[srslte-users] MIMO and srsUE

[Andrés García Saavedra]

Hi,

Yes, sorry forgot to mention, yes, we did set nof_rx_antennas=2 in the
ue.conf.

Andres

On Thu, Oct 19, 2017 at 3:21 PM, Ismael Gomez <
ismael.gomez at softwareradiosystems.com> wrote:

> Hi Andres,
>
> Have you set nof_rx_antennas=2 in the ue.conf?
>
> On Thu, 19 Oct 2017 at 16:51 Andrés García Saavedra <
> andres.garcia.saavedra at gmail.com> wrote:
>
>> Hi all,
>>
>> We are trying to test the 2x2 MIMO setup of srsUE and we are having
>> issues.
>>
>> We are using the latest code from the git repository (up to today). We
>> are using an USRP b210 for srsUE and a commercial LTE base station from
>> spidercloud Wireless. We are using plain air in band 7 (which we have a
>> licensed for).
>>
>> If we plug in 2 antennas on one RF Chain A of the USRP the attachment
>> works well and we achieve around 70Mb/s of downlink throughput as expected
>> for a SISO setup. UE log can be found here
>> <https://www.dropbox.com/s/xttw1s8wg4pkg7l/ue-1RX%20antenna.log?dl=0>
>> (there is an error notifying that TM 3 is not supported by the UE which is
>> expected as we dont have antennas on the RF chain B).
>>
>> If we now add 2 more antennas to RF Chain B and repeat the process we
>> have plenty of "Sync error. Sending out-of-sync to RRC" messages and
>> therefore the attachment procedure fails, as shown in the ue.log file
>> here
>> <https://www.dropbox.com/s/d7xutmasglirk22/ue-2RX%20antenna.log?dl=0>.
>>
>> Somebody has experienced a similar problem or have some suggestion?
>>
>> Thanks!
>> Andres
>> _______________________________________________
>> srslte-users mailing list
>> srslte-users at lists.softwareradiosystems.com
>> http://www.softwareradiosystems.com/mailman/listinfo/srslte-users
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.srsran.com/pipermail/srsran-users/attachments/20171019/df3d1174/attachment.htm>