The University of Southampton
University of Southampton Institutional Repository

Near-capacity irregular variable length coding and irregular unity rate coding

Maunder, R. G. and Hanzo, L. (2009) Near-capacity irregular variable length coding and irregular unity rate coding IEEE Transactions on Wireless Communications, 8, (11), pp. 5500-5507. (doi:10.1109/TWC.2009.070624).

Record type: Article


In this contribution we introduce an EXtrinsic Information Transfer (EXIT) chart matching technique for the design of two serially concatenated irregular codecs, each constituted by a variety of component codes. This approach facilitates a higher degree of design freedom than matching the EXIT function of an irregular codec to that of a regular codec, comprising only a single component code. As a result, a narrow EXIT chart tunnel can be created, facilitating operation at SNR values that are closer to the channel's capacity bound. This is demonstrated for a serial concatenation of iteratively decoded Irregular Variable Length Coding (IrVLC) and Irregular Unity Rate Coding (IrURC), which is favourably compared with an IrVLC and regular Unity Rate Coding (URC) based benchmarker. Finally, we show that the iterative decoding complexity of our IrVLC-IrURC scheme can be reduced by about 25% upon employing a method of jointly performing EXIT chart matching, while seeking a reduced iterative decoding complexity

PDF NCIVLCAIURC.pdf - Version of Record
Download (313kB)

More information

Published date: November 2009
Keywords: variable length coding, VLC, iterative decoding, EXIT chart matching, serial concatenation, joint source and channel coding, trellis, BCJR, soft, irregular coding, free distance, computational complexity, capacity, RVLC, VLEC, reversible variable length coding, variable length error correction coding, URC, unity rate code
Organisations: Faculty of Humanities, Southampton Wireless Group


Local EPrints ID: 264471
PURE UUID: bc09696c-4ec3-4b01-bf0f-d3d33b24e1e5
ORCID for R. G. Maunder: ORCID iD

Catalogue record

Date deposited: 05 Sep 2007
Last modified: 18 Jul 2017 07:35

Export record



Author: R. G. Maunder ORCID iD
Author: L. Hanzo

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.