What is Bandpass sampling? How is it better ?

[kingmakerbull]

Band pass sampling

What is Bandpass sampling?How is it different from ordinary sampling carried out at twice the frequency i.e Nyquist criterion?

Someone pls suggest a good ebook for the basics of DSP

 

[abhikohli]

Band pass sampling

I think, Its wrong to say that
"ordinary sampling carried out at twice the frequency i.e Nyquist criterion?"
In fact, IMHO, bandpass sampling is what comes in Nyquist criterion. B'cos it says twice the freq of bandwidth not twice the absolute freq. To be more clear bandpass sampling means sampling a band limited signal with a sampling freq greater than or equal to the bandwidth of the signal. Though I am not sure how to reconstruct the original signal from this low Fs digital data. (If we feed it directly to DAC, result would be a low freq only) ANYONE... please comment.