[srslte-users] Failed to synchronize on a full cell bandwidth using N310

[Anthony B.]

Hello all,

I meet some issues when trying to attach to a cell using a USRP N310.
The PSS/SSS synchronization goes well and I'm able to decode the MIB on the
1.92 MHz band.
However when it goes to the real cell bandwidth, it doesn't succeed the PSS
synchronization.
By setting the logs to DEBUG, I can see that the PSS peak correlation never
goes beyond the threshold to trigger SSS correlation after 100 tries.

08:20:56.261309 [PHY0] [D] [ 1275]  PSS: id=0, peak_pos=7710,
peak_value=1.122404
08:20:56.261318 [PHY0] [D] [ 1275]  SYNC ret=0 N_id_2=0 find_offset=0
frame_len=15360, pos=7710 peak=1.12 threshold=3.00 CFO=-0.695 kHz
08:20:56.261324 [PHY0] [I] [ 1275]  SYNC FIND: sf_idx=0, ret=0,
peak_pos=7710, peak_value=1.12, mean_cp_cfo=-0.05, mean_pss_cfo=0.00,
total_cfo_khz=-0.7
08:20:56.261327 [PHY0] [I] [ 1275] SYNC:  Waiting for PSS while trying to
decode MIB (99/100)
08:20:56.261333 [PHY0] [D] [ 1275] SYNC:  state=SYNC, tti=1276
08:20:56.261338 [PHY0] [D] [ 1276] Discarding 15360 samples
08:20:56.261373 [PHY0] [I] [ 1276] Cell Select: Could not synchronize SFN

I don't meet this issue on a B210 in the same conditions (it fully decodes
the cell channels), so I was wondering what would be wrong in my N310
setup.
I am using a 1 Gbps link on the SFP0 and TX/RX on the channel 0.

Do you have suggestions on what may be wrong ?

Thanks,
Anthony
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.srsran.com/pipermail/srsran-users/attachments/20210414/2407ffd9/attachment.htm>