1.

What is the folding frequency for the aliased version of x(n) with sampling rate F?(a) F/D(b) F/4D(c) F/2(d) F/2DI had been asked this question at a job interview.My doubt is from Decimation by a Factor D in portion Multirate Digital Signal Procesing of Digital Signal Processing

Answer»

The CORRECT option is (d) F/2D

To explain I would SAY: We KNOW that if we reduce the sampling rate simply by SELECTING every Dth value of x(n), the SIGNAL will be an aliased version of x(n), with a folding frequency of F/2D.



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