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rfsimulator: add delay and Doppler simulation for circular orbit and add according channel models SAT_LEO_TRANS and SAT_LEO_REGEN

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Delay and Doppler computation is done as in Matlab function dopplerShiftCircularOrbit:
https://de.mathworks.com/help/satcom/ref/dopplershiftcircularorbit.html
This commit is contained in:
Thomas Schlichter
2024-08-20 16:46:25 +02:00
parent 68b07d542c
commit 6a8edaf317
4 changed files with 149 additions and 14 deletions
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radio/rfsimulator/simulator.c
+6
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@@ -709,6 +709,10 @@ static bool flushInput(rfsimulator_state_t *t, int timeout, int nsamps_for_initi
samplesVoid[i]=(void *)&v;
rfsimulator_write_internal(t, t->lastWroteTS > 1 ? t->lastWroteTS - 1 : 0, samplesVoid, 1, t->tx_num_channels, 1, false);
buffer_t *b = &t->buf[conn_sock];
if (b->channel_model)
b->channel_model->start_TS = t->lastWroteTS;
} else {
if ( events[nbEv].events & (EPOLLHUP | EPOLLERR | EPOLLRDHUP) ) {
socketError(t,fd);
@@ -761,6 +765,8 @@ static bool flushInput(rfsimulator_state_t *t, int timeout, int nsamps_for_initi
nsamps_for_initial;
LOG_D(HW, "UE got first timestamp: starting at %lu\n", t->nextRxTstamp);
b->trashingPacket=true;
if (b->channel_model)
b->channel_model->start_TS = t->nextRxTstamp;
} else if (b->lastReceivedTS < b->th.timestamp) {
int nbAnt= b->th.nbAnt;