Modified MAP Algorithm for Extended Turbo BCH Codes and Turbo Equalisers


Liew, T.H., Yeap, B.L., Woodard, J. and Hanzo, L. (2000) Modified MAP Algorithm for Extended Turbo BCH Codes and Turbo Equalisers. In, 3G 2000 International Conference on Mobile Communication Technologies, Hilton Metropole Hotel, London, UK, 27 - 29 Mar 2000. , 185-189.

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Description/Abstract

The Maximum A-Posteriori (MAP) algorithm is modified in order to incorporate the parity check bit of extended BCH codes into calculating the Log Likelihood Ratio (LLR) of the coded bits. The algorithm is then used jointly with channel equalisation – in a scheme referred to as turbo equalisation – in order to mitigate the effects of Inter-Symbol Interference (ISI) introduced by dispersive channels. The performance of the extended BCH codes is evaluated and compared to that of conventional BCH codes. For example, the extended BCH(32,26) code was found to outperform the conventional BCH(31, 26) code by approximately 0.5 – 1.0 dB at a bit error reate (BER) of $10^{-5}$ over dispersive Rayleigh-fading channels.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Event Dates: 27-29 March 2000
Divisions: Faculty of Physical Sciences and Engineering > Electronics and Computer Science > Comms, Signal Processing & Control
Item ID: 258268
Date Deposited: 26 Jan 2004
Last Modified: 14 Aug 2012 01:42
Contributors: Liew, T.H. (Author)
Yeap, B.L. (Author)
Woodard, J. (Author)
Hanzo, L. (Author)
Date: 2000
Additional Information: Event Dates: 27-29 March 2000
Status: Published
Further Information:Google Scholar
ISI Citation Count:0
URI: http://eprints.soton.ac.uk/id/eprint/258268

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