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UE: N_TA_offset configuration depending on SCS and N_RB_DL

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cig
2020-03-26 18:54:57 +01:00
parent 04a9c72de3
commit 3bb82a02ee
1 changed files with 41 additions and 7 deletions
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executables/nr-uesoftmodem.c
+41 -7
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@@ -759,15 +759,49 @@ int main( int argc, char **argv ) {
UE[CC_id]->rx_total_gain_dB = (int)rx_gain[CC_id][0] + rx_gain_off;
UE[CC_id]->tx_power_max_dBm = tx_max_power[CC_id];
if (frame_parms[CC_id]->frame_type==FDD) {
if (UE[CC_id]->frame_parms.frame_type == FDD) {
UE[CC_id]->N_TA_offset = 0;
} else {
if (frame_parms[CC_id]->N_RB_DL == 100)
UE[CC_id]->N_TA_offset = 624;
else if (frame_parms[CC_id]->N_RB_DL == 50)
UE[CC_id]->N_TA_offset = 624/2;
else if (frame_parms[CC_id]->N_RB_DL == 25)
UE[CC_id]->N_TA_offset = 624/4;
int N_RB = UE[CC_id]->frame_parms.N_RB_DL;
int N_TA_offset = UE[CC_id]->frame_parms.ul_CarrierFreq < 6e9 ? 400 : 431; // reference samples for 25600Tc @ 30.72 Ms/s for FR1, same @ 61.44 Ms/s for FR2
double factor=1;
switch (UE[CC_id]->frame_parms.numerology_index) {
case 0: //15 kHz scs
AssertFatal(N_TA_offset == 400, "scs_common 15kHz only for FR1\n");
if (N_RB <= 25) factor = .25; // 7.68 Ms/s
else if (N_RB <=50) factor = .5; // 15.36 Ms/s
else if (N_RB <=75) factor = 1.0; // 30.72 Ms/s
else if (N_RB <=100) factor = 1.0; // 30.72 Ms/s
else AssertFatal(1==0,"Too many PRBS for mu=0\n");
break;
case 1: //30 kHz sc
AssertFatal(N_TA_offset == 400, "scs_common 30kHz only for FR1\n");
if (N_RB <= 106) factor = 2.0; // 61.44 Ms/s
else if (N_RB <= 275) factor = 4.0; // 122.88 Ms/s
break;
case 2: //60 kHz scs
AssertFatal(1==0,"scs_common should not be 60 kHz\n");
break;
case 3: //120 kHz scs
AssertFatal(N_TA_offset == 431, "scs_common 120kHz only for FR2\n");
break;
case 4: //240 kHz scs
AssertFatal(1==0,"scs_common should not be 60 kHz\n");
if (N_RB <= 32) factor = 1.0; // 61.44 Ms/s
else if (N_RB <= 66) factor = 2.0; // 122.88 Ms/s
else AssertFatal(1==0,"N_RB %d is too big for curretn FR2 implementation\n",N_RB);
break;
if (N_RB == 100)
UE[CC_id]->N_TA_offset = 624;
else if (N_RB == 50)
UE[CC_id]->N_TA_offset = 624/2;
else if (N_RB == 25)
UE[CC_id]->N_TA_offset = 624/4;
}
if (UE[CC_id]->frame_parms.threequarter_fs == 1) factor = factor*.75;
UE[CC_id]->N_TA_offset = (int)(N_TA_offset * factor);
LOG_I(PHY,"UE %d Setting N_TA_offset to %d samples (factor %f, UL Freq %d, N_RB %d)\n", UE[CC_id]->Mod_id, UE[CC_id]->N_TA_offset, factor, UE[CC_id]->frame_parms.ul_CarrierFreq, N_RB);
}
}