Digital Communication Questions and Answers, Set 57

Digital Communication Questions and Answers

Q1. 

The TCM decoder uses

Answer :   

Maximum likelihood detector

Q2. 

Which modulation is selected for power limited system?

Answer :  

MFSK

Q3. 

In polarization division technique ______ polarization is used.

Answer :   

Orthogonal

Q4. 

The orbital period of communication satellites is _______ as that of earth’s rotational period.

Answer :  

Same

Q5. 

The bandwidth efficiency of QFSK is _______ that of BFSK.

Answer :  

Equal to

Q6.

Which modulation requires more bandwidth?

Answer :   

BPSK

Q7. 

QPSK amplitude modulates

Answer :  

Sine & Cosine function

Q8. 

A cycle slip occurs when the magnitude of the original phase error exceeds

Answer :   

2π radians

Q9. 

What is the function of the edge detector?

Answer :   

Differentiation & Rectification

Q10. 

Coherent modulation requires ____ level of synchronization.

Answer :  

Three

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