Research reveals expurgated error exponents in joint source-channel coding with discrete memoryless sources, indicating the effectiveness of class partitions.
This paper studies expurgated error exponents for joint source-channel coding for discrete memoryless sources and channels. We consider a partition of the source messages into classes, where the codeword distributions depend on the class. We show that two carefully chosen classes suffice to achieve Csiszár's expurgated exponent.
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Moeini et al. (2025) studied this question.
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