[srsran-users] How to enable 256QAM on srsUE?

[Tuấn Hoàng Đình]

Hi Andre,

Thanks for your help. It works for me!

Also, I wonder what is the maximum ability of srsRAN when decoding 256QAM
PDSCH packets?
I used pdsch_ue.c to decode PDSCH packets to my phone - Note 20 Ultra when
it was connected to a commercial base station and downloaded a big file
from internet.
However, my observation was that the success rate was quite low on high
mcs_index packets.
More detail, success rate was about 60% on the packets with mcs_index = 15,
but only 25% on packets with mcs_index > 20 (256QAM).
But when kept tracking DCI messages I saw the retransmission rate on the
phone was just 10%. I also located USRP on a position with SNR = 28 dB.
I wonder if it's my fault or the decoding ability of srsRAN.
Did you have any tests on this matter?

Thanks a lot.
Tuan

Vào Th 2, 9 thg 1, 2023 vào lúc 19:15 Andre Puschmann <
andre.puschmann at srs.io> đã viết:

> Hey,
>
> there is no specific config for QAM256. Instead you need to raise the
> RRC release and UL/DL category.
>
> Try those values:
>
>      rrc_release: 13
>      ue_category: 8
>      ue_category_dl: 14
>      ue_category_ul: 5
>
>
> Cheers
> Andre
>
> On 23/12/22 8:51, Tuấn Hoàng Đình wrote:
> > Hi,
> >
> > I wanna enable 256QAM on srsUE when it is connected to srseNB.
> > The current configuration is 64QAM maximum. I tried to look at the
> > ue.conf file but there is no variable to enable 256QAM.
> > Could someone help me to enable 256QAM mode?
> >
> > Thanks a lot.
> > Tuan
> >
> > _______________________________________________
> > srsran-users mailing list
> > srsran-users at lists.srsran.com
> > https://lists.srsran.com/mailman/listinfo/srsran-users
>
> --
> Andre Puschmann
>
> Software Radio Systems (SRS)
> https://www.srs.io
> andre at srs.io
>
> PGP/GnuPG key: 0x204A85DFEA324D58
> fingerprint: 3924 1C60 D52E 81A2 1F2E 0C9D 204A 85DF EA32 4D58
>
>
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