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patch from Milan Zivkovic (Nokia Bell Labs)

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This commit is contained in:
Florian Kaltenberger
2018-09-07 06:48:09 -07:00
parent 5520c2ebd4
commit 6e29ff0872
6 changed files with 850 additions and 265 deletions
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openair1/PHY/CODING/nrLDPC_encoder/ldpc_generate_coefficient.c
+26 -30
View File
@@ -361,7 +361,7 @@ short *choose_generator_matrix(short BG,short Zc)
return Gen_shift_values;
}
int ldpc_encoder_orig(unsigned char *test_input,unsigned char *channel_input,short block_length,short BG,unsigned char gen_code)
int ldpc_encoder_orig(unsigned char *test_input,unsigned char *channel_input,short block_length, short BG,unsigned char gen_code)
{
unsigned char c[22*384]; //padded input, unpacked, max size
unsigned char d[68*384]; //coded output, unpacked, max size
@@ -378,26 +378,30 @@ int ldpc_encoder_orig(unsigned char *test_input,unsigned char *channel_input,sho
int indlist2[1000];
//determine number of bits in codeword
if (BG==1)
{
Kb = 22;
nrows=46; //parity check bits
ncols=22; //info bits
}
else if (BG==2)
{
nrows=42; //parity check bits
ncols=10; // info bits
//if (block_length>3840)
if (BG==1)
{
//BG=1;
Kb = 22;
nrows=46; //parity check bits
ncols=22; //info bits
}
//else if (block_length<=3840)
else if (BG==2)
{
//BG=2;
nrows=42; //parity check bits
ncols=10; // info bits
if (block_length>640)
Kb = 10;
else if (block_length>560)
Kb = 9;
else if (block_length>192)
Kb = 8;
else
Kb = 6;
}
if (block_length>640)
Kb = 10;
else if (block_length>560)
Kb = 9;
else if (block_length>192)
Kb = 8;
else
Kb = 6;
}
//find minimum value in all sets of lifting size
Zc=0;
@@ -415,8 +419,6 @@ int ldpc_encoder_orig(unsigned char *test_input,unsigned char *channel_input,sho
return(-1);
}
int K = ncols*Zc;
Gen_shift_values=choose_generator_matrix(BG,Zc);
if (Gen_shift_values==NULL) {
printf("ldpc_encoder_orig: could not find generator matrix\n");
@@ -438,15 +440,9 @@ int ldpc_encoder_orig(unsigned char *test_input,unsigned char *channel_input,sho
}
no_punctured_columns=(int)((nrows-2)*Zc+block_length-block_length*3)/Zc;
//nrows - no_punctured_columns = 2 +2*block_length/Zc
removed_bit=(nrows-no_punctured_columns-2) * Zc+block_length-(block_length*3);
// ((nrows-no_punctured_columns) * Zc-removed_bit) =
// 2Zc + 2*block_length
//printf("%d\n",no_punctured_columns);
//printf("%d\n",removed_bit);
//printf("%d\n",nrows-no_punctured_columns);
//printf("%d\n",((nrows-no_punctured_columns) * Zc-removed_bit));
// unpack input
memset(c,0,sizeof(unsigned char) * ncols * Zc);
memset(d,0,sizeof(unsigned char) * nrows * Zc);
@@ -614,8 +610,8 @@ int ldpc_encoder_orig(unsigned char *test_input,unsigned char *channel_input,sho
}
// information part and puncture columns
memcpy(&channel_input[0], &c[2*Zc], (block_length-2*Zc)*sizeof(unsigned char)); //systematic bits
memcpy(&channel_input[block_length-2*Zc], &d[0], ((nrows-no_punctured_columns) * Zc-removed_bit)*sizeof(unsigned char)); //systematic bits 2Zc + 2*block_length
memcpy(&channel_input[0], &c[2*Zc], (block_length-2*Zc)*sizeof(unsigned char));
memcpy(&channel_input[block_length-2*Zc], &d[0], ((nrows-no_punctured_columns) * Zc-removed_bit)*sizeof(unsigned char));
//memcpy(channel_input,c,Kb*Zc*sizeof(unsigned char));
return 0;
}