Phase-locked loop circuitry is used for(a) Carrier wave recovery(b) Phase estimation(c) Carrier wave recovery & Phase estimation(d) None of the mentionedI got this question in a national level competition.The doubt is from Coherent Detection in chapter Bandpass Modulation and Detection of Digital Communications

Phase-locked loop circuitry is used for(a) Carrier wave recovery(b) Ph

1.	Phase-locked loop circuitry is used for(a) Carrier wave recovery(b) Phase estimation(c) Carrier wave recovery & Phase estimation(d) None of the mentionedI got this question in a national level competition.The doubt is from Coherent Detection in chapter Bandpass Modulation and Detection of Digital Communications
Answer» The correct ANSWER is (C) Carrier wave recovery & Phase estimation Explanation: The phase locked loop circuitry locks on the ARRIVING carrier wave and ESTIMATES its phase.

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