[srsran-users] 回复: Could not set RX rate to 11.520 MHz. Actual rate is 11.703 MHz

[PABLO PICAZO MARTINEZ]

Dear,

I set 20MHz for 5G with 23.04e6 sampling rate using B210 series. Probably
you could be able to manually modify that sampling rate on srs code, but I
have not gone through that procedure. Could you check the sampling rate
used in rel 20_10? Probably that is multiple of your x410 master clock.

Regards,
Pablo

El mié, 29 may 2024, 12:18, ZHUANG Yufan <yufan.zhuang at connect.ust.hk>
escribió:

> Dear Xavire and Pablo,
>
> Thank you very much for your help.
>
> May I ask how to check the running bandwidth of eNB? I use the default
> configuration file of eNB and PRB=50.
>
> It seems taht the current version of srsran does not use the standard LTE
> rate even if I built with '-DUSE_LTE_RATES=ON'. Then I use release_20_10
> and it works well with my device.
>
> Sincerely,
> Yufan
> ------------------------------
> *发件人:* Xavier Arteaga <xavier.arteaga at srs.io>
> *发送时间:* 2024年5月29日 17:16
> *收件人:* ZHUANG Yufan <yufan.zhuang at connect.ust.hk>
> *抄送:* srsran-users at lists.srsran.com <srsran-users at lists.srsran.com>
> *主题:* Re: [srsran-users] Could not set RX rate to 11.520 MHz. Actual rate
> is 11.703 MHz
>
> Hi Yufan,
> Are you running a 10MHz bandwidth eNb?
>
> My comments:
> - make sure it recompiles after setting `-DUSE_LTE_RATES=ON`;
> - `base_srate=30.72e6` has no effect; and
> - append `master_clock_rate=245.76e6` to the RF device arguments.
>
> Kind regards,
> Xavier
>
> On Wed, 29 May 2024 at 09:49, ZHUANG Yufan <yufan.zhuang at connect.ust.hk>
> wrote:
>
> Dear team,
>
> When I ran srsenb, I encountered the following warning and the srsenb
> cannot start.
>
> [WARNING] [MULTI_USRP] Could not set RX rate to 11.520 MHz. Actual rate is
> 11.703 MHz
> [WARNING] [0/DDC#0] The requested decimation is odd; the user should
> expect passband CIC rolloff.
> Select an even decimation to ensure that a halfband filter is enabled.
> Decimations factorable by 4 will enable 2 halfbands, those factorable by 8
> will enable 3 halfbands.
> decimation = dsp_rate/samp_rate -> 21
>
> I have added "-DUSE_LTE_RATES=ON" when building srsran, and added
> "base_srate=30.72e6" in the enb configuration file. My device is USRP X410.
>
> It seems that my srsenb does not use standard LTE rate. How to set this?
>
> I highly appreciate your help. Looking forward to your reply.
>
> Sincerely,
> Yufan
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