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Commit 6f2b2eeb authored by Matthieu Kanj's avatar Matthieu Kanj
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optimization of NPUSCH

parent ee93a7ba
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openair1/PHY/LTE_TRANSPORT/proto_NB_IoT.h
View file @ 6f2b2eeb
...@@ -358,7 +358,28 @@ int32_t dlsch_encoding_NB_IoT(unsigned char *a, ...@@ -358,7 +358,28 @@ int32_t dlsch_encoding_NB_IoT(unsigned char *a,
unsigned int G); // G (number of available RE) is implicitly multiplied by 2 (since only QPSK modulation) unsigned int G); // G (number of available RE) is implicitly multiplied by 2 (since only QPSK modulation)
void get_pilots_position(uint8_t npusch_format,uint8_t subcarrier_spacing,uint8_t *pilot_pos1,uint8_t *pilot_pos2,uint8_t *pilots_slot);
void UL_channel_estimation_NB_IoT(PHY_VARS_eNB *eNB,
LTE_DL_FRAME_PARMS *fp,
uint16_t UL_RB_ID_NB_IoT,
uint16_t Nsc_RU,
uint8_t pilot_pos1,
uint8_t pilot_pos2,
uint16_t ul_sc_start,
uint8_t Qm,
uint16_t N_SF_per_word,
uint8_t rx_subframe);
void get_llr_per_sf_NB_IoT(PHY_VARS_eNB *eNB,
LTE_DL_FRAME_PARMS *fp,
uint8_t npusch_format,
uint8_t counter_sf,
uint16_t N_SF_per_word,
uint8_t pilot_pos1,
uint8_t pilot_pos2,
uint16_t ul_sc_start,
uint16_t Nsc_RU);
uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB, uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB,
...@@ -372,7 +393,7 @@ uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB, ...@@ -372,7 +393,7 @@ uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB,
void ulsch_extract_rbs_single_NB_IoT(int32_t **rxdataF, void ulsch_extract_rbs_single_NB_IoT(int32_t **rxdataF,
int32_t **rxdataF_ext, int32_t **rxdataF_ext,
uint16_t UL_RB_ID_NB_IoT, // index of UL NB_IoT resource block !!! may be defined twice : in frame_parms and in NB_IoT_UL_eNB_HARQ_t uint16_t UL_RB_ID_NB_IoT, // index of UL NB_IoT resource block !!! may be defined twice : in frame_parms and in NB_IoT_UL_eNB_HARQ_t
uint8_t N_sc_RU, // number of subcarriers in UL uint16_t N_sc_RU, // number of subcarriers in UL
uint8_t l, uint8_t l,
uint8_t Ns, uint8_t Ns,
LTE_DL_FRAME_PARMS *frame_parms); LTE_DL_FRAME_PARMS *frame_parms);
......
openair1/PHY/LTE_TRANSPORT/ulsch_demodulation_NB_IoT.c
View file @ 6f2b2eeb
...@@ -616,7 +616,7 @@ void ulsch_detection_mrc_NB_IoT(LTE_DL_FRAME_PARMS *frame_parms, ...@@ -616,7 +616,7 @@ void ulsch_detection_mrc_NB_IoT(LTE_DL_FRAME_PARMS *frame_parms,
void ulsch_extract_rbs_single_NB_IoT(int32_t **rxdataF, void ulsch_extract_rbs_single_NB_IoT(int32_t **rxdataF,
int32_t **rxdataF_ext, int32_t **rxdataF_ext,
uint16_t UL_RB_ID_NB_IoT, // index of UL NB_IoT resource block !!! may be defined twice : in frame_parms and in NB_IoT_UL_eNB_HARQ_t uint16_t UL_RB_ID_NB_IoT, // index of UL NB_IoT resource block !!! may be defined twice : in frame_parms and in NB_IoT_UL_eNB_HARQ_t
uint8_t N_sc_RU, // number of subcarriers in UL uint16_t N_sc_RU, // number of subcarriers in UL
uint8_t l, uint8_t l,
uint8_t Ns, uint8_t Ns,
LTE_DL_FRAME_PARMS *frame_parms) LTE_DL_FRAME_PARMS *frame_parms)
...@@ -1255,91 +1255,39 @@ void ulsch_channel_level_NB_IoT(int32_t **drs_ch_estimates_ext, ...@@ -1255,91 +1255,39 @@ void ulsch_channel_level_NB_IoT(int32_t **drs_ch_estimates_ext,
#endif #endif
} }
//////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// void get_pilots_position(uint8_t npusch_format,uint8_t subcarrier_spacing,uint8_t *pilot_pos1,uint8_t *pilot_pos2,uint8_t *pilots_slot)
////////////////////////////////////////////// generalization of RX procedures //////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
int32_t llr_msg5[16];
int32_t y_msg5[16];
uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB,
eNB_rxtx_proc_t *proc,
uint8_t eNB_id, // this is the effective sector id
uint8_t UE_id,
uint16_t UL_RB_ID_NB_IoT, // 22 , to be included in // to be replaced by NB_IoT_start ??
uint8_t rx_subframe, // received subframe
uint32_t rx_frame) // received frame
{ {
LTE_eNB_PUSCH *pusch_vars = eNB->pusch_vars[UE_id];
LTE_eNB_COMMON *common_vars = &eNB->common_vars;
//NB_IoT_DL_FRAME_PARMS *frame_parms = &eNB->frame_parms;
LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
// NB_IoT_eNB_NULSCH_t **ulsch_NB_IoT = &eNB->ulsch_NB_IoT[0];//[0][0];
NB_IoT_eNB_NULSCH_t *ulsch_NB_IoT = eNB->ulsch_NB_IoT[0];
NB_IoT_UL_eNB_HARQ_t *ulsch_harq = ulsch_NB_IoT->harq_process;
if (ulsch_NB_IoT->Msg3_active == 1) uint8_t pilot_pos1_format1_15k = 3, pilot_pos2_format1_15k = 10; // holds for npusch format 1, and 15 kHz subcarrier bandwidth
{ uint8_t pilot_pos1_format2_15k = 2, pilot_pos2_format2_15k = 9; // holds for npusch format 2, and 15 kHz subcarrier bandwidth
uint8_t npusch_format = ulsch_NB_IoT->npusch_format; /// 0 or 1 -> format 1 or format 2 uint8_t pilot_pos1_format1_3_75k = 4, pilot_pos2_format1_3_75k = 11; // holds for npusch format 1, and 3.75 kHz subcarrier bandwidth
uint8_t subcarrier_spacing = ulsch_harq->subcarrier_spacing; // can be set as fix value //values are OK // 0 (3.75 KHz) or 1 (15 KHz) uint8_t pilot_pos1_format2_3_75k = 0, pilot_pos2_format2_3_75k = 7; // holds for npusch format 2, and 3.75 kHz subcarrier bandwidth
uint16_t I_sc = ulsch_harq->subcarrier_indication; // Isc =0->18 , or 0->47 // format 2, 0->3 or 0->7
uint16_t I_mcs = ulsch_harq->mcs; // values 0->10
uint16_t Nsc_RU = get_UL_N_ru_NB_IoT(I_mcs,ulsch_harq->resource_assignment,ulsch_NB_IoT->Msg3_flag);
uint16_t N_UL_slots = get_UL_slots_per_RU_NB_IoT(subcarrier_spacing,I_sc,npusch_format)*Nsc_RU; // N_UL_slots per word
uint16_t N_SF_per_word = N_UL_slots/2;
if(ulsch_NB_IoT->flag_vars == 1)
{
ulsch_NB_IoT->counter_sf = N_SF_per_word;
ulsch_NB_IoT->counter_repetitions = get_UL_N_rep_NB_IoT(ulsch_harq->repetition_number);
ulsch_NB_IoT->flag_vars = 0;
}
if(ulsch_NB_IoT->counter_sf == N_SF_per_word) // initialization for scrambling
{
ulsch_NB_IoT->Msg3_subframe = rx_subframe; // first received subframe
ulsch_NB_IoT->Msg3_frame = rx_frame; // first received frame
}
uint8_t pilot_pos1, pilot_pos2; // holds for npusch format 1, and 15 kHz subcarrier bandwidth
int16_t *llrp, *llrp2;
uint32_t l,ii=0;
uint32_t rnti_tmp = ulsch_NB_IoT->rnti;
uint16_t ul_sc_start = get_UL_sc_index_start_NB_IoT(subcarrier_spacing,I_sc,npusch_format);
uint8_t Qm = get_Qm_UL_NB_IoT(I_mcs,Nsc_RU,I_sc,ulsch_NB_IoT->Msg3_flag);
uint8_t pilot_pos1_format1_15k = 3, pilot_pos2_format1_15k = 10; // holds for npusch format 1, and 15 kHz subcarrier bandwidth
uint8_t pilot_pos1_format2_15k = 2, pilot_pos2_format2_15k = 9; // holds for npusch format 2, and 15 kHz subcarrier bandwidth
uint8_t pilot_pos1_format1_3_75k = 4, pilot_pos2_format1_3_75k = 11; // holds for npusch format 1, and 3.75 kHz subcarrier bandwidth
uint8_t pilot_pos1_format2_3_75k = 0,pilot_pos2_format2_3_75k = 7; // holds for npusch format 2, and 3.75 kHz subcarrier bandwidth
uint8_t pilots_slot =0;
//void get_pilots_position(uint8_t npusch_format,uint8_t subcarrier_spacing,pilot_pos1,pilot_pos2)
switch(npusch_format + subcarrier_spacing*2) switch(npusch_format + subcarrier_spacing*2)
{ {
case 0: // data case 0: // data
pilot_pos1 = pilot_pos1_format1_3_75k; *pilot_pos1 = pilot_pos1_format1_3_75k;
pilot_pos2 = pilot_pos2_format1_3_75k; *pilot_pos2 = pilot_pos2_format1_3_75k;
pilots_slot=1; *pilots_slot=1;
break; break;
case 1: // ACK case 1: // ACK
pilot_pos1 = pilot_pos1_format2_3_75k; *pilot_pos1 = pilot_pos1_format2_3_75k;
pilot_pos2 = pilot_pos2_format2_3_75k; *pilot_pos2 = pilot_pos2_format2_3_75k;
pilots_slot=3; *pilots_slot=3;
break; break;
case 2: // data case 2: // data
pilot_pos1 = pilot_pos1_format1_15k; *pilot_pos1 = pilot_pos1_format1_15k;
pilot_pos2 = pilot_pos2_format1_15k; *pilot_pos2 = pilot_pos2_format1_15k;
pilots_slot=1; *pilots_slot=1;
break; break;
case 3: // ACK case 3: // ACK
pilot_pos1 = pilot_pos1_format2_15k; *pilot_pos1 = pilot_pos1_format2_15k;
pilot_pos2 = pilot_pos2_format2_15k; *pilot_pos2 = pilot_pos2_format2_15k;
pilots_slot=3; *pilots_slot=3;
break; break;
default: default:
...@@ -1347,23 +1295,42 @@ uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB, ...@@ -1347,23 +1295,42 @@ uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB,
break; break;
} }
for (l=0; l<fp->symbols_per_tti; l++) }
//////////////////////////////////////////////////////////////////////////////////////
void UL_channel_estimation_NB_IoT(PHY_VARS_eNB *eNB,
LTE_DL_FRAME_PARMS *fp,
uint16_t UL_RB_ID_NB_IoT,
uint16_t Nsc_RU,
uint8_t pilot_pos1,
uint8_t pilot_pos2,
uint16_t ul_sc_start,
uint8_t Qm,
uint16_t N_SF_per_word,
uint8_t rx_subframe)
{
LTE_eNB_PUSCH *pusch_vars = eNB->pusch_vars[0]; // UE_id
LTE_eNB_COMMON *common_vars = &eNB->common_vars;
NB_IoT_eNB_NULSCH_t *ulsch_NB_IoT = eNB->ulsch_NB_IoT[0];
int l=0;
for (l=0; l<fp->symbols_per_tti; l++)
{ {
ulsch_extract_rbs_single_NB_IoT(common_vars->rxdataF[eNB_id], ulsch_extract_rbs_single_NB_IoT(common_vars->rxdataF[0], // common_vars->rxdataF[eNB_id],
pusch_vars->rxdataF_ext[eNB_id], pusch_vars->rxdataF_ext[0], // pusch_vars->rxdataF_ext[eNB_id]
UL_RB_ID_NB_IoT, //ulsch[UE_id]->harq_process->UL_RB_ID_NB_IoT, // index of UL NB_IoT resource block UL_RB_ID_NB_IoT, //ulsch[UE_id]->harq_process->UL_RB_ID_NB_IoT, // index of UL NB_IoT resource block
Nsc_RU, //1, //ulsch_NB_IoT[0]->harq_process->N_sc_RU, // number of subcarriers in UL //////////////// high level parameter Nsc_RU, //1, //ulsch_NB_IoT[0]->harq_process->N_sc_RU, // number of subcarriers in UL //////////////// high level parameter
l%(fp->symbols_per_tti/2), // (0..13) l%(fp->symbols_per_tti/2), // (0..13)
l/(fp->symbols_per_tti/2), // (0,1) l/(fp->symbols_per_tti/2), // (0,1)
fp); fp);
if(npusch_format == 0) if(ulsch_NB_IoT->npusch_format == 0) // format 1
{ {
ul_chest_tmp_NB_IoT(pusch_vars->rxdataF_ext[eNB_id], ul_chest_tmp_NB_IoT(pusch_vars->rxdataF_ext[0], // pusch_vars->rxdataF_ext[eNB_id],
pusch_vars->drs_ch_estimates[eNB_id], pusch_vars->drs_ch_estimates[0], // pusch_vars->drs_ch_estimates[eNB_id]
l%(fp->symbols_per_tti/2), //symbol within slot l%(fp->symbols_per_tti/2), //symbol within slot
l/(fp->symbols_per_tti/2), l/(fp->symbols_per_tti/2),
ulsch_NB_IoT->counter_sf, // counter_msg ulsch_NB_IoT->counter_sf, // counter_msg
pilot_pos1, pilot_pos1,
pilot_pos2, pilot_pos2,
ul_sc_start, ul_sc_start,
...@@ -1377,47 +1344,37 @@ uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB, ...@@ -1377,47 +1344,37 @@ uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB,
l%(fp->symbols_per_tti/2), //symbol within slot l%(fp->symbols_per_tti/2), //symbol within slot
l/(fp->symbols_per_tti/2), l/(fp->symbols_per_tti/2),
ulsch_NB_IoT->counter_sf, //counter_msg, ulsch_NB_IoT->counter_sf, //counter_msg,
npusch_format, // proc->flag_msg5, ulsch_NB_IoT->npusch_format, // proc->flag_msg5,
rx_subframe, rx_subframe,
Qm, // =1 Qm, // =1
ul_sc_start, // = 0 ul_sc_start, // = 0
fp); fp);
} }
} }
/////////////////////////////////////// Equalization ///////////////////////////////////
for (l=0; l<fp->symbols_per_tti; l++)
{
ul_chequal_tmp_NB_IoT(pusch_vars->rxdataF_ext[eNB_id],
pusch_vars->rxdataF_comp[eNB_id],
pusch_vars->drs_ch_estimates[eNB_id],
l%(fp->symbols_per_tti/2), //symbol within slot
l/(fp->symbols_per_tti/2),
fp);
}
////////////////////////////////////// End Equalization /////////////////////////////////
///////////////////////////////////////// Rotation //////////////////////////////// }
for (l=0; l<fp->symbols_per_tti; l++) ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
{ void get_llr_per_sf_NB_IoT(PHY_VARS_eNB *eNB,
/// In case of 1 subcarrier: BPSK and QPSK should be rotated by pi/2 and pi/4, respectively LTE_DL_FRAME_PARMS *fp,
rotate_single_carrier_NB_IoT(eNB, uint8_t npusch_format,
fp, uint8_t counter_sf,
pusch_vars->rxdataF_comp[eNB_id], uint16_t N_SF_per_word,
UE_id, // UE ID uint8_t pilot_pos1,
l, uint8_t pilot_pos2,
ulsch_NB_IoT->counter_sf, //counter_msg, uint16_t ul_sc_start,
ul_sc_start, uint16_t Nsc_RU)
Qm, {
N_SF_per_word, LTE_eNB_PUSCH *pusch_vars = eNB->pusch_vars[0]; // UE_id
npusch_format); // or data int16_t *llrp;
} uint32_t l,ii=0;
//////////////////////////////////////////End rotation ///////////////////////////////////
if(npusch_format == 0) if(npusch_format == 0) // format 1
{ {
llrp = (int16_t*)&pusch_vars->llr[0+ (N_SF_per_word-ulsch_NB_IoT->counter_sf)*24]; /// 24= 12 symbols/SF * 2 // since Real and im llrp = (int16_t*)&pusch_vars->llr[0+ (N_SF_per_word-counter_sf)*24]; /// 24= 12 symbols/SF * 2 // since Real and im
} else {
llrp = (int16_t*)&pusch_vars->llr[0+ (2-ulsch_NB_IoT->counter_sf)*16]; // 16 = 8 symbols/SF * 2 // since real and im } else { // format 2
llrp = (int16_t*)&pusch_vars->llr[0+ (2-counter_sf)*16]; // 16 = 8 symbols/SF * 2 // since real and im
} }
for (l=0; l<fp->symbols_per_tti; l++) for (l=0; l<fp->symbols_per_tti; l++)
...@@ -1434,21 +1391,42 @@ uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB, ...@@ -1434,21 +1391,42 @@ uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB,
ulsch_qpsk_llr_NB_IoT(eNB, ulsch_qpsk_llr_NB_IoT(eNB,
fp, fp,
pusch_vars->rxdataF_comp[eNB_id], pusch_vars->rxdataF_comp[0], // pusch_vars->rxdataF_comp[eNB_id],
pusch_vars->llr, pusch_vars->llr,
l, l,
UE_id, // UE ID 0, // UE ID
ul_sc_start, ul_sc_start,
Nsc_RU, Nsc_RU,
&llrp[ii*2]); &llrp[ii*2]);
ii++; ii++;
} }
}
///////////////////////////////////////////////// NPUSH DECOD //////////////////////////////////////
if(ulsch_NB_IoT->counter_sf == 1)
{ ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
int16_t *ulsch_llr = eNB->pusch_vars[eNB_id]->llr; //UE_id=0
void decode_NPUSCH_msg_NB_IoT(PHY_VARS_eNB *eNB,
LTE_DL_FRAME_PARMS *fp,
eNB_rxtx_proc_t *proc,
uint8_t npusch_format,
uint16_t N_SF_per_word,
uint16_t Nsc_RU,
uint16_t N_UL_slots,
uint8_t Qm,
uint8_t pilots_slot,
uint32_t rnti_tmp,
uint8_t rx_subframe,
uint32_t rx_frame)
{
LTE_eNB_PUSCH *pusch_vars = eNB->pusch_vars[0]; // eNB->pusch_vars[UE_id];
NB_IoT_eNB_NULSCH_t *ulsch_NB_IoT = eNB->ulsch_NB_IoT[0];
NB_IoT_UL_eNB_HARQ_t *ulsch_harq = ulsch_NB_IoT->harq_process;
int16_t *ulsch_llr = eNB->pusch_vars[0]->llr; // eNB->pusch_vars[eNB_id]->llr; //UE_id=0
unsigned int A = (ulsch_harq->TBS)*8; unsigned int A = (ulsch_harq->TBS)*8;
uint8_t rvdx = ulsch_harq->rvidx; uint8_t rvdx = ulsch_harq->rvidx;
unsigned int j,j2; //i2, unsigned int j,j2; //i2,
...@@ -1459,7 +1437,6 @@ uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB, ...@@ -1459,7 +1437,6 @@ uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB,
uint32_t x1, x2, s=0; uint32_t x1, x2, s=0;
int16_t y[6*14*1200] __attribute__((aligned(32))); int16_t y[6*14*1200] __attribute__((aligned(32)));
uint8_t ytag[14*1200]; uint8_t ytag[14*1200];
//int16_t cseq[6*14*1200];
uint8_t reset; uint8_t reset;
uint8_t counter_ack; // ack counter for decision ack/nack uint8_t counter_ack; // ack counter for decision ack/nack
int32_t counter_ack_soft; int32_t counter_ack_soft;
...@@ -1549,7 +1526,7 @@ uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB, ...@@ -1549,7 +1526,7 @@ uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB,
} }
///////////////////////////////// desin multi-tone ///////////////////////////////// desin multi-tone
//if multi-RU //if multi-RU
/// deinterleaving /// deinterleaving
j = 0; j = 0;
j2 = 0; j2 = 0;
...@@ -1565,7 +1542,6 @@ uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB, ...@@ -1565,7 +1542,6 @@ uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB,
ep[6] = yp[6]; ep[6] = yp[6];
ep[7] = yp[7]; ep[7] = yp[7];
} }
/////
/// decoding /// decoding
r=0; r=0;
Kr=0; Kr=0;
...@@ -1720,20 +1696,16 @@ uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB, ...@@ -1720,20 +1696,16 @@ uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB,
} }
}//////////// r loop end //////////// }//////////// r loop end ////////////
// uint8_t *msg3 = &eNB->msg3_pdu[0];
// printf("pdu[0] = %d \n",ulsch_harq->b[0]);
/* int m =0; } else { //////////////////////////////////// ACK //////////////////////////////
for(m=0; m<6;m++)
{
msg3[m]=ulsch_harq->b[2+m]; int32_t llr_msg5[16];
}*/ int32_t y_msg5[16];
int16_t *llrp2;
int l=0;
} else { //////////////////////////////////// ACK ////////////////////////////// llrp2 = (int16_t*)&pusch_vars->llr[0];
llrp2 = (int16_t*)&pusch_vars->llr[0];
for (l=0;l<16;l++) /// Add real and imaginary parts of BPSK constellation for (l=0;l<16;l++) /// Add real and imaginary parts of BPSK constellation
{ {
llr_msg5[l] = llrp2[l<<1] + llrp2[(l<<1)+1]; llr_msg5[l] = llrp2[l<<1] + llrp2[(l<<1)+1];
...@@ -1799,19 +1771,132 @@ uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB, ...@@ -1799,19 +1771,132 @@ uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB,
printf("\n\n\n"); printf("\n\n\n");
} }
///// if last sf of the word ///// if last sf of the word
ulsch_NB_IoT->counter_repetitions--; ulsch_NB_IoT->counter_repetitions--;
if(ulsch_NB_IoT->Msg3_flag == 1) if(ulsch_NB_IoT->Msg3_flag == 1)
{ {
ulsch_harq->rvidx = (ulsch_NB_IoT->counter_repetitions % 2)*2; // rvidx toogle for new code word ulsch_harq->rvidx = (ulsch_NB_IoT->counter_repetitions % 2)*2; // rvidx toogle for new code word
} // else {} for other npusch cases ?? } // else {} for other npusch cases ??
if( (ulsch_NB_IoT->counter_sf == 1) && (ulsch_NB_IoT->counter_repetitions == 0) ) if( (ulsch_NB_IoT->counter_sf == 1) && (ulsch_NB_IoT->counter_repetitions == 0) )
{ {
ulsch_NB_IoT->Msg3_active = 0; ulsch_NB_IoT->Msg3_active = 0;
ulsch_NB_IoT->Msg3_flag = 0; ulsch_NB_IoT->Msg3_flag = 0;
} }
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////// generalization of RX procedures //////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
uint8_t rx_ulsch_Gen_NB_IoT(PHY_VARS_eNB *eNB,
eNB_rxtx_proc_t *proc,
uint8_t eNB_id, // this is the effective sector id
uint8_t UE_id,
uint16_t UL_RB_ID_NB_IoT, // 22 , to be included in // to be replaced by NB_IoT_start ??
uint8_t rx_subframe, // received subframe
uint32_t rx_frame) // received frame
{
LTE_eNB_PUSCH *pusch_vars = eNB->pusch_vars[UE_id];
LTE_eNB_COMMON *common_vars = &eNB->common_vars;
//NB_IoT_DL_FRAME_PARMS *frame_parms = &eNB->frame_parms;
LTE_DL_FRAME_PARMS *fp = &eNB->frame_parms;
// NB_IoT_eNB_NULSCH_t **ulsch_NB_IoT = &eNB->ulsch_NB_IoT[0];//[0][0];
NB_IoT_eNB_NULSCH_t *ulsch_NB_IoT = eNB->ulsch_NB_IoT[0];
NB_IoT_UL_eNB_HARQ_t *ulsch_harq = ulsch_NB_IoT->harq_process;
if (ulsch_NB_IoT->Msg3_active == 1)
{
uint8_t npusch_format = ulsch_NB_IoT->npusch_format; /// 0 or 1 -> format 1 or format 2
uint8_t subcarrier_spacing = ulsch_harq->subcarrier_spacing; // can be set as fix value //values are OK // 0 (3.75 KHz) or 1 (15 KHz)
uint16_t I_sc = ulsch_harq->subcarrier_indication; // Isc =0->18 , or 0->47 // format 2, 0->3 or 0->7
uint16_t I_mcs = ulsch_harq->mcs; // values 0->10
uint16_t Nsc_RU = get_UL_N_ru_NB_IoT(I_mcs,ulsch_harq->resource_assignment,ulsch_NB_IoT->Msg3_flag);
uint16_t N_UL_slots = get_UL_slots_per_RU_NB_IoT(subcarrier_spacing,I_sc,npusch_format)*Nsc_RU; // N_UL_slots per word
uint16_t N_SF_per_word = N_UL_slots/2;
if(ulsch_NB_IoT->flag_vars == 1)
{
ulsch_NB_IoT->counter_sf = N_SF_per_word;
ulsch_NB_IoT->counter_repetitions = get_UL_N_rep_NB_IoT(ulsch_harq->repetition_number);
ulsch_NB_IoT->flag_vars = 0;
}
if(ulsch_NB_IoT->counter_sf == N_SF_per_word) // initialization for scrambling
{
ulsch_NB_IoT->Msg3_subframe = rx_subframe; // first received subframe
ulsch_NB_IoT->Msg3_frame = rx_frame; // first received frame
}
uint8_t pilot_pos1, pilot_pos2, pilots_slot; // holds for npusch format 1, and 15 kHz subcarrier bandwidth
uint32_t l;
uint32_t rnti_tmp = ulsch_NB_IoT->rnti;
uint16_t ul_sc_start = get_UL_sc_index_start_NB_IoT(subcarrier_spacing,I_sc,npusch_format);
uint8_t Qm = get_Qm_UL_NB_IoT(I_mcs,Nsc_RU,I_sc,ulsch_NB_IoT->Msg3_flag);
get_pilots_position(npusch_format, subcarrier_spacing, &pilot_pos1, &pilot_pos2, &pilots_slot);
////////////////////// channel estimation per SF ////////////////////
UL_channel_estimation_NB_IoT(eNB, fp, UL_RB_ID_NB_IoT, Nsc_RU, pilot_pos1, pilot_pos2, ul_sc_start, Qm, N_SF_per_word, rx_subframe);
//////////////////////// Equalization per SF ///////////////////////
for (l=0; l<fp->symbols_per_tti; l++)
{
ul_chequal_tmp_NB_IoT(pusch_vars->rxdataF_ext[eNB_id],
pusch_vars->rxdataF_comp[eNB_id],
pusch_vars->drs_ch_estimates[eNB_id],
l%(fp->symbols_per_tti/2), //symbol within slot
l/(fp->symbols_per_tti/2),
fp);
}
///////////////////// Rotation /////////////////
for (l=0; l<fp->symbols_per_tti; l++)
{
/// In case of 1 subcarrier: BPSK and QPSK should be rotated by pi/2 and pi/4, respectively
rotate_single_carrier_NB_IoT(eNB,
fp,
pusch_vars->rxdataF_comp[eNB_id],
UE_id, // UE ID
l,
ulsch_NB_IoT->counter_sf, //counter_msg,
ul_sc_start,
Qm,
N_SF_per_word,
npusch_format); // or data
}
////////////////////// get LLR values per SF /////////////////////////
get_llr_per_sf_NB_IoT(eNB,
fp,
npusch_format,
ulsch_NB_IoT->counter_sf,
N_SF_per_word,
pilot_pos1,
pilot_pos2,
ul_sc_start,
Nsc_RU);
///////////////////////////////////////////////// NPUSH DECOD //////////////////////////////////////
if(ulsch_NB_IoT->counter_sf == 1)
{
decode_NPUSCH_msg_NB_IoT(eNB,
fp,
proc,
npusch_format,
N_SF_per_word,
Nsc_RU,
N_UL_slots,
Qm,
pilots_slot,
rnti_tmp,
rx_subframe,
rx_frame);
} // NPUSH decode end } // NPUSH decode end
......
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