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Commit 4ab9c755 authored by Florian Kaltenberger's avatar Florian Kaltenberger
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first version of PRACH for FR2. to be tested

parent bddd86b7
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Showing with 355 additions and 176 deletions
openair1/PHY/INIT/nr_init.c
View file @ 4ab9c755
......@@ -433,10 +433,17 @@ void nr_phy_config_request_sim(PHY_VARS_gNB *gNB,
//gNB_config->subframe_config.dl_cyclic_prefix_type.value = (fp->Ncp == NORMAL) ? NFAPI_CP_NORMAL : NFAPI_CP_EXTENDED;
gNB->mac_enabled = 1;
if (mu==1) {
fp->dl_CarrierFreq = 3500000000;//from_nrarfcn(gNB_config->nfapi_config.rf_bands.rf_band[0],gNB_config->nfapi_config.nrarfcn.value);
fp->ul_CarrierFreq = 3500000000;//fp->dl_CarrierFreq - (get_uldl_offset(gNB_config->nfapi_config.rf_bands.rf_band[0])*100000);
fp->nr_band = 78;
// fp->threequarter_fs= 0;
// fp->threequarter_fs= 0;
} else if (mu==3) {
fp->dl_CarrierFreq = 27524520000;//from_nrarfcn(gNB_config->nfapi_config.rf_bands.rf_band[0],gNB_config->nfapi_config.nrarfcn.value);
fp->ul_CarrierFreq = 27524520000;//fp->dl_CarrierFreq - (get_uldl_offset(gNB_config->nfapi_config.rf_bands.rf_band[0])*100000);
fp->nr_band = 261;
// fp->threequarter_fs= 0;
}
gNB_config->carrier_config.dl_bandwidth.value = config_bandwidth(mu, N_RB_DL, fp->nr_band);
......
openair1/PHY/NR_TRANSPORT/nr_prach.c
View file @ 4ab9c755
......@@ -188,7 +188,7 @@ void rx_nr_prach_ru(RU_t *ru,
prach[aa] = (int16_t*)&ru->common.rxdata[aa][(slot2*fp->get_samples_per_slot(slot,fp))+sample_offset_slot-ru->N_TA_offset];
}
idft_size_idx_t dftsize;
int dftlen=0;
int mu = fp->numerology_index;
int Ncp = 0;
......@@ -269,7 +269,8 @@ void rx_nr_prach_ru(RU_t *ru,
if (LOG_DEBUGFLAG(PRACH)) {
LOG_D(PHY,"rx_prach: Doing PRACH FFT for nb_rx:%d Ncp:%d\n",ru->nb_rx, Ncp);
}
AssertFatal(mu==1,"only 30 kHz SCS handled for now\n");
// Note: Assumes PUSCH SCS @ 30 kHz, take values for formats 0-2 and adjust for others below
int kbar = 1;
......@@ -299,6 +300,7 @@ void rx_nr_prach_ru(RU_t *ru,
AssertFatal(prach[aa]!=NULL,"prach[%d] is null\n",aa);
// do DFT
if (mu==1) {
if (fp->N_RB_UL <= 100)
AssertFatal(1==0,"N_RB_UL %d not support for NR PRACH yet\n",fp->N_RB_UL);
else if (fp->N_RB_UL < 137) {
......@@ -327,12 +329,9 @@ void rx_nr_prach_ru(RU_t *ru,
}
}// 839 sequence
else {
if ((mu==0 &&
(prachStartSymbol == 0 || prachStartSymbol == 7)) ||
(mu==1 && prachStartSymbol == 0)) prach2+=64; // 32 samples @ 61.44 Ms/s in first symbol of each half subframe (15/30 kHz only)
if (prachStartSymbol == 0)
prach2+=64; // 32 samples @ 61.44 Ms/s in first symbol of each half subframe (15/30 kHz only)
if (mu==0) AssertFatal(1==0,"Shouldn't get here\n");
else if (mu==1) {
dftlen=2048;
dft(DFT_2048,prach2,rxsigF[aa],1);
if (prachFormat != 9/*C0*/) {
......@@ -354,10 +353,6 @@ void rx_nr_prach_ru(RU_t *ru,
reps+=6;
}
}
else if (mu==2) AssertFatal(1==0,"Shouldn't get here\n");
else if (mu==3) AssertFatal(1==0,"Shouldn't get here\n");
else if (mu==4) AssertFatal(1==0,"Shouldn't get here\n");
}
} else { // threequarter sampling
// 40 MHz @ 46.08 Ms/s
prach2 = prach[aa] + (3*Ncp); // 46.08 is 1.5 * 30.72, times 2 for I/Q
......@@ -383,11 +378,7 @@ void rx_nr_prach_ru(RU_t *ru,
reps=4;
}
} else {
if ((mu==0 &&
(prachStartSymbol == 0 || prachStartSymbol == 7)) ||
(mu==1 && prachStartSymbol == 0)) prach2+=48; // 24 samples @ 46.08 Ms/s in first symbol of each half subframe (15/30 kHz only)
if (mu==0) AssertFatal(1==0,"Shouldn't get here\n");
else if (mu==1) {
if (prachStartSymbol == 0) prach2+=48; // 24 samples @ 46.08 Ms/s in first symbol of each half subframe (15/30 kHz only)
dftlen=1536;
dft(DFT_1536,prach2,rxsigF[aa],1);
if (prachFormat != 9/*C0*/) {
......@@ -409,10 +400,6 @@ void rx_nr_prach_ru(RU_t *ru,
for (int i=6;i<12;i++) dft(DFT_1536,prach2+(3072*i),rxsigF[aa]+(3072*i),1);
reps+=6;
}
}// mu==1
else if (mu==2) AssertFatal(1==0,"Shouldn't get here\n");
else if (mu==3) AssertFatal(1==0,"Shouldn't get here\n");
else if (mu==4) AssertFatal(1==0,"Shouldn't get here\n");
} // short format
} // 3/4 sampling
} // <=50 MHz BW
......@@ -442,12 +429,8 @@ void rx_nr_prach_ru(RU_t *ru,
}
}
else {
if ((mu==0 &&
(prachStartSymbol == 0 || prachStartSymbol == 7)) ||
(mu==1 && prachStartSymbol == 0)) prach2+=128; // 64 samples @ 122.88 Ms/s in first symbol of each half subframe (15/30 kHz only)
if (prachStartSymbol == 0) prach2+=128; // 64 samples @ 122.88 Ms/s in first symbol of each half subframe (15/30 kHz only)
if (mu==0) AssertFatal(1==0,"Shouldn't get here\n");
else if (mu==1) {
dftlen=4096;
dft(DFT_4096,prach2,rxsigF[aa],1);
if (prachFormat != 9/*C0*/) {
......@@ -470,10 +453,6 @@ void rx_nr_prach_ru(RU_t *ru,
reps+=6;
}
}
else if (mu==2) AssertFatal(1==0,"Shouldn't get here\n");
else if (mu==3) AssertFatal(1==0,"Shouldn't get here\n");
else if (mu==4) AssertFatal(1==0,"Shouldn't get here\n");
}
} else {
AssertFatal(fp->N_RB_UL <= 217,"cannot do more than 217 PRBs with 3/4 sampling\n");
prach2 = prach[aa] + (6*Ncp);
......@@ -494,12 +473,8 @@ void rx_nr_prach_ru(RU_t *ru,
reps=4;
}
} else {
if ((mu==0 &&
(prachStartSymbol == 0 || prachStartSymbol == 7)) ||
(mu==1 && prachStartSymbol == 0)) prach2+=96; // 64 samples @ 122.88 Ms/s in first symbol of each half subframe (15/30 kHz only)
if (prachStartSymbol == 0) prach2+=96; // 64 samples @ 122.88 Ms/s in first symbol of each half subframe (15/30 kHz only)
if (mu==0) AssertFatal(1==0,"Shouldn't get here\n");
else if (mu==1) {
dftlen=3072;
dft(DFT_3072,prach2,rxsigF[aa],1);
if (prachFormat != 9/*C0*/) {
......@@ -522,12 +497,60 @@ void rx_nr_prach_ru(RU_t *ru,
reps+=6;
}
}
else if (mu==2) AssertFatal(1==0,"Shouldn't get here\n");
else if (mu==3) AssertFatal(1==0,"Shouldn't get here\n");
else if (mu==4) AssertFatal(1==0,"Shouldn't get here\n");
}
}
}
else if (mu==3) {
if (fp->threequarter_fs) {
AssertFatal(1==0,"3/4 sampling not supported for numerology %d\n",mu);
}
if (prach_sequence_length == 0) {
AssertFatal(1==0,"long prach not supported for numerology %d\n",mu);
}
if (fp->N_RB_UL == 32) {
prach2 = prach[aa] + (Ncp<<2); // Ncp is for 30.72 Ms/s, so multiply by 2 for I/Q, and 2 for 61.44Msps
if (slot%(fp->slots_per_subframe/2)==0 && prachStartSymbol == 0)
prach2+=64; // 32 samples @ 61.44 Ms/s in first symbol of each half subframe
dftlen=512;
dftsize = IDFT_512;
}
else if (fp->N_RB_UL == 66) {
prach2 = prach[aa] + (Ncp<<3); // Ncp is for 30.72 Ms/s, so multiply by 4 for I/Q, and 2 for 122.88Msps
if (slot%(fp->slots_per_subframe/2)==0 && prachStartSymbol == 0)
prach2+=128; // 64 samples @ 122.88 Ms/s in first symbol of each half subframe
dftlen=1024;
dftsize = IDFT_1024;
}
else {
AssertFatal(1==0,"N_RB_UL %d not support for numerology %d\n",fp->N_RB_UL,mu);
}
dft(dftsize,prach2,rxsigF[aa],1);
if (prachFormat != 9/*C0*/) {
dft(dftsize,prach2+dftlen*2,rxsigF[aa]+dftlen*2,1);
reps++;
}
if (prachFormat == 5/*A2*/ || prachFormat == 6/*A3*/|| prachFormat == 8/*B4*/ || prachFormat == 10/*C2*/) {
dft(dftsize,prach2+dftlen*4,rxsigF[aa]+dftlen*4,1);
dft(dftsize,prach2+dftlen*6,rxsigF[aa]+dftlen*6,1);
reps+=2;
}
if (prachFormat == 6/*A3*/ || prachFormat == 8/*B4*/) {
dft(dftsize,prach2+dftlen*8,rxsigF[aa]+dftlen*8,1);
dft(dftsize,prach2+dftlen*10,rxsigF[aa]+dftlen*10,1);
reps+=2;
}
if (prachFormat == 8/*B4*/) {
for (int i=6;i<12;i++)
dft(dftsize,prach2+(dftlen*2*i),rxsigF[aa]+(dftlen*2*i),1);
reps+=6;
}
}
else {
AssertFatal(1==0,"Numerology not supported\n");
}
//Coherent combining of PRACH repetitions (assumes channel does not change, to be revisted for "long" PRACH)
LOG_D(PHY,"Doing PRACH combining of %d reptitions N_ZC %d\n",reps,N_ZC);
......
openair1/PHY/NR_UE_TRANSPORT/nr_prach.c
View file @ 4ab9c755
......@@ -241,6 +241,7 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
*
*********************************************************/
if (mu==1) {
if (fp->N_RB_UL <= 100)
AssertFatal(1 == 0, "N_RB_UL %d not support for NR PRACH yet\n", fp->N_RB_UL);
else if (fp->N_RB_UL < 137) {
......@@ -321,6 +322,22 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
}
}
}
}
else if (mu==3) {
if (fp->threequarter_fs)
AssertFatal(1==0,"3/4 sampling not supported for numerology %d\n",mu);
if (prach_sequence_length == 0)
AssertFatal(1==0,"long prach not supported for numerology %d\n",mu);
if (fp->N_RB_UL == 32)
dftlen=512;
else if (fp->N_RB_UL == 66)
dftlen=1024;
else
AssertFatal(1==0,"N_RB_UL %d not support for numerology %d\n",fp->N_RB_UL,mu);
}
for (offset=0,offset2=0; offset<N_ZC; offset++,offset2+=preamble_shift) {
......@@ -344,6 +361,7 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
AssertFatal(prach_fmt_id < 4, "Illegal PRACH format %d for sequence length 839\n", prach_fmt_id);
// Ncp here is given in terms of T_s wich is 30.72MHz sampling
switch (prach_fmt_id) {
case 0:
Ncp = 3168;
......@@ -401,13 +419,149 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
LOG_D(PHY, "PRACH [UE %d] Ncp %d, dftlen %d \n", Mod_id, Ncp, dftlen);
#endif
if (fp->N_RB_UL <= 100)
AssertFatal(1==0,"N_RB_UL %d not supported for NR PRACH yet\n",fp->N_RB_UL);
//actually what we should be checking here is how often the current prach crosses a 0.5ms boundary. I am not quite sure for which paramter set this would be the case, so I will ignore it for now and just check if the prach starts on a 0.5ms boundary
uint8_t use_extended_prach_prefix = 0;
if(fp->numerology_index == 0) {
if (prachStartSymbol == 0 || prachStartSymbol == 7)
use_extended_prach_prefix = 1;
}
else {
if (slot%(fp->slots_per_subframe/2)==0 && prachStartSymbol == 0)
use_extended_prach_prefix = 1;
}
if (fp->N_RB_UL <= 34) { //32 PRB case 61.44Msps
if (fp->threequarter_fs == 0) {
Ncp<<=1; //to account for 61.44Mbps
// This is after cyclic prefix
prach2 = prach+(Ncp<<1); //times 2 for complex samples
if (prach_sequence_length == 0)
AssertFatal(1==0,"no long PRACH for this PRACH size %d\n",fp->N_RB_UL);
else {
if (use_extended_prach_prefix)
Ncp+=32; // 16*kappa, kappa=2 for 61.44Msps
prach2 = prach+(Ncp<<1); //times 2 for complex samples
if (prach_fmt_id == 4 || prach_fmt_id == 7 || prach_fmt_id == 9) {
idft(IDFT_512,prachF,prach2,1);
// here we have |empty | Prach512 |
if (prach_fmt_id != 9) {
memmove(prach2+(512<<1),prach2,(512<<2));
prach_len = (512*2)+Ncp;
}
else prach_len = (512*1)+Ncp;
memmove(prach,prach+(512<<1),(Ncp<<2));
// here we have |Prefix | Prach512 | Prach512 (if ! 0xc0) |
} else if (prach_fmt_id == 5) { // 6x512
idft(IDFT_512,prachF,prach2,1);
// here we have |empty | Prach512 |
memmove(prach2+(512<<1),prach2,(512<<2));
// here we have |empty | Prach512 | Prach512| empty512 | empty512 |
memmove(prach2+(512<<2),prach2,(512<<3));
// here we have |empty | Prach512 | Prach512| Prach512 | Prach512 |
memmove(prach,prach+(512<<1),(Ncp<<2));
// here we have |Prefix | Prach512 |
prach_len = (512*4)+Ncp;
} else if (prach_fmt_id == 6) { // 6x512
idft(IDFT_512,prachF,prach2,1);
// here we have |empty | Prach512 |
memmove(prach2+(512<<1),prach2,(512<<2));
// here we have |empty | Prach512 | Prach512| empty512 | empty512 | empty512 | empty512
memmove(prach2+(512<<2),prach2,(512<<3));
// here we have |empty | Prach512 | Prach512| Prach512 | Prach512 | empty512 | empty512
memmove(prach2+(512<<3),prach2,(512<<3));
// here we have |empty | Prach512 | Prach512| Prach512 | Prach512 | Prach512 | Prach512
memmove(prach,prach+(512<<1),(Ncp<<2));
// here we have |Prefix | Prach512 |
prach_len = (512*6)+Ncp;
} else if (prach_fmt_id == 8) { // 12x512
idft(IDFT_512,prachF,prach2,1);
// here we have |empty | Prach512 |
memmove(prach2+(512<<1),prach2,(512<<2));
// here we have |empty | Prach512 | Prach512| empty512 | empty512 | empty512 | empty512
memmove(prach2+(512<<2),prach2,(512<<3));
// here we have |empty | Prach512 | Prach512| Prach512 | Prach512 | empty512 | empty512
memmove(prach2+(512<<3),prach2,(512<<3));
// here we have |empty | Prach512 | Prach512| Prach512 | Prach512 | Prach512 | Prach512
memmove(prach2+(512<<1)*6,prach2,(512<<2)*6);
// here we have |empty | Prach512 | Prach512| Prach512 | Prach512 | Prach512 | Prach512 | Prach512 | Prach512| Prach512 | Prach512 | Prach512 | Prach512|
memmove(prach,prach+(512<<1),(Ncp<<2));
// here we have |Prefix | Prach512 | Prach512| Prach512 | Prach512 | Prach512 | Prach512 | Prach512 | Prach512| Prach512 | Prach512 | Prach512 | Prach512|
prach_len = (512*12)+Ncp;
}
}
}
else
AssertFatal(1==0,"3/4 sampling not supported for this PRACH size %d\n",fp->N_RB_UL);
}
else if (fp->N_RB_UL <= 68) {//66 PRB case, 122.88 Msps
if (fp->threequarter_fs == 0) {
Ncp<<=2; //to account for 122.88Mbps
// This is after cyclic prefix
prach2 = prach+(Ncp<<1); //times 2 for complex samples
if (prach_sequence_length == 0)
AssertFatal(1==0,"no long PRACH for this PRACH size %d\n",fp->N_RB_UL);
else {
if (use_extended_prach_prefix)
Ncp+=64; // 16*kappa, kappa=4 for 122.88Msps
prach2 = prach+(Ncp<<1); //times 2 for complex samples
if (prach_fmt_id == 4 || prach_fmt_id == 7 || prach_fmt_id == 9) {
idft(IDFT_1024,prachF,prach2,1);
// here we have |empty | Prach1024 |
if (prach_fmt_id != 9) {
memmove(prach2+(1024<<1),prach2,(1024<<2));
prach_len = (1024*2)+Ncp;
}
else prach_len = (1024*1)+Ncp;
memmove(prach,prach+(1024<<1),(Ncp<<2));
// here we have |Prefix | Prach1024 | Prach1024 (if ! 0xc0) |
} else if (prach_fmt_id == 5) { // 6x1024
idft(IDFT_1024,prachF,prach2,1);
// here we have |empty | Prach1024 |
memmove(prach2+(1024<<1),prach2,(1024<<2));
// here we have |empty | Prach1024 | Prach1024| empty1024 | empty1024 |
memmove(prach2+(1024<<2),prach2,(1024<<3));
// here we have |empty | Prach1024 | Prach1024| Prach1024 | Prach1024 |
memmove(prach,prach+(1024<<1),(Ncp<<2));
// here we have |Prefix | Prach1024 |
prach_len = (1024*4)+Ncp;
} else if (prach_fmt_id == 6) { // 6x1024
idft(IDFT_1024,prachF,prach2,1);
// here we have |empty | Prach1024 |
memmove(prach2+(1024<<1),prach2,(1024<<2));
// here we have |empty | Prach1024 | Prach1024| empty1024 | empty1024 | empty1024 | empty1024
memmove(prach2+(1024<<2),prach2,(1024<<3));
// here we have |empty | Prach1024 | Prach1024| Prach1024 | Prach1024 | empty1024 | empty1024
memmove(prach2+(1024<<3),prach2,(1024<<3));
// here we have |empty | Prach1024 | Prach1024| Prach1024 | Prach1024 | Prach1024 | Prach1024
memmove(prach,prach+(1024<<1),(Ncp<<2));
// here we have |Prefix | Prach1024 |
prach_len = (1024*6)+Ncp;
} else if (prach_fmt_id == 8) { // 12x1024
idft(IDFT_1024,prachF,prach2,1);
// here we have |empty | Prach1024 |
memmove(prach2+(1024<<1),prach2,(1024<<2));
// here we have |empty | Prach1024 | Prach1024| empty1024 | empty1024 | empty1024 | empty1024
memmove(prach2+(1024<<2),prach2,(1024<<3));
// here we have |empty | Prach1024 | Prach1024| Prach1024 | Prach1024 | empty1024 | empty1024
memmove(prach2+(1024<<3),prach2,(1024<<3));
// here we have |empty | Prach1024 | Prach1024| Prach1024 | Prach1024 | Prach1024 | Prach1024
memmove(prach2+(1024<<1)*6,prach2,(1024<<2)*6);
// here we have |empty | Prach1024 | Prach1024| Prach1024 | Prach1024 | Prach1024 | Prach1024 | Prach1024 | Prach1024| Prach1024 | Prach1024 | Prach1024 | Prach1024|
memmove(prach,prach+(1024<<1),(Ncp<<2));
// here we have |Prefix | Prach1024 | Prach1024| Prach1024 | Prach1024 | Prach1024 | Prach1024 | Prach1024 | Prach1024| Prach1024 | Prach1024 | Prach1024 | Prach1024|
prach_len = (1024*12)+Ncp;
}
}
}
else
AssertFatal(1==0,"3/4 sampling not supported for this PRACH size %d\n",fp->N_RB_UL);
}
else if (fp->N_RB_UL < 137) { // 46.08 or 61.44 Ms/s
if (fp->threequarter_fs == 0) { // full sampling @ 61.44 Ms/s
Ncp<<=1;
// This is after cyclic prefix (Ncp<<1 samples for 30.72 Ms/s, Ncp<<2 samples for 61.44 Ms/s
prach2 = prach+(Ncp<<1);
Ncp<<=1; //to account for 61.44Mbps
// This is after cyclic prefix
prach2 = prach+(Ncp<<1); //times 2 for complex samples
if (prach_sequence_length == 0){
if (prach_fmt_id == 0) { //24576 samples @ 30.72 Ms/s, 49152 samples @ 61.44 Ms/s
idft(IDFT_49152,prachF,prach2,1);
......@@ -442,9 +596,10 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
prach_len = (12288*4)+Ncp;
}
} else { // short PRACH sequence
if (use_extended_prach_prefix)
Ncp+=32; // 16*kappa, kappa=2 for 61.44Msps
prach2 = prach+(Ncp<<1); //times 2 for complex samples
if (prach_fmt_id == 4 || prach_fmt_id == 7 || prach_fmt_id == 9) {
Ncp+=32; // This assumes we are transmitting starting in symbol 0 of a PRACH slot, 30 kHz, full sampling
prach2 = prach+(Ncp<<1);
idft(IDFT_2048,prachF,prach2,1);
// here we have |empty | Prach2048 |
if (prach_fmt_id != 9) {
......@@ -455,8 +610,6 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
memmove(prach,prach+(2048<<1),(Ncp<<2));
// here we have |Prefix | Prach2048 | Prach2048 (if ! 0xc0) |
} else if (prach_fmt_id == 5) { // 6x2048
Ncp+=32; // This assumes we are transmitting starting in symbol 0 of a PRACH slot, 30 kHz, full sampling
prach2 = prach+(Ncp<<1);
idft(IDFT_2048,prachF,prach2,1);
// here we have |empty | Prach2048 |
memmove(prach2+(2048<<1),prach2,(2048<<2));
......@@ -467,8 +620,6 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
// here we have |Prefix | Prach2048 |
prach_len = (2048*4)+Ncp;
} else if (prach_fmt_id == 6) { // 6x2048
Ncp+=32;
prach2 = prach+(Ncp<<1);
idft(IDFT_2048,prachF,prach2,1);
// here we have |empty | Prach2048 |
memmove(prach2+(2048<<1),prach2,(2048<<2));
......@@ -481,8 +632,6 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
// here we have |Prefix | Prach2048 |
prach_len = (2048*6)+Ncp;
} else if (prach_fmt_id == 8) { // 12x2048
Ncp+=32; // This assumes we are transmitting starting in symbol 0 of a PRACH slot, 30 kHz, full sampling
prach2 = prach+(Ncp<<1);
idft(IDFT_2048,prachF,prach2,1);
// here we have |empty | Prach2048 |
memmove(prach2+(2048<<1),prach2,(2048<<2));
......@@ -535,9 +684,10 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
prach_len = (9216*4)+Ncp;
}
} else { // short sequence
if (use_extended_prach_prefix)
Ncp+=24; // 16*kappa, kappa=1.5 for 46.08Msps
prach2 = prach+(Ncp<<1); //times 2 for complex samples
if (prach_fmt_id == 4 || prach_fmt_id == 7 || prach_fmt_id == 9) {
Ncp+=24; // This assumes we are transmitting starting in symbol 0 of a PRACH slot, 30 kHz, full sampling
prach2 = prach+(Ncp<<1);
idft(IDFT_1536,prachF,prach2,1);
// here we have |empty | Prach1536 |
if (prach_fmt_id != 9) {
......@@ -549,9 +699,6 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
// here we have |Prefix | Prach1536 | Prach1536 (if ! 0xc0) |
} else if (prach_fmt_id == 5) { // 6x1536
Ncp+=24; // This assumes we are transmitting starting in symbol 0 of a PRACH slot, 30 kHz, full sampling
prach2 = prach+(Ncp<<1);
idft(IDFT_1536,prachF,prach2,1);
// here we have |empty | Prach1536 |
memmove(prach2+(1536<<1),prach2,(1536<<2));
......@@ -562,8 +709,6 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
// here we have |Prefix | Prach1536 |
prach_len = (1536*4)+Ncp;
} else if (prach_fmt_id == 6) { // 6x1536
Ncp+=24; // This assumes we are transmitting starting in symbol 0 of a PRACH slot, 30 kHz, full sampling
prach2 = prach+(Ncp<<1);
idft(IDFT_1536,prachF,prach2,1);
// here we have |empty | Prach1536 |
memmove(prach2+(1536<<1),prach2,(1536<<2));
......@@ -576,8 +721,6 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
// here we have |Prefix | Prach1536 |
prach_len = (1536*6)+Ncp;
} else if (prach_fmt_id == 8) { // 12x1536
Ncp+=24; // This assumes we are transmitting starting in symbol 0 of a PRACH slot, 30 kHz, full sampling
prach2 = prach+(Ncp<<1);
idft(IDFT_1536,prachF,prach2,1);
// here we have |empty | Prach1536 |
memmove(prach2+(1536<<1),prach2,(1536<<2));
......@@ -596,8 +739,9 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
}
} else if (fp->N_RB_UL <= 273) {// 92.16 or 122.88 Ms/s
if (fp->threequarter_fs == 0) { // full sampling @ 122.88 Ms/s
Ncp<<=2;
prach2 = prach+(Ncp<<1);
Ncp<<=2; //to account for 122.88Mbps
// This is after cyclic prefix
prach2 = prach+(Ncp<<1); //times 2 for complex samples
if (prach_sequence_length == 0){
if (prach_fmt_id == 0) { //24576 samples @ 30.72 Ms/s, 98304 samples @ 122.88 Ms/s
idft(IDFT_98304,prachF,prach2,1);
......@@ -632,9 +776,10 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
prach_len = (24576*4)+Ncp;
}
} else { // short sequence
if (use_extended_prach_prefix)
Ncp+=64; // 16*kappa, kappa=4 for 122.88Msps
prach2 = prach+(Ncp<<1); //times 2 for complex samples
if (prach_fmt_id == 4 || prach_fmt_id == 7 || prach_fmt_id == 9) {
Ncp+=64; // This assumes we are transmitting starting in symbol 0 of a PRACH slot, 30 kHz, full sampling
prach2 = prach+(Ncp<<1);
idft(IDFT_4096,prachF,prach2,1);
// here we have |empty | Prach4096 |
if (prach_fmt_id != 9) {
......@@ -644,8 +789,6 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
memmove(prach,prach+(4096<<1),(Ncp<<2));
// here we have |Prefix | Prach4096 | Prach4096 (if ! 0xc0) |
} else if (prach_fmt_id == 5) { // 4x4096
Ncp+=64; // This assumes we are transmitting starting in symbol 0 of a PRACH slot, 30 kHz, full sampling
prach2 = prach+(Ncp<<1);
idft(IDFT_4096,prachF,prach2,1);
// here we have |empty | Prach4096 |
memmove(prach2+(4096<<1),prach2,(4096<<2));
......@@ -656,8 +799,6 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
// here we have |Prefix | Prach4096 |
prach_len = (4096*4)+Ncp;
} else if (prach_fmt_id == 6) { // 6x4096
Ncp+=64; // This assumes we are transmitting starting in symbol 0 of a PRACH slot, 30 kHz, full sampling
prach2 = prach+(Ncp<<1);
idft(IDFT_4096,prachF,prach2,1);
// here we have |empty | Prach4096 |
memmove(prach2+(4096<<1),prach2,(4096<<2));
......@@ -670,8 +811,6 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
// here we have |Prefix | Prach4096 |
prach_len = (4096*6)+Ncp;
} else if (prach_fmt_id == 8) { // 12x4096
Ncp+=64; // This assumes we are transmitting starting in symbol 0 of a PRACH slot, 30 kHz, full sampling
prach2 = prach+(Ncp<<1);
idft(IDFT_4096,prachF,prach2,1);
// here we have |empty | Prach4096 |
memmove(prach2+(4096<<1),prach2,(4096<<2));
......@@ -688,8 +827,8 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
}
}
} else { // three quarter sampling @ 92.16 Ms/s
Ncp = (Ncp*3);
prach2 = prach+(Ncp<<1);
Ncp = (Ncp*3); //to account for 92.16 Msps
prach2 = prach+(Ncp<<1); //times 2 for complex samples
if (prach_sequence_length == 0){
if (prach_fmt_id == 0) {
idft(IDFT_73728,prachF,prach2,1);
......@@ -724,9 +863,10 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
prach_len = (18432*4)+Ncp;
}
} else { // short sequence
if (use_extended_prach_prefix)
Ncp+=48; // 16*kappa, kappa=3 for 92.16Msps
prach2 = prach+(Ncp<<1); //times 2 for complex samples
if (prach_fmt_id == 4 || prach_fmt_id == 7 || prach_fmt_id == 9) {
Ncp+=48; // This assumes we are transmitting starting in symbol 0 of a PRACH slot, 30 kHz, full sampling
prach2 = prach+(Ncp<<1);
idft(IDFT_3072,prachF,prach2,1);
// here we have |empty | Prach3072 |
if (prach_fmt_id != 9) {
......@@ -736,8 +876,6 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
memmove(prach,prach+(3072<<1),(Ncp<<2));
// here we have |Prefix | Prach3072 | Prach3072 (if ! 0xc0) |
} else if (prach_fmt_id == 6) { // 6x3072
Ncp+=48; // This assumes we are transmitting starting in symbol 0 of a PRACH slot, 30 kHz, full sampling
prach2 = prach+(Ncp<<1);
idft(IDFT_3072,prachF,prach2,1);
// here we have |empty | Prach3072 |
memmove(prach2+(3072<<1),prach2,(3072<<2));
......@@ -750,8 +888,6 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
// here we have |Prefix | Prach3072 |
prach_len = (3072*6)+Ncp;
} else if (prach_fmt_id == 5) { // 4x3072
Ncp+=48; // This assumes we are transmitting starting in symbol 0 of a PRACH slot, 30 kHz, full sampling
prach2 = prach+(Ncp<<1);
idft(IDFT_3072,prachF,prach2,1);
// here we have |empty | Prach3072 |
memmove(prach2+(3072<<1),prach2,(3072<<2));
......@@ -762,8 +898,6 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
// here we have |Prefix | Prach3072 |
prach_len = (3072*4)+Ncp;
} else if (prach_fmt_id == 6) { // 12x3072
Ncp+=48; // This assumes we are transmitting starting in symbol 0 of a PRACH slot, 30 kHz, full sampling
prach2 = prach+(Ncp<<1);
idft(IDFT_3072,prachF,prach2,1);
// here we have |empty | Prach3072 |
memmove(prach2+(3072<<1),prach2,(3072<<2));
......
openair1/SIMULATION/NR_PHY/prachsim.c
View file @ 4ab9c755
......@@ -151,7 +151,7 @@ int main(int argc, char **argv){
randominit(0);
while ((c = getopt (argc, argv, "hHaA:Cc:r:p:g:n:s:S:t:x:y:v:V:z:N:F:d:Z:L:R:E")) != -1) {
while ((c = getopt (argc, argv, "hHaA:Cc:r:p:g:m:n:s:S:t:x:y:v:V:z:N:F:d:Z:L:R:E")) != -1) {
switch (c) {
case 'a':
printf("Running AWGN simulation\n");
......@@ -241,6 +241,10 @@ int main(int argc, char **argv){
threequarter_fs=1;
break;
case 'm':
mu = atoi(optarg);
break;
case 'n':
n_frames = atoi(optarg);
break;
......@@ -369,9 +373,8 @@ int main(int argc, char **argv){
}
if (config_index<67) { prach_sequence_length=0; slot = subframe*2; slot_gNB = 1+(subframe*2); }
uint16_t N_ZC;
N_ZC = prach_sequence_length == 0 ? 839 : 139;
if (config_index<67 && mu==1) { prach_sequence_length=0; slot = subframe*2; slot_gNB = 1+(subframe*2); }
uint16_t N_ZC = prach_sequence_length == 0 ? 839 : 139;
printf("Config_index %d, prach_sequence_length %d\n",config_index,prach_sequence_length);
......@@ -414,6 +417,11 @@ int main(int argc, char **argv){
nr_phy_config_request_sim(gNB, N_RB_UL, N_RB_UL, mu, Nid_cell, SSB_positions);
absoluteFrequencyPointA = to_nrarfcn(frame_parms->nr_band,
frame_parms->dl_CarrierFreq,
frame_parms->numerology_index,
frame_parms->N_RB_UL*(180e3)*(1 << frame_parms->numerology_index));
//nsymb = (frame_parms->Ncp == 0) ? 14 : 12;
printf("FFT Size %d, Extended Prefix %d, Samples per subframe %d, Frame type %s, Frequency Range %s\n",
......@@ -430,7 +438,14 @@ int main(int argc, char **argv){
gNB->gNB_config.carrier_config.num_tx_ant.value = 1;
gNB->gNB_config.carrier_config.num_rx_ant.value = 1;
if (mu==1)
gNB->gNB_config.tdd_table.tdd_period.value = 6;
else if (mu==3)
gNB->gNB_config.tdd_table.tdd_period.value = 3;
else {
printf("unsupported numerology %d\n",mu);
exit(-1);
}
gNB->gNB_config.prach_config.num_prach_fd_occasions.value = num_prach_fd_occasions;
gNB->gNB_config.prach_config.num_prach_fd_occasions_list = (nfapi_nr_num_prach_fd_occasions_t *) malloc(num_prach_fd_occasions*sizeof(nfapi_nr_num_prach_fd_occasions_t));
......
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