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modifications for odd N_RB_DL in dlsch_modulation.c

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This commit is contained in:
Raymond Knopp
2016-09-15 10:03:50 -07:00
parent 1e9687fa0b
commit 2d73663bc6
2 changed files with 19 additions and 13 deletions
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openair1/PHY/LTE_TRANSPORT/dlsch_modulation.c
+17 -13
View File
@@ -182,10 +182,11 @@ int allocate_REs_in_RB_no_pilots_16QAM_siso(LTE_DL_FRAME_PARMS *frame_parms,
}
}
else {
// 1st half of PRB
for (x0p=&x0[*jj],tti_offset=symbol_offset+re_offset,re=0;
re<6;
re++,x0p+=4,tti_offset++) {
qam16_table_offset_re=TWO[x0p[0]];
qam16_table_offset_im=TWO[x0p[1]];
qam16_table_offset_re+=x0p[2];
@@ -193,7 +194,7 @@ int allocate_REs_in_RB_no_pilots_16QAM_siso(LTE_DL_FRAME_PARMS *frame_parms,
((int16_t *)&txdataF[0][tti_offset])[0]=qam_table_s0[qam16_table_offset_re];
((int16_t *)&txdataF[0][tti_offset])[1]=qam_table_s0[qam16_table_offset_im];
}
// 2nd half of PRB
for (tti_offset=symbol_offset+re_offset-frame_parms->ofdm_symbol_size+7;
re<12;
re++,x0p+=4,tti_offset++) {
@@ -626,7 +627,7 @@ int allocate_REs_in_RB(LTE_DL_FRAME_PARMS *frame_parms,
switch (mod_order0) {
case 2: //QPSK
// printf("%d(%d) : %d,%d => ",tti_offset,*jj,((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
// printf("re %d %d(%d) : %d,%d => ",re,tti_offset,*jj,((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
((int16_t*)&txdataF[aa][tti_offset])[0] += (x0[*jj]==1) ? (-gain_lin_QPSK) : gain_lin_QPSK; //I //b_i
}
@@ -639,7 +640,7 @@ int allocate_REs_in_RB(LTE_DL_FRAME_PARMS *frame_parms,
*jj = *jj + 1;
// printf("%d,%d\n",((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
// printf("%d,%d\n",((int16_t*)&txdataF[0][tti_offset])[0],((int16_t*)&txdataF[0][tti_offset])[1]);
break;
case 4: //16QAM
@@ -1623,7 +1624,7 @@ inline int check_skip(int rb,int subframe_offset,LTE_DL_FRAME_PARMS *frame_parms
inline int check_skiphalf(int rb,int subframe_offset,LTE_DL_FRAME_PARMS *frame_parms,int l,int nsymb) __attribute__((always_inline));
inline int check_skiphalf(int rb,int subframe_offset,LTE_DL_FRAME_PARMS *frame_parms,int l,int nsymb) {
printf("check_skiphalf : rb %d, subframe_offset %d,l %d, nsymb %d\n",rb,subframe_offset,l,nsymb);
// printf("check_skiphalf : rb %d, subframe_offset %d,l %d, nsymb %d\n",rb,subframe_offset,l,nsymb);
if ((frame_parms->N_RB_DL&1) == 1) { // ODD N_RB_DL
@@ -1913,10 +1914,11 @@ int dlsch_modulation(int32_t **txdataF,
if (check_skip(rb,subframe_offset,frame_parms,l,nsymb)==1)
rb_alloc_ind = 0;
else {
skip_half = check_skiphalf(rb,subframe_offset,frame_parms,l,nsymb);
skip_dc = check_skip_dc(rb,frame_parms);
}
skip_half = check_skiphalf(rb,subframe_offset,frame_parms,l,nsymb);
skip_dc = check_skip_dc(rb,frame_parms);
if (dlsch0_harq->Nlayers>1) {
printf("Nlayers %d: re_offset %d, symbol %d offset %d\n",dlsch0_harq->Nlayers,re_offset,l,symbol_offset);
return(-1);
@@ -1932,7 +1934,7 @@ int dlsch_modulation(int32_t **txdataF,
if (rb_alloc_ind > 0) {
printf("Allocated rb %d/symbol %d, skip_half %d, subframe_offset %d, symbol_offset %d, re_offset %d, jj %d\n",rb,l,skip_half,subframe_offset,symbol_offset,re_offset,jj);
// printf("Allocated rb %d/symbol %d, skip_half %d, subframe_offset %d, symbol_offset %d, re_offset %d, jj %d\n",rb,l,skip_half,subframe_offset,symbol_offset,re_offset,jj);
allocate_REs(frame_parms,
txdataF,
&jj,
@@ -1952,11 +1954,13 @@ int dlsch_modulation(int32_t **txdataF,
P1_SHIFT,
P2_SHIFT);
}
else {
// printf("Unallocated rb %d/symbol %d, re_offset %d, jj %d\n",rb,l,re_offset,jj);
}
re_offset+=12; // go to next RB
// check if we crossed the symbol boundary and skip DC
// check if we crossed the symbol boundary and skip DCs
if (re_offset >= frame_parms->ofdm_symbol_size) {
if (skip_dc == 0) //even number of RBs (doesn't straddle DC)
re_offset=1;
openair1/SIMULATION/LTE_PHY/dlsim.c
+2
View File
@@ -2404,6 +2404,8 @@ int main(int argc, char **argv)
write_output("txsig0.m","txs0", &eNB->common_vars.txdata[eNB_id][0][subframe* eNB->frame_parms.samples_per_tti],
eNB->frame_parms.samples_per_tti,1,1);
write_output("txsigF0.m","txsF0", &eNB->common_vars.txdataF[eNB_id][0][subframe*nsymb*eNB->frame_parms.ofdm_symbol_size],
nsymb*eNB->frame_parms.ofdm_symbol_size,1,1);
}
}