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Applying LDPC code rate fix at nr_ulsch_encoding

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This commit is contained in:
Khalid Ahmed
2019-03-07 11:35:18 +01:00
committed by Thomas Schlichter
parent bc53a0a771
commit d7abeed6ab
1 changed files with 26 additions and 12 deletions
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openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_coding.c
+26 -12
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@@ -200,18 +200,19 @@ int nr_ulsch_encoding(NR_UE_ULSCH_t *ulsch,
NR_UL_UE_HARQ_t *harq_process; NR_UL_UE_HARQ_t *harq_process;
uint16_t nb_rb ; uint16_t nb_rb ;
uint8_t nb_symb_sch ; uint8_t nb_symb_sch ;
uint32_t A, Z; uint32_t A, Z, F;
uint32_t *pz; uint32_t *pz;
uint8_t mod_order; uint8_t mod_order;
uint16_t Kr,r,r_offset,Kr_bytes; uint16_t Kr,r,r_offset,Kr_bytes;
uint8_t *d_tmp[MAX_NUM_DLSCH_SEGMENTS]; uint8_t *d_tmp[MAX_NUM_DLSCH_SEGMENTS];
uint8_t kb,BG; uint8_t BG;
uint32_t E; uint32_t E;
uint8_t Ilbrm; uint8_t Ilbrm;
uint32_t Tbslbrm; uint32_t Tbslbrm;
uint8_t nb_re_dmrs; uint8_t nb_re_dmrs;
uint16_t length_dmrs; uint16_t length_dmrs;
int i; int i;
float Coderate;
/////////// ///////////
/////////////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////////////
@@ -230,10 +231,12 @@ int nr_ulsch_encoding(NR_UE_ULSCH_t *ulsch,
Kr=0; Kr=0;
r_offset=0; r_offset=0;
BG = 1; BG = 1;
F=0;
Ilbrm = 0; Ilbrm = 0;
Tbslbrm = 950984; //max tbs Tbslbrm = 950984; //max tbs
nb_re_dmrs = ulsch->nb_re_dmrs; nb_re_dmrs = ulsch->nb_re_dmrs;
length_dmrs = 1; length_dmrs = 1;
Coderate = 0.0;
/////////// ///////////
///////////////////////////////////////////////////////////////////////////////////////// /////////////////////////////////////////////////////////////////////////////////////////
@@ -251,7 +254,7 @@ int nr_ulsch_encoding(NR_UE_ULSCH_t *ulsch,
G = nr_get_G(nb_rb, nb_symb_sch, nb_re_dmrs, length_dmrs,mod_order,harq_process->Nl); G = nr_get_G(nb_rb, nb_symb_sch, nb_re_dmrs, length_dmrs,mod_order,harq_process->Nl);
LOG_D(PHY,"dlsch coding A %d G %d mod_order %d\n", A,G, mod_order); LOG_D(PHY,"ulsch coding A %d G %d mod_order %d\n", A,G, mod_order);
printf("ulsch coding A %d G %d mod_order %d\n", A,G, mod_order); printf("ulsch coding A %d G %d mod_order %d\n", A,G, mod_order);
Tbslbrm = nr_compute_tbs(28,nb_rb,frame_parms->symbols_per_slot,0,0, harq_process->Nl); Tbslbrm = nr_compute_tbs(28,nb_rb,frame_parms->symbols_per_slot,0,0, harq_process->Nl);
@@ -266,7 +269,7 @@ int nr_ulsch_encoding(NR_UE_ULSCH_t *ulsch,
/////////// ///////////
/* /*
int i; int i;
printf("dlsch (tx): \n"); printf("ulsch (tx): \n");
for (i=0;i<(A>>3);i++) for (i=0;i<(A>>3);i++)
printf("%02x.",a[i]); printf("%02x.",a[i]);
printf("\n"); printf("\n");
@@ -297,13 +300,15 @@ int nr_ulsch_encoding(NR_UE_ULSCH_t *ulsch,
pz, pz,
&harq_process->F); &harq_process->F);
kb = harq_process->K/(*pz); F = harq_process->F;
if ( kb==22){ Coderate = (float) A /(float) G;
BG = 1;
} if ((A <=292) || ((A<=3824) && (Coderate <= 0.6667)) || Coderate <= 0.25){
else{ BG = 2;
BG = 2; }
} else{
BG = 1;
}
Kr = harq_process->K; Kr = harq_process->K;
Kr_bytes = Kr>>3; Kr_bytes = Kr>>3;
@@ -316,7 +321,7 @@ int nr_ulsch_encoding(NR_UE_ULSCH_t *ulsch,
///////////////////////// c---->| LDCP coding |---->d ///////////////////////// ///////////////////////// c---->| LDCP coding |---->d /////////////////////////
/////////// ///////////
//printf("segment Z %d kb %d k %d Kr %d BG %d\n", *pz,kb,harq_process->K,Kr,BG); //printf("segment Z %d k %d Kr %d BG %d\n", *pz,harq_process->K,Kr,BG);
//start_meas(te_stats); //start_meas(te_stats);
for (r=0; r<harq_process->C; r++) { for (r=0; r<harq_process->C; r++) {
@@ -364,6 +369,15 @@ int nr_ulsch_encoding(NR_UE_ULSCH_t *ulsch,
} }
for (r=0; r<harq_process->C; r++) { // looping over C segments for (r=0; r<harq_process->C; r++) { // looping over C segments
if (harq_process->F>0) {
for (int k=(Kr-F-2*(*pz)); k<Kr-2*(*pz); k++) {
harq_process->d[r][k] = NR_NULL;
//if (k<(Kr-F+8))
//printf("r %d filler bits [%d] = %d \n", r,k, harq_process->d[r][k]);
}
}
#ifdef DEBUG_DLSCH_CODING #ifdef DEBUG_DLSCH_CODING
printf("Rate Matching, Code segment %d (coded bits (G) %d,unpunctured/repeated bits per code segment %d,mod_order %d, nb_rb %d)...\n", printf("Rate Matching, Code segment %d (coded bits (G) %d,unpunctured/repeated bits per code segment %d,mod_order %d, nb_rb %d)...\n",
r, r,