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

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

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Official URL: https://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
Subjects: University of Westminster > Science and Technology
SWORD Depositor: repository@westminster.ac.uk
Depositing User: repository@westminster.ac.uk
Date Deposited: 23 Mar 2009 15:03
Last Modified: 30 Jun 2016 11:42
URI: http://westminsterresearch.wmin.ac.uk/id/eprint/6177

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