diff --git a/openair1/PHY/NR_REFSIG/dmrs_nr.c b/openair1/PHY/NR_REFSIG/dmrs_nr.c index 415e6adfa2..72cb60003e 100644 --- a/openair1/PHY/NR_REFSIG/dmrs_nr.c +++ b/openair1/PHY/NR_REFSIG/dmrs_nr.c @@ -37,6 +37,7 @@ uint8_t allowed_xlsch_re_in_dmrs_symbol(uint16_t k, uint16_t start_sc, + uint16_t ofdm_symbol_size, uint8_t numDmrsCdmGrpsNoData, uint8_t dmrs_type) { uint8_t delta; @@ -44,7 +45,7 @@ uint8_t allowed_xlsch_re_in_dmrs_symbol(uint16_t k, if (k>start_sc) diff = k-start_sc; else - diff = start_sc-k; + diff = (ofdm_symbol_size-start_sc)+k; for (int i = 0; i>5]; int16_t **mod_symbs = (int16_t**)dlsch->mod_symbs; int16_t **tx_layers = (int16_t**)dlsch->txdataF; - int8_t Wf[2], Wt[2], l0, l_prime[2], delta; + int8_t Wf[2], Wt[2], l0, l_prime, delta; uint8_t dmrs_Type = rel15->dmrsConfigType; int nb_re_dmrs; uint16_t n_dmrs; @@ -251,14 +251,13 @@ uint8_t nr_generate_pdsch(PHY_VARS_gNB *gNB, /// DMRS QPSK modulation - - l0 = get_l0(rel15->dlDmrsSymbPos); for (int l=rel15->StartSymbolIndex; lStartSymbolIndex+rel15->NrOfSymbols; l++) { if (rel15->dlDmrsSymbPos & (1 << l)) nr_modulation(pdsch_dmrs[l][0], n_dmrs, DMRS_MOD_ORDER, mod_dmrs[l]); // currently only codeword 0 is modulated. Qm = 2 as DMRS is QPSK modulated } #ifdef DEBUG_DLSCH + l0 = get_l0(rel15->dlDmrsSymbPos); printf("DMRS modulation (single symbol %d, %d symbols, type %d):\n", l0, n_dmrs>>1, dmrs_Type); for (int i=0; i>4; i++) { for (int j=0; j<8; j++) { @@ -286,11 +285,12 @@ uint8_t nr_generate_pdsch(PHY_VARS_gNB *gNB, get_Wt(Wt, ap, dmrs_Type); get_Wf(Wf, ap, dmrs_Type); delta = get_delta(ap, dmrs_Type); - l_prime[0] = 0; // single symbol ap 0 - uint8_t dmrs_symbol = l0+l_prime[0]; + l_prime = 0; // single symbol ap 0 + l0 = get_l0(rel15->dlDmrsSymbPos); + uint8_t dmrs_symbol = l0+l_prime; #ifdef DEBUG_DLSCH_MAPPING printf("DMRS Type %d params for ap %d: Wt %d %d \t Wf %d %d \t delta %d \t l_prime %d \t l0 %d\tDMRS symbol %d\n", - 1+dmrs_Type,ap, Wt[0], Wt[1], Wf[0], Wf[1], delta, l_prime[0], l0, dmrs_symbol); + 1+dmrs_Type,ap, Wt[0], Wt[1], Wf[0], Wf[1], delta, l_prime, l0, dmrs_symbol); #endif uint8_t k_prime=0; uint16_t m=0, n=0, dmrs_idx=0, k=0; @@ -309,8 +309,15 @@ uint8_t nr_generate_pdsch(PHY_VARS_gNB *gNB, if ((rel15->dlDmrsSymbPos & (1 << l)) && (k == ((start_sc+get_dmrs_freq_idx(n, k_prime, delta, dmrs_Type))%(frame_parms->ofdm_symbol_size)))) { - ((int16_t*)txdataF[ap])[((l*frame_parms->ofdm_symbol_size + k)<<1) + (2*txdataF_offset)] = (Wt[l_prime[0]]*Wf[k_prime]*amp*mod_dmrs[l][dmrs_idx<<1]) >> 15; - ((int16_t*)txdataF[ap])[((l*frame_parms->ofdm_symbol_size + k)<<1) + 1 + (2*txdataF_offset)] = (Wt[l_prime[0]]*Wf[k_prime]*amp*mod_dmrs[l][(dmrs_idx<<1) + 1]) >> 15; + if (l==(l0+1)) //take into account the double DMRS symbols + l_prime = 1; + else if (l>(l0+1)){//new DMRS pair + l0 = l; + l_prime = 0; + } + + ((int16_t*)txdataF[ap])[((l*frame_parms->ofdm_symbol_size + k)<<1) + (2*txdataF_offset)] = (Wt[l_prime]*Wf[k_prime]*amp*mod_dmrs[l][dmrs_idx<<1]) >> 15; + ((int16_t*)txdataF[ap])[((l*frame_parms->ofdm_symbol_size + k)<<1) + 1 + (2*txdataF_offset)] = (Wt[l_prime]*Wf[k_prime]*amp*mod_dmrs[l][(dmrs_idx<<1) + 1]) >> 15; #ifdef DEBUG_DLSCH_MAPPING printf("dmrs_idx %d\t l %d \t k %d \t k_prime %d \t n %d \t txdataF: %d %d\n", dmrs_idx, l, k, k_prime, n, ((int16_t*)txdataF[ap])[((l*frame_parms->ofdm_symbol_size + k)<<1) + (2*txdataF_offset)], @@ -323,7 +330,7 @@ uint8_t nr_generate_pdsch(PHY_VARS_gNB *gNB, } else { - if( (!(rel15->dlDmrsSymbPos & (1 << l))) || allowed_xlsch_re_in_dmrs_symbol(k,start_sc,rel15->numDmrsCdmGrpsNoData,dmrs_Type)) { + if( (!(rel15->dlDmrsSymbPos & (1 << l))) || allowed_xlsch_re_in_dmrs_symbol(k,start_sc,frame_parms->ofdm_symbol_size,rel15->numDmrsCdmGrpsNoData,dmrs_Type)) { ((int16_t*)txdataF[ap])[((l*frame_parms->ofdm_symbol_size + k)<<1) + (2*txdataF_offset)] = (amp * tx_layers[ap][m<<1]) >> 15; ((int16_t*)txdataF[ap])[((l*frame_parms->ofdm_symbol_size + k)<<1) + 1 + (2*txdataF_offset)] = (amp * tx_layers[ap][(m<<1) + 1]) >> 15; #ifdef DEBUG_DLSCH_MAPPING diff --git a/openair1/PHY/NR_TRANSPORT/nr_sch_dmrs.c b/openair1/PHY/NR_TRANSPORT/nr_sch_dmrs.c index 04045380eb..e6a9b8c5dc 100644 --- a/openair1/PHY/NR_TRANSPORT/nr_sch_dmrs.c +++ b/openair1/PHY/NR_TRANSPORT/nr_sch_dmrs.c @@ -67,12 +67,12 @@ void get_antenna_ports(uint8_t *ap, uint8_t n_symbs, uint8_t config) { void get_Wt(int8_t *Wt, uint8_t ap, uint8_t config) { for (int i=0; i<2; i++) - *(Wt+i)=(config==NFAPI_NR_DMRS_TYPE1)?(pdsch_dmrs_1[ap][3+i]):(pdsch_dmrs_2[ap][3+i]); + *(Wt+i)=(config==NFAPI_NR_DMRS_TYPE1)?(pdsch_dmrs_1[ap][5+i]):(pdsch_dmrs_2[ap][5+i]); } void get_Wf(int8_t *Wf, uint8_t ap, uint8_t config) { for (int i=0; i<2; i++) - *(Wf+i)=(config==NFAPI_NR_DMRS_TYPE1)?(pdsch_dmrs_1[ap][5+i]):(pdsch_dmrs_2[ap][5+i]); + *(Wf+i)=(config==NFAPI_NR_DMRS_TYPE1)?(pdsch_dmrs_1[ap][3+i]):(pdsch_dmrs_2[ap][3+i]); } uint8_t get_delta(uint8_t ap, uint8_t config) { diff --git a/openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_ue.c b/openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_ue.c index ea79fd467f..61e39aa79d 100644 --- a/openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_ue.c +++ b/openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_ue.c @@ -360,7 +360,7 @@ void nr_ue_ulsch_procedures(PHY_VARS_NR_UE *UE, ptrs_idx++; - } else if (!is_dmrs_sym || allowed_xlsch_re_in_dmrs_symbol(k, start_sc, cdm_grps_no_data, dmrs_type)) { + } else if (!is_dmrs_sym || allowed_xlsch_re_in_dmrs_symbol(k, start_sc, frame_parms->ofdm_symbol_size, cdm_grps_no_data, dmrs_type)) { ((int16_t*)txdataF[ap])[(sample_offsetF)<<1] = ((int16_t *) ulsch_ue->y)[m<<1]; ((int16_t*)txdataF[ap])[((sample_offsetF)<<1) + 1] = ((int16_t *) ulsch_ue->y)[(m<<1) + 1];