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fixing nr_pbchsim

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This commit is contained in:
Florian Kaltenberger
2019-06-19 22:15:56 +02:00
parent a16829e955
commit ea20869372
3 changed files with 12 additions and 11 deletions
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openair1/PHY/NR_UE_TRANSPORT/nr_pbch.c
+7 -7
View File
@@ -566,8 +566,8 @@ int nr_rx_pbch( PHY_VARS_NR_UE *ue,
}
uint32_t payload = 0;
uint8_t xtra_byte = 0;
xtra_byte = (out>>24)&0xff;
//uint8_t xtra_byte = 0;
nr_ue_pbch_vars->xtra_byte = (out>>24)&0xff;
for (int i=0; i<NR_POLAR_PBCH_PAYLOAD_BITS; i++)
payload |= ((out>>i)&1)<<(NR_POLAR_PBCH_PAYLOAD_BITS-i-1);
@@ -575,18 +575,18 @@ int nr_rx_pbch( PHY_VARS_NR_UE *ue,
for (int i=0; i<3; i++)
decoded_output[i] = (uint8_t)((payload>>((3-i)<<3))&0xff);
n_hf = ((xtra_byte>>4)&0x01); // computing the half frame index from the extra byte
n_hf = ((nr_ue_pbch_vars->xtra_byte>>4)&0x01); // computing the half frame index from the extra byte
ssb_index = i_ssb; // ssb index corresponds to i_ssb for Lmax = 4,8
if (Lmax == 64) { // for Lmax = 64 ssb index 4th,5th and 6th bits are in extra byte
for (int i=0; i<3; i++)
ssb_index += (((xtra_byte>>(7-i))&0x01)<<(3+i));
ssb_index += (((nr_ue_pbch_vars->xtra_byte>>(7-i))&0x01)<<(3+i));
}
ue->symbol_offset = nr_get_ssb_start_symbol(frame_parms, ssb_index, n_hf);
#ifdef DEBUG_PBCH
printf("xtra_byte %x payload %x\n", xtra_byte, payload);
printf("xtra_byte %x payload %x\n", nr_ue_pbch_vars->xtra_byte, payload);
for (int i=0; i<(NR_POLAR_PBCH_PAYLOAD_BITS>>3); i++) {
// printf("unscrambling pbch_a[%d] = %x \n", i,pbch_a[i]);
@@ -604,8 +604,8 @@ int nr_rx_pbch( PHY_VARS_NR_UE *ue,
dl_indication.cc_id=proc->CC_id;
rx_ind.rx_indication_body[0].pdu_type = FAPI_NR_RX_PDU_TYPE_MIB;
rx_ind.rx_indication_body[0].mib_pdu.pdu = &decoded_output[0];
rx_ind.rx_indication_body[0].mib_pdu.additional_bits = xtra_byte;
rx_ind.rx_indication_body[0].mib_pdu.pdu = &decoded_output[0]; //not good as it is pointing to a memory that can change
rx_ind.rx_indication_body[0].mib_pdu.additional_bits = nr_ue_pbch_vars->xtra_byte;
rx_ind.rx_indication_body[0].mib_pdu.ssb_index = i_ssb; // confirm with TCL
rx_ind.rx_indication_body[0].mib_pdu.ssb_length = Lmax; // confirm with TCL
rx_ind.rx_indication_body[0].mib_pdu.cell_id = frame_parms->Nid_cell; // confirm with TCL
openair1/PHY/defs_nr_UE.h
+2
View File
@@ -817,6 +817,8 @@ typedef struct {
/// \brief Pointer to PBCH decoded output.
/// - first index: ? [0..63] (hard coded)
uint8_t *decoded_output;
/// \brief PBCH additional bits
uint8_t xtra_byte;
/// \brief Total number of PDU errors.
uint32_t pdu_errors;
/// \brief Total number of PDU errors 128 frames ago.
openair1/SIMULATION/NR_PHY/pbchsim.c
+3 -4
View File
@@ -637,10 +637,10 @@ int main(int argc, char **argv)
uint8_t gNB_xtra_byte=0;
for (int i=0; i<8; i++)
gNB_xtra_byte |= ((gNB->pbch.pbch_a>>(31-i))&1)<<(7-i);
payload_ret = (UE->rx_ind.rx_indication_body->mib_pdu.additional_bits == gNB_xtra_byte);
payload_ret = (UE->pbch_vars[0]->xtra_byte == gNB_xtra_byte);
for (i=0;i<3;i++){
payload_ret += (UE->rx_ind.rx_indication_body->mib_pdu.pdu[i] == gNB->pbch_pdu[2-i]);
payload_ret += (UE->pbch_vars[0]->decoded_output[i] == gNB->pbch_pdu[2-i]);
//printf("pdu byte %d gNB: 0x%02x UE: 0x%02x\n",i,gNB->pbch_pdu[i], UE->rx_ind.rx_indication_body->mib_pdu.pdu[i]);
}
//printf("xtra byte gNB: 0x%02x UE: 0x%02x\n",gNB_xtra_byte, UE->rx_ind.rx_indication_body->mib_pdu.additional_bits);
@@ -656,7 +656,6 @@ int main(int argc, char **argv)
if (((float)n_errors/(float)n_trials <= target_error_rate) && (n_errors_payload==0)) {
printf("PBCH test OK\n");
printf("Synchronization obtained for i_ssb = %d\n",UE->rx_ind.rx_indication_body[0].mib_pdu.ssb_index);
break;
}