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Don't do OFDM mod on PRACH slots

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set number of prach slots in prach_vars in first slot and set as
inactive in last slot so we can skip OFDM modulation in slots that
already has prach.
This commit is contained in:
Sakthivel Velumani
2025-02-25 11:58:41 -05:00
parent a635b4b441
commit a3ba41b234
2 changed files with 61 additions and 43 deletions
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openair1/PHY/defs_nr_UE.h
+1
View File
@@ -298,6 +298,7 @@ typedef struct {
typedef struct {
int16_t amp;
bool active;
int num_prach_slots;
fapi_nr_ul_config_prach_pdu prach_pdu;
} NR_UE_PRACH;
openair1/SCHED_NR_UE/phy_procedures_nr_ue.c
+60 -43
View File
@@ -294,14 +294,19 @@ void phy_procedures_nrUE_TX(PHY_VARS_NR_UE *ue, const UE_nr_rxtx_proc_t *proc, n
pucch_procedures_ue_nr(ue, proc, phy_data, (c16_t **)&txdataF);
LOG_D(PHY, "Sending Uplink data \n");
start_meas_nr_ue_phy(ue, OFDM_MOD_STATS);
nr_ue_pusch_common_procedures(ue,
proc->nr_slot_tx,
&ue->frame_parms,
ue->frame_parms.nb_antennas_tx,
(c16_t **)txdataF,
link_type_ul);
stop_meas_nr_ue_phy(ue, OFDM_MOD_STATS);
// Don't do OFDM Mod if txdata contains prach
const NR_UE_PRACH *prach_var = ue->prach_vars[proc->gNB_id];
if (!prach_var->active) {
start_meas_nr_ue_phy(ue, OFDM_MOD_STATS);
nr_ue_pusch_common_procedures(ue,
proc->nr_slot_tx,
&ue->frame_parms,
ue->frame_parms.nb_antennas_tx,
(c16_t **)txdataF,
link_type_ul);
stop_meas_nr_ue_phy(ue, OFDM_MOD_STATS);
}
nr_ue_prach_procedures(ue, proc);
@@ -1168,45 +1173,57 @@ void nr_ue_prach_procedures(PHY_VARS_NR_UE *ue, const UE_nr_rxtx_proc_t *proc)
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_UE_TX_PRACH, VCD_FUNCTION_IN);
if (ue->prach_vars[gNB_id]->active) {
fapi_nr_ul_config_prach_pdu *prach_pdu = &ue->prach_vars[gNB_id]->prach_pdu;
ue->tx_power_dBm[nr_slot_tx] = prach_pdu->prach_tx_power;
NR_UE_PRACH *prach_var = ue->prach_vars[gNB_id];
if (prach_var->active) {
fapi_nr_ul_config_prach_pdu *prach_pdu = &prach_var->prach_pdu;
// Generate PRACH in first slot. For L839, the following slots are also filled in this slot.
if (prach_pdu->prach_slot == nr_slot_tx) {
ue->tx_power_dBm[nr_slot_tx] = prach_pdu->prach_tx_power;
LOG_D(PHY, "In %s: [UE %d][RAPROC][%d.%d]: Generating PRACH Msg1 (preamble %d, P0_PRACH %d)\n",
__FUNCTION__,
mod_id,
frame_tx,
nr_slot_tx,
prach_pdu->ra_PreambleIndex,
ue->tx_power_dBm[nr_slot_tx]);
ue->prach_vars[gNB_id]->amp = AMP;
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_GENERATE_PRACH, VCD_FUNCTION_IN);
start_meas_nr_ue_phy(ue, PRACH_GEN_STATS);
prach_power = generate_nr_prach(ue, gNB_id, frame_tx, nr_slot_tx);
stop_meas_nr_ue_phy(ue, PRACH_GEN_STATS);
if (cpumeas(CPUMEAS_GETSTATE)) {
LOG_D(PHY,
"[SFN %d.%d] PRACH Proc %5.2f\n",
proc->frame_tx,
proc->nr_slot_tx,
ue->phy_cpu_stats.cpu_time_stats[PRACH_GEN_STATS].p_time / (cpuf * 1000.0));
"In %s: [UE %d][RAPROC][%d.%d]: Generating PRACH Msg1 (preamble %d, P0_PRACH %d)\n",
__FUNCTION__,
mod_id,
frame_tx,
nr_slot_tx,
prach_pdu->ra_PreambleIndex,
ue->tx_power_dBm[nr_slot_tx]);
prach_var->amp = AMP;
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_GENERATE_PRACH, VCD_FUNCTION_IN);
start_meas_nr_ue_phy(ue, PRACH_GEN_STATS);
prach_power = generate_nr_prach(ue, gNB_id, frame_tx, nr_slot_tx);
stop_meas_nr_ue_phy(ue, PRACH_GEN_STATS);
if (cpumeas(CPUMEAS_GETSTATE)) {
LOG_D(PHY,
"[SFN %d.%d] PRACH Proc %5.2f\n",
proc->frame_tx,
proc->nr_slot_tx,
ue->phy_cpu_stats.cpu_time_stats[PRACH_GEN_STATS].p_time / (cpuf * 1000.0));
}
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_GENERATE_PRACH, VCD_FUNCTION_OUT);
LOG_D(PHY,
"In %s: [UE %d][RAPROC][%d.%d]: Generated PRACH Msg1 (TX power PRACH %d dBm, digital power %d dBW (amp %d)\n",
__FUNCTION__,
mod_id,
frame_tx,
nr_slot_tx,
ue->tx_power_dBm[nr_slot_tx],
dB_fixed(prach_power),
ue->prach_vars[gNB_id]->amp);
// set duration of prach slots so we know when to skip OFDM modulation
const int prach_format = ue->prach_vars[gNB_id]->prach_pdu.prach_format;
const int prach_slots = (prach_format < 4) ? get_long_prach_dur(prach_format, ue->frame_parms.numerology_index) : 1;
prach_var->num_prach_slots = prach_slots;
}
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_UE_GENERATE_PRACH, VCD_FUNCTION_OUT);
LOG_D(PHY, "In %s: [UE %d][RAPROC][%d.%d]: Generated PRACH Msg1 (TX power PRACH %d dBm, digital power %d dBW (amp %d)\n",
__FUNCTION__,
mod_id,
frame_tx,
nr_slot_tx,
ue->tx_power_dBm[nr_slot_tx],
dB_fixed(prach_power),
ue->prach_vars[gNB_id]->amp);
ue->prach_vars[gNB_id]->active = false;
// set as inactive in the last slot
prach_var->active = !(nr_slot_tx == (prach_pdu->prach_slot + prach_var->num_prach_slots - 1));
}
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_UE_TX_PRACH, VCD_FUNCTION_OUT);