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NR UE: modify nr_gold_pdsch() to only generate gold sequence for current slot

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This commit is contained in:
Thomas Schlichter
2020-12-14 12:06:11 +01:00
parent 4f98a626ce
commit a269ad840a
3 changed files with 29 additions and 32 deletions
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openair1/PHY/NR_REFSIG/nr_gold_ue.c
+26 -30
View File
@@ -107,9 +107,10 @@ void nr_gold_pdcch(PHY_VARS_NR_UE* ue,
}
void nr_gold_pdsch(PHY_VARS_NR_UE* ue,
unsigned char ns,
unsigned short *n_idDMRS)
{
unsigned char ns,l;
unsigned char l;
unsigned int n,x1,x2,x2tmp0;
int nscid;
unsigned int nid;
@@ -122,40 +123,35 @@ void nr_gold_pdsch(PHY_VARS_NR_UE* ue,
nid = n_idDMRS[nscid];
else
nid = ue->frame_parms.Nid_cell;
//printf("gold pdsch nid %d lbar %d\n",nid,lbar);
for (ns=0; ns<20; ns++) {
//printf("gold pdsch nid %d lbar %d\n",nid,lbar);
for (l=0; l<14; l++) {
for (l=0; l<14; l++) {
x2tmp0 = ((14*ns+l+1)*((nid<<1)+1))<<17;
x2 = (x2tmp0+(nid<<1)+nscid)%(1<<31); //cinit
LOG_D(PHY,"UE DMRS slot %d, symb %d, x2 %x, nscid %d\n",ns,l,x2,nscid);
//printf("ns %d gold pdsch x2 %d\n",ns,x2);
x2tmp0 = ((14*ns+l+1)*((nid<<1)+1))<<17;
x2 = (x2tmp0+(nid<<1)+nscid)%(1<<31); //cinit
LOG_D(PHY,"UE DMRS slot %d, symb %d, x2 %x, nscid %d\n",ns,l,x2,nscid);
//printf("ns %d gold pdsch x2 %d\n",ns,x2);
x1 = 1+ (1<<31);
x2=x2 ^ ((x2 ^ (x2>>1) ^ (x2>>2) ^ (x2>>3))<<31);
x1 = 1+ (1<<31);
x2=x2 ^ ((x2 ^ (x2>>1) ^ (x2>>2) ^ (x2>>3))<<31);
// skip first 50 double words (1600 bits)
for (n=1; n<50; n++) {
x1 = (x1>>1) ^ (x1>>4);
x1 = x1 ^ (x1<<31) ^ (x1<<28);
x2 = (x2>>1) ^ (x2>>2) ^ (x2>>3) ^ (x2>>4);
x2 = x2 ^ (x2<<31) ^ (x2<<30) ^ (x2<<29) ^ (x2<<28);
//printf("x1 : %x, x2 : %x\n",x1,x2);
}
for (n=0; n<NR_MAX_PDSCH_DMRS_INIT_LENGTH_DWORD; n++) {
x1 = (x1>>1) ^ (x1>>4);
x1 = x1 ^ (x1<<31) ^ (x1<<28);
x2 = (x2>>1) ^ (x2>>2) ^ (x2>>3) ^ (x2>>4);
x2 = x2 ^ (x2<<31) ^ (x2<<30) ^ (x2<<29) ^ (x2<<28);
ue->nr_gold_pdsch[nscid][ns][l][n] = x1^x2;
// if ((ns==2)&&(l==0))
//printf("n=%d : c %x\n",n,x1^x2);
}
// skip first 50 double words (1600 bits)
for (n=1; n<50; n++) {
x1 = (x1>>1) ^ (x1>>4);
x1 = x1 ^ (x1<<31) ^ (x1<<28);
x2 = (x2>>1) ^ (x2>>2) ^ (x2>>3) ^ (x2>>4);
x2 = x2 ^ (x2<<31) ^ (x2<<30) ^ (x2<<29) ^ (x2<<28);
//printf("x1 : %x, x2 : %x\n",x1,x2);
}
for (n=0; n<NR_MAX_PDSCH_DMRS_INIT_LENGTH_DWORD; n++) {
x1 = (x1>>1) ^ (x1>>4);
x1 = x1 ^ (x1<<31) ^ (x1<<28);
x2 = (x2>>1) ^ (x2>>2) ^ (x2>>3) ^ (x2>>4);
x2 = x2 ^ (x2<<31) ^ (x2<<30) ^ (x2<<29) ^ (x2<<28);
ue->nr_gold_pdsch[nscid][ns][l][n] = x1^x2;
// if ((ns==2)&&(l==0))
//printf("n=%d : c %x\n",n,x1^x2);
}
}
}
openair1/PHY/NR_REFSIG/refsig_defs_ue.h
+1
View File
@@ -61,6 +61,7 @@ void nr_gold_pdcch(PHY_VARS_NR_UE* ue,
unsigned short length_dmrs);
void nr_gold_pdsch(PHY_VARS_NR_UE* ue,
unsigned char ns,
unsigned short *n_idDMRS);
void nr_init_pusch_dmrs(PHY_VARS_NR_UE* ue,
openair1/SCHED_NR_UE/phy_procedures_nr_ue.c
+2 -2
View File
@@ -1847,8 +1847,8 @@ int phy_procedures_nrUE_RX(PHY_VARS_NR_UE *ue,
for (int i=0;i<4;i++) if (((1<<i)&dlsch0_harq->dlDmrsSymbPos) > 0) {symb_dmrs=i;break;}
AssertFatal(symb_dmrs>=0,"no dmrs in 0..3\n");
LOG_D(PHY,"Initializing dmrs for symb %d DMRS mask %x\n",symb_dmrs,dlsch0_harq->dlDmrsSymbPos);
nr_gold_pdsch(ue,0);
LOG_D(PHY,"Initializing dmrs for slot %d DMRS mask %x\n", nr_slot_rx, dlsch0_harq->dlDmrsSymbPos);
nr_gold_pdsch(ue, nr_slot_rx, 0);
for (uint16_t m=start_symb_sch;m<(nb_symb_sch+start_symb_sch) ; m++){
nr_slot_fep(ue,