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The filter which is used to recover the pulse with less ISI is called as

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The filter which is used to recover the pulse with less ISI is called as

(a) Matched filter

(b) Correlator

(c) Matched filter & Correlator

(d) None of the mentioned

The question was posed to me in a job interview.

Question is from Signals and Noises in chapter Baseband Demodulation and Detection of Digital Communications

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The correct answer is (b) Correlator

To explain I would say: The optimum filter used to recover the pulse with best possible signal to noise ratio and less or no ISI is called as correlator or matched filter.

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