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Trellis coded modulation uses

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Trellis coded modulation uses

(a) Non binary method

(b) Uses redundant bits

(c) No expansion of bandwidth

(d) All of the mentioned

This question was addressed to me in semester exam.

My enquiry is from Trellis Coded Modulation in portion Modulation and Coding Trade-off of Digital Communications

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The correct option is (d) All of the mentioned

Best explanation: Trellis coded modulation is a achieves error performance improvements without expansion of bandwidth. It uses redundant non binary modulation in combination with finite state machines.

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