Tauste Campo, Adrià, 1982-Vazquez-Vilar, GonzaloGuillén i Fábregas, A. (Albert)Koch, TobiasMartínez, Alfonso, 1973-2018-12-052018-12-052014Tauste A, Vazquez-Vilar G, Guillén A, Koch T, Martinez A. A Derivation of the source-channel error exponent using nonidentical product distributions. IEEE Trans Inf Theory. 2014;60(6):3209-17. DOI: 10.1109/TIT.2014.23158180018-9448http://hdl.handle.net/10230/36003This 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.application/pdfeng© 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The final published article can be found at http://dx.doi.org/10.1109/TIT.2014.2315818info:eu-repo/semantics/articlehttp://dx.doi.org/10.1109/TIT.2014.2315818Error probabilityChannel codingReliabilityUpper boundProbability distributionJointsinfo:eu-repo/semantics/openAccess