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The bandwidth efficiency of QFSK is _______ that of BFSK.

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The bandwidth efficiency of QFSK is _______ that of BFSK.

(a) Greater than

(b) Less than

(c) Equal to

(d) None of the mentioned

This question was addressed to me by my college director while I was bunking the class.

Question is from Bandwidth Efficiency Plane and Bandwidth Efficient Modulation in chapter Modulation and Coding Trade-off of Digital Communications

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Right choice is (c) Equal to

The explanation: The bandwidth efficiency of QPSK is equal to that of the BFSK.

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