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Which modulation scheme is also called as on-off keying method?

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Which modulation scheme is also called as on-off keying method?

(a) ASK

(b) FSK

(c) PSK

(d) GMSK

I had been asked this question during an interview.

The origin of the question is Digital Bandpass Modulation Techniques topic in section Bandpass Modulation and Detection of Digital Communications

1 Answer

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Best answer
Correct choice is (a) ASK

The best explanation: In ASK modulation scheme the signal attains either maximum amplitude or zero point. Thus it is also called as on-off keying.

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