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In M-ary FSK as M tends to infinity, probability of error tends to

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In M-ary FSK as M tends to infinity, probability of error tends to

(a) Infinity

(b) Unity

(c) Zero

(d) None of the mentioned

I had been asked this question in a job interview.

The origin of the question is M-ary Modulation and Amplifiers topic in portion Modulation and Coding Trade-off of Digital Communications

1 Answer

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Best answer
The correct answer is (c) Zero

Easy explanation: In M-ary FSK as M tends to infinity, probability of error becomes zero.

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