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Cleanup RF HW configuration at UE side

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- removed redundant initialisation of variables
- introduced two "RF helpers" function that are replacing shared code in the sync routines
- added a new .c file and updated the cmakelists and .h files
This commit is contained in:
cig
2020-10-27 11:09:17 +01:00
parent 95bd55d8b6
commit 6862affdf4
5 changed files with 141 additions and 83 deletions
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executables/nr-ue.c
+13 -49
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@@ -246,37 +246,25 @@ static void UE_synch(void *arg) {
case pbch:
LOG_I(PHY, "[UE thread Synch] Running Initial Synch (mode %d)\n",UE->mode);
uint64_t dl_carrier, ul_carrier;
double rx_gain_off = 0;
nr_get_carrier_frequencies(&UE->frame_parms, &dl_carrier, &ul_carrier);
if (nr_initial_sync( &syncD->proc, UE, UE->mode,2) == 0) {
freq_offset = UE->common_vars.freq_offset; // frequency offset computed with pss in initial sync
hw_slot_offset = ((UE->rx_offset<<1) / UE->frame_parms.samples_per_subframe * UE->frame_parms.slots_per_subframe) +
round((float)((UE->rx_offset<<1) % UE->frame_parms.samples_per_subframe)/UE->frame_parms.samples_per_slot0);
// rerun with new cell parameters and frequency-offset
for (i=0; i<openair0_cfg[UE->rf_map.card].rx_num_channels; i++) {
openair0_cfg[UE->rf_map.card].rx_gain[UE->rf_map.chain+i] = UE->rx_total_gain_dB;//-USRP_GAIN_OFFSET;
// todo: the freq_offset computed on DL shall be scaled before being applied to UL
nr_rf_card_config(&openair0_cfg[UE->rf_map.card], rx_gain_off, ul_carrier, dl_carrier, freq_offset);
if (freq_offset >= 0)
openair0_cfg[UE->rf_map.card].rx_freq[UE->rf_map.chain+i] += abs(freq_offset);
else
openair0_cfg[UE->rf_map.card].rx_freq[UE->rf_map.chain+i] -= abs(freq_offset);
if (uplink_frequency_offset[0][0])
openair0_cfg[UE->rf_map.card].tx_freq[UE->rf_map.chain+i] =
openair0_cfg[UE->rf_map.card].rx_freq[UE->rf_map.chain+i] + uplink_frequency_offset[0][0];
else
openair0_cfg[UE->rf_map.card].tx_freq[UE->rf_map.chain+i] =
openair0_cfg[UE->rf_map.card].rx_freq[UE->rf_map.chain+i]+(UE->frame_parms.ul_CarrierFreq-UE->frame_parms.dl_CarrierFreq);
//UE->frame_parms.dl_CarrierFreq = openair0_cfg[CC_id].rx_freq[i];
}
LOG_I(PHY,"Got synch: hw_slot_offset %d, carrier off %d Hz, rxgain %d (DL %f Hz, UL %f Hz), UE_scan_carrier %d\n",
LOG_I(PHY,"Got synch: hw_slot_offset %d, carrier off %d Hz, rxgain %f (DL %f Hz, UL %f Hz)\n",
hw_slot_offset,
freq_offset,
UE->rx_total_gain_dB,
openair0_cfg[UE->rf_map.card].rx_gain[0],
openair0_cfg[UE->rf_map.card].rx_freq[0],
openair0_cfg[UE->rf_map.card].tx_freq[0],
UE->UE_scan_carrier);
openair0_cfg[UE->rf_map.card].tx_freq[0]);
// reconfigure for potentially different bandwidth
switch(UE->frame_parms.N_RB_DL) {
@@ -332,45 +320,21 @@ static void UE_synch(void *arg) {
UE->is_synchronized = 1;
}
} else {
// initial sync failed
// calculate new offset and try again
if (UE->UE_scan_carrier == 1) {
uint64_t dl_carrier, ul_carrier;
if (UE->UE_scan_carrier == 1) {
if (freq_offset >= 0)
freq_offset += 100;
freq_offset *= -1;
if (downlink_frequency[0][0])
dl_carrier = downlink_frequency[0][0];
else
dl_carrier = UE->frame_parms.dl_CarrierFreq;
nr_rf_card_config(&openair0_cfg[UE->rf_map.card], rx_gain_off, ul_carrier, dl_carrier, freq_offset);
if (uplink_frequency_offset[0][0])
ul_carrier = dl_carrier + uplink_frequency_offset[0][0];
else
ul_carrier = dl_carrier + UE->frame_parms.ul_CarrierFreq - UE->frame_parms.dl_CarrierFreq;
for (i=0; i<openair0_cfg[UE->rf_map.card].rx_num_channels; i++) {
openair0_cfg[UE->rf_map.card].rx_freq[UE->rf_map.chain+i] = dl_carrier + freq_offset;
openair0_cfg[UE->rf_map.card].tx_freq[UE->rf_map.chain+i] = ul_carrier + freq_offset;
openair0_cfg[UE->rf_map.card].rx_gain[UE->rf_map.chain+i] = UE->rx_total_gain_dB;//-USRP_GAIN_OFFSET;
LOG_I(PHY, "[initial_sync] trying carrier off %d Hz, rxgain %d (DL %f, UL %f)\n",
freq_offset,
UE->rx_total_gain_dB,
openair0_cfg[UE->rf_map.card].rx_freq[UE->rf_map.chain+i],
openair0_cfg[UE->rf_map.card].tx_freq[UE->rf_map.chain+i]);
if (UE->UE_scan_carrier==1)
openair0_cfg[UE->rf_map.card].autocal[UE->rf_map.chain+i] = 1;
}
LOG_I(PHY, "Initial sync failed: trying carrier off %d Hz\n", freq_offset);
if (UE->mode != loop_through_memory)
UE->rfdevice.trx_set_freq_func(&UE->rfdevice,&openair0_cfg[0],0);
}// initial_sync=0
}
break;