1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
/*
* 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 ldpc_encoder_optim.c
* \brief Defines the optimized LDPC encoder
* \author Florian Kaltenberger, Raymond Knopp, Kien le Trung (Eurecom)
* \email openair_tech@eurecom.fr
* \date 27-03-2018
* \version 1.0
* \note
* \warning
*/
#include <stdlib.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
#include "assertions.h"
#include "common/utils/LOG/log.h"
#include "time_meas.h"
#include "openair1/PHY/CODING/nrLDPC_defs.h"
#include "ldpc_encode_parity_check.c"
#include "ldpc_generate_coefficient.c"
int nrLDPC_encod(unsigned char **test_input,unsigned char **channel_input,int Zc,int Kb,short block_length, short BG, encoder_implemparams_t *impp)
{
short nrows=0,ncols=0;
int rate=3;
int no_punctured_columns,removed_bit;
int simd_size;
//determine number of bits in codeword
//if (block_length>3840)
if (BG==1)
{
//BG=1;
nrows=46; //parity check bits
ncols=22; //info bits
rate=3;
}
//else if (block_length<=3840)
else if (BG==2)
{
//BG=2;
nrows=42; //parity check bits
ncols=10; // info bits
rate=5;
}
#ifdef DEBUG_LDPC
LOG_D(PHY,"ldpc_encoder_optim_8seg: BG %d, Zc %d, Kb %d, block_length %d\n",BG,Zc,Kb,block_length);
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]);
#endif
if ((Zc&31) > 0) simd_size = 16;
else simd_size = 32;
unsigned char c[22*Zc] __attribute__((aligned(32))); //padded input, unpacked, max size
unsigned char d[46*Zc] __attribute__((aligned(32))); //coded parity part output, unpacked, max size
// calculate number of punctured bits
no_punctured_columns=(int)((nrows-2)*Zc+block_length-block_length*rate)/Zc;
removed_bit=(nrows-no_punctured_columns-2) * Zc+block_length-(int)(block_length*rate);
// printf("%d\n",no_punctured_columns);
// printf("%d\n",removed_bit);
// unpack input
memset(c,0,sizeof(unsigned char) * ncols * Zc);
memset(d,0,sizeof(unsigned char) * nrows * Zc);
if(impp->tinput != NULL) start_meas(impp->tinput);
for (int i=0; i<block_length; i++) {
c[i] = (test_input[0][i/8]&(128>>(i&7)))>>(7-(i&7));
//printf("c(%d,%d)=%d\n",j,i,temp);
}
if(impp->tinput != NULL) stop_meas(impp->tinput);
if ((BG==1 && Zc>=176) || (BG==2 && Zc>=64)) {
// extend matrix
if(impp->tprep != NULL) start_meas(impp->tprep);
if(impp->tprep != NULL) stop_meas(impp->tprep);
//parity check part
if(impp->tparity != NULL) start_meas(impp->tparity);
encode_parity_check_part_optim(c, d, BG, Zc, Kb,simd_size, ncols);
if(impp->tparity != NULL) stop_meas(impp->tparity);
}
else {
if (encode_parity_check_part_orig(c, d, BG, Zc, Kb, block_length)!=0) {
printf("Problem with encoder\n");
return(-1);
}
}
if(impp->toutput != NULL) start_meas(impp->toutput);
// information part and puncture columns
memcpy(&channel_input[0][0], &c[2*Zc], (block_length-2*Zc)*sizeof(unsigned char));
memcpy(&channel_input[0][block_length-2*Zc], &d[0], ((nrows-no_punctured_columns) * Zc-removed_bit)*sizeof(unsigned char));
if(impp->toutput != NULL) stop_meas(impp->toutput);
return 0;
}