Question

FSK reception uses

(a) Correlation receiver

(b) PLL

(c) Correlation receiver & PLL

(d) None of the mentioned

This question was posed to me in unit test.

My query is from Modulation Techniques topic in chapter Modulation and Coding Trade-off of Digital Communications

Answer 1

Right answer is (c) Correlation receiver & PLL

To explain I would say: Frequency shift keying uses correlation receiver and phase locked loop.