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A comparative study on the modified Max-Log-MAP turbo decoding by extrinsic information scaling

Taskaldiran, Mustafa and Morling, Richard C.S. and Kale, Izzet (2007) A comparative study on the modified Max-Log-MAP turbo decoding by extrinsic information scaling. IEEE 5th Annual Wireless Telecommunication Symposium (WTS 2007) . pp. 1-5. ISSN 1934-5070

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Official URL: http://dx.doi.org/10.1109/WTS.2007.4563294

Abstract

A simple but effective technique to improve the performance of the Max-Log-MAP algorithm is to scale the extrinsic information exchanged between two MAP decoders. A comprehensive analysis of the selection of the scaling factors according to channel conditions and decoding iterations is presented in this paper. Choosing a constant scaling factor for all SNRs and iterations is compared with the best scaling factor selection for changing channel conditions and decoding iterations. It is observed that a constant scaling factor for all channel conditions and decoding iterations is the best solution and provides a 0.2-0.4 dB gain over the standard Max- Log-MAP algorithm. Therefore, a constant scaling factor should be chosen for the best compromise.

Item Type:Article
Research Community:University of Westminster > Electronics and Computer Science, School of
ID Code:6177
Deposited On:23 Mar 2009 15:03
Last Modified:11 Aug 2010 15:35

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