Question

The detection method where carrier’s phase is given importance is called as

(a) Coherent detection

(b) Non coherent detection

(c) Coherent detection & Non coherent detection

(d) None of the mentioned

This question was addressed to me during a job interview.

The origin of the question is Digital Bandpass Modulation Techniques in chapter Bandpass Modulation and Detection of Digital Communications

Answer 1

Right choice is (a) Coherent detection

The best I can explain: When the receiver uses carrier’s phase as major factor for detection then it is called as coherent detection and when carrier is not given importance it is called as non coherent detection.