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using n_frames to compute init_sync_frame

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francescomani
2021-04-29 12:02:51 +02:00
parent cc15ac25b9
commit d2f1e41bcb
1 changed files with 5 additions and 4 deletions
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openair1/PHY/NR_UE_TRANSPORT/nr_initial_sync.c
+5 -4
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@@ -308,14 +308,15 @@ int nr_initial_sync(UE_nr_rxtx_proc_t *proc, PHY_VARS_NR_UE *ue, int n_frames)
// every 7*(1<<mu) symbols there is a different prefix length (38.211 5.3.1) // every 7*(1<<mu) symbols there is a different prefix length (38.211 5.3.1)
int n_symb_prefix0 = (ue->symbol_offset/(7*(1<<mu)))+1; int n_symb_prefix0 = (ue->symbol_offset/(7*(1<<mu)))+1;
sync_pos_frame = n_symb_prefix0*(fp->ofdm_symbol_size + fp->nb_prefix_samples0)+(ue->symbol_offset-n_symb_prefix0)*(fp->ofdm_symbol_size + fp->nb_prefix_samples); sync_pos_frame = n_symb_prefix0*(fp->ofdm_symbol_size + fp->nb_prefix_samples0)+(ue->symbol_offset-n_symb_prefix0)*(fp->ofdm_symbol_size + fp->nb_prefix_samples);
// for a correct computation of frame number to sync with the one decoded at MIB we need to take into account in which of the n_frames we got sync
ue->init_sync_frame = n_frames - 1 - is;
// we also need to take into account the shift by samples_per_frame in case the if is true
if (ue->ssb_offset < sync_pos_frame){ if (ue->ssb_offset < sync_pos_frame){
ue->rx_offset = fp->samples_per_frame - sync_pos_frame + ue->ssb_offset; ue->rx_offset = fp->samples_per_frame - sync_pos_frame + ue->ssb_offset;
ue->init_sync_frame = !is + 1; ue->init_sync_frame += 1;
} }
else{ else
ue->rx_offset = ue->ssb_offset - sync_pos_frame; ue->rx_offset = ue->ssb_offset - sync_pos_frame;
ue->init_sync_frame = !is;
}
} }
/* /*