USRP B210 under and overflow

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Muhammad Bilal Khan 2019-9-11

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https://ww2.mathworks.cn/matlabcentral/answers/479873-usrp-b210-under-and-overflow

编辑： Mir Lodro 2020-10-24

I am using USRP B210 with simulink but when i run my model first time no overflow and underrun comes but after second and third time problem started. How to fix the problem

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fatih özdemir 2020-9-22

did you fix the problem. I am also having underrun on my USRP B200.

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Answer 1

Muhammad Bilal Khan 2020-9-22

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https://ww2.mathworks.cn/matlabcentral/answers/479873-usrp-b210-under-and-overflow#answer_498412

Yes I fix this problem by reducing the sample rate and matching sample rate of Tx and Rx

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fatih özdemir 2020-9-22

I also fixed it on the transmitting-end via burst mode. I do have another problem regarding packet detection( I just see noise and no packets/waveforms). Could you help me with it My mail is ozdemir@posteo.de

I started recently with Matlab's Usrp package

Many thanks!

Muhammad Bilal Khan 2020-9-22

You need to study all the parameters because multiple factors effects your reception.

1- Gain

2- sampling rate

3- overflow

4- underflow

5- Master clock rate

6- interpolation

7-decimation etc

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Answer 2

Mir Lodro 2020-10-24

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https://ww2.mathworks.cn/matlabcentral/answers/479873-usrp-b210-under-and-overflow#answer_523518

编辑：Mir Lodro 2020-10-24

You need to comment out or reduce the number of visualisers in your baseband model. In addition to that you must concentrate on Tx Gain, RX Gain and the AGC gain. Additionally, different USRPs have different Tx and Rx gain ranges.