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RFsim: handle additional channel offset from CLI

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Handle extra channel offset coming from CLI parameter prop_delay.
This commit is contained in:
Bartosz Podrygajlo
2025-10-30 11:42:21 +01:00
parent d6bd2d295f
commit 56970390f2
1 changed files with 6 additions and 3 deletions
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9
radio/rfsimulator/simulator.cpp
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@@ -1267,14 +1267,14 @@ static void rfsimulator_read_internal(rfsimulator_state_t *t,
} else {
if (is_first_beam && is_first_peer && (ptr->nbAnt == 1 || nbAnt == 1)) {
// optimization: The buffer is uninitialized so samples can be written directly in the buffer
combine_received_beams(t, ptr->received_packets, timestamp, 1, nsamps, rx_beam_id, samples);
combine_received_beams(t, ptr->received_packets, timestamp - t->chan_offset, 1, nsamps, rx_beam_id, samples);
} else {
std::vector<std::vector<c16_t>> ant_buffers(ptr->nbAnt, std::vector<c16_t>(nsamps, {0, 0}));
c16_t *input[ant_buffers.size()];
for (uint aatx = 0; aatx < ant_buffers.size(); aatx++) {
input[aatx] = ant_buffers[aatx].data();
}
combine_received_beams(t, ptr->received_packets, timestamp, ptr->nbAnt, nsamps, rx_beam_id, input);
combine_received_beams(t, ptr->received_packets, timestamp - t->chan_offset, ptr->nbAnt, nsamps, rx_beam_id, input);
for (int aarx = 0; aarx < nbAnt; aarx++) {
double H_awgn_mimo_coeff[ant_buffers.size()];
for (int aatx = 0; aatx < (int)ant_buffers.size(); aatx++) {
@@ -1455,7 +1455,10 @@ static int rfsimulator_read_beams(openair0_device *device,
if (ptr->conn_sock != -1 && !ptr->received_packets.empty()) {
openair0_timestamp timestamp_to_free = t->nextRxTstamp - 1;
if (ptr->channel_model) {
timestamp_to_free -= (ptr->channel_model->channel_length - 1) + ptr->channel_model->channel_offset;
timestamp_to_free -=
(ptr->channel_model->channel_length - 1) + std::max(ptr->channel_model->channel_offset, t->chan_offset);
} else {
timestamp_to_free -= t->chan_offset;
}
clear_old_packets(ptr->received_packets, timestamp_to_free);
}