[srslte-users] Problems with cell_search with 19.03

[Edward Johnson]

Hi all,
just an update: I've change the UHD driver version ( from 3.15 to 3.9.7)
but it doesn't change anything.
I will try something different.

Regards,
Edward

On Thu, May 30, 2019 at 11:14 AM Edward Johnson <edwjoh97 at gmail.com> wrote:

> Hi guys,
>
> after a while I was able to try the new version of srsLTE, but I found
> some problems with the example program cell_search.c:
> with the previous version (18.12) when I was able to see from 3 to 9 cells
> ( depends on the band), but when I try to perform the same thing with
> 19.03, I receive always the same message: 0 cells found.What you suggest?
> How can debug this issue? Was I wrong with some setups?
> My setup (for both srsLTE version):
> Ubuntu 18.04 (on a VM)
> USRP B210 with GPSDO
> cell_search parameter: -b 20 -a clock=gpsdo -v 1
> In attach, you can find two files with the log of cell_search for when a
> cell has been found by 18.12 and at the same frequency but with 19.03,
> below a brief recap of the final print of cell_search program, in the same
> operational condition (same antenna, same bts, same gpsdo etc etc).
>
> Results with 19.03:
>   Found 0 cells
> Results with 18.12:
>   Found 9 cells
>   Found CELL 795.8 MHz, EARFCN=6198, PHYID=1, 6 PRB, 2 ports, PSS
> power=-11.6 dBm
>   Found CELL 796.0 MHz, EARFCN=6200, PHYID=496, 50 PRB, 2 ports, PSS
> power=-10.3 dBm
>   Found CELL 796.2 MHz, EARFCN=6202, PHYID=1, 100 PRB, 2 ports, PSS
> power=-13.5 dBm
>   Found CELL 806.0 MHz, EARFCN=6300, PHYID=488, 50 PRB, 2 ports, PSS
> power=-23.1 dBm
>   Found CELL 806.2 MHz, EARFCN=6302, PHYID=2, 50 PRB, 2 ports, PSS
> power=-23.4 dBm
>   Found CELL 815.9 MHz, EARFCN=6399, PHYID=482, 25 PRB, 2 ports, PSS
> power=-18.2 dBm
>   Found CELL 816.0 MHz, EARFCN=6400, PHYID=281, 50 PRB, 2 ports, PSS
> power=-13.2 dBm
>   Found CELL 816.2 MHz, EARFCN=6402, PHYID=2, 6 PRB, 1 ports, PSS
> power=-17.0 dBm
>   Found CELL 816.3 MHz, EARFCN=6403, PHYID=236, 50 PRB, 2 ports, PSS
> power=-18.5 dBm
>
> Best regards and thanks in advance,
> Edward
>
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