If I am sampling at Fs, then the observable b/w is Fs/2
in uhd_fft , when I set sampling freq to X MSPS, I see the b/w is also X MHz wide.
What is the catch here ?
Ans : The catch here is complex sampling . The line which you mentioned above is true for real sampling , but for complex sampling you can observe a b/w of Fs when you are sampling at a rate of Fs.
Got it !!! :)
in uhd_fft , when I set sampling freq to X MSPS, I see the b/w is also X MHz wide.
What is the catch here ?
Ans : The catch here is complex sampling . The line which you mentioned above is true for real sampling , but for complex sampling you can observe a b/w of Fs when you are sampling at a rate of Fs.
Got it !!! :)
It doesn't mean in complex sampling that you are violating sampling theorem right?
ReplyDeleteNo No I actually put it wrong... in complex sampling we are using two ADC with half of the speed of the ADC which we use in real sampling. So in effect we are getting the same number of samples for a particular frequency as what is required according to Nyquist rate.
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