Channel estimation of all PUSCH dmrs symbols before compensation
This commit is contained in:
Raghavendra Dinavahi
committed by
Thomas Schlichter
Thomas Schlichter
parent
5edee9b546
commit
efb43528bc
@@ -133,15 +133,13 @@ NR_gNB_DLSCH_t *new_gNB_dlsch(NR_DL_FRAME_PARMS *frame_parms,
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@param ue Pointer to PHY variables
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@param UE_id id of current UE
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@param frame Frame number
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@param nr_tti_rx TTI number
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@param symbol Symbol on which to act (within-in nr_TTI_rx)
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@param slot Slot number
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@param harq_pid HARQ process ID
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*/
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int nr_rx_pusch(PHY_VARS_gNB *gNB,
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uint8_t UE_id,
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uint32_t frame,
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uint8_t nr_tti_rx,
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unsigned char symbol,
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uint8_t slot,
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unsigned char harq_pid);
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/** \brief This function performs RB extraction (signal and channel estimates) (currently signal only until channel estimation and compensation are implemented)
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@@ -12,6 +12,8 @@
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//#define DEBUG_RB_EXT
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//#define DEBUG_CH_MAG
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#define INVALID_VALUE 255
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void nr_idft(int32_t *z, uint32_t Msc_PUSCH)
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{
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@@ -1157,12 +1159,11 @@ void nr_ulsch_detection_mrc(NR_DL_FRAME_PARMS *frame_parms,
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int nr_rx_pusch(PHY_VARS_gNB *gNB,
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uint8_t ulsch_id,
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uint32_t frame,
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uint8_t nr_tti_rx,
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unsigned char symbol,
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uint8_t slot,
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unsigned char harq_pid)
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{
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uint8_t aarx, aatx, dmrs_symbol_flag; // dmrs_symbol_flag, a flag to indicate DMRS REs in current symbol
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uint8_t aarx, aatx;
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uint32_t nb_re_pusch, bwp_start_subcarrier;
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int avgs;
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int avg[4];
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@@ -1170,204 +1171,194 @@ int nr_rx_pusch(PHY_VARS_gNB *gNB,
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NR_DL_FRAME_PARMS *frame_parms = &gNB->frame_parms;
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nfapi_nr_pusch_pdu_t *rel15_ul = &gNB->ulsch[ulsch_id][0]->harq_processes[harq_pid]->ulsch_pdu;
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dmrs_symbol_flag = 0;
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if(symbol == rel15_ul->start_symbol_index){
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gNB->pusch_vars[ulsch_id]->dmrs_symbol = 0;
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gNB->pusch_vars[ulsch_id]->cl_done = 0;
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}
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gNB->pusch_vars[ulsch_id]->dmrs_symbol = INVALID_VALUE;
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gNB->pusch_vars[ulsch_id]->cl_done = 0;
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bwp_start_subcarrier = ((rel15_ul->rb_start + rel15_ul->bwp_start)*NR_NB_SC_PER_RB + frame_parms->first_carrier_offset) % frame_parms->ofdm_symbol_size;
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dmrs_symbol_flag = ((rel15_ul->ul_dmrs_symb_pos)>>symbol)&0x01;
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LOG_D(PHY,"symbol %d bwp_start_subcarrier %d, rb_start %d, first_carrier_offset %d\n",symbol,bwp_start_subcarrier,rel15_ul->rb_start,frame_parms->first_carrier_offset);
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LOG_D(PHY,"bwp_start_subcarrier %d, rb_start %d, first_carrier_offset %d\n", bwp_start_subcarrier, rel15_ul->rb_start, frame_parms->first_carrier_offset);
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LOG_D(PHY,"ul_dmrs_symb_pos %x\n",rel15_ul->ul_dmrs_symb_pos);
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if (dmrs_symbol_flag == 1){
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if (((rel15_ul->ul_dmrs_symb_pos)>>((symbol+1)%frame_parms->symbols_per_slot))&0x01)
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AssertFatal(1==0,"Double DMRS configuration is not yet supported\n");
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if (rel15_ul->dmrs_config_type == 0) {
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// if no data in dmrs cdm group is 1 only even REs have no data
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// if no data in dmrs cdm group is 2 both odd and even REs have no data
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nb_re_pusch = rel15_ul->rb_size *(12 - (rel15_ul->num_dmrs_cdm_grps_no_data*6));
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}
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else {
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nb_re_pusch = rel15_ul->rb_size *(12 - (rel15_ul->num_dmrs_cdm_grps_no_data*4));
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}
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LOG_D(PHY,"dmrs_symbol: nb_re_pusch %d\n",nb_re_pusch);
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gNB->pusch_vars[ulsch_id]->dmrs_symbol = symbol;
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} else {
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nb_re_pusch = rel15_ul->rb_size * NR_NB_SC_PER_RB;
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}
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//----------------------------------------------------------
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//--------------------- Channel estimation ---------------------
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//----------------------------------------------------------
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start_meas(&gNB->ulsch_channel_estimation_stats);
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if (dmrs_symbol_flag == 1) {
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nr_pusch_channel_estimation(gNB,
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nr_tti_rx,
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0, // p
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symbol,
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ulsch_id,
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bwp_start_subcarrier,
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rel15_ul);
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for(uint8_t symbol = rel15_ul->start_symbol_index; symbol < (rel15_ul->start_symbol_index + rel15_ul->nr_of_symbols); symbol++) {
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uint8_t dmrs_symbol_flag = (rel15_ul->ul_dmrs_symb_pos >> symbol) & 0x01;
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LOG_D(PHY,"symbol %d, dmrs_symbol_flag :%d\n", symbol, dmrs_symbol_flag);
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if (dmrs_symbol_flag == 1) {
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if (gNB->pusch_vars[ulsch_id]->dmrs_symbol == INVALID_VALUE)
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gNB->pusch_vars[ulsch_id]->dmrs_symbol = symbol;
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nr_gnb_measurements(gNB, ulsch_id, harq_pid, symbol);
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nr_pusch_channel_estimation(gNB,
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slot,
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0, // p
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symbol,
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ulsch_id,
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bwp_start_subcarrier,
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rel15_ul);
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for (aarx = 0; aarx < frame_parms->nb_antennas_rx; aarx++) {
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gNB->pusch_vars[ulsch_id]->ulsch_power[aarx] = signal_energy_nodc(&gNB->pusch_vars[ulsch_id]->ul_ch_estimates[aarx][symbol*frame_parms->ofdm_symbol_size],
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rel15_ul->rb_size*12);
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if (gNB->pusch_vars[ulsch_id]->ulsch_power[aarx]==1) return (1);
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nr_gnb_measurements(gNB, ulsch_id, harq_pid, symbol);
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for (aarx = 0; aarx < frame_parms->nb_antennas_rx; aarx++) {
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gNB->pusch_vars[ulsch_id]->ulsch_power[aarx] = signal_energy_nodc(&gNB->pusch_vars[ulsch_id]->ul_ch_estimates[aarx][symbol*frame_parms->ofdm_symbol_size],
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rel15_ul->rb_size*12);
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if (gNB->pusch_vars[ulsch_id]->ulsch_power[aarx] == 1)
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return 1;
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}
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}
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}
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stop_meas(&gNB->ulsch_channel_estimation_stats);
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//----------------------------------------------------------
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//--------------------- RBs extraction ---------------------
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//----------------------------------------------------------
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gNB->pusch_vars[ulsch_id]->ul_valid_re_per_slot[symbol] = nb_re_pusch;
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#ifdef __AVX2__
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int off = ((rel15_ul->rb_size&1) == 1)? 4:0;
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#else
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int off = 0;
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#endif
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uint32_t rxdataF_ext_offset = 0;
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if (nb_re_pusch > 0) {
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for(uint8_t symbol = rel15_ul->start_symbol_index; symbol < (rel15_ul->start_symbol_index + rel15_ul->nr_of_symbols); symbol++) {
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uint8_t dmrs_symbol_flag = (rel15_ul->ul_dmrs_symb_pos >> symbol) & 0x01;
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if (dmrs_symbol_flag == 1) {
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if ((rel15_ul->ul_dmrs_symb_pos >> ((symbol + 1) % frame_parms->symbols_per_slot)) & 0x01)
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AssertFatal(1==0,"Double DMRS configuration is not yet supported\n");
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start_meas(&gNB->ulsch_rbs_extraction_stats);
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nr_ulsch_extract_rbs_single(gNB->common_vars.rxdataF,
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gNB->pusch_vars[ulsch_id],
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symbol,
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dmrs_symbol_flag,
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rel15_ul,
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frame_parms);
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stop_meas(&gNB->ulsch_rbs_extraction_stats);
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gNB->pusch_vars[ulsch_id]->dmrs_symbol = symbol;
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//----------------------------------------------------------
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//--------------------- Channel Scaling --------------------
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//----------------------------------------------------------
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nr_ulsch_scale_channel(gNB->pusch_vars[ulsch_id]->ul_ch_estimates_ext,
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frame_parms,
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gNB->ulsch[ulsch_id],
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symbol,
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dmrs_symbol_flag,
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rel15_ul->rb_size,
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rel15_ul->dmrs_config_type);
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if (gNB->pusch_vars[ulsch_id]->cl_done==0) {
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nr_ulsch_channel_level(gNB->pusch_vars[ulsch_id]->ul_ch_estimates_ext,
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frame_parms,
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avg,
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symbol,
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nb_re_pusch,
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rel15_ul->rb_size);
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avgs = 0;
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for (aatx=0;aatx<nb_antennas_ue_tx;aatx++)
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for (aarx=0;aarx<frame_parms->nb_antennas_rx;aarx++)
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avgs = cmax(avgs,avg[(aatx<<1)+aarx]);
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gNB->pusch_vars[ulsch_id]->log2_maxh = (log2_approx(avgs)/2)+3;
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gNB->pusch_vars[ulsch_id]->cl_done = 1;
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if (rel15_ul->dmrs_config_type == 0) {
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// if no data in dmrs cdm group is 1 only even REs have no data
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// if no data in dmrs cdm group is 2 both odd and even REs have no data
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nb_re_pusch = rel15_ul->rb_size *(12 - (rel15_ul->num_dmrs_cdm_grps_no_data*6));
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}
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else {
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nb_re_pusch = rel15_ul->rb_size *(12 - (rel15_ul->num_dmrs_cdm_grps_no_data*4));
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}
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} else {
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nb_re_pusch = rel15_ul->rb_size * NR_NB_SC_PER_RB;
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}
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//----------------------------------------------------------
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//--------------------- Channel Compensation ---------------
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//----------------------------------------------------------
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gNB->pusch_vars[ulsch_id]->ul_valid_re_per_slot[symbol] = nb_re_pusch;
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LOG_D(PHY,"symbol %d: nb_re_pusch %d, DMRS symbl used for Chest :%d \n", symbol, nb_re_pusch, gNB->pusch_vars[ulsch_id]->dmrs_symbol);
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start_meas(&gNB->ulsch_channel_compensation_stats);
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nr_ulsch_channel_compensation(gNB->pusch_vars[ulsch_id]->rxdataF_ext,
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gNB->pusch_vars[ulsch_id]->ul_ch_estimates_ext,
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gNB->pusch_vars[ulsch_id]->ul_ch_mag0,
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gNB->pusch_vars[ulsch_id]->ul_ch_magb0,
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gNB->pusch_vars[ulsch_id]->rxdataF_comp,
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(nb_antennas_ue_tx>1) ? gNB->pusch_vars[ulsch_id]->rho : NULL,
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frame_parms,
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//----------------------------------------------------------
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//--------------------- RBs extraction ---------------------
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//----------------------------------------------------------
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if (nb_re_pusch > 0) {
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start_meas(&gNB->ulsch_rbs_extraction_stats);
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nr_ulsch_extract_rbs_single(gNB->common_vars.rxdataF,
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gNB->pusch_vars[ulsch_id],
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symbol,
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dmrs_symbol_flag,
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rel15_ul->qam_mod_order,
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rel15_ul->rb_size,
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gNB->pusch_vars[ulsch_id]->log2_maxh);
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stop_meas(&gNB->ulsch_channel_compensation_stats);
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rel15_ul,
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frame_parms);
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stop_meas(&gNB->ulsch_rbs_extraction_stats);
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start_meas(&gNB->ulsch_mrc_stats);
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nr_ulsch_detection_mrc(frame_parms,
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gNB->pusch_vars[ulsch_id]->rxdataF_comp,
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gNB->pusch_vars[ulsch_id]->ul_ch_mag,
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gNB->pusch_vars[ulsch_id]->ul_ch_magb,
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symbol,
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rel15_ul->rb_size);
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stop_meas(&gNB->ulsch_mrc_stats);
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//----------------------------------------------------------
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//--------------------- Channel Scaling --------------------
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//----------------------------------------------------------
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nr_ulsch_scale_channel(gNB->pusch_vars[ulsch_id]->ul_ch_estimates_ext,
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frame_parms,
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gNB->ulsch[ulsch_id],
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symbol,
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dmrs_symbol_flag,
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rel15_ul->rb_size,
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rel15_ul->dmrs_config_type);
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if (gNB->pusch_vars[ulsch_id]->cl_done==0) {
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nr_ulsch_channel_level(gNB->pusch_vars[ulsch_id]->ul_ch_estimates_ext,
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frame_parms,
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avg,
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symbol,
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nb_re_pusch,
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rel15_ul->rb_size);
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avgs = 0;
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for (aatx=0;aatx<nb_antennas_ue_tx;aatx++)
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for (aarx=0;aarx<frame_parms->nb_antennas_rx;aarx++)
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avgs = cmax(avgs,avg[(aatx<<1)+aarx]);
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gNB->pusch_vars[ulsch_id]->log2_maxh = (log2_approx(avgs)/2)+3;
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gNB->pusch_vars[ulsch_id]->cl_done = 1;
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}
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//----------------------------------------------------------
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//--------------------- Channel Compensation ---------------
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//----------------------------------------------------------
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start_meas(&gNB->ulsch_channel_compensation_stats);
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nr_ulsch_channel_compensation(gNB->pusch_vars[ulsch_id]->rxdataF_ext,
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gNB->pusch_vars[ulsch_id]->ul_ch_estimates_ext,
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gNB->pusch_vars[ulsch_id]->ul_ch_mag0,
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gNB->pusch_vars[ulsch_id]->ul_ch_magb0,
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gNB->pusch_vars[ulsch_id]->rxdataF_comp,
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(nb_antennas_ue_tx>1) ? gNB->pusch_vars[ulsch_id]->rho : NULL,
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frame_parms,
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symbol,
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dmrs_symbol_flag,
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rel15_ul->qam_mod_order,
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rel15_ul->rb_size,
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gNB->pusch_vars[ulsch_id]->log2_maxh);
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stop_meas(&gNB->ulsch_channel_compensation_stats);
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start_meas(&gNB->ulsch_mrc_stats);
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nr_ulsch_detection_mrc(frame_parms,
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gNB->pusch_vars[ulsch_id]->rxdataF_comp,
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gNB->pusch_vars[ulsch_id]->ul_ch_mag,
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gNB->pusch_vars[ulsch_id]->ul_ch_magb,
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symbol,
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rel15_ul->rb_size);
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stop_meas(&gNB->ulsch_mrc_stats);
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if (rel15_ul->transform_precoding == transform_precoder_enabled) {
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if (rel15_ul->transform_precoding == transform_precoder_enabled) {
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#ifdef __AVX2__
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// For odd number of resource blocks need byte alignment to multiple of 8
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int nb_re_pusch2 = nb_re_pusch + (nb_re_pusch&7);
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#else
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int nb_re_pusch2 = nb_re_pusch;
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#endif
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// perform IDFT operation on the compensated rxdata if transform precoding is enabled
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nr_idft(&gNB->pusch_vars[ulsch_id]->rxdataF_comp[0][symbol * nb_re_pusch2], nb_re_pusch);
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LOG_D(PHY,"Transform precoding being done on data- symbol: %d, nb_re_pusch: %d\n", symbol, nb_re_pusch);
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}
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#endif
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// perform IDFT operation on the compensated rxdata if transform precoding is enabled
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nr_idft(&gNB->pusch_vars[ulsch_id]->rxdataF_comp[0][symbol * nb_re_pusch2], nb_re_pusch);
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LOG_D(PHY,"Transform precoding being done on data- symbol: %d, nb_re_pusch: %d\n", symbol, nb_re_pusch);
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}
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//----------------------------------------------------------
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//--------------------- PTRS Processing --------------------
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//----------------------------------------------------------
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//----------------------------------------------------------
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//--------------------- PTRS Processing --------------------
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//----------------------------------------------------------
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/* In case PTRS is enabled then LLR will be calculated after PTRS symbols are processed *
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* otherwise LLR are calculated for each symbol based upon DMRS channel estimates only. */
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if (rel15_ul->pdu_bit_map & PUSCH_PDU_BITMAP_PUSCH_PTRS) {
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start_meas(&gNB->ulsch_ptrs_processing_stats);
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nr_pusch_ptrs_processing(gNB,
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frame_parms,
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rel15_ul,
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ulsch_id,
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slot,
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symbol,
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nb_re_pusch);
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stop_meas(&gNB->ulsch_ptrs_processing_stats);
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/* In case PTRS is enabled then LLR will be calculated after PTRS symbols are processed *
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* otherwise LLR are calculated for each symbol based upon DMRS channel estimates only. */
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if (rel15_ul->pdu_bit_map & PUSCH_PDU_BITMAP_PUSCH_PTRS)
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{
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start_meas(&gNB->ulsch_ptrs_processing_stats);
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nr_pusch_ptrs_processing(gNB,
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frame_parms,
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rel15_ul,
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ulsch_id,
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nr_tti_rx,
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symbol,
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nb_re_pusch);
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stop_meas(&gNB->ulsch_ptrs_processing_stats);
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/* Subtract total PTRS RE's in the symbol from PUSCH RE's */
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gNB->pusch_vars[ulsch_id]->ul_valid_re_per_slot[symbol] -= gNB->pusch_vars[ulsch_id]->ptrs_re_per_slot;
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}
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/* Subtract total PTRS RE's in the symbol from PUSCH RE's */
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gNB->pusch_vars[ulsch_id]->ul_valid_re_per_slot[symbol] -= gNB->pusch_vars[ulsch_id]->ptrs_re_per_slot;
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}
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}
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/*---------------------------------------------------------------------------------------------------- */
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/*-------------------- LLRs computation -------------------------------------------------------------*/
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/*-----------------------------------------------------------------------------------------------------*/
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if(symbol == (rel15_ul->start_symbol_index + rel15_ul->nr_of_symbols -1)) {
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#ifdef __AVX2__
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int off = ((rel15_ul->rb_size&1) == 1)? 4:0;
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#else
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int off = 0;
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#endif
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uint32_t rxdataF_ext_offset = 0;
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||||
for(uint8_t i =rel15_ul->start_symbol_index; i< (rel15_ul->start_symbol_index + rel15_ul->nr_of_symbols);i++) {
|
||||
/*---------------------------------------------------------------------------------------------------- */
|
||||
/*-------------------- LLRs computation -------------------------------------------------------------*/
|
||||
/*-----------------------------------------------------------------------------------------------------*/
|
||||
start_meas(&gNB->ulsch_llr_stats);
|
||||
nr_ulsch_compute_llr(&gNB->pusch_vars[ulsch_id]->rxdataF_comp[0][i * (off + rel15_ul->rb_size * NR_NB_SC_PER_RB)],
|
||||
gNB->pusch_vars[ulsch_id]->ul_ch_mag0,
|
||||
gNB->pusch_vars[ulsch_id]->ul_ch_magb0,
|
||||
&gNB->pusch_vars[ulsch_id]->llr[rxdataF_ext_offset * rel15_ul->qam_mod_order],
|
||||
rel15_ul->rb_size,
|
||||
gNB->pusch_vars[ulsch_id]->ul_valid_re_per_slot[i],
|
||||
i,
|
||||
rel15_ul->qam_mod_order);
|
||||
nr_ulsch_compute_llr(&gNB->pusch_vars[ulsch_id]->rxdataF_comp[0][symbol * (off + rel15_ul->rb_size * NR_NB_SC_PER_RB)],
|
||||
gNB->pusch_vars[ulsch_id]->ul_ch_mag0,
|
||||
gNB->pusch_vars[ulsch_id]->ul_ch_magb0,
|
||||
&gNB->pusch_vars[ulsch_id]->llr[rxdataF_ext_offset * rel15_ul->qam_mod_order],
|
||||
rel15_ul->rb_size,
|
||||
gNB->pusch_vars[ulsch_id]->ul_valid_re_per_slot[symbol],
|
||||
symbol,
|
||||
rel15_ul->qam_mod_order);
|
||||
stop_meas(&gNB->ulsch_llr_stats);
|
||||
rxdataF_ext_offset += gNB->pusch_vars[ulsch_id]->ul_valid_re_per_slot[i];
|
||||
}// symbol loop
|
||||
}// last symbol check
|
||||
|
||||
return (0);
|
||||
rxdataF_ext_offset += gNB->pusch_vars[ulsch_id]->ul_valid_re_per_slot[symbol];
|
||||
}
|
||||
} // symbol loop
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
@@ -638,19 +638,15 @@ void phy_procedures_gNB_uespec_RX(PHY_VARS_gNB *gNB, int frame_rx, int slot_rx)
|
||||
|
||||
pusch_decode_done = 1;
|
||||
|
||||
uint8_t symbol_start = ulsch_harq->ulsch_pdu.start_symbol_index;
|
||||
uint8_t symbol_end = symbol_start + ulsch_harq->ulsch_pdu.nr_of_symbols;
|
||||
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_NR_RX_PUSCH,1);
|
||||
start_meas(&gNB->rx_pusch_stats);
|
||||
for(uint8_t symbol = symbol_start; symbol < symbol_end; symbol++) {
|
||||
no_sig = nr_rx_pusch(gNB, ULSCH_id, frame_rx, slot_rx, symbol, harq_pid);
|
||||
if (no_sig) {
|
||||
LOG_I(PHY, "PUSCH not detected in symbol %d\n",symbol);
|
||||
nr_fill_indication(gNB,frame_rx, slot_rx, ULSCH_id, harq_pid, 1);
|
||||
return;
|
||||
}
|
||||
}
|
||||
stop_meas(&gNB->rx_pusch_stats);
|
||||
start_meas(&gNB->rx_pusch_stats);
|
||||
no_sig = nr_rx_pusch(gNB, ULSCH_id, frame_rx, slot_rx, harq_pid);
|
||||
if (no_sig) {
|
||||
LOG_I(PHY, "PUSCH not detected in frame %d, slot %d\n", frame_rx, slot_rx);
|
||||
nr_fill_indication(gNB, frame_rx, slot_rx, ULSCH_id, harq_pid, 1);
|
||||
return;
|
||||
}
|
||||
stop_meas(&gNB->rx_pusch_stats);
|
||||
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_NR_RX_PUSCH,0);
|
||||
//LOG_M("rxdataF_comp.m","rxF_comp",gNB->pusch_vars[0]->rxdataF_comp[0],6900,1,1);
|
||||
//LOG_M("rxdataF_ext.m","rxF_ext",gNB->pusch_vars[0]->rxdataF_ext[0],6900,1,1);
|
||||
|
||||
Reference in New Issue
Block a user