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Design of power- and bandwidth-efficient turbo-coded modulation schemes using constellation shaping

Lookup NU author(s): Dr Stephane Le Goff, Professor Bayan Sharif, Professor Harris Tsimenidis


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The paper presents a novel and simple technique for improving the error performance of bandwidth-efficient bit-interleaved turbo-coded modulation (BITCM) schemes. This method consists of using a shaping block code placed between the modulation and turbo coding functions in order to achieve constellation shaping. By considering the example of a 3 bit/dim BITCM system based on 16-ary pulse-amplitude modulation, the achievable shaping gain is evaluated using the concept of mutual information, and, in a detailed manner, some important design issues such as the search for good shaping codes are addressed. It is finally shown that, for typical BITCM systems, this technique offers error performance improvements approximately equal to 0.6 dB while adding little complexity to the system.

Publication metadata

Author(s): Le Goff SY, Khoo BK, Sharif BS, Tsimenidis CC

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: IEE Proceedings: Communications

Year of Conference: 2005

Pages: 1125-1133

ISSN: 1350-2425

Publisher: IEEE


DOI: 10.1049/ip-com:20050200

Library holdings: Search Newcastle University Library for this item

ISBN: 17518636