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

[ZHUANG Yufan]

Hi Xavier,

Thank you a lot for your advice.

But I am sorry that the warning "Could not set RX rate to 11.520 MHz. Actual rate is 11.703 MHz" still exists after I recompile srsRAN_4G with the CMake argument "-DUSE_LTE_RATES=ON". I even delete the build directory and make build directory again and cmake again but it dosen't make a difference.

May I ask if it is because I do not recompile srsRAN_4G correctly? If so, how should I recompile?

Thank you for your help!

Sincerely,
Yufan



________________________________
发件人: Xavier Arteaga <xavier.arteaga at srs.io>
发送时间: 2024年3月9日 0:33
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] eNB Warning - Could not set RX rate to 11.520 MHz. Actual rate is 11.703 MHz.

Hi Yufan,

The USRP you are using cannot derive 11.52MHz from 245.76MHz.

The standard DFT size and sampling rate are 1024 and 15.36MHz. However, the DFT size is reduced to 768 which implies a sampling rate of 11.52MHz to save some bandwidth by default. It is likely your device supports a 15.36MHz sampling rate.

You can force the enb to use the standard symbol size by recompiling srsRAN_4G with the CMake argument -DUSE_LTE_RATES=On.

Kind regards,
Xavier


On Fri, 8 Mar 2024 at 12:33, ZHUANG Yufan <yufan.zhuang at connect.ust.hk<mailto:yufan.zhuang at connect.ust.hk>> wrote:
Dear team,

There is a warning when I run eNB:

Could not set RX rate to 11.520 MHz. Actual rate is 11.703 MHz

Could you please tell me how to fix it?

Attached is eNB log and the log after run "uhd_usrp_probe".

Radio head: USRP X410
OS: Ubuntu 20.04
UHD v4.5.0.0

Thank you for your help.

Sincerely,
Yufan
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