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USRP Software Radio

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how do i demodulate correctly?

Hello everyone,

 

I am doing an ASK modulation on a sequence of bits and it works, I can see it on my oscilloscope. But now I am trying to do the RX part also. So I am using my USRP device for both Tx and Rx. But I cannot seem to catch only the sequence I'm interested in. How can I do that? And also even when I'm not transmitting, the USRP receives some kind of signal and it demodulates it also. How can I fix this?

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Below I have attached a link to our forums that have some great modulation examples if you would like to compare your work.

 

https://decibel.ni.com/content/groups/ni-usrp-example-labview-vis

 

The other thing I would recommend doing would be to remove the acquisition portion of your code (the USRP) part and see if you can use the demodulation VIs on the acquired signal. This would help us determine if anything is missing in the code.

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