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feat(phy): add a new tx_rf_symbols function to allow per symbol transmission

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Signed-off-by: Bartosz Podrygajlo <bartosz.podrygajlo@openairinterface.org>
This commit is contained in:
Bartosz Podrygajlo
2025-09-25 11:52:39 +02:00
parent 21329e1b70
commit ecfe769205
1 changed files with 24 additions and 15 deletions
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39
executables/nr-ru.c
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@@ -494,7 +494,7 @@ static radio_tx_gpio_flag_t get_gpio_flags(RU_t *ru, int slot)
return flags_gpio;
}
void tx_rf(RU_t *ru, int frame,int slot, uint64_t timestamp)
void tx_rf_symbols(RU_t *ru, int frame, int slot, uint64_t timestamp, int start_symbol, int num_symbols)
{
RU_proc_t *proc = &ru->proc;
NR_DL_FRAME_PARMS *fp = ru->nr_frame_parms;
@@ -521,22 +521,23 @@ void tx_rf(RU_t *ru, int frame,int slot, uint64_t timestamp)
txsymb++;
}
AssertFatal(txsymb>0,"illegal txsymb %d\n",txsymb);
AssertFatal(txsymb > 0, "illegal txsymb %d\n", txsymb);
if (fp->slots_per_subframe == 1) {
if (txsymb <= 7)
siglen = (fp->ofdm_symbol_size + fp->nb_prefix_samples0) + (txsymb - 1) * (fp->ofdm_symbol_size + fp->nb_prefix_samples);
else
siglen = 2 * (fp->ofdm_symbol_size + fp->nb_prefix_samples0) + (txsymb - 2) * (fp->ofdm_symbol_size + fp->nb_prefix_samples);
} else {
if(slot%(fp->slots_per_subframe/2))
siglen = txsymb * (fp->ofdm_symbol_size + fp->nb_prefix_samples);
else
siglen = (fp->ofdm_symbol_size + fp->nb_prefix_samples0) + (txsymb - 1) * (fp->ofdm_symbol_size + fp->nb_prefix_samples);
if (txsymb < start_symbol) {
// No DL symbols in this transmission
return;
}
//+ ru->end_of_burst_delay;
flags_burst = TX_BURST_END;
int end_symbol = start_symbol + num_symbols - 1;
if (end_symbol >= txsymb) {
flags_burst = TX_BURST_END;
} else {
flags_burst = TX_BURST_MIDDLE;
}
int num_symbols_this_transmission = min(txsymb, end_symbol) - start_symbol + 1;
siglen = get_samples_symbol_duration(fp, slot, start_symbol, num_symbols_this_transmission);
} else if (slot_type == NR_DOWNLINK_SLOT) {
int prevslot_type = nr_slot_select(cfg,frame,(slot+(fp->slots_per_frame-1))%fp->slots_per_frame);
int nextslot_type = nr_slot_select(cfg,frame,(slot+1)%fp->slots_per_frame);
@@ -548,9 +549,11 @@ void tx_rf(RU_t *ru, int frame,int slot, uint64_t timestamp)
} else {
flags_burst = proc->first_tx == 1 ? TX_BURST_START : TX_BURST_MIDDLE;
}
siglen = get_samples_symbol_duration(fp, slot, start_symbol, num_symbols);
}
} else { // FDD
flags_burst = proc->first_tx == 1 ? TX_BURST_START : TX_BURST_MIDDLE;
siglen = get_samples_symbol_duration(fp, slot, start_symbol, num_symbols);
}
if (ru->openair0_cfg.gpio_controller != RU_GPIO_CONTROL_NONE)
@@ -561,8 +564,9 @@ void tx_rf(RU_t *ru, int frame,int slot, uint64_t timestamp)
int nt = ru->nb_tx;
void *txp[nt];
uint32_t time_offset = get_samples_slot_timestamp(fp, slot) + get_samples_symbol_timestamp(fp, slot, start_symbol);
for (int i = 0; i < nt; i++)
txp[i] = (void *)&ru->common.txdata[i][get_samples_slot_timestamp(fp, slot)] - sf_extension * sizeof(int32_t);
txp[i] = (void *)&ru->common.txdata[i][time_offset] - sf_extension * sizeof(int32_t);
// prepare tx buffer pointers
uint32_t txs = ru->rfdevice.trx_write_func(&ru->rfdevice,
@@ -586,6 +590,11 @@ void tx_rf(RU_t *ru, int frame,int slot, uint64_t timestamp)
10 * log10((double)signal_energy(txp[0], siglen + sf_extension)));
}
void tx_rf(RU_t *ru, int frame, int slot, uint64_t timestamp)
{
tx_rf_symbols(ru, frame, slot, timestamp, 0, 14);
}
void fill_rf_config(RU_t *ru, char *rf_config_file)
{
NR_DL_FRAME_PARMS *fp = ru->nr_frame_parms;