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Burst-by-Burst Adaptive Turbo-Coded Radial Basis Function-Assisted Decision Feedback Equalization

Burst-by-Burst Adaptive Turbo-Coded Radial Basis Function-Assisted Decision Feedback Equalization
Burst-by-Burst Adaptive Turbo-Coded Radial Basis Function-Assisted Decision Feedback Equalization
The performance of the proposed radial basis function (RBF) assisted turbo-coded adaptive modulation scheme is characterized in a wideband channel scenario. We commence by introducing the novel concept of the Jacobian RBF equalizer, which is a reduced-complexity version of the conventional RBF equalizer. Specifically, the Jacobian logarithmic RBF equalizer generates its output in the logarithmic domain and hence it can be used to provide soft outputs for the turbo-channel decoder. We propose using the average magnitude of the log-likelihood ratio (LLR) of the bits in the received transmission burst before channel decoding as the channel quality measure for controlling the mode-switching regime of our adaptive scheme.
Adaptive modulation, AQAM, decision feedback equalizer, DFE, Jacobian logarithm, neural network, radial basis function, RBF, turbo coding
1935-1945
Yee, M.S.
cc253102-2741-4359-9806-3f919e717b51
Liew, T.H.
a431a389-23f9-4360-9c85-8f4265770636
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Yee, M.S.
cc253102-2741-4359-9806-3f919e717b51
Liew, T.H.
a431a389-23f9-4360-9c85-8f4265770636
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Yee, M.S., Liew, T.H. and Hanzo, L. (2001) Burst-by-Burst Adaptive Turbo-Coded Radial Basis Function-Assisted Decision Feedback Equalization. IEEE Transactions on Communications, 49 (11), 1935-1945.

Record type: Article

Abstract

The performance of the proposed radial basis function (RBF) assisted turbo-coded adaptive modulation scheme is characterized in a wideband channel scenario. We commence by introducing the novel concept of the Jacobian RBF equalizer, which is a reduced-complexity version of the conventional RBF equalizer. Specifically, the Jacobian logarithmic RBF equalizer generates its output in the logarithmic domain and hence it can be used to provide soft outputs for the turbo-channel decoder. We propose using the average magnitude of the log-likelihood ratio (LLR) of the bits in the received transmission burst before channel decoding as the channel quality measure for controlling the mode-switching regime of our adaptive scheme.

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More information

Published date: November 2001
Keywords: Adaptive modulation, AQAM, decision feedback equalizer, DFE, Jacobian logarithm, neural network, radial basis function, RBF, turbo coding
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 256186
URI: http://eprints.soton.ac.uk/id/eprint/256186
PURE UUID: e5297db1-ce36-4480-b691-84c73c06f97a
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 08 Jan 2004
Last modified: 03 Dec 2019 02:06

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