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luis_pereira87
2022-01-21 10:52:39 +00:00
parent 86096894a0
commit 34409bacc0
3 changed files with 7 additions and 3 deletions
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executables/nr-ue.c
+3
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@@ -843,6 +843,9 @@ int computeSamplesShift(PHY_VARS_NR_UE *UE) {
int samples_shift = -(UE->rx_offset>>1); int samples_shift = -(UE->rx_offset>>1);
UE->rx_offset = 0; // reset so that it is not applied falsely in case of SSB being only in every second frame UE->rx_offset = 0; // reset so that it is not applied falsely in case of SSB being only in every second frame
UE->max_pos_fil = 0; // reset IIR filter when sample shift is applied UE->max_pos_fil = 0; // reset IIR filter when sample shift is applied
if (samples_shift != 0) {
LOG_I(NR_PHY,"Adjusting frame in time by %i samples\n", samples_shift);
}
return samples_shift; return samples_shift;
} }
openair1/PHY/NR_UE_TRANSPORT/nr_initial_sync.c
+2 -1
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@@ -247,11 +247,12 @@ int nr_initial_sync(UE_nr_rxtx_proc_t *proc,
LOG_I(PHY,"sync_pos %d ssb_offset %d \n",sync_pos,ue->ssb_offset); LOG_I(PHY,"sync_pos %d ssb_offset %d \n",sync_pos,ue->ssb_offset);
#endif #endif
accumulated_freq_offset += ue->common_vars.freq_offset;
// digital compensation of FFO for SSB symbols // digital compensation of FFO for SSB symbols
if (ue->UE_fo_compensation){ if (ue->UE_fo_compensation){
double s_time = 1/(1.0e3*fp->samples_per_subframe); // sampling time double s_time = 1/(1.0e3*fp->samples_per_subframe); // sampling time
double off_angle = -2*M_PI*s_time*(ue->common_vars.freq_offset); // offset rotation angle compensation per sample double off_angle = -2*M_PI*s_time*(ue->common_vars.freq_offset); // offset rotation angle compensation per sample
accumulated_freq_offset += ue->common_vars.freq_offset;
// In SA we need to perform frequency offset correction until the end of buffer because we need to decode SIB1 // In SA we need to perform frequency offset correction until the end of buffer because we need to decode SIB1
// and we do not know yet in which slot it goes. // and we do not know yet in which slot it goes.
targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band41.fr1.106PRB.usrpb210.conf
+2 -2
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@@ -53,7 +53,7 @@ gNBs =
# downlinkConfigCommon # downlinkConfigCommon
#frequencyInfoDL #frequencyInfoDL
# this is 3600 MHz + 43 PRBs@30kHz SCS (same as initial BWP) # this is 2574.270 MHz + 53 PRBs@30kHz SCS (same as initial BWP)
absoluteFrequencySSB = 518670; absoluteFrequencySSB = 518670;
dl_frequencyBand = 41; dl_frequencyBand = 41;
# this is 3600 MHz # this is 3600 MHz
@@ -66,7 +66,7 @@ gNBs =
dl_carrierBandwidth = 106; dl_carrierBandwidth = 106;
#initialDownlinkBWP #initialDownlinkBWP
#genericParameters #genericParameters
# this is RBstart=27,L=48 (275*(L-1))+RBstart # this is RBstart=0,L=106 (275*(L-1))+RBstart
initialDLBWPlocationAndBandwidth = 28875; # 6366 12925 12956 28875 12952 initialDLBWPlocationAndBandwidth = 28875; # 6366 12925 12956 28875 12952
# subcarrierSpacing # subcarrierSpacing
# 0=kHz15, 1=kHz30, 2=kHz60, 3=kHz120 # 0=kHz15, 1=kHz30, 2=kHz60, 3=kHz120