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
November 2001
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), .
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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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
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Date deposited: 08 Jan 2004
Last modified: 18 Mar 2024 02:33
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Contributors
Author:
M.S. Yee
Author:
T.H. Liew
Author:
L. Hanzo
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