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

[img]
Preview
PDF
wts2007MTaskaldiran.pdf

Download (192kB)
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
Subjects: University of Westminster > Science and Technology > Electronics and Computer Science, School of (No longer in use)
Depositing User: Mustafa Taskaldiran
Date Deposited: 23 Mar 2009 15:03
Last Modified: 11 Aug 2010 14:35
URI: http://westminsterresearch.wmin.ac.uk/id/eprint/6177

Actions (login required)

Edit Item (Repository staff only) Edit Item (Repository staff only)

Downloads