127 lines
4.2 KiB
C
127 lines
4.2 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 ldpc_encoder_optim.c
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* \brief Defines the optimized LDPC encoder
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* \author Florian Kaltenberger, Raymond Knopp, Kien le Trung (Eurecom)
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* \email openair_tech@eurecom.fr
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* \date 27-03-2018
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* \version 1.0
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* \note
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* \warning
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*/
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#include <stdlib.h>
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#include <math.h>
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#include <stdio.h>
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#include <string.h>
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#include "assertions.h"
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#include "common/utils/LOG/log.h"
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#include "time_meas.h"
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#include "openair1/PHY/CODING/nrLDPC_defs.h"
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#include "ldpc_encode_parity_check.c"
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#include "ldpc_generate_coefficient.c"
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int nrLDPC_encod(unsigned char **test_input,unsigned char **channel_input,int Zc,int Kb,short block_length, short BG, encoder_implemparams_t *impp)
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{
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short nrows=0,ncols=0;
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int rate=3;
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int no_punctured_columns,removed_bit;
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int simd_size;
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//determine number of bits in codeword
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//if (block_length>3840)
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if (BG==1)
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{
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//BG=1;
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nrows=46; //parity check bits
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ncols=22; //info bits
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rate=3;
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}
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//else if (block_length<=3840)
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else if (BG==2)
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{
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//BG=2;
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nrows=42; //parity check bits
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ncols=10; // info bits
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rate=5;
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}
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#ifdef DEBUG_LDPC
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LOG_D(PHY,"ldpc_encoder_optim_8seg: BG %d, Zc %d, Kb %d, block_length %d\n",BG,Zc,Kb,block_length);
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LOG_D(PHY,"ldpc_encoder_optim_8seg: PDU %x %x %x %x\n",test_input[0][0],test_input[0][1],test_input[0][2],test_input[0][3]);
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#endif
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if ((Zc&31) > 0) simd_size = 16;
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else simd_size = 32;
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unsigned char c[22*Zc] __attribute__((aligned(32))); //padded input, unpacked, max size
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unsigned char d[46*Zc] __attribute__((aligned(32))); //coded parity part output, unpacked, max size
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// calculate number of punctured bits
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no_punctured_columns=(int)((nrows-2)*Zc+block_length-block_length*rate)/Zc;
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removed_bit=(nrows-no_punctured_columns-2) * Zc+block_length-(int)(block_length*rate);
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// printf("%d\n",no_punctured_columns);
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// printf("%d\n",removed_bit);
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// unpack input
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memset(c,0,sizeof(unsigned char) * ncols * Zc);
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memset(d,0,sizeof(unsigned char) * nrows * Zc);
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if(impp->tinput != NULL) start_meas(impp->tinput);
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for (int i=0; i<block_length; i++) {
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c[i] = (test_input[0][i/8]&(128>>(i&7)))>>(7-(i&7));
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//printf("c(%d,%d)=%d\n",j,i,temp);
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}
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if(impp->tinput != NULL) stop_meas(impp->tinput);
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if ((BG==1 && Zc>=176) || (BG==2 && Zc>=64)) {
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// extend matrix
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if(impp->tprep != NULL) start_meas(impp->tprep);
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if(impp->tprep != NULL) stop_meas(impp->tprep);
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//parity check part
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if(impp->tparity != NULL) start_meas(impp->tparity);
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encode_parity_check_part_optim(c, d, BG, Zc, Kb,simd_size, ncols);
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if(impp->tparity != NULL) stop_meas(impp->tparity);
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}
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else {
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if (encode_parity_check_part_orig(c, d, BG, Zc, Kb, block_length)!=0) {
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printf("Problem with encoder\n");
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return(-1);
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}
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}
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if(impp->toutput != NULL) start_meas(impp->toutput);
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// information part and puncture columns
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memcpy(&channel_input[0][0], &c[2*Zc], (block_length-2*Zc)*sizeof(unsigned char));
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memcpy(&channel_input[0][block_length-2*Zc], &d[0], ((nrows-no_punctured_columns) * Zc-removed_bit)*sizeof(unsigned char));
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if(impp->toutput != NULL) stop_meas(impp->toutput);
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return 0;
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}
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