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As limit of k increases, the ratio of PB/PE becomes

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As limit of k increases, the ratio of PB/PE becomes

(a) 1:2

(b) 2:1

(c) 1:3

(d) 3:1

This question was posed to me in final exam.

This key question is from M-ary Signalling and Performance topic in portion Bandpass Modulation and Detection of Digital Communications

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Correct answer is (a) 1:2

The explanation: As the limit of k increases, the ratio of PB/PE becomes 1:2.

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