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Fix false CRC NOK in LDPC decoding for PDSCH for short code word, e.g. Z_c is not multiple of 8

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This commit is contained in:
Khodr Saaifan
2020-11-27 15:42:58 +01:00
committed by Thomas Schlichter
parent 6b8eb372c5
commit 4b1d496923
1 changed files with 42 additions and 78 deletions
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openair1/PHY/NR_UE_TRANSPORT/nr_dlsch_decoding.c
+42 -78
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@@ -241,7 +241,7 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
uint32_t G;
uint32_t ret,offset;
int32_t no_iteration_ldpc, length_dec;
uint32_t r,r_offset=0,Kr=8424,Kr_bytes,K_bytes_F,err_flag=0;
uint32_t r,r_offset=0,Kr=8424,Kr_bytes,K_bits_F,err_flag=0;
uint8_t crc_type;
int8_t llrProcBuf[NR_LDPC_MAX_NUM_LLR] __attribute__ ((aligned(32)));
t_nrLDPC_dec_params decParams;
@@ -349,32 +349,28 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
if ((A <=292) || ((A<=3824) && (Coderate <= 0.6667)) || Coderate <= 0.25)
{
p_decParams->BG = 2;
kc = 52;
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 = 1;
kc = 68;
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;
}
}
@@ -434,8 +430,7 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
Kr = harq_process->K; // [hna] overwrites this line "Kr = p_decParams->Z*kb"
Kr_bytes = Kr>>3;
K_bytes_F = Kr_bytes-(harq_process->F>>3);
K_bits_F = Kr-harq_process->F;
for (r=0; r<harq_process->C; r++) {
@@ -558,24 +553,16 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
//printf("harq process dr iteration %d\n", p_decParams->numMaxIter);
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; i++, j++)
{
pv[i]= _mm_loadu_si128((__m128i*)(&harq_process->d[r][8*j]));
}
// Kbytes_F = Kr_bytes - F>>3
j+=(harq_process->F>>3);
// for (i=Kr_bytes,j=K_bytes_F-((2*p_decParams->Z)>>3); i < ((kc*p_decParams->Z)>>3); i++, j++)
for (i=Kr_bytes; i < ((kc*p_decParams->Z)>>3); i++,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++)
//set first 2*Z_c bits to zeros
memset(&z[0],0,2*harq_process->Z*sizeof(int16_t));
//set Filler bits
memset((&z[0]+K_bits_F),127,harq_process->F*sizeof(int16_t));
//Move coded bits before filler bits
memcpy((&z[0]+2*harq_process->Z),harq_process->d[r],(K_bits_F-2*harq_process->Z)*sizeof(int16_t));
//skip filler bits
memcpy((&z[0]+Kr),harq_process->d[r]+(Kr-2*harq_process->Z),(kc*harq_process->Z-Kr)*sizeof(int16_t));
//Saturate coded bits before decoding into 8 bits values
for (i=0, j=0; j < ((kc*harq_process->Z)>>4)+1; i+=2, j++)
{
pl[j] = _mm_packs_epi16(pv[i],pv[i+1]);
}
@@ -776,7 +763,7 @@ uint32_t nr_dlsch_decoding_mthread(PHY_VARS_NR_UE *phy_vars_ue,
uint32_t A,E;
uint32_t G;
uint32_t ret,offset;
uint32_t r,r_offset=0,Kr=8424,Kr_bytes,err_flag=0,K_bytes_F;
uint32_t r,r_offset=0,Kr=8424,Kr_bytes,err_flag=0,K_bits_F;
uint8_t crc_type;
//UE_rxtx_proc_t *proc = &phy_vars_ue->proc;
int32_t no_iteration_ldpc,length_dec;
@@ -895,32 +882,28 @@ uint32_t nr_dlsch_decoding_mthread(PHY_VARS_NR_UE *phy_vars_ue,
if ((A <=292) || ((A<=3824) && (Coderate <= 0.6667)) || Coderate <= 0.25)
{
p_decParams->BG = 2;
kc = 52;
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 = 1;
kc = 68;
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;
}
}
@@ -1020,7 +1003,7 @@ uint32_t nr_dlsch_decoding_mthread(PHY_VARS_NR_UE *phy_vars_ue,
Kr = harq_process->K;
Kr_bytes = Kr>>3;
K_bytes_F = Kr_bytes-(harq_process->F>>3);
K_bits_F = Kr-harq_process->F;
E = nr_get_E(G, harq_process->C, harq_process->Qm, harq_process->Nl, r);
@@ -1152,24 +1135,16 @@ uint32_t nr_dlsch_decoding_mthread(PHY_VARS_NR_UE *phy_vars_ue,
inv_d[cnt] = (1)*harq_process->d[r][cnt];
}*/
memset(pv,0,2*p_decParams->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; i++, j++)
{
pv[i]= _mm_loadu_si128((__m128i*)(&harq_process->d[r][8*j]));
}
j+=(harq_process->F>>3);
// for (i=Kr_bytes,j=K_bytes_F-((2*p_decParams->Z)>>3); i < ((kc*p_decParams->Z)>>3); i++, j++)
for (i=Kr_bytes; i < ((kc*p_decParams->Z)>>3); i++,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++)
//set first 2*Z_c bits to zeros
memset(&z[0],0,2*harq_process->Z*sizeof(int16_t));
//set Filler bits
memset((&z[0]+K_bits_F),127,harq_process->F*sizeof(int16_t));
//Move coded bits before filler bits
memcpy((&z[0]+2*harq_process->Z),harq_process->d[r],(K_bits_F-2*harq_process->Z)*sizeof(int16_t));
//skip filler bits
memcpy((&z[0]+Kr),harq_process->d[r]+(Kr-2*harq_process->Z),(kc*harq_process->Z-Kr)*sizeof(int16_t));
//Saturate coded bits before decoding into 8 bits values
for (i=0, j=0; j < ((kc*harq_process->Z)>>4)+1; i+=2, j++)
{
pl[j] = _mm_packs_epi16(pv[i],pv[i+1]);
}
@@ -1395,7 +1370,7 @@ void nr_dlsch_decoding_process(void *arg)
uint32_t A,E;
uint32_t G;
uint32_t ret,offset;
uint32_t r,r_offset=0,Kr,Kr_bytes,err_flag=0,K_bytes_F;
uint32_t r,r_offset=0,Kr,Kr_bytes,err_flag=0,K_bits_F;
uint8_t crc_type;
uint8_t C,Cprime;
uint8_t Qm;
@@ -1457,32 +1432,28 @@ void nr_dlsch_decoding_process(void *arg)
if ((A <=292) || ((A<=3824) && (Coderate <= 0.6667)) || Coderate <= 0.25)
{
p_decParams->BG = 2;
kc = 52;
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 = 1;
kc = 68;
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;
}
}
@@ -1561,7 +1532,7 @@ void nr_dlsch_decoding_process(void *arg)
Kr = harq_process->K;
Kr_bytes = Kr>>3;
K_bytes_F = Kr_bytes-(harq_process->F>>3);
K_bits_F = Kr-harq_process->F;
E = nr_get_E(G, harq_process->C, harq_process->Qm, harq_process->Nl, r);
@@ -1681,23 +1652,16 @@ void nr_dlsch_decoding_process(void *arg)
}
*/
memset(pv,0,2*p_decParams->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; i++, j++)
{
pv[i]= _mm_loadu_si128((__m128i*)(&harq_process->d[r][8*j]));
}
j+=(harq_process->F>>3);
// for (i=Kr_bytes,j=K_bytes_F-((2*p_decParams->Z)>>3); i < ((kc*p_decParams->Z)>>3); i++, j++)
for (i=Kr_bytes; i < ((kc*p_decParams->Z)>>3); i++,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++)
//set first 2*Z_c bits to zeros
memset(&z[0],0,2*harq_process->Z*sizeof(int16_t));
//set Filler bits
memset((&z[0]+K_bits_F),127,harq_process->F*sizeof(int16_t));
//Move coded bits before filler bits
memcpy((&z[0]+2*harq_process->Z),harq_process->d[r],(K_bits_F-2*harq_process->Z)*sizeof(int16_t));
//skip filler bits
memcpy((&z[0]+Kr),harq_process->d[r]+(Kr-2*harq_process->Z),(kc*harq_process->Z-Kr)*sizeof(int16_t));
//Saturate coded bits before decoding into 8 bits values
for (i=0, j=0; j < ((kc*harq_process->Z)>>4)+1; i+=2, j++)
{
pl[j] = _mm_packs_epi16(pv[i],pv[i+1]);
}