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Correct PRACH preamble tx power calculation.

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Removed arbitrary offset of 30dB.
Changed sign for pathloss: pathloss calculated in compute_nr_SSB_PL is the difference between transmitted and received power.
Transmission power for preamble should compensate the pathloss, therefore power should increase with pathloss.
This commit is contained in:
Bartosz Podrygajlo
2024-05-08 12:19:08 +02:00
parent 82bd07ebd5
commit 70f536a0f0
1 changed files with 1 additions and 1 deletions
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openair2/LAYER2/NR_MAC_UE/nr_ra_procedures.c
+1 -1
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@@ -45,7 +45,7 @@ int16_t get_prach_tx_power(NR_UE_MAC_INST_t *mac)
{
RA_config_t *ra = &mac->ra;
int16_t pathloss = compute_nr_SSB_PL(mac, mac->ssb_measurements.ssb_rsrp_dBm);
int16_t ra_preamble_rx_power = (int16_t)(ra->prach_resources.ra_PREAMBLE_RECEIVED_TARGET_POWER - pathloss + 30);
int16_t ra_preamble_rx_power = (int16_t)(ra->prach_resources.ra_PREAMBLE_RECEIVED_TARGET_POWER + pathloss);
return min(ra->prach_resources.RA_PCMAX, ra_preamble_rx_power);
}