NDLI: On variable length codes for iterative source/channel decoding

Content Provider	IEEE Xplore Digital Library
Author	Bauer, R. Hagenauer, J.
Copyright Year	2001
Description	Author affiliation: Inst. for Commun. Eng., Munich Univ. of Technol., Germany (Bauer, R.)
Abstract	We focus on a trellis-based decoding technique for variable length codes (VLCs) which does not require any additional side information besides the number of bits in the coded sequence. A bit-level soft-in/soft-out decoder based on this trellis is used as an outer component decoder in an iterative decoding scheme for a serially concatenated source/channel coding system. In contrast to previous approaches using this kind of trellis we do not consider the received sequence as a concatenation of variable length codewords, but as one long code word of a (weak) binary channel code which can be soft-in/soft-out decoded. By evaluating the distance properties of selected variable length codes we show that some codes are more suitable for trellis-based decoding than others. Finally we present simulation results which show the performance of the iterative decoding approach.
Sponsorship	Brandeis Univ.
Starting Page	273
Ending Page	282
File Size	527544
Page Count	10
File Format	PDF
ISBN	0769510310
ISSN	10680314
DOI	10.1109/DCC.2001.917158
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-03-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Iterative decoding Redundancy Concatenated codes Robustness Iterative methods Data compression Code standards Binary codes Error correction codes Upper bound
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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