#include<stdio.h> #include <string.h> #include <math.h> #include <unistd.h> #include <fcntl.h> #include <sys/ioctl.h> #include <sys/mman.h> #include "PHY/impl_defs_nr.h" #include "PHY/defs_nr_common.h" #include "PHY/defs_nr_UE.h" #include "PHY/NR_UE_TRANSPORT/pucch_nr.h" #include "PHY/NR_TRANSPORT/nr_transport_common_proto.h" #include "PHY/NR_TRANSPORT/nr_transport.h" #include "common/utils/LOG/log.h" #include "common/utils/LOG/vcd_signal_dumper.h" #include "T.h" void nr_decode_pucch0(int32_t **rxdataF, NR_DL_FRAME_PARMS *frame_parms, int slot, nfapi_nr_uci_pucch_pdu_format_0_1_t* uci_pdu, nfapi_nr_pucch_pdu_t* pucch_pdu) { int nr_sequences; const uint8_t *mcs; pucch_GroupHopping_t pucch_GroupHopping = pucch_pdu->group_hop_flag + (pucch_pdu->sequence_hop_flag<<1); if(pucch_pdu->bit_len_harq==1){ mcs=table1_mcs; nr_sequences=4>>(1-pucch_pdu->sr_flag); } else{ mcs=table2_mcs; nr_sequences=8>>(1-pucch_pdu->sr_flag); } /* * Implement TS 38.211 Subclause 6.3.2.3.1 Sequence generation * */ /* * Defining cyclic shift hopping TS 38.211 Subclause 6.3.2.2.2 */ // alpha is cyclic shift double alpha; // lnormal is the OFDM symbol number in the PUCCH transmission where l=0 corresponds to the first OFDM symbol of the PUCCH transmission //uint8_t lnormal; // lprime is the index of the OFDM symbol in the slot that corresponds to the first OFDM symbol of the PUCCH transmission in the slot given by [5, TS 38.213] //uint8_t lprime; /* * in TS 38.213 Subclause 9.2.1 it is said that: * for PUCCH format 0 or PUCCH format 1, the index of the cyclic shift * is indicated by higher layer parameter PUCCH-F0-F1-initial-cyclic-shift */ /* * Implementing TS 38.211 Subclause 6.3.2.3.1, the sequence x(n) shall be generated according to: * x(l*12+n) = r_u_v_alpha_delta(n) */ // the value of u,v (delta always 0 for PUCCH) has to be calculated according to TS 38.211 Subclause 6.3.2.2.1 uint8_t u=0,v=0;//,delta=0; // if frequency hopping is disabled by the higher-layer parameter PUCCH-frequency-hopping // n_hop = 0 // if frequency hopping is enabled by the higher-layer parameter PUCCH-frequency-hopping // n_hop = 0 for first hop // n_hop = 1 for second hop uint8_t n_hop = 0; // Frequnecy hopping not implemented FIXME!! // x_n contains the sequence r_u_v_alpha_delta(n) int16_t x_n_re[nr_sequences][24],x_n_im[nr_sequences][24]; int n,i,l; for(i=0;i<nr_sequences;i++){ // we proceed to calculate alpha according to TS 38.211 Subclause 6.3.2.2.2 for (l=0; l<pucch_pdu->nr_of_symbols; l++){ nr_group_sequence_hopping(pucch_GroupHopping,pucch_pdu->hopping_id,n_hop,slot,&u,&v); // calculating u and v value alpha = nr_cyclic_shift_hopping(pucch_pdu->hopping_id,pucch_pdu->initial_cyclic_shift,mcs[i],l,pucch_pdu->start_symbol_index,slot); #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch0] sequence generation \tu=%d \tv=%d \talpha=%lf \t(for symbol l=%d)\n",u,v,alpha,l); #endif for (n=0; n<12; n++){ x_n_re[i][(12*l)+n] = (int16_t)((int16_t)(((((int32_t)(round(32767*cos(alpha*n))) * table_5_2_2_2_2_Re[u][n])>>15) - (((int32_t)(round(32767*sin(alpha*n))) * table_5_2_2_2_2_Im[u][n])>>15)))>>15); // Re part of base sequence shifted by alpha x_n_im[i][(12*l)+n] =(int16_t)((int16_t)(((((int32_t)(round(32767*cos(alpha*n))) * table_5_2_2_2_2_Im[u][n])>>15) + (((int32_t)(round(32767*sin(alpha*n))) * table_5_2_2_2_2_Re[u][n])>>15)))>>15); // Im part of base sequence shifted by alpha #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch0] sequence generation \tu=%d \tv=%d \talpha=%lf \tx_n(l=%d,n=%d)=(%d,%d)\n", u,v,alpha,l,n,x_n_re[(12*l)+n],x_n_im[(12*l)+n]); #endif } } } int16_t r_re[24],r_im[24]; /* * Implementing TS 38.211 Subclause 6.3.2.3.2 Mapping to physical resources */ uint32_t re_offset=0; uint8_t l2; for (l=0; l<pucch_pdu->nr_of_symbols; l++) { l2 = l+pucch_pdu->start_symbol_index; re_offset = (12*pucch_pdu->prb_start) + frame_parms->first_carrier_offset; if (re_offset>= frame_parms->ofdm_symbol_size) re_offset-=frame_parms->ofdm_symbol_size; for (n=0; n<12; n++){ r_re[(12*l)+n]=((int16_t *)&rxdataF[0][(l2*frame_parms->ofdm_symbol_size)+re_offset])[0]; r_im[(12*l)+n]=((int16_t *)&rxdataF[0][(l2*frame_parms->ofdm_symbol_size)+re_offset])[1]; #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch0] mapping to RE \tofdm_symbol_size=%d \tN_RB_DL=%d \tfirst_carrier_offset=%d \ttxptr(%d)=(x_n(l=%d,n=%d)=(%d,%d))\n", frame_parms->ofdm_symbol_size,frame_parms->N_RB_DL,frame_parms->first_carrier_offset,(l2*frame_parms->ofdm_symbol_size)+re_offset, l,n,((int16_t *)&rxdataF[0][(l2*frame_parms->ofdm_symbol_size)+re_offset])[0], ((int16_t *)&rxdataF[0][(l2*frame_parms->ofdm_symbol_size)+re_offset])[1]); #endif re_offset++; if (re_offset>= frame_parms->ofdm_symbol_size) re_offset-=frame_parms->ofdm_symbol_size; } } double corr[nr_sequences],corr_re[nr_sequences],corr_im[nr_sequences]; memset(corr,0,nr_sequences*sizeof(double)); memset(corr_re,0,nr_sequences*sizeof(double)); memset(corr_im,0,nr_sequences*sizeof(double)); for(i=0;i<nr_sequences;i++){ for(l=0;l<pucch_pdu->nr_of_symbols;l++){ for(n=0;n<12;n++){ corr_re[i]+= (double)(r_re[12*l+n])/32767*(double)(x_n_re[i][12*l+n])/32767+(double)(r_im[12*l+n])/32767*(double)(x_n_im[i][12*l+n])/32767; corr_im[i]+= (double)(r_re[12*l+n])/32767*(double)(x_n_im[i][12*l+n])/32767-(double)(r_im[12*l+n])/32767*(double)(x_n_re[i][12*l+n])/32767; } } corr[i]=corr_re[i]*corr_re[i]+corr_im[i]*corr_im[i]; } float max_corr=corr[0]; uint8_t index=0; for(i=1;i<nr_sequences;i++){ if(corr[i]>max_corr){ index= i; max_corr=corr[i]; } } // first bit of bitmap for sr presence and second bit for acknack presence uci_pdu->pdu_bit_map = pucch_pdu->sr_flag | ((pucch_pdu->bit_len_harq>0)<<1); uci_pdu->pucch_format = 0; // format 0 uci_pdu->ul_cqi = 0xff; // currently not valid uci_pdu->timing_advance = 0xffff; // currently not valid uci_pdu->rssi = 0xffff; // currently not valid if (pucch_pdu->sr_flag) { //currently not supported } else uci_pdu->sr = NULL; if (pucch_pdu->bit_len_harq>0) { uci_pdu->harq = calloc(1,sizeof(*uci_pdu->harq)); uci_pdu->harq->num_harq = pucch_pdu->bit_len_harq; uci_pdu->harq->harq_confidence_level = 0xff; // currently not valid uci_pdu->harq->harq_list = (nfapi_nr_harq_t*)malloc(uci_pdu->harq->num_harq); for (i=0; i<uci_pdu->harq->num_harq; i++) // FIXME for non present uci_pdu->harq->harq_list[i].harq_value = (index>>i)&0x01; } else uci_pdu->harq = NULL; } void nr_decode_pucch1( int32_t **rxdataF, pucch_GroupHopping_t pucch_GroupHopping, uint32_t n_id, // hoppingID higher layer parameter uint64_t *payload, NR_DL_FRAME_PARMS *frame_parms, int16_t amp, int nr_tti_tx, uint8_t m0, uint8_t nrofSymbols, uint8_t startingSymbolIndex, uint16_t startingPRB, uint16_t startingPRB_intraSlotHopping, uint8_t timeDomainOCC, uint8_t nr_bit) { #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch1] start function at slot(nr_tti_tx)=%d payload=%d m0=%d nrofSymbols=%d startingSymbolIndex=%d startingPRB=%d startingPRB_intraSlotHopping=%d timeDomainOCC=%d nr_bit=%d\n", nr_tti_tx,payload,m0,nrofSymbols,startingSymbolIndex,startingPRB,startingPRB_intraSlotHopping,timeDomainOCC,nr_bit); #endif /* * Implement TS 38.211 Subclause 6.3.2.4.1 Sequence modulation * */ // complex-valued symbol d_re, d_im containing complex-valued symbol d(0): int16_t d_re=0, d_im=0,d1_re=0,d1_im=0; #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch1] sequence modulation: payload=%x \tde_re=%d \tde_im=%d\n",payload,d_re,d_im); #endif /* * Defining cyclic shift hopping TS 38.211 Subclause 6.3.2.2.2 */ // alpha is cyclic shift double alpha; // lnormal is the OFDM symbol number in the PUCCH transmission where l=0 corresponds to the first OFDM symbol of the PUCCH transmission //uint8_t lnormal = 0 ; // lprime is the index of the OFDM symbol in the slot that corresponds to the first OFDM symbol of the PUCCH transmission in the slot given by [5, TS 38.213] uint8_t lprime = startingSymbolIndex; // mcs = 0 except for PUCCH format 0 uint8_t mcs=0; // r_u_v_alpha_delta_re and r_u_v_alpha_delta_im tables containing the sequence y(n) for the PUCCH, when they are multiplied by d(0) // r_u_v_alpha_delta_dmrs_re and r_u_v_alpha_delta_dmrs_im tables containing the sequence for the DM-RS. int16_t r_u_v_alpha_delta_re[12],r_u_v_alpha_delta_im[12],r_u_v_alpha_delta_dmrs_re[12],r_u_v_alpha_delta_dmrs_im[12]; /* * in TS 38.213 Subclause 9.2.1 it is said that: * for PUCCH format 0 or PUCCH format 1, the index of the cyclic shift * is indicated by higher layer parameter PUCCH-F0-F1-initial-cyclic-shift */ /* * the complex-valued symbol d_0 shall be multiplied with a sequence r_u_v_alpha_delta(n): y(n) = d_0 * r_u_v_alpha_delta(n) */ // the value of u,v (delta always 0 for PUCCH) has to be calculated according to TS 38.211 Subclause 6.3.2.2.1 uint8_t u=0,v=0;//,delta=0; // if frequency hopping is disabled, intraSlotFrequencyHopping is not provided // n_hop = 0 // if frequency hopping is enabled, intraSlotFrequencyHopping is provided // n_hop = 0 for first hop // n_hop = 1 for second hop uint8_t n_hop = 0; // Intra-slot frequency hopping shall be assumed when the higher-layer parameter intraSlotFrequencyHopping is provided, // regardless of whether the frequency-hop distance is zero or not, // otherwise no intra-slot frequency hopping shall be assumed //uint8_t PUCCH_Frequency_Hopping = 0 ; // from higher layers uint8_t intraSlotFrequencyHopping = 0; if (startingPRB != startingPRB_intraSlotHopping) { intraSlotFrequencyHopping=1; } #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch1] intraSlotFrequencyHopping = %d \n",intraSlotFrequencyHopping); #endif /* * Implementing TS 38.211 Subclause 6.3.2.4.2 Mapping to physical resources */ //int32_t *txptr; uint32_t re_offset=0; int i=0; #define MAX_SIZE_Z 168 // this value has to be calculated from mprime*12*table_6_3_2_4_1_1_N_SF_mprime_PUCCH_1_noHop[pucch_symbol_length]+m*12+n int16_t z_re_rx[MAX_SIZE_Z],z_im_rx[MAX_SIZE_Z],z_re_temp,z_im_temp; int16_t z_dmrs_re_rx[MAX_SIZE_Z],z_dmrs_im_rx[MAX_SIZE_Z],z_dmrs_re_temp,z_dmrs_im_temp; memset(z_re_rx,0,MAX_SIZE_Z*sizeof(int16_t)); memset(z_im_rx,0,MAX_SIZE_Z*sizeof(int16_t)); memset(z_dmrs_re_rx,0,MAX_SIZE_Z*sizeof(int16_t)); memset(z_dmrs_im_rx,0,MAX_SIZE_Z*sizeof(int16_t)); int l=0; for(l=0;l<nrofSymbols;l++){ //extracting data and dmrs from rxdataF if ((intraSlotFrequencyHopping == 1) && (l<floor(nrofSymbols/2))) { // intra-slot hopping enabled, we need to calculate new offset PRB startingPRB = startingPRB + startingPRB_intraSlotHopping; } if ((startingPRB < (frame_parms->N_RB_DL>>1)) && ((frame_parms->N_RB_DL & 1) == 0)) { // if number RBs in bandwidth is even and current PRB is lower band re_offset = ((l+startingSymbolIndex)*frame_parms->ofdm_symbol_size) + (12*startingPRB) + frame_parms->first_carrier_offset; } if ((startingPRB >= (frame_parms->N_RB_DL>>1)) && ((frame_parms->N_RB_DL & 1) == 0)) { // if number RBs in bandwidth is even and current PRB is upper band re_offset = ((l+startingSymbolIndex)*frame_parms->ofdm_symbol_size) + (12*(startingPRB-(frame_parms->N_RB_DL>>1))); } if ((startingPRB < (frame_parms->N_RB_DL>>1)) && ((frame_parms->N_RB_DL & 1) == 1)) { // if number RBs in bandwidth is odd and current PRB is lower band re_offset = ((l+startingSymbolIndex)*frame_parms->ofdm_symbol_size) + (12*startingPRB) + frame_parms->first_carrier_offset; } if ((startingPRB > (frame_parms->N_RB_DL>>1)) && ((frame_parms->N_RB_DL & 1) == 1)) { // if number RBs in bandwidth is odd and current PRB is upper band re_offset = ((l+startingSymbolIndex)*frame_parms->ofdm_symbol_size) + (12*(startingPRB-(frame_parms->N_RB_DL>>1))) + 6; } if ((startingPRB == (frame_parms->N_RB_DL>>1)) && ((frame_parms->N_RB_DL & 1) == 1)) { // if number RBs in bandwidth is odd and current PRB contains DC re_offset = ((l+startingSymbolIndex)*frame_parms->ofdm_symbol_size) + (12*startingPRB) + frame_parms->first_carrier_offset; } //txptr = &txdataF[0][re_offset]; for (int n=0; n<12; n++) { if ((n==6) && (startingPRB == (frame_parms->N_RB_DL>>1)) && ((frame_parms->N_RB_DL & 1) == 1)) { // if number RBs in bandwidth is odd and current PRB contains DC, we need to recalculate the offset when n=6 (for second half PRB) re_offset = ((l+startingSymbolIndex)*frame_parms->ofdm_symbol_size); } if (l%2 == 1) { // mapping PUCCH according to TS38.211 subclause 6.4.1.3.1 z_re_rx[i+n] = ((int16_t *)&rxdataF[0][re_offset])[0]; z_im_rx[i+n] = ((int16_t *)&rxdataF[0][re_offset])[1]; #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch1] mapping PUCCH to RE \t amp=%d \tofdm_symbol_size=%d \tN_RB_DL=%d \tfirst_carrier_offset=%d \tz_pucch[%d]=txptr(%d)=(x_n(l=%d,n=%d)=(%d,%d))\n", amp,frame_parms->ofdm_symbol_size,frame_parms->N_RB_DL,frame_parms->first_carrier_offset,i+n,re_offset, l,n,((int16_t *)&txdataF[0][re_offset])[0],((int16_t *)&txdataF[0][re_offset])[1]); #endif } if (l%2 == 0) { // mapping DM-RS signal according to TS38.211 subclause 6.4.1.3.1 z_dmrs_re_rx[i+n] = ((int16_t *)&rxdataF[0][re_offset])[0]; z_dmrs_im_rx[i+n] = ((int16_t *)&rxdataF[0][re_offset])[1]; // printf("%d\t%d\t%d\n",l,z_dmrs_re_rx[i+n],z_dmrs_im_rx[i+n]); #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch1] mapping DM-RS to RE \t amp=%d \tofdm_symbol_size=%d \tN_RB_DL=%d \tfirst_carrier_offset=%d \tz_dm-rs[%d]=txptr(%d)=(x_n(l=%d,n=%d)=(%d,%d))\n", amp,frame_parms->ofdm_symbol_size,frame_parms->N_RB_DL,frame_parms->first_carrier_offset,i+n,re_offset, l,n,((int16_t *)&txdataF[0][re_offset])[0],((int16_t *)&txdataF[0][re_offset])[1]); #endif // printf("l=%d\ti=%d\tre_offset=%d\treceived dmrs re=%d\tim=%d\n",l,i,re_offset,z_dmrs_re_rx[i+n],z_dmrs_im_rx[i+n]); } re_offset++; } if (l%2 == 1) i+=12; } int16_t y_n_re[12],y_n_im[12],y1_n_re[12],y1_n_im[12]; memset(y_n_re,0,12*sizeof(int16_t)); memset(y_n_im,0,12*sizeof(int16_t)); memset(y1_n_re,0,12*sizeof(int16_t)); memset(y1_n_im,0,12*sizeof(int16_t)); //generating transmitted sequence and dmrs for (l=0; l<nrofSymbols; l++) { #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch1] for symbol l=%d, lprime=%d\n", l,lprime); #endif // y_n contains the complex value d multiplied by the sequence r_u_v if ((intraSlotFrequencyHopping == 1) && (l >= (int)floor(nrofSymbols/2))) n_hop = 1; // n_hop = 1 for second hop #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch1] entering function nr_group_sequence_hopping with n_hop=%d, nr_tti_tx=%d\n", n_hop,nr_tti_tx); #endif nr_group_sequence_hopping(pucch_GroupHopping,n_id,n_hop,nr_tti_tx,&u,&v); // calculating u and v value alpha = nr_cyclic_shift_hopping(n_id,m0,mcs,l,lprime,nr_tti_tx); for (int n=0; n<12; n++) { // generating low papr sequences if(l%2==1){ r_u_v_alpha_delta_re[n] = (int16_t)(((((int32_t)(round(32767*cos(alpha*n))) * table_5_2_2_2_2_Re[u][n])>>15) - (((int32_t)(round(32767*sin(alpha*n))) * table_5_2_2_2_2_Im[u][n])>>15))); // Re part of base sequence shifted by alpha r_u_v_alpha_delta_im[n] = (int16_t)(((((int32_t)(round(32767*cos(alpha*n))) * table_5_2_2_2_2_Im[u][n])>>15) + (((int32_t)(round(32767*sin(alpha*n))) * table_5_2_2_2_2_Re[u][n])>>15))); // Im part of base sequence shifted by alpha } else{ r_u_v_alpha_delta_dmrs_re[n] = (int16_t)(((((int32_t)(round(32767*cos(alpha*n))) * table_5_2_2_2_2_Re[u][n])>>15) - (((int32_t)(round(32767*sin(alpha*n))) * table_5_2_2_2_2_Im[u][n])>>15))); // Re part of DMRS base sequence shifted by alpha r_u_v_alpha_delta_dmrs_im[n] = (int16_t)(((((int32_t)(round(32767*cos(alpha*n))) * table_5_2_2_2_2_Im[u][n])>>15) + (((int32_t)(round(32767*sin(alpha*n))) * table_5_2_2_2_2_Re[u][n])>>15))); // Im part of DMRS base sequence shifted by alpha r_u_v_alpha_delta_dmrs_re[n] = (int16_t)(((int32_t)(amp*r_u_v_alpha_delta_dmrs_re[n]))>>15); r_u_v_alpha_delta_dmrs_im[n] = (int16_t)(((int32_t)(amp*r_u_v_alpha_delta_dmrs_im[n]))>>15); } // printf("symbol=%d\tr_u_rx_re=%d\tr_u_rx_im=%d\n",l,r_u_v_alpha_delta_dmrs_re[n], r_u_v_alpha_delta_dmrs_im[n]); // PUCCH sequence = DM-RS sequence multiplied by d(0) /* y_n_re[n] = (int16_t)(((((int32_t)(r_u_v_alpha_delta_re[n])*d_re)>>15) - (((int32_t)(r_u_v_alpha_delta_im[n])*d_im)>>15))); // Re part of y(n) y_n_im[n] = (int16_t)(((((int32_t)(r_u_v_alpha_delta_re[n])*d_im)>>15) + (((int32_t)(r_u_v_alpha_delta_im[n])*d_re)>>15))); // Im part of y(n) */ #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch1] sequence generation \tu=%d \tv=%d \talpha=%lf \tr_u_v_alpha_delta[n=%d]=(%d,%d) \ty_n[n=%d]=(%d,%d)\n", u,v,alpha,n,r_u_v_alpha_delta_re[n],r_u_v_alpha_delta_im[n],n,y_n_re[n],y_n_im[n]); #endif } /* * The block of complex-valued symbols y(n) shall be block-wise spread with the orthogonal sequence wi(m) * (defined in table_6_3_2_4_1_2_Wi_Re and table_6_3_2_4_1_2_Wi_Im) * z(mprime*12*table_6_3_2_4_1_1_N_SF_mprime_PUCCH_1_noHop[pucch_symbol_length]+m*12+n)=wi(m)*y(n) * * The block of complex-valued symbols r_u_v_alpha_dmrs_delta(n) for DM-RS shall be block-wise spread with the orthogonal sequence wi(m) * (defined in table_6_3_2_4_1_2_Wi_Re and table_6_3_2_4_1_2_Wi_Im) * z(mprime*12*table_6_4_1_3_1_1_1_N_SF_mprime_PUCCH_1_noHop[pucch_symbol_length]+m*12+n)=wi(m)*y(n) * */ // the orthogonal sequence index for wi(m) defined in TS 38.213 Subclause 9.2.1 // the index of the orthogonal cover code is from a set determined as described in [4, TS 38.211] // and is indicated by higher layer parameter PUCCH-F1-time-domain-OCC // In the PUCCH_Config IE, the PUCCH-format1, timeDomainOCC field uint8_t w_index = timeDomainOCC; // N_SF_mprime_PUCCH_1 contains N_SF_mprime from table 6.3.2.4.1-1 (depending on number of PUCCH symbols nrofSymbols, mprime and intra-slot hopping enabled/disabled) uint8_t N_SF_mprime_PUCCH_1; // N_SF_mprime_PUCCH_1 contains N_SF_mprime from table 6.4.1.3.1.1-1 (depending on number of PUCCH symbols nrofSymbols, mprime and intra-slot hopping enabled/disabled) uint8_t N_SF_mprime_PUCCH_DMRS_1; // N_SF_mprime_PUCCH_1 contains N_SF_mprime from table 6.3.2.4.1-1 (depending on number of PUCCH symbols nrofSymbols, mprime=0 and intra-slot hopping enabled/disabled) uint8_t N_SF_mprime0_PUCCH_1; // N_SF_mprime_PUCCH_1 contains N_SF_mprime from table 6.4.1.3.1.1-1 (depending on number of PUCCH symbols nrofSymbols, mprime=0 and intra-slot hopping enabled/disabled) uint8_t N_SF_mprime0_PUCCH_DMRS_1; // mprime is 0 if no intra-slot hopping / mprime is {0,1} if intra-slot hopping uint8_t mprime = 0; if (intraSlotFrequencyHopping == 0) { // intra-slot hopping disabled #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch1] block-wise spread with the orthogonal sequence wi(m) if intraSlotFrequencyHopping = %d, intra-slot hopping disabled\n", intraSlotFrequencyHopping); #endif N_SF_mprime_PUCCH_1 = table_6_3_2_4_1_1_N_SF_mprime_PUCCH_1_noHop[nrofSymbols-1]; // only if intra-slot hopping not enabled (PUCCH) N_SF_mprime_PUCCH_DMRS_1 = table_6_4_1_3_1_1_1_N_SF_mprime_PUCCH_1_noHop[nrofSymbols-1]; // only if intra-slot hopping not enabled (DM-RS) N_SF_mprime0_PUCCH_1 = table_6_3_2_4_1_1_N_SF_mprime_PUCCH_1_noHop[nrofSymbols-1]; // only if intra-slot hopping not enabled mprime = 0 (PUCCH) N_SF_mprime0_PUCCH_DMRS_1 = table_6_4_1_3_1_1_1_N_SF_mprime_PUCCH_1_noHop[nrofSymbols-1]; // only if intra-slot hopping not enabled mprime = 0 (DM-RS) #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch1] w_index = %d, N_SF_mprime_PUCCH_1 = %d, N_SF_mprime_PUCCH_DMRS_1 = %d, N_SF_mprime0_PUCCH_1 = %d, N_SF_mprime0_PUCCH_DMRS_1 = %d\n", w_index, N_SF_mprime_PUCCH_1,N_SF_mprime_PUCCH_DMRS_1,N_SF_mprime0_PUCCH_1,N_SF_mprime0_PUCCH_DMRS_1); #endif if(l%2==1){ for (int m=0; m < N_SF_mprime_PUCCH_1; m++) { if(floor(l/2)*12==(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)){ for (int n=0; n<12 ; n++) { z_re_temp = (int16_t)(((((int32_t)(table_6_3_2_4_1_2_Wi_Re[N_SF_mprime_PUCCH_1][w_index][m])*z_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15) + (((int32_t)(table_6_3_2_4_1_2_Wi_Im[N_SF_mprime_PUCCH_1][w_index][m])*z_im_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15))>>1); z_im_temp = (int16_t)(((((int32_t)(table_6_3_2_4_1_2_Wi_Re[N_SF_mprime_PUCCH_1][w_index][m])*z_im_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15) - (((int32_t)(table_6_3_2_4_1_2_Wi_Im[N_SF_mprime_PUCCH_1][w_index][m])*z_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15))>>1); z_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n]=z_re_temp; z_im_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n]=z_im_temp; // printf("symbol=%d\tz_re_rx=%d\tz_im_rx=%d\t",l,(int)z_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n],(int)z_im_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n]); #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch1] block-wise spread with wi(m) (mprime=%d, m=%d, n=%d) z[%d] = ((%d * %d - %d * %d), (%d * %d + %d * %d)) = (%d,%d)\n", mprime, m, n, (mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n, table_6_3_2_4_1_2_Wi_Re[N_SF_mprime_PUCCH_1][w_index][m],y_n_re[n],table_6_3_2_4_1_2_Wi_Im[N_SF_mprime_PUCCH_1][w_index][m],y_n_im[n], table_6_3_2_4_1_2_Wi_Re[N_SF_mprime_PUCCH_1][w_index][m],y_n_im[n],table_6_3_2_4_1_2_Wi_Im[N_SF_mprime_PUCCH_1][w_index][m],y_n_re[n], z_re[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n],z_im[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n]); #endif // multiplying with conjugate of low papr sequence z_re_temp = (int16_t)(((((int32_t)(r_u_v_alpha_delta_re[n])*z_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15) + (((int32_t)(r_u_v_alpha_delta_im[n])*z_im_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15))>>1); z_im_temp = (int16_t)(((((int32_t)(r_u_v_alpha_delta_re[n])*z_im_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15) - (((int32_t)(r_u_v_alpha_delta_im[n])*z_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15))>>1); z_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n] = z_re_temp; z_im_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n] = z_im_temp; /* if(z_re_temp<0){ printf("\nBug detection %d\t%d\t%d\t%d\n",r_u_v_alpha_delta_re[n],z_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n],(((int32_t)(r_u_v_alpha_delta_re[n])*z_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15),(((int32_t)(r_u_v_alpha_delta_im[n])*z_im_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15)); } printf("z1_re_rx=%d\tz1_im_rx=%d\n",(int)z_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n],(int)z_im_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n]); */ } } } } else{ for (int m=0; m < N_SF_mprime_PUCCH_DMRS_1; m++) { if(floor(l/2)*12==(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)){ for (int n=0; n<12 ; n++) { z_dmrs_re_temp = (int16_t)(((((int32_t)(table_6_3_2_4_1_2_Wi_Re[N_SF_mprime_PUCCH_DMRS_1][w_index][m])*z_dmrs_re_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n])>>15) + (((int32_t)(table_6_3_2_4_1_2_Wi_Im[N_SF_mprime_PUCCH_DMRS_1][w_index][m])*z_dmrs_im_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n])>>15))>>1); z_dmrs_im_temp = (int16_t)(((((int32_t)(table_6_3_2_4_1_2_Wi_Re[N_SF_mprime_PUCCH_DMRS_1][w_index][m])*z_dmrs_im_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n])>>15) - (((int32_t)(table_6_3_2_4_1_2_Wi_Im[N_SF_mprime_PUCCH_DMRS_1][w_index][m])*z_dmrs_re_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n])>>15))>>1); z_dmrs_re_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n] = z_dmrs_re_temp; z_dmrs_im_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n] = z_dmrs_im_temp; // printf("symbol=%d\tz_dmrs_re_rx=%d\tz_dmrs_im_rx=%d\t",l,(int)z_dmrs_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n],(int)z_dmrs_im_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n]); #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch1] block-wise spread with wi(m) (mprime=%d, m=%d, n=%d) z[%d] = ((%d * %d - %d * %d), (%d * %d + %d * %d)) = (%d,%d)\n", mprime, m, n, (mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n, table_6_3_2_4_1_2_Wi_Re[N_SF_mprime_PUCCH_1][w_index][m],r_u_v_alpha_delta_dmrs_re[n],table_6_3_2_4_1_2_Wi_Im[N_SF_mprime_PUCCH_1][w_index][m],r_u_v_alpha_delta_dmrs_im[n], table_6_3_2_4_1_2_Wi_Re[N_SF_mprime_PUCCH_1][w_index][m],r_u_v_alpha_delta_dmrs_im[n],table_6_3_2_4_1_2_Wi_Im[N_SF_mprime_PUCCH_1][w_index][m],r_u_v_alpha_delta_dmrs_re[n], z_dmrs_re[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n],z_dmrs_im[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n]); #endif //finding channel coeffcients by dividing received dmrs with actual dmrs and storing them in z_dmrs_re_rx and z_dmrs_im_rx arrays z_dmrs_re_temp = (int16_t)(((((int32_t)(r_u_v_alpha_delta_dmrs_re[n])*z_dmrs_re_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n])>>15) + (((int32_t)(r_u_v_alpha_delta_dmrs_im[n])*z_dmrs_im_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n])>>15))>>1); z_dmrs_im_temp = (int16_t)(((((int32_t)(r_u_v_alpha_delta_dmrs_re[n])*z_dmrs_im_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n])>>15) - (((int32_t)(r_u_v_alpha_delta_dmrs_im[n])*z_dmrs_re_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n])>>15))>>1); /* if(z_dmrs_re_temp<0){ printf("\nBug detection %d\t%d\t%d\t%d\n",r_u_v_alpha_delta_dmrs_re[n],z_dmrs_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n],(((int32_t)(r_u_v_alpha_delta_dmrs_re[n])*z_dmrs_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15),(((int32_t)(r_u_v_alpha_delta_dmrs_im[n])*z_dmrs_im_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15)); }*/ z_dmrs_re_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n] = z_dmrs_re_temp; z_dmrs_im_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n] = z_dmrs_im_temp; // printf("z1_dmrs_re_rx=%d\tz1_dmrs_im_rx=%d\n",(int)z_dmrs_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n],(int)z_dmrs_im_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n]); /* z_dmrs_re_rx[(int)(l/2)*12+n]=z_dmrs_re_rx[(int)(l/2)*12+n]/r_u_v_alpha_delta_dmrs_re[n]; z_dmrs_im_rx[(int)(l/2)*12+n]=z_dmrs_im_rx[(int)(l/2)*12+n]/r_u_v_alpha_delta_dmrs_im[n]; */ } } } } } if (intraSlotFrequencyHopping == 1) { // intra-slot hopping enabled #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch1] block-wise spread with the orthogonal sequence wi(m) if intraSlotFrequencyHopping = %d, intra-slot hopping enabled\n", intraSlotFrequencyHopping); #endif N_SF_mprime_PUCCH_1 = table_6_3_2_4_1_1_N_SF_mprime_PUCCH_1_m0Hop[nrofSymbols-1]; // only if intra-slot hopping enabled mprime = 0 (PUCCH) N_SF_mprime_PUCCH_DMRS_1 = table_6_4_1_3_1_1_1_N_SF_mprime_PUCCH_1_m0Hop[nrofSymbols-1]; // only if intra-slot hopping enabled mprime = 0 (DM-RS) N_SF_mprime0_PUCCH_1 = table_6_3_2_4_1_1_N_SF_mprime_PUCCH_1_m0Hop[nrofSymbols-1]; // only if intra-slot hopping enabled mprime = 0 (PUCCH) N_SF_mprime0_PUCCH_DMRS_1 = table_6_4_1_3_1_1_1_N_SF_mprime_PUCCH_1_m0Hop[nrofSymbols-1]; // only if intra-slot hopping enabled mprime = 0 (DM-RS) #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch1] w_index = %d, N_SF_mprime_PUCCH_1 = %d, N_SF_mprime_PUCCH_DMRS_1 = %d, N_SF_mprime0_PUCCH_1 = %d, N_SF_mprime0_PUCCH_DMRS_1 = %d\n", w_index, N_SF_mprime_PUCCH_1,N_SF_mprime_PUCCH_DMRS_1,N_SF_mprime0_PUCCH_1,N_SF_mprime0_PUCCH_DMRS_1); #endif for (mprime = 0; mprime<2; mprime++) { // mprime can get values {0,1} if(l%2==1){ for (int m=0; m < N_SF_mprime_PUCCH_1; m++) { if(floor(l/2)*12==(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)){ for (int n=0; n<12 ; n++) { z_re_temp = (int16_t)(((((int32_t)(table_6_3_2_4_1_2_Wi_Re[N_SF_mprime_PUCCH_1][w_index][m])*z_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15) + (((int32_t)(table_6_3_2_4_1_2_Wi_Im[N_SF_mprime_PUCCH_1][w_index][m])*z_im_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15))>>1); z_im_temp = (int16_t)(((((int32_t)(table_6_3_2_4_1_2_Wi_Re[N_SF_mprime_PUCCH_1][w_index][m])*z_im_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15) - (((int32_t)(table_6_3_2_4_1_2_Wi_Im[N_SF_mprime_PUCCH_1][w_index][m])*z_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15))>>1); z_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n] = z_re_temp; z_im_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n] = z_im_temp; #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch1] block-wise spread with wi(m) (mprime=%d, m=%d, n=%d) z[%d] = ((%d * %d - %d * %d), (%d * %d + %d * %d)) = (%d,%d)\n", mprime, m, n, (mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n, table_6_3_2_4_1_2_Wi_Re[N_SF_mprime_PUCCH_1][w_index][m],y_n_re[n],table_6_3_2_4_1_2_Wi_Im[N_SF_mprime_PUCCH_1][w_index][m],y_n_im[n], table_6_3_2_4_1_2_Wi_Re[N_SF_mprime_PUCCH_1][w_index][m],y_n_im[n],table_6_3_2_4_1_2_Wi_Im[N_SF_mprime_PUCCH_1][w_index][m],y_n_re[n], z_re[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n],z_im[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n]); #endif z_re_temp = (int16_t)(((((int32_t)(r_u_v_alpha_delta_re[n])*z_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15) + (((int32_t)(r_u_v_alpha_delta_im[n])*z_im_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15))>>1); z_im_temp = (int16_t)(((((int32_t)(r_u_v_alpha_delta_re[n])*z_im_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15) - (((int32_t)(r_u_v_alpha_delta_im[n])*z_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n])>>15))>>1); z_re_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n] = z_re_temp; z_im_rx[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n] = z_im_temp; } } } } else{ for (int m=0; m < N_SF_mprime_PUCCH_DMRS_1; m++) { if(floor(l/2)*12==(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)){ for (int n=0; n<12 ; n++) { z_dmrs_re_temp = (int16_t)(((((int32_t)(table_6_3_2_4_1_2_Wi_Re[N_SF_mprime_PUCCH_DMRS_1][w_index][m])*z_dmrs_re_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n])>>15) + (((int32_t)(table_6_3_2_4_1_2_Wi_Im[N_SF_mprime_PUCCH_DMRS_1][w_index][m])*z_dmrs_im_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n])>>15))>>1); z_dmrs_im_temp = (int16_t)(((((int32_t)(table_6_3_2_4_1_2_Wi_Re[N_SF_mprime_PUCCH_DMRS_1][w_index][m])*z_dmrs_im_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n])>>15) - (((int32_t)(table_6_3_2_4_1_2_Wi_Im[N_SF_mprime_PUCCH_DMRS_1][w_index][m])*z_dmrs_re_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n])>>15))>>1); z_dmrs_re_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n] = z_dmrs_re_temp; z_dmrs_im_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n] = z_dmrs_im_temp; #ifdef DEBUG_NR_PUCCH_RX printf("\t [nr_generate_pucch1] block-wise spread with wi(m) (mprime=%d, m=%d, n=%d) z[%d] = ((%d * %d - %d * %d), (%d * %d + %d * %d)) = (%d,%d)\n", mprime, m, n, (mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n, table_6_3_2_4_1_2_Wi_Re[N_SF_mprime_PUCCH_1][w_index][m],r_u_v_alpha_delta_dmrs_re[n],table_6_3_2_4_1_2_Wi_Im[N_SF_mprime_PUCCH_1][w_index][m],r_u_v_alpha_delta_dmrs_im[n], table_6_3_2_4_1_2_Wi_Re[N_SF_mprime_PUCCH_1][w_index][m],r_u_v_alpha_delta_dmrs_im[n],table_6_3_2_4_1_2_Wi_Im[N_SF_mprime_PUCCH_1][w_index][m],r_u_v_alpha_delta_dmrs_re[n], z_dmrs_re[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n],z_dmrs_im[(mprime*12*N_SF_mprime0_PUCCH_1)+(m*12)+n]); #endif //finding channel coeffcients by dividing received dmrs with actual dmrs and storing them in z_dmrs_re_rx and z_dmrs_im_rx arrays z_dmrs_re_temp = (int16_t)(((((int32_t)(r_u_v_alpha_delta_dmrs_re[n])*z_dmrs_re_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n])>>15) + (((int32_t)(r_u_v_alpha_delta_dmrs_im[n])*z_dmrs_im_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n])>>15))>>1); z_dmrs_im_temp = (int16_t)(((((int32_t)(r_u_v_alpha_delta_dmrs_re[n])*z_dmrs_im_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n])>>15) - (((int32_t)(r_u_v_alpha_delta_dmrs_im[n])*z_dmrs_re_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n])>>15))>>1); z_dmrs_re_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n] = z_dmrs_re_temp; z_dmrs_im_rx[(mprime*12*N_SF_mprime0_PUCCH_DMRS_1)+(m*12)+n] = z_dmrs_im_temp; /* z_dmrs_re_rx[(int)(l/2)*12+n]=z_dmrs_re_rx[(int)(l/2)*12+n]/r_u_v_alpha_delta_dmrs_re[n]; z_dmrs_im_rx[(int)(l/2)*12+n]=z_dmrs_im_rx[(int)(l/2)*12+n]/r_u_v_alpha_delta_dmrs_im[n]; */ } } } } N_SF_mprime_PUCCH_1 = table_6_3_2_4_1_1_N_SF_mprime_PUCCH_1_m1Hop[nrofSymbols-1]; // only if intra-slot hopping enabled mprime = 1 (PUCCH) N_SF_mprime_PUCCH_DMRS_1 = table_6_4_1_3_1_1_1_N_SF_mprime_PUCCH_1_m1Hop[nrofSymbols-1]; // only if intra-slot hopping enabled mprime = 1 (DM-RS) } } } int16_t H_re[12],H_im[12],H1_re[12],H1_im[12]; memset(H_re,0,12*sizeof(int16_t)); memset(H_im,0,12*sizeof(int16_t)); memset(H1_re,0,12*sizeof(int16_t)); memset(H1_im,0,12*sizeof(int16_t)); //averaging channel coefficients for(l=0;l<=ceil(nrofSymbols/2);l++){ if(intraSlotFrequencyHopping==0){ for(int n=0;n<12;n++){ H_re[n]=round(z_dmrs_re_rx[l*12+n]/ceil(nrofSymbols/2))+H_re[n]; H_im[n]=round(z_dmrs_im_rx[l*12+n]/ceil(nrofSymbols/2))+H_im[n]; } } else{ if(l<round(nrofSymbols/4)){ for(int n=0;n<12;n++){ H_re[n]=round(z_dmrs_re_rx[l*12+n]/round(nrofSymbols/4))+H_re[n]; H_im[n]=round(z_dmrs_im_rx[l*12+n]/round(nrofSymbols/4))+H_im[n]; } } else{ for(int n=0;n<12;n++){ H1_re[n]=round(z_dmrs_re_rx[l*12+n]/(ceil(nrofSymbols/2)-round(nrofSymbols/4)))+H1_re[n]; H1_im[n]=round(z_dmrs_im_rx[l*12+n]/(ceil(nrofSymbols/2))-round(nrofSymbols/4))+H1_im[n]; } } } } //averaging information sequences for(l=0;l<floor(nrofSymbols/2);l++){ if(intraSlotFrequencyHopping==0){ for(int n=0;n<12;n++){ y_n_re[n]=round(z_re_rx[l*12+n]/floor(nrofSymbols/2))+y_n_re[n]; y_n_im[n]=round(z_im_rx[l*12+n]/floor(nrofSymbols/2))+y_n_im[n]; } } else{ if(l<floor(nrofSymbols/4)){ for(int n=0;n<12;n++){ y_n_re[n]=round(z_re_rx[l*12+n]/floor(nrofSymbols/4))+y_n_re[n]; y_n_im[n]=round(z_im_rx[l*12+n]/floor(nrofSymbols/4))+y_n_im[n]; } } else{ for(int n=0;n<12;n++){ y1_n_re[n]=round(z_re_rx[l*12+n]/round(nrofSymbols/4))+y1_n_re[n]; y1_n_im[n]=round(z_im_rx[l*12+n]/round(nrofSymbols/4))+y1_n_im[n]; } } } } // mrc combining to obtain z_re and z_im if(intraSlotFrequencyHopping==0){ for(int n=0;n<12;n++){ d_re = round(((int16_t)(((((int32_t)(H_re[n])*y_n_re[n])>>15) + (((int32_t)(H_im[n])*y_n_im[n])>>15))>>1))/12)+d_re; d_im = round(((int16_t)(((((int32_t)(H_re[n])*y_n_im[n])>>15) - (((int32_t)(H_im[n])*y_n_re[n])>>15))>>1))/12)+d_im; } } else{ for(int n=0;n<12;n++){ d_re = round(((int16_t)(((((int32_t)(H_re[n])*y_n_re[n])>>15) + (((int32_t)(H_im[n])*y_n_im[n])>>15))>>1))/12)+d_re; d_im = round(((int16_t)(((((int32_t)(H_re[n])*y_n_im[n])>>15) - (((int32_t)(H_im[n])*y_n_re[n])>>15))>>1))/12)+d_im; d1_re = round(((int16_t)(((((int32_t)(H1_re[n])*y1_n_re[n])>>15) + (((int32_t)(H1_im[n])*y1_n_im[n])>>15))>>1))/12)+d1_re; d1_im = round(((int16_t)(((((int32_t)(H1_re[n])*y1_n_im[n])>>15) - (((int32_t)(H1_im[n])*y1_n_re[n])>>15))>>1))/12)+d1_im; } d_re=round(d_re/2); d_im=round(d_im/2); d1_re=round(d1_re/2); d1_im=round(d1_im/2); d_re=d_re+d1_re; d_im=d_im+d1_im; } //Decoding QPSK or BPSK symbols to obtain payload bits if(nr_bit==1){ if((d_re+d_im)>0){ *payload=0; } else{ *payload=1; } } else if(nr_bit==2){ if((d_re>0)&&(d_im>0)){ *payload=0; } else if((d_re<0)&&(d_im>0)){ *payload=1; } else if((d_re>0)&&(d_im<0)){ *payload=2; } else{ *payload=3; } } }