[srslte-users] Srsue with USRP N310 for MIMO 2x2

[François Légal]

Hello,


I’m trying to use srsue with a USRP N310 vs an LTE cell in conducted mode. Using RF port 0 and 1 on the same daughter board.
 
-When the cell is configured in SISO, the srsue can attach without any issue.
-When the cell is configured in 2x2 MIMO, srsue cannot attach at all.
Srsue is configured with 2 antennas in ue.conf.
 
Based on the logs, srsue can decode the MIB on the small band of 1920.
Then there is a switch to a wider band of 15360 (for 10 MHz chBW cell), the MIB is not decoded anymore. 
It seems that there is no correlation peak found for PSS this time in this second stage for cell search / CAMPING
Then we are stuck in this SYNC attempt loop.
 
With a USRP B210, the attach works fine in MIMO 2x2
 
The call to srsue is made without specific RF options in the command line. All other options are specified in the ue.conf file.
 
1-Is it a known issue and it there an easy workaround such a using specific RF parameters for USRP ?
2-To which extend srsue (srsran) has been validated in front of a USRP N310 in MIMO 2x2, 4x4 etc.

François


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.srsran.com/pipermail/srsran-users/attachments/20210616/39acdb0b/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: ue.zip
Type: application/zip
Size: 1325174 bytes
Desc: not available
URL: <https://lists.srsran.com/pipermail/srsran-users/attachments/20210616/39acdb0b/attachment.zip>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.srsran.com/pipermail/srsran-users/attachments/20210616/39acdb0b/attachment-0001.htm>