DPSK uses coherent form of PSK. A. True B. False This question

dpsk-uses-coherent-form-of-psk-a-true-b-false-this-question

DPSK uses coherent form of PSK.

A. True

B. False

This question was posed to me in semester exam.

The doubt is from Linear Modulation Techniques in division Modulation Techniques for Mobile Radio of Wireless/Mobile

Right choice is B. False

Explanation: Differential phase shift keying uses noncoherent form of phase shift keying. Noncoherent form avoids the need for a coherent reference signal at the receiver. Noncoherent receivers are also easy and cheap to build.