From 9d498e1a0923ae0d3e30813be4abeedcc3dd332e Mon Sep 17 00:00:00 2001 From: luis_pereira87 Date: Mon, 15 Feb 2021 16:49:07 +0000 Subject: [PATCH] Improve PDSCH DMRS modulation for numDmrsCdmGrpsNoData=1 --- openair1/PHY/NR_TRANSPORT/nr_dlsch.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/openair1/PHY/NR_TRANSPORT/nr_dlsch.c b/openair1/PHY/NR_TRANSPORT/nr_dlsch.c index 17c5ef68a2..66fc987f6d 100644 --- a/openair1/PHY/NR_TRANSPORT/nr_dlsch.c +++ b/openair1/PHY/NR_TRANSPORT/nr_dlsch.c @@ -147,12 +147,11 @@ uint8_t nr_generate_pdsch(PHY_VARS_gNB *gNB, uint16_t n_dmrs; if (rel15->dmrsConfigType==NFAPI_NR_DMRS_TYPE1) { nb_re_dmrs = 6*rel15->numDmrsCdmGrpsNoData; - n_dmrs = ((rel15->rbSize+rel15->rbStart)*6)<<1; } else { nb_re_dmrs = 4*rel15->numDmrsCdmGrpsNoData; - n_dmrs = ((rel15->rbSize+rel15->rbStart)*4)<<1; } + n_dmrs = (rel15->rbSize+rel15->rbStart)*nb_re_dmrs; uint16_t dmrs_symbol_map = rel15->dlDmrsSymbPos;//single DMRS: 010000100 Double DMRS 110001100 uint8_t dmrs_len = get_num_dmrs(rel15->dlDmrsSymbPos); @@ -271,10 +270,10 @@ uint8_t nr_generate_pdsch(PHY_VARS_gNB *gNB, /// DMRS QPSK modulation 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 + nr_modulation(pdsch_dmrs[l][0], n_dmrs*2, DMRS_MOD_ORDER, mod_dmrs[l]); // currently only codeword 0 is modulated. Qm = 2 as DMRS is QPSK modulated #ifdef DEBUG_DLSCH - printf("DMRS modulation (symbol %d, %d symbols, type %d):\n", l, n_dmrs>>1, dmrs_Type); + printf("DMRS modulation (symbol %d, %d symbols, type %d):\n", l, n_dmrs, dmrs_Type); for (int i=0; i>4; i++) { for (int j=0; j<8; j++) { printf("%d %d\t", mod_dmrs[l][((i<<3)+j)<<1], mod_dmrs[l][(((i<<3)+j)<<1)+1]);