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Modified MAP algorithm for extended turbo BCH codes and turbo equalisers

Modified MAP algorithm for extended turbo BCH codes and turbo equalisers
Modified MAP algorithm for extended turbo BCH codes and turbo equalisers
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.
185-189
Liew, T.H.
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Yeap, B.L.
235ca05f-15be-46ae-952f-604b15dbf849
Woodard, J.P.
554fe4b7-5fc5-486b-bd6f-5ec6f93b0067
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Liew, T.H.
a431a389-23f9-4360-9c85-8f4265770636
Yeap, B.L.
235ca05f-15be-46ae-952f-604b15dbf849
Woodard, J.P.
554fe4b7-5fc5-486b-bd6f-5ec6f93b0067
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Liew, T.H., Yeap, B.L., Woodard, J.P. and Hanzo, Lajos (2000) Modified MAP algorithm for extended turbo BCH codes and turbo equalisers. 3G 2000 International Conference on Mobile Communication Technologies, Hilton Metropole Hotel, United Kingdom. 26 - 28 Mar 2000. pp. 185-189 .

Record type: Conference or Workshop Item (Paper)

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.

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More information

Published date: 2000
Venue - Dates: 3G 2000 International Conference on Mobile Communication Technologies, Hilton Metropole Hotel, United Kingdom, 2000-03-26 - 2000-03-28

Identifiers

Local EPrints ID: 256923
URI: http://eprints.soton.ac.uk/id/eprint/256923
PURE UUID: 2aa91a1b-dafb-4700-8aee-39c1c86ebf52
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 03 Dec 2002
Last modified: 23 Sep 2020 01:31

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Contributors

Author: T.H. Liew
Author: B.L. Yeap
Author: J.P. Woodard
Author: Lajos Hanzo ORCID iD

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