2*6144*4] __attribute__((aligned(32)));
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unsigned short i,j;
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short k;
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volatile int *output_ptr=(int*)0;
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int *temp_ptr=(int*)0;
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idft_size_idx_t idftsize;
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switch (fftsize) {
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case 128:
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idftsize = IDFT_128;
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break;
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case 256:
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idftsize = IDFT_256;
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break;
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case 512:
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idftsize = IDFT_512;
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break;
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case 1024:
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idftsize = IDFT_1024;
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break;
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case 1536:
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idftsize = IDFT_1536;
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break;
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case 2048:
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idftsize = IDFT_2048;
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break;
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case 3072:
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idftsize = IDFT_3072;
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break;
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case 4096:
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idftsize = IDFT_4096;
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break;
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case 6144:
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idftsize= IDFT_6144;
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break;
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case 12288:
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idftsize= IDFT_12288;
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break;
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case 24576:
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idftsize= IDFT_24576;
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break;
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default:
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idftsize = IDFT_512;
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break;
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}
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#ifdef DEBUG_OFDM_MOD
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printf("[PHY] OFDM mod (size %d,prefix %d) Symbols %d, input %p, output %p\n",
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fftsize,nb_prefix_samples,nb_symbols,input,output);
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#endif
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for (i=0; i<nb_symbols; i++) {
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#ifdef DEBUG_OFDM_MOD
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printf("[PHY] symbol %d/%d offset %d (%p,%p -> %p)\n",i,nb_symbols,i*fftsize+(i*nb_prefix_samples),input,&input[i*fftsize],&output[(i*fftsize) + ((i)*nb_prefix_samples)]);
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#endif
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#ifndef __AVX2__
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// handle 128-bit alignment for 128-bit SIMD (SSE4,NEON,AltiVEC)
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idft(idftsize,(int16_t *)&input[i*fftsize],
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(fftsize==128) ? (int16_t *)temp : (int16_t *)&output[(i*fftsize) + ((1+i)*nb_prefix_samples)],
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1);
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#else
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// on AVX2 need 256-bit alignment
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idft(idftsize,(int16_t *)&input[i*fftsize],
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(int16_t *)temp,
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1);
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#endif
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// Copy to frame buffer with Cyclic Extension
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// Note: will have to adjust for synchronization offset!
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switch (etype) {
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case CYCLIC_PREFIX:
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output_ptr = &output[(i*fftsize) + ((1+i)*nb_prefix_samples)];
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temp_ptr = (int *)temp;
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// msg("Doing cyclic prefix method\n");
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#ifndef __AVX2__
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if (fftsize==128)
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#endif
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{
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/*for (j=0; j<fftsize ; j++) {
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output_ptr[j] = temp_ptr[j];
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}*/
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memcpy((void*)output_ptr,(void*)temp_ptr,fftsize<<2);
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}
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j=fftsize;
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for (k=-1; k>=-nb_prefix_samples; k--) {
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output_ptr[k] = output_ptr[--j];
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}
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break;
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case CYCLIC_SUFFIX:
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output_ptr = &output[(i*fftsize)+ (i*nb_prefix_samples)];
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temp_ptr = (int *)temp;
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// msg("Doing cyclic suffix method\n");
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for (j=0; j<fftsize ; j++) {
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output_ptr[j] = temp_ptr[2*j];
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}
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for (j=0; j<nb_prefix_samples; j++)
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output_ptr[fftsize+j] = output_ptr[j];
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break;
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case ZEROS:
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break;
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case NONE:
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// msg("NO EXTENSION!\n");
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output_ptr = &output[fftsize];
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temp_ptr = (int *)temp;
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for (j=0; j<fftsize ; j++) {
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output_ptr[j] = temp_ptr[2*j];
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}
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break;
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default:
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break;
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}
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}
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}
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void do_OFDM_mod(int32_t **txdataF, int32_t **txdata, uint32_t frame,uint16_t next_slot, LTE_DL_FRAME_PARMS *frame_parms)
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{
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int aa, slot_offset, slot_offset_F;
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slot_offset_F = (next_slot)*(frame_parms->ofdm_symbol_size)*((frame_parms->Ncp==1) ? 6 : 7);
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slot_offset = (next_slot)*(frame_parms->samples_per_tti>>1);
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for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
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if (is_pmch_subframe(frame,next_slot>>1,frame_parms)) {
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if ((next_slot%2)==0) {
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LOG_D(PHY,"Frame %d, subframe %d: Doing MBSFN modulation (slot_offset %d)\n",frame,next_slot>>1,slot_offset);
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PHY_ofdm_mod(&txdataF[aa][slot_offset_F], // input
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&txdata[aa][slot_offset], // output
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frame_parms->ofdm_symbol_size,
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12, // number of symbols
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frame_parms->ofdm_symbol_size>>2, // number of prefix samples
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CYCLIC_PREFIX);
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if (frame_parms->Ncp == EXTENDED)
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PHY_ofdm_mod(&txdataF[aa][slot_offset_F], // input
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&txdata[aa][slot_offset], // output
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frame_parms->ofdm_symbol_size,
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2, // number of symbols
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frame_parms->nb_prefix_samples, // number of prefix samples
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CYCLIC_PREFIX);
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else {
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LOG_D(PHY,"Frame %d, subframe %d: Doing PDCCH modulation\n",frame,next_slot>>1);
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normal_prefix_mod(&txdataF[aa][slot_offset_F],
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&txdata[aa][slot_offset],
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2,
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frame_parms);
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}
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}
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} else {
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if (frame_parms->Ncp == EXTENDED)
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PHY_ofdm_mod(&txdataF[aa][slot_offset_F], // input
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&txdata[aa][slot_offset], // output
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frame_parms->ofdm_symbol_size,
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6, // number of symbols
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frame_parms->nb_prefix_samples, // number of prefix samples
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CYCLIC_PREFIX);
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else {
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normal_prefix_mod(&txdataF[aa][slot_offset_F],
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&txdata[aa][slot_offset],
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7,
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frame_parms);
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}
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}
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}
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}
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/*
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// OFDM modulation for each symbol
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void do_OFDM_mod_symbol(LTE_eNB_COMMON *eNB_common_vars, RU_COMMON *common, uint16_t next_slot, LTE_DL_FRAME_PARMS *frame_parms,int do_precoding)
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{
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int aa, l, slot_offset, slot_offsetF;
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int32_t **txdataF = eNB_common_vars->txdataF;
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int32_t **txdataF_BF = common->txdataF_BF;
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int32_t **txdata = common->txdata;
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slot_offset = (next_slot)*(frame_parms->samples_per_tti>>1);
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slot_offsetF = (next_slot)*(frame_parms->ofdm_symbol_size)*((frame_parms->Ncp==EXTENDED) ? 6 : 7);
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//printf("Thread %d starting ... aa %d (%llu)\n",omp_get_thread_num(),aa,rdtsc());
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for (l=0; l<frame_parms->symbols_per_tti>>1; l++) {
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for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
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//printf("do_OFDM_mod_l, slot=%d, l=%d, NUMBER_OF_OFDM_CARRIERS=%d,OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES=%d\n",next_slot, l,NUMBER_OF_OFDM_CARRIERS,OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES);
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VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_ENB_BEAM_PRECODING,1);
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if (do_precoding==1) beam_precoding(txdataF,txdataF_BF,frame_parms,eNB_common_vars->beam_weights,next_slot,l,aa);
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VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_ENB_BEAM_PRECODING,0);
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//PMCH case not implemented...
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if (frame_parms->Ncp == EXTENDED)
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PHY_ofdm_mod((do_precoding == 1)?txdataF_BF[aa]:&txdataF[aa][slot_offsetF+l*frame_parms->ofdm_symbol_size], // input
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&txdata[aa][slot_offset+l*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES], // output
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frame_parms->ofdm_symbol_size,
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1, // number of symbols
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frame_parms->nb_prefix_samples, // number of prefix samples
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CYCLIC_PREFIX);
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else {
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if (l==0) {
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PHY_ofdm_mod((do_precoding==1)?txdataF_BF[aa]:&txdataF[aa][slot_offsetF+l*frame_parms->ofdm_symbol_size], // input
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&txdata[aa][slot_offset], // output
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frame_parms->ofdm_symbol_size,
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1, // number of symbols
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frame_parms->nb_prefix_samples0, // number of prefix samples
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CYCLIC_PREFIX);
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} else {
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PHY_ofdm_mod((do_precoding==1)?txdataF_BF[aa]:&txdataF[aa][slot_offsetF+l*frame_parms->ofdm_symbol_size], // input
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&txdata[aa][slot_offset+OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES0+(l-1)*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES], // output
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frame_parms->ofdm_symbol_size,
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1, // number of symbols
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frame_parms->nb_prefix_samples, // number of prefix samples
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CYCLIC_PREFIX);
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//printf("txdata[%d][%d]=%d\n",aa,slot_offset+OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES0+(l-1)*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES,txdata[aa][slot_offset+OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES0+(l-1)*OFDM_SYMBOL_SIZE_COMPLEX_SAMPLES]);
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}
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}
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}
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}
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}
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*/
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