Commit 76ef9b42 authored by Guido Casati's avatar Guido Casati
Browse files

Fixes to NR UE power measurements

- pathloss, RSSI, RSRP and Noise measurements have been reviewed and wrong
  implementation has been fixed
- referenceSignalPower type in the FAPI struct has been changed to int
  has its range include negative values
parent 39ab3c1e
......@@ -972,7 +972,7 @@ typedef struct
typedef struct
{
uint32_t ss_pbch_power;//SSB Block Power Value: TBD (-60..50 dBm)
int ss_pbch_power;//SSB Block Power Value: TBD (-60..50 dBm)
uint8_t bch_payload;//Defines option selected for generation of BCH payload, see Table 3-13 (v0.0.011 Value: 0: MAC generates the full PBCH payload 1: PHY generates the timing PBCH bits 2: PHY generates the full PBCH payload
uint8_t scs_common;//subcarrierSpacing for common, used for initial access and broadcast message. [38.211 sec 4.2] Value:0->3
......
......@@ -21,16 +21,17 @@
/*! \file nr_ue_measurements.c
* \brief UE measurements routines
* \author R. Knopp, G. Casati
* \author R. Knopp, G. Casati, K. Saaifan
* \date 2020
* \version 0.1
* \company Eurecom, Fraunhofer IIS
* \email: knopp@eurecom.fr, guido.casati@iis.fraunhofer.de
* \email: knopp@eurecom.fr, guido.casati@iis.fraunhofer.de, khodr.saaifan@iis.fraunhofer.de
* \note
* \warning
*/
#include "executables/softmodem-common.h"
#include "executables/nr-softmodem-common.h"
#include "PHY/defs_nr_UE.h"
#include "PHY/phy_extern_nr_ue.h"
#include "common/utils/LOG/log.h"
......@@ -45,7 +46,7 @@
//#define DEBUG_MEAS_UE
//#define DEBUG_RANK_EST
// Returns the pathloss in dBm for the active UL BWP on the selected carrier based on the DL RS associated with the PRACH transmission
// Returns the pathloss in dB for the active UL BWP on the selected carrier based on the DL RS associated with the PRACH transmission
// computation according to clause 7.4 (Physical random access channel) of 3GPP TS 38.213 version 16.3.0 Release 16
// Assumptions:
// - PRACH transmission from a UE is not in response to a detection of a PDCCH order by the UE
......@@ -59,18 +60,17 @@ int16_t get_nr_PL(uint8_t Mod_id, uint8_t CC_id, uint8_t gNB_index){
if (get_softmodem_params()->do_ra){
long referenceSignalPower = ue->nrUE_config.ssb_config.ss_pbch_power;
double rsrp_dBm = 10*log10(ue->measurements.rsrp[gNB_index]) + 30 - ue->rx_total_gain_dB;
pathloss = (int16_t)(10*log10(pow(10, (double)(referenceSignalPower)/10) - pow(10, (double)(rsrp_dBm)/10)));
pathloss = (int16_t)(referenceSignalPower - ue->measurements.rsrp_dBm[gNB_index]);
LOG_D(MAC, "In %s: pathloss %d dBm, UE RX total gain %d dB, referenceSignalPower %ld dBm (%f mW), RSRP %f dBm (%f mW)\n",
LOG_D(MAC, "In %s: pathloss %d dB, UE RX total gain %d dB, referenceSignalPower %ld dBm/RE (%f mW), RSRP %d dBm (%f mW)\n",
__FUNCTION__,
pathloss,
ue->rx_total_gain_dB,
referenceSignalPower,
pow(10, referenceSignalPower/10),
rsrp_dBm,
pow(10, rsrp_dBm/10));
ue->measurements.rsrp_dBm[gNB_index],
pow(10, ue->measurements.rsrp_dBm[gNB_index]/10));
} else {
......@@ -178,9 +178,9 @@ void nr_ue_measurements(PHY_VARS_NR_UE *ue,
ue->measurements.rx_power_avg_dB[gNB_id] = dB_fixed( ue->measurements.rx_power_avg[gNB_id]);
ue->measurements.wideband_cqi_tot[gNB_id] = dB_fixed2(ue->measurements.rx_power_tot[gNB_id], ue->measurements.n0_power_tot);
ue->measurements.wideband_cqi_avg[gNB_id] = dB_fixed2(ue->measurements.rx_power_avg[gNB_id], ue->measurements.n0_power_avg);
ue->measurements.rx_rssi_dBm[gNB_id] = ue->measurements.rx_power_avg_dB[gNB_id] - ue->rx_total_gain_dB;
ue->measurements.rx_rssi_dBm[gNB_id] = ue->measurements.rx_power_avg_dB[gNB_id] + 30 - 10*log10(pow(2, 30)) - ((int)openair0_cfg[0].rx_gain[0] - (int)openair0_cfg[0].rx_gain_offset[0]) - dB_fixed(ue->frame_parms.ofdm_symbol_size);
LOG_D(PHY, "[gNB %d] Slot %d, RSSI %d dBm, RSSI (digital) %d dB, WBandCQI %d dB, rxPwrAvg %d, n0PwrAvg %d\n",
LOG_I(PHY, "[gNB %d] Slot %d, RSSI %d dBm/RE, RSSI (digital) %d dB, WBandCQI %d dB, rxPwrAvg %d, n0PwrAvg %d \n",
gNB_id,
slot,
ue->measurements.rx_rssi_dBm[gNB_id],
......@@ -258,27 +258,37 @@ void nr_ue_rsrp_measurements(PHY_VARS_NR_UE *ue,
ue->measurements.rsrp_filtered[gNB_id] = ue->measurements.rsrp[gNB_id];
LOG_D(PHY, "In %s: [UE %d] slot %d SS-RSRP: %3.1f dBm/RE (%d W)\n",
ue->measurements.rsrp_dBm[gNB_id] = 10*log10(ue->measurements.rsrp[gNB_id]) + 30 - 10*log10(pow(2,30)) - ((int)openair0_cfg[0].rx_gain[0] - (int)openair0_cfg[0].rx_gain_offset[0]) - dB_fixed(ue->frame_parms.ofdm_symbol_size);
LOG_D(PHY, "In %s: [UE %d] slot %d SS-RSRP: %d dBm/RE (%d)\n",
__FUNCTION__,
ue->Mod_id,
slot,
10*log10(ue->measurements.rsrp[gNB_id]) + 30 - ue->rx_total_gain_dB,
ue->measurements.rsrp_dBm[gNB_id],
ue->measurements.rsrp[gNB_id]);
}
// This function computes the received noise power
// Measurement units:
// - psd_awgm (AWGN power spectral density): dBm/Hz
void nr_ue_rrc_measurements(PHY_VARS_NR_UE *ue,
UE_nr_rxtx_proc_t *proc,
uint8_t slot){
uint8_t k;
int aarx, nb_nulls;
int psd_awgm = -174;
int16_t *rxF_sss;
uint8_t k_left = 48;
uint8_t k_right = 183;
uint8_t k_length = 8;
uint8_t l_sss = ue->symbol_offset + 2;
int scs = 15000 * pow(2, (ue->frame_parms.numerology_index));
unsigned int ssb_offset = ue->frame_parms.first_carrier_offset + ue->frame_parms.ssb_start_subcarrier;
double rx_gain = openair0_cfg[0].rx_gain[0];
double rx_gain_offset = openair0_cfg[0].rx_gain_offset[0];
ue->measurements.n0_power_tot = 0;
LOG_D(PHY, "In %s doing measurements for ssb_offset %d l_sss %d \n", __FUNCTION__, ssb_offset, l_sss);
......@@ -322,10 +332,15 @@ void nr_ue_rrc_measurements(PHY_VARS_NR_UE *ue,
ue->measurements.n0_power_tot_dB = (unsigned short) dB_fixed(ue->measurements.n0_power_tot/aarx);
#ifdef DEBUG_MEAS_RRC
int nf_usrp = ue->measurements.n0_power_tot_dB + 30 - ((int)openair0_cfg[0].rx_gain[0] - (int)openair0_cfg[0].rx_gain_offset[0]) - 90 - (-174 + dB_fixed(30000/*scs*/) + dB_fixed(ue->frame_parms.ofdm_symbol_size));
LOG_D(PHY, "In %s slot %d NF USRP %d dBm\n", __FUNCTION__, nf_usrp);
int nf_usrp = ue->measurements.n0_power_tot_dB + 3 + 30 - ((int)rx_gain - (int)rx_gain_offset) - 10 * log10(pow(2, 30)) - (psd_awgm + dB_fixed(scs) + dB_fixed(ue->frame_parms.ofdm_symbol_size));
LOG_D(PHY, "In [%s][slot:%d] NF USRP %d dB\n", __FUNCTION__, slot, nf_usrp);
#endif
LOG_D(PHY, "In %s slot %d Noise Level %d ue->measurements.n0_power_tot_dB %d \n", __FUNCTION__, slot, ue->measurements.n0_power_tot, ue->measurements.n0_power_tot_dB);
LOG_D(PHY, "In [%s][slot:%d] Noise Level %d (digital level %d dB, noise power spectral density %f dBm/RE)\n",
__FUNCTION__,
slot,
ue->measurements.n0_power_tot,
ue->measurements.n0_power_tot_dB,
ue->measurements.n0_power_tot_dB + 30 - 10*log10(pow(2, 30)) - dB_fixed(ue->frame_parms.ofdm_symbol_size) - ((int)rx_gain - (int)rx_gain_offset));
}
......@@ -142,6 +142,7 @@ typedef struct {
uint32_t rsrp[7];
float rsrp_filtered[7]; // after layer 3 filtering
float rsrq_filtered[7];
short rsrp_dBm[7];
// common measurements
//! estimated noise power (linear)
unsigned int n0_power[NB_ANTENNAS_RX];
......
......@@ -2164,10 +2164,10 @@ void nr_ue_prach_procedures(PHY_VARS_NR_UE *ue, UE_nr_rxtx_proc_t *proc, uint8_t
if (ue->mac_enabled == 1) {
int16_t pathloss = get_nr_PL(mod_id, ue->CC_id, gNB_id);
int16_t ra_preamble_rx_power = (int16_t)(10*log10(pow(10, (double)(prach_resources->ra_PREAMBLE_RECEIVED_TARGET_POWER)/10) + pow(10, (double)(pathloss)/10)));
int16_t ra_preamble_rx_power = (int16_t)(prach_resources->ra_PREAMBLE_RECEIVED_TARGET_POWER - pathloss + 30);
ue->tx_power_dBm[nr_slot_tx] = min(nr_get_Pcmax(mod_id), ra_preamble_rx_power);
LOG_I(PHY,"[UE %d][RAPROC][%d.%d]: Generating PRACH Msg1 (preamble %d, PL %d, P0_PRACH %d, TARGET_RECEIVED_POWER %d dBm, RA-RNTI %x)\n",
LOG_I(PHY,"DEBUG [UE %d][RAPROC][%d.%d]: Generating PRACH Msg1 (preamble %d, PL %d dB, P0_PRACH %d, TARGET_RECEIVED_POWER %d dBm, RA-RNTI %x)\n",
mod_id,
frame_tx,
nr_slot_tx,
......
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