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Matched filter is used for

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Matched filter is used for

(a) Coherent detection

(b) Non coherent detection

(c) Coherent & Non coherent detection

(d) None of the mentioned

The question was asked by my college director while I was bunking the class.

This key question is from Coherent Detection topic in section Bandpass Modulation and Detection of Digital Communications

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The correct option is (a) Coherent detection

To explain I would say: Matched filter is used for coherent detection. It cannot be used for non coherent detection because matched filter output is a function of unknown angle α.

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