I need to reduce the sampling rate below the nyquist rate on the zynq 7000 Zedboard with FMCOMMS3-EBZ. Do you know if it is possible to do it? Or do you have any path or articles that talk about it?
I don't think there is much to do on the transceiver side. The AD9361 allows you to independent configure the analog bandwidth and the samplerate, so keep the analog bandwidth above your signals bandwidth and then reduce the samplerate.
You'll then have to implement signal processing to reconstruct the original signal from the compressed data. We do not have ready to use signal processing blocks the implement the reconstruction (how to do it partially depends on the signal of interest). But we do provide support for signal processing environments like MATLAB/Simlink and GNUradio where you could implement your processing algorithm. For more information please refer to the userguide section 5.3.
Can you explain a bit more what you mean by this?
Nyquist rate usually refers to the signal of interest. So if you want to sample below the nyquist rate you can just set the data-output-rate to your desired setting.
According to Nyquist theorem, the sampling frequency of an audio ADC should be at least twice the highest frequency, But I need to sample below the nyquist rate, to omit or discard certain information and use the compressed sensing technique.
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