Commit 39fa3e00 authored by Hongzhi Wang's avatar Hongzhi Wang

adding ldpc decoder code rate adaptation

parent 232efe78
Pipeline #11951 passed with stage
in 0 seconds
......@@ -54,7 +54,7 @@ int32_t nrLDPC_decoder(t_nrLDPC_dec_params* p_decParams, int8_t* p_llr, int8_t*
t_nrLDPC_lut lut;
t_nrLDPC_lut* p_lut = &lut;
printf("p_procBuf->cnProcBuf = %p\n", p_procBuf->cnProcBuf);
//printf("p_procBuf->cnProcBuf = %p\n", p_procBuf->cnProcBuf);
// Initialize decoder core(s) with correct LUTs
numLLR = nrLDPC_init(p_decParams, p_lut);
......
......@@ -182,6 +182,7 @@ int nr_rate_matching_ldpc_rx(uint8_t Ilbrm,
#endif
}
if (rvidx !=0){
while(k<E) {
for (ind=0; (ind<Ncb)&&(k<E); ind++) {
if (soft_input[ind] != NR_NULL) {
......@@ -200,6 +201,7 @@ int nr_rate_matching_ldpc_rx(uint8_t Ilbrm,
#endif
}
}
}
return 0;
}
......@@ -156,7 +156,7 @@ else
if (*F>0) {
for (k=Kprime>>3; k<(*K)>>3; k++) {
output_buffers[r][k] = NR_NULL;
output_buffers[r][k] = 0;
//printf("r %d filler bits [%d] = %d Kprime %d \n", r,k, output_buffers[r][k], Kprime);
}
}
......
......@@ -277,17 +277,18 @@ int nr_dlsch_encoding(unsigned char *a,
nfapi_nr_dl_config_dlsch_pdu_rel15_t rel15 = dlsch->harq_processes[harq_pid]->dlsch_pdu.dlsch_pdu_rel15;
uint16_t nb_rb = rel15.n_prb;
uint8_t nb_symb_sch = rel15.nb_symbols;
uint32_t A, Z;
uint32_t A, Z, F=0;
uint32_t *pz = &Z;
uint8_t mod_order = rel15.modulation_order;
uint16_t Kr=0,r,r_offset=0,Kr_bytes;
uint8_t *d_tmp[MAX_NUM_DLSCH_SEGMENTS];
uint8_t kb,BG=1;
uint8_t BG=1;
uint32_t E;
uint8_t Ilbrm = 0;
uint32_t Tbslbrm = 950984; //max tbs
uint8_t nb_re_dmrs = rel15.nb_re_dmrs;
uint16_t length_dmrs = 1;
float Coderate = 0.0;
/*
uint8_t *channel_input[MAX_NUM_DLSCH_SEGMENTS]; //unsigned char
......@@ -337,18 +338,20 @@ int nr_dlsch_encoding(unsigned char *a,
pz,
&dlsch->harq_processes[harq_pid]->F);
kb = dlsch->harq_processes[harq_pid]->K/(*pz);
if ( kb==22){
BG = 1;
F = dlsch->harq_processes[harq_pid]->F;
Coderate = (float) A /(float) G;
if ((A <=292) || ((A<=3824) && (Coderate <= 0.6667)) || Coderate <= 0.25){
BG = 2;
}
else{
BG = 2;
BG = 1;
}
Kr = dlsch->harq_processes[harq_pid]->K;
Kr_bytes = Kr>>3;
//printf("segment Z %d kb %d k %d Kr %d BG %d\n", *pz,kb,dlsch->harq_processes[harq_pid]->K,Kr,BG);
//printf("segment Z %d k %d Kr %d BG %d\n", *pz,dlsch->harq_processes[harq_pid]->K,Kr,BG);
//start_meas(te_stats);
for (r=0; r<dlsch->harq_processes[harq_pid]->C; r++) {
......@@ -393,6 +396,14 @@ int nr_dlsch_encoding(unsigned char *a,
}
for (r=0; r<dlsch->harq_processes[harq_pid]->C; r++) {
if (dlsch->harq_processes[harq_pid]->F>0) {
for (int k=(Kr-F-2*(*pz)); k<Kr-2*(*pz); k++) {
dlsch->harq_processes[harq_pid]->d[r][k] = NR_NULL;
//if (k<(Kr-F+8))
//printf("r %d filler bits [%d] = %d \n", r,k, dlsch->harq_processes[harq_pid]->d[r][k]);
}
}
#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",
r,
......
......@@ -218,8 +218,7 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
uint32_t A,E;
uint32_t G;
uint32_t ret,offset;
int32_t no_iteration_ldpc;
//short dummy_w[MAX_NUM_DLSCH_SEGMENTS][3*(8448+64)];
int32_t no_iteration_ldpc, length_dec;
uint32_t r,r_offset=0,Kr=8424,Kr_bytes,K_bytes_F,err_flag=0;
uint8_t crc_type;
int8_t llrProcBuf[OAI_LDPC_MAX_NUM_LLR] __attribute__ ((aligned(32)));
......@@ -233,17 +232,15 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
int8_t l [68*384];
//__m128i l;
int16_t inv_d [68*384];
// int16_t *p_invd =&inv_d;
uint8_t kb, kc;
uint8_t kc;
uint8_t Ilbrm = 0;
uint32_t Tbslbrm = 950984;
uint16_t nb_rb = 30; //to update
//uint16_t nb_symb_sch = 12;
uint8_t nb_re_dmrs = 6;
uint16_t length_dmrs = 1;
double Coderate = 0.0;
uint32_t i,j;
// uint32_t k;
__m128i *pv = (__m128i*)&z;
__m128i *pl = (__m128i*)&l;
......@@ -322,21 +319,41 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
printf("K %d C %d Z %d nl %d \n", harq_process->K, harq_process->C, p_decParams->Z, harq_process->Nl);
#endif
}
kb = harq_process->K/harq_process->Z;
if ( kb==22){
p_decParams->BG = 1;
p_decParams->R = 13;
kc = 68;
Coderate = (float) A /(float) G;
if ((A <=292) || ((A<=3824) && (Coderate <= 0.6667)) || Coderate <= 0.25){
p_decParams->BG = 2;
if (Coderate < 0.3333){
p_decParams->R = 15;
kc = 52;
}
else if (Coderate <0.6667){
p_decParams->R = 13;
kc = 32;
}
else {
p_decParams->R = 23;
kc = 17;
}
}
else{
p_decParams->BG = 2;
p_decParams->R = 13;
kc = 52;
}
p_decParams->BG = 1;
if (Coderate < 0.6667){
p_decParams->R = 13;
kc = 68;
}
else if (Coderate <0.8889){
p_decParams->R = 23;
kc = 35;
}
else {
p_decParams->R = 89;
kc = 27;
}
}
//printf("coderate %f kc %d \n", Coderate, kc);
p_decParams->numMaxIter = dlsch->max_ldpc_iterations;
Kr = p_decParams->Z*kb;
p_decParams->outMode= 0;
......@@ -453,54 +470,38 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
memset(harq_process->c[r],0,Kr_bytes);
// printf("done\n");
if (harq_process->C == 1)
if (harq_process->C == 1){
crc_type = CRC24_A;
else
length_dec = harq_process->B;
}
else{
crc_type = CRC24_B;
length_dec = (harq_process->B+24*harq_process->C)/harq_process->C;
}
if (err_flag == 0) {
/*
LOG_I(PHY, "turbo algo Kr=%d cb_cnt=%d C=%d nbRB=%d crc_type %d TBSInput=%d TBSHarq=%d TBSplus24=%d mcs=%d Qm=%d RIV=%d round=%d maxIter %d\n",
Kr,r,harq_process->C,harq_process->nb_rb,crc_type,A,harq_process->TBS,
harq_process->B,harq_process->mcs,harq_process->Qm,harq_process->rvidx,harq_process->round,dlsch->max_ldpc_iterations);
*/
#if UE_TIMING_TRACE
start_meas(dlsch_turbo_decoding_stats);
#endif
//LOG_E(PHY,"AbsSubframe %d.%d Start turbo segment %d/%d A %d ",frame%1024,nr_tti_rx,r,harq_process->C-1, A);
//LOG_E(PHY,"AbsSubframe %d.%d Start LDPC segment %d/%d A %d ",frame%1024,nr_tti_rx,r,harq_process->C-1, A);
//printf("harq process dr iteration %d\n", p_decParams->numMaxIter);
for (int cnt =0; cnt < (kc-2)*p_decParams->Z; cnt++){
inv_d[cnt] = (1)*harq_process->d[r][cnt];
}
/*for (int cnt =0; cnt < 16; cnt++){
printf("dr %d inv_d %d \n", harq_process->d[r][cnt], inv_d[cnt]);
}
printf(" \n");
printf("end dr \n");
for (int cnt =(50*p_decParams->Z-16) ; cnt < 50*p_decParams->Z; cnt++){
printf("%d ", harq_process->d[r][cnt]);
}
printf(" \n");*/
memset(pv,0,2*harq_process->Z*sizeof(int16_t));
memset(pv,0,2*harq_process->Z*sizeof(int16_t));
//memset(pl,0,2*p_decParams->Z*sizeof(int8_t));
memset((pv+K_bytes_F),127,harq_process->F*sizeof(int16_t));
for (i=((2*p_decParams->Z)>>3), j = 0; i < K_bytes_F+((2*p_decParams->Z)>>3); i++, j++)
for (i=((2*p_decParams->Z)>>3), j = 0; i < K_bytes_F; i++, j++)
{
pv[i]= _mm_loadu_si128((__m128i*)(&inv_d[8*j]));
pv[i]= _mm_loadu_si128((__m128i*)(&harq_process->d[r][8*j]));
}
for (i=Kr_bytes+((2*p_decParams->Z)>>3),j=Kr_bytes; i < ((kc*p_decParams->Z)>>3); i++, j++)
for (i=Kr_bytes,j=K_bytes_F-((2*p_decParams->Z)>>3); i < ((kc*p_decParams->Z)>>3); i++, j++)
{
pv[i]= _mm_loadu_si128((__m128i*)(&inv_d[8*j]));
pv[i]= _mm_loadu_si128((__m128i*)(&harq_process->d[r][8*j]));
}
for (i=0, j=0; j < ((kc*p_decParams->Z)>>4); i+=2, j++)
......@@ -517,8 +518,8 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
p_procTime);
// Fixme: correct type is unsigned, but nrLDPC_decoder and all called behind use signed int
if (check_crc((uint8_t*)llrProcBuf,harq_process->B,harq_process->F,crc_type)) {
printf("CRC OK\n");
if (check_crc((uint8_t*)llrProcBuf,length_dec,harq_process->F,crc_type)) {
printf("Segment %d CRC OK\n",r);
ret = 2;
}
else {
......
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