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Transmission bandwidth depends on

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Transmission bandwidth depends on

(a) Rate of signalling

(b) Density of signal points

(c) Reduced distance

(d) None of the mentioned

This question was addressed to me during an internship interview.

The question is from Trellis Coded Modulation topic in portion Modulation and Coding Trade-off of Digital Communications

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Right option is (a) Rate of signalling

To elaborate: Transmission bandwidth of non orthogonal signalling depends on rate of signalling and not on density of signal points in the constellation.

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