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The method using which the error propagation in dubinary signalling can be avoided is

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The method using which the error propagation in dubinary signalling can be avoided is

(a) Filtering

(b) Precoding

(c) Postcoding

(d) None of the mentioned

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This is a very interesting question from Correlative Coding topic in division Formatting and Baseband Modulation of Digital Communications

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Right option is (b) Precoding

The explanation is: In duobinary signalling method if one error occurs it repeats everywhere through out the next steps. To avoid this precoding method can be used.

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