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Commit d986d8bf authored by Francesco Mani's avatar Francesco Mani
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csi-rs resource mapping (to be debugged and tested)

parent f8f97a21
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Showing with 169 additions and 14 deletions
openair1/PHY/INIT/nr_init.c
View file @ d986d8bf
......@@ -199,6 +199,7 @@ int phy_init_nr_gNB(PHY_VARS_gNB *gNB,
/// Transport init necessary for NR synchro
init_nr_transport(gNB);
gNB->first_run_I0_measurements = 1;
common_vars->rxdata = (int32_t **)malloc16(Prx*sizeof(int32_t*));
......
openair1/PHY/NR_TRANSPORT/nr_csi_rs.c
View file @ d986d8bf
......@@ -21,20 +21,27 @@
#include "PHY/NR_TRANSPORT/nr_transport_proto.h"
#include "PHY/MODULATION/nr_modulation.h"
//#define NR_CSIRS_DEBUG
int nr_generate_csi_rs(uint32_t **gold_csi_rs,
int32_t *txdataF,
int32_t** txdataF,
int16_t amp,
NR_DL_FRAME_PARMS frame_parms,
nfapi_nr_csi_rs_pdu_t csi_params)
{
int16_t mod_csi[frame_parms.symbols_per_slot][NR_MAX_CSI_RS_LENGTH>>1];
uint16_t b = csi_params.freq_domain;
uint8_t size, ports, kprime, lprime, i;
uint16_t n, csi_bw, csi_start, p, k, l, mprime, na, kpn, csi_length;
uint8_t size, ports, kprime, lprime, i, gs;
uint8_t j[16], k_n[6], koverline[16], loverline[16];
int found = 0;
int wf, wt, lp, kp, symb;
uint8_t fi = 0;
double rho, alpha;
uint32_t beta;
switch (csi_params.row) {
// implementation of table 7.4.1.5.3-1 of 38.211
......@@ -55,7 +62,7 @@ int nr_generate_csi_rs(uint32_t **gold_csi_rs,
for (i=0; i<size; i++) {
j[i] = 0;
loverline[i] = csi_params.symb_l0;
koverline[i] = k_n[0] + i<<2;
koverline[i] = k_n[0] + (i<<2);
}
break;
......@@ -115,7 +122,7 @@ int nr_generate_csi_rs(uint32_t **gold_csi_rs,
for (i=0; i<size; i++) {
j[i] = i;
loverline[i] = csi_params.symb_l0;
koverline[i] = k_n[0] + i<<1;
koverline[i] = k_n[0] + (i<<1);
}
break;
......@@ -172,7 +179,7 @@ int nr_generate_csi_rs(uint32_t **gold_csi_rs,
}
for (i=0; i<size; i++) {
j[i] = i;
loverline[i] = csi_params.symb_l0 + i>>1;
loverline[i] = csi_params.symb_l0 + (i>>1);
koverline[i] = k_n[i%2];
}
break;
......@@ -233,7 +240,6 @@ int nr_generate_csi_rs(uint32_t **gold_csi_rs,
koverline[i] = k_n[i];
}
break;
}
case 11:
ports = 16;
......@@ -249,11 +255,10 @@ int nr_generate_csi_rs(uint32_t **gold_csi_rs,
}
for (i=0; i<size; i++) {
j[i] = i;
loverline[i] = csi_params.symb_l0 + i>>2;
loverline[i] = csi_params.symb_l0 + (i>>2);
koverline[i] = k_n[i%4];
}
break;
}
case 12:
ports = 16;
......@@ -352,9 +357,9 @@ int nr_generate_csi_rs(uint32_t **gold_csi_rs,
for (i=0; i<size; i++) {
j[i] = i;
if (i<8)
loverline[i] = csi_params.symb_l0 + i>>2;
loverline[i] = csi_params.symb_l0 + (i>>2);
else
loverline[i] = csi_params.symb_l1 + i>>4;
loverline[i] = csi_params.symb_l1 + (i>>4);
koverline[i] = k_n[i%4];
}
break;
......@@ -402,5 +407,154 @@ int nr_generate_csi_rs(uint32_t **gold_csi_rs,
}
// setting the frequency density from its index
switch (csi_params.freq_density) {
case 0:
rho = 0.5;
break;
case 1:
rho = 0.5;
break;
case 2:
rho = 1;
break;
case 3:
rho = 3;
break;
}
if (ports == 1)
alpha = rho;
else
alpha = 2*rho;
// CDM group size from CDM type index
switch (csi_params.cdm_type) {
case 0:
gs = 1;
break;
case 1:
gs = 2;
break;
case 2:
gs = 4;
break;
case 3:
gs = 8;
break;
}
// according to 38.214 5.2.2.3.1 last paragraph
if (csi_params.start_rb<csi_params.bwp_start)
csi_start = csi_params.bwp_start;
else
csi_start = csi_params.start_rb;
if (csi_params.nr_of_rbs > (csi_params.bwp_start+csi_params.bwp_size-csi_start))
csi_bw = csi_params.bwp_start+csi_params.bwp_size-csi_start;
else
csi_bw = csi_params.nr_of_rbs;
if (rho < 1)
csi_length = ((csi_bw + csi_start)>>1)<<kprime;
else
csi_length = ((uint16_t) rho*(csi_bw + csi_start))<<kprime;
// TRS
if (csi_params.csi_type == 0) {
// ???
}
// NZP CSI RS
if (csi_params.csi_type == 1) {
// assuming amp is the amplitude of SSB channels
switch (csi_params.power_control_offset_ss) {
case 0:
beta = (amp*ONE_OVER_SQRT2_Q15)>>15;
break;
case 1:
beta = amp;
break;
case 2:
beta = (amp*ONE_OVER_SQRT2_Q15)>>14;
break;
case 3:
beta = amp<<1;
break;
}
for (lp=0; lp<=lprime; lp++){
symb = csi_params.symb_l0;
nr_modulation(gold_csi_rs[symb+lp], csi_length, DMRS_MOD_ORDER, mod_csi[symb+lp]);
if ((csi_params.row == 5) || (csi_params.row == 7) || (csi_params.row == 11) || (csi_params.row == 13) || (csi_params.row == 16))
nr_modulation(gold_csi_rs[symb+1], csi_length, DMRS_MOD_ORDER, mod_csi[symb+1]);
if ((csi_params.row == 14) || (csi_params.row == 13) || (csi_params.row == 16) || (csi_params.row == 17)) {
symb = csi_params.symb_l1;
nr_modulation(gold_csi_rs[symb+lp], csi_length, DMRS_MOD_ORDER, mod_csi[symb+lp]);
if ((csi_params.row == 13) || (csi_params.row == 16))
nr_modulation(gold_csi_rs[symb+1], csi_length, DMRS_MOD_ORDER, mod_csi[symb+1]);
}
}
}
// 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
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
// wf according to tables 7.4.5.3-2 to 7.4.5.3-5
if (kp == 0)
wf = 1;
else
wf = -2*(s%2)+1;
na = n*alpha;
kpn = (rho*koverline[ji])/NR_NB_SC_PER_RB;
mprime = na + kp + kpn; // sequence index
for (lp=0; lp<=lprime; lp++) { // loop over frequency resource elements within a group
l = lp + loverline[ji];
// wt according to tables 7.4.5.3-2 to 7.4.5.3-5
if (s < 2)
wt = 1;
else if (s < 4)
wt = -2*(lp%2)+1;
else if (s < 6)
wt = -2*(lp/2)+1;
else {
if ((lp == 0) || (lp == 3))
wt = 1;
else
wt = -1;
}
// 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;
}
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;
}
}
}
}
}
}
}
return 0;
}
openair1/PHY/NR_TRANSPORT/nr_transport_proto.h
View file @ d986d8bf
......@@ -329,7 +329,7 @@ void free_nr_ru_prach_entry(RU_t *ru, int prach_id);
int nr_generate_csi_rs(uint32_t **gold_csi_rs,
int32_t *txdataF,
NR_DL_FRAME_PARMS frame_parms,
nfapi_nr_config_request_t config);
nfapi_nr_csi_rs_pdu_t csi_params);
void nr_decode_pucch1(int32_t **rxdataF,
pucch_GroupHopping_t pucch_GroupHopping,
......
openair1/PHY/defs_nr_common.h
View file @ d986d8bf
......@@ -82,8 +82,8 @@
#define NR_MAX_PDSCH_DMRS_LENGTH 3300 //275*6(k)*2(QPSK real+imag)
#define NR_MAX_PDSCH_DMRS_INIT_LENGTH_DWORD 104 // ceil(NR_MAX_PDSCH_DMRS_LENGTH/32)
#define NR_MAX_CSI_RS_LENGTH 5500 //275*10(max allocation per RB)*2(QPSK)
#define NR_MAX_CSI_RS_INIT_LENGTH_DWORD 172 // ceil(NR_MAX_CSI_RS_LENGTH/32)
#define NR_MAX_CSI_RS_LENGTH 4400 //275*8(max allocation per RB)*2(QPSK)
#define NR_MAX_CSI_RS_INIT_LENGTH_DWORD 138 // ceil(NR_MAX_CSI_RS_LENGTH/32)
#define NR_MAX_PUSCH_DMRS_LENGTH NR_MAX_PDSCH_DMRS_LENGTH
#define NR_MAX_PUSCH_DMRS_INIT_LENGTH_DWORD NR_MAX_PDSCH_DMRS_INIT_LENGTH_DWORD
......
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