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including first carrier offset in csi mapping

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This commit is contained in:
Francesco Mani
2020-08-12 12:24:54 +02:00
parent 5117f0110f
commit 5390811cac
1 changed files with 10 additions and 8 deletions
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openair1/PHY/NR_TRANSPORT/nr_csi_rs.c
+10 -8
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@@ -551,14 +551,16 @@ int nr_generate_csi_rs(uint32_t **gold_csi_rs,
}
uint16_t start_sc = frame_parms->first_carrier_offset;
// resource mapping according to 38.211 7.4.1.5.3
for (n=csi_start; n<(csi_start+csi_bw); n++) {
if ( (csi_params.freq_density > 1) || (csi_params.freq_density == (n%2))) { // for freq density 0.5 checks if even or odd RB
for (int ji=0; ji<size; ji++) { // loop over CDM groups
for (int s=0 ; s<gs; s++) { // loop over each CDM group size
p = 3000+s+j[ji]*gs; // port index
p = s+j[ji]*gs; // port index
for (kp=0; kp<=kprime; kp++) { // loop over frequency resource elements within a group
k = (n*NR_NB_SC_PER_RB)+koverline[ji]+kp; // frequency index of current resource element
k = (start_sc+(n*NR_NB_SC_PER_RB)+koverline[ji]+kp)%(frame_parms->ofdm_symbol_size); // frequency index of current resource element
// wf according to tables 7.4.5.3-2 to 7.4.5.3-5
if (kp == 0)
wf = 1;
@@ -584,16 +586,16 @@ int nr_generate_csi_rs(uint32_t **gold_csi_rs,
}
// ZP CSI RS
if (csi_params.csi_type == 2) {
((int16_t*)txdataF[p-3000])[(l*frame_parms.ofdm_symbol_size + k)<<1] = 0;
((int16_t*)txdataF[p-3000])[((l*frame_parms.ofdm_symbol_size + k)<<1) + 1] = 0;
((int16_t*)txdataF[p])[(l*frame_parms.ofdm_symbol_size + k)<<1] = 0;
((int16_t*)txdataF[p])[((l*frame_parms.ofdm_symbol_size + k)<<1) + 1] = 0;
}
else {
((int16_t*)txdataF[p-3000])[(l*frame_parms.ofdm_symbol_size + k)<<1] = (beta*wt*wf*mod_csi[l][mprime<<1]) >> 15;
((int16_t*)txdataF[p-3000])[((l*frame_parms.ofdm_symbol_size + k)<<1) + 1] = (beta*wt*wf*mod_csi[l][(mprime<<1) + 1]) >> 15;
((int16_t*)txdataF[p])[(l*frame_parms.ofdm_symbol_size + k)<<1] = (beta*wt*wf*mod_csi[l][mprime<<1]) >> 15;
((int16_t*)txdataF[p])[((l*frame_parms.ofdm_symbol_size + k)<<1) + 1] = (beta*wt*wf*mod_csi[l][(mprime<<1) + 1]) >> 15;
}
#ifdef NR_CSIRS_DEBUG
printf("l,k (%d %d) seq. index %d \t port %d \t (%d,%d)\n",l,k,mprime,p,((int16_t*)txdataF[p-3000])[(l*frame_parms.ofdm_symbol_size + k)<<1],
((int16_t*)txdataF[p-3000])[((l*frame_parms.ofdm_symbol_size + k)<<1) + 1]);
printf("l,k (%d %d) seq. index %d \t port %d \t (%d,%d)\n",l,k-start_sc,mprime,p+3000,((int16_t*)txdataF[p])[(l*frame_parms.ofdm_symbol_size + k)<<1],
((int16_t*)txdataF[p])[((l*frame_parms.ofdm_symbol_size + k)<<1) + 1]);
#endif
}
}