A Derivation of the Source-Channel Error Exponent Using Nonidentical Product Distributions

作者:Tauste Campo Adria; Vazquez Vilar Gonzalo; Guillen i Fabregas Albert; Koch Tobias; Martinez Alfonso
来源:IEEE Transactions on Information Theory, 2014, 60(6): 3209-3217.
DOI:10.1109/TIT.2014.2315818

摘要

This paper studies the random-coding exponent of joint source-channel coding for a scheme where source messages are assigned to disjoint subsets (referred to as classes), and codewords are independently generated according to a distribution that depends on the class index of the source message. For discrete memoryless systems, two optimally chosen classes and product distributions are found to be sufficient to attain the sphere-packing exponent in those cases where it is tight.

  • 出版日期2014-6