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Which parameter is used in soft decision algorithm?(a) Euclidean distance(b) Euclidean distance squared(c) Euclidean distance & distance squared(d) None of the mentionedI got this question in semester exam.This interesting question is from Properties of Convolution Codes and Reed-Solomon Codes in portion Channel Coding of Digital Communications

Answer»

The correct CHOICE is (c) Euclidean distance & distance squared

For explanation: As soft decision DECODING algorithm has limited resolution it cannot USE hamming distance metric. Instead it USES Euclidean and monotonic metric such as Euclidean distance squared.



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