Commit 6980b87a authored by Florian Kaltenberger's avatar Florian Kaltenberger

ldpc_encoder now supports again BG1 and BG2 where the original non-optimized...

ldpc_encoder now supports again BG1 and BG2 where the original non-optimized algorithm is used for BG1

Conflicts:
	openair1/PHY/CODING/ldpc_encoder.c
	openair1/PHY/CODING/ldpc_generate_coefficient.c
parent 392f9c15
......@@ -1045,6 +1045,7 @@ set(PHY_SRC
${OPENAIR1_DIR}/PHY/CODING/nr_segmentation.c
${OPENAIR1_DIR}/PHY/CODING/nrLDPC_decoder.c
${OPENAIR1_DIR}/PHY/CODING/ldpc_encoder.c
${OPENAIR1_DIR}/PHY/CODING/ldpc_generate_coefficient.c
${OPENAIR1_DIR}/PHY/CODING/ccoding_byte.c
${OPENAIR1_DIR}/PHY/CODING/ccoding_byte_lte.c
${OPENAIR1_DIR}/PHY/CODING/3gpplte_sse.c
......
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......@@ -5520,6 +5520,72 @@ int encode_parity_check_part(uint16_t *c,uint16_t *d, short BG,short Zc,short Kb
return 0;
}
short *choose_generator_matrix(short BG,short Zc);
extern short no_shift_values_BG1[1012],pointer_shift_values_BG1[1012],no_shift_values_BG2[2109],pointer_shift_values_BG2[2019];
int encode_parity_check_part_orig(unsigned short *c,unsigned short *d, short BG,short Zc,short Kb)
{
short *Gen_shift_values=choose_generator_matrix(BG,Zc);
short *no_shift_values, *pointer_shift_values;
int no_punctured_columns;
short nrows,ncols;
int i1,i2,i3,i4,i5,t,temp_prime;
unsigned short channel_temp,temp;
short block_length=Zc*Kb;
if (BG==1)
{
no_shift_values=(short *) no_shift_values_BG1;
pointer_shift_values=(short *) pointer_shift_values_BG1;
nrows=46; //parity check bits
ncols=22; //info bits
}
else if (BG==2)
{
no_shift_values=(short *) no_shift_values_BG2;
pointer_shift_values=(short *) pointer_shift_values_BG2;
nrows=46; //parity check bits
ncols=22; //info bits
}
else {
printf("problem with BG\n");
return(-1);
}
no_punctured_columns=(int)((nrows-2)*Zc+block_length-block_length*3)/Zc;
for (i2=0; i2 < 1; i2++)
{
t=Kb*Zc+i2;
//rotate matrix here
for (i5=0; i5 < Kb; i5++)
{
temp = c[i5*Zc];
memmove(&c[i5*Zc], &c[i5*Zc+1], (Zc-1)*sizeof(unsigned char));
c[i5*Zc+Zc-1] = temp;
}
// calculate each row in base graph
for (i1=0; i1 < nrows-no_punctured_columns; i1++)
{
channel_temp=0;
for (i3=0; i3 < Kb; i3++)
{
temp_prime=i1 * ncols + i3;
for (i4=0; i4 < no_shift_values[temp_prime]; i4++)
{
channel_temp = channel_temp ^ c[ i3*Zc + Gen_shift_values[ pointer_shift_values[temp_prime]+i4 ] ];
}
}
d[t+i1*Zc]=channel_temp;
//channel_input[t+i1*Zc]=channel_temp;
}
}
return(0);
}
int ldpc_encoder(unsigned char *test_input,unsigned char *channel_input,short block_length,double rate)
{
uint16_t c[22*384]; //padded input, unpacked, max size
......@@ -5531,43 +5597,48 @@ int ldpc_encoder(unsigned char *test_input,unsigned char *channel_input,short bl
//Table of possible lifting sizes
short lift_size[51]= {2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,18,20,22,24,26,28,30,32,36,40,44,48,52,56,60,64,72,80,88,96,104,112,120,128,144,160,176,192,208,224,240,256,288,320,352,384};
//determine number of bits in codeword
//if (block_length>3840)
//{
BG=1;
Kb = 22;
nrows=46; //parity check bits
ncols=22; //info bits
//}
/* else if (block_length<=3840)
{
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>3840)
{
BG=1;
Kb = 22;
nrows=46; //parity check bits
ncols=22; //info bits
}
else if (block_length<=3840)
{
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;
}
//find minimum value in all sets of lifting size
Zc=0;
for (i1=0; i1 < 51; i1++)
{
if (lift_size[i1] >= (double) block_length/Kb)
if (lift_size[i1] >= block_length/Kb)
{
Zc = lift_size[i1];
//printf("%d\n",Zc);
break;
}
}
if ((Kb*Zc)!=block_length) {
printf("Cannot determine lift size Zc\n");
return(-1);
}
// 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);
no_punctured_columns=((nrows-2)*Zc+block_length-block_length*3)/Zc;
removed_bit=(nrows-no_punctured_columns-2) * Zc+block_length-block_length*3;
//printf("%d\n",no_punctured_columns);
//printf("%d\n",removed_bit);
// unpack input
......@@ -5580,20 +5651,29 @@ int ldpc_encoder(unsigned char *test_input,unsigned char *channel_input,short bl
c[i]=(test_input[i/8]&(1<<(i&7)))>>(i&7);
}
if ((Zc==128) || (Zc==384)) {
// extend matrix
for (i1=0; i1 < ncols; i1++)
{
memcpy(&c_extension[2*i1*Zc], &c[i1*Zc], Zc*sizeof(uint16_t)); /// change type here
memcpy(&c_extension[(2*i1+1)*Zc], &c[i1*Zc], Zc*sizeof(uint16_t));
if (BG==1) {
// extend matrix
for (i1=0; i1 < ncols; i1++)
{
memcpy(&c_extension[2*i1*Zc], &c[i1*Zc], Zc*sizeof(unsigned char)); /// change type here
memcpy(&c_extension[(2*i1+1)*Zc], &c[i1*Zc], Zc*sizeof(unsigned char));
}
//parity check part
if (encode_parity_check_part(c_extension, d, BG, Zc, Kb)!=0) {
printf("Problem with encoder\n");
return(-1);
}
}
//parity check part
encode_parity_check_part(c_extension, d, BG, Zc, Kb);
else if (BG==2) {
if (encode_parity_check_part_orig(c, d, BG, Zc, Kb)!=0) {
printf("Problem with encoder\n");
return(-1);
}
}
else {
//parity check part
encode_parity_check_part(c, d, BG, Zc, Kb);
printf("Problem with encoder\n");
return(-1);
}
// information part and puncture columns
......@@ -5621,14 +5701,14 @@ int ldpc_encoder_multi_segment(unsigned char **test_input,unsigned char **channe
int j;
//determine number of bits in codeword
//if (block_length>3840)
//{
BG=1;
Kb = 22;
nrows=46; //parity check bits
ncols=22; //info bits
//}
/* else if (block_length<=3840)
if (block_length>3840)
{
BG=1;
Kb = 22;
nrows=46; //parity check bits
ncols=22; //info bits
}
else if (block_length<=3840)
{
BG=2;
nrows=42; //parity check bits
......@@ -5642,18 +5722,24 @@ int ldpc_encoder_multi_segment(unsigned char **test_input,unsigned char **channe
Kb = 8;
else
Kb = 6;
} */
}
//find minimum value in all sets of lifting size
Zc=0;
for (i1=0; i1 < 51; i1++)
{
if (lift_size[i1] >= (double) block_length/Kb)
if (lift_size[i1] >= block_length/Kb)
{
Zc = lift_size[i1];
//printf("%d\n",Zc);
break;
}
}
if ((Kb*Zc)!=block_length) {
printf("Cannot determine lift size Zc\n");
return(-1);
}
// calculate number of punctured bits
no_punctured_columns=(int)((nrows-2)*Zc+block_length-block_length*3)/Zc;
......@@ -5670,22 +5756,31 @@ int ldpc_encoder_multi_segment(unsigned char **test_input,unsigned char **channe
}
// parity check part
if ((Zc==128) || (Zc==384)) {
// extend matrix
for (i1=0; i1 < ncols; i1++)
{
memcpy(&c_extension[2*i1*Zc], &c[i1*Zc], Zc*sizeof(uint16_t)); /// change type here
memcpy(&c_extension[(2*i1+1)*Zc], &c[i1*Zc], Zc*sizeof(uint16_t));
if (BG==1) {
// extend matrix
for (i1=0; i1 < ncols; i1++)
{
memcpy(&c_extension[2*i1*Zc], &c[i1*Zc], Zc*sizeof(uint16_t)); /// change type here
memcpy(&c_extension[(2*i1+1)*Zc], &c[i1*Zc], Zc*sizeof(uint16_t));
}
//parity check part
if (encode_parity_check_part(c_extension, d, BG, Zc, Kb)!=0) {
printf("problem with encoder\n");
return(-1);
}
}
//parity check part
encode_parity_check_part(c_extension, d, BG, Zc, Kb);
else if (BG==2) {
//parity check part
if (encode_parity_check_part_orig(c, d, BG, Zc, Kb)!=0) {
printf("problem with encoder\n");
return(-1);
}
}
else {
//parity check part
encode_parity_check_part(c, d, BG, Zc, Kb);
}
printf("Problem with encoder\n");
return(-1);
}
/*
......
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