Problem with RF Capture from USRP N210

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Ehab Salahat 2021-7-4

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https://ww2.mathworks.cn/matlabcentral/answers/871743-problem-with-rf-capture-from-usrp-n210

评论： Sana Rehman 2022-5-10

Hello

I am using matlab example (HERE) to capture I/Q samples. I am experiencing a weird clipping happening to the signal. When I take 10log10(I^2+Q^2), I can see that so many samples are giving me Infinity (becuase I and Q values are zeros), and anything below -45ish dB is clipped. See image below.

Burst mode is enabled so I thought maybe the 0 I/Q values are filled with zeros becuase they could be missed samples, but I believe this shouldn't be the case. Also, even if this was the case, this doesn't explain the clipping effect. The USRP is N210. It has been used with other RF capture softwares and this clipping is not there but the samples drop is present though. In MATLAB, samples data are also buffered in "dsp.SignalSink", as in this example. Not sure if this has anything to do with this clipping.

Did anyone experience anything like this? Anyone knows how to fix this?

Cheers

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Sana Rehman 2022-5-10

Hi , i am trying doing usrp n2920 communication through matab. at the receiver side i am getting messy code rather than the message sent . could you please help me with it .?? i have changes the gain at the receiver side to but the results didnt change

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