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Design considerations for iteratively-decoded source-channel coding schemes
University of Kiel. (Institute for Circuits and Systems Theory)ORCID iD: 0000-0001-9307-484X
University of Kiel. (Institute for Circuits and Systems Theory)
2006 (English)In: Proceedings of 44th Allerton Conference on Communications, Control, and Computing, 2006Conference paper, Published paper (Refereed)
Abstract [en]

We address outer variable-length encoding of afirst-order Markov source in a serially concatenated codingscheme with an inner recursive convolutional code. Decodingis carried out iteratively between the constituent decoders forvariable-length and convolutional code. While variable-lengthcodes are commonly known to be sensitive to transmissionerrors, we show that they can lead to significant performanceimprovements compared to fixed-length source encoding withoptimized mappings. Specifically, we propose a simple variablelengthcode construction with a free distance of two and goodcompression properties at the same time. Numerical resultsshow that the performance gain of the proposed approach alsoholds for precoded ISI channels where iterative joint sourcechannel equalization and decoding is employed at the receiver.

Place, publisher, year, edition, pages
2006.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-69996OAI: oai:DiVA.org:kth-69996DiVA: diva2:485698
Conference
44th Allerton Conference on Communications, Control, and Computing. Illinois, USA. September 27–29, 2006
Note
QC 20120531Available from: 2012-01-29 Created: 2012-01-29 Last updated: 2012-05-31Bibliographically approved

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Thobaben, Ragnar

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