Coded Modulation Assisted Radial Basis Function Aided Turbo Equalisation for Dispersive Rayleigh Fading Channels
Coded Modulation Assisted Radial Basis Function Aided Turbo Equalisation for Dispersive Rayleigh Fading Channels
In this contribution a range of Coded Modulation (CM) assisted Radial Basis Function (RBF) based Turbo Equalisation (TEQ) schemes are investigated when communicating over dispersive Rayleigh fading channels. Specifically, 16QAM based Trellis Coded Modulation (TCM), Turbo TCM (TTCM), Bit-Interleaved Coded Modulation (BICM) and iteratively decoded BICM (BICM-ID) are evaluated in the context of an RBF based TEQ scheme and a reduced-complexity RBF based In-phase/Quadrature-phase (I/Q) TEQ scheme. The Least Mean Square (LMS) algorithm was employed for channel estimation, where the initial estimation step-size used was 0.05, which was reduced to 0.01 for the second and the subsequent TEQ iterations. The achievable coding gain of the various CM schemes was significantly increased, when employing the proposed RBF-TEQ or RBF-I/Q-TEQ rather than the conventional non-iterative Decision Feedback Equaliser - (DFE). Explicitly, the reduced-complexity RBF-I/Q-TEQ-CM achieved a similar performance to the full-complexity RBF-TEQ-CM, while attaining a significant complexity reduction. The best overall performer was the RBF-I/Q-TEQ-TTCM scheme, requiring only 1.88~dB higher SNR at BER=10-5, than the identical throughput 3~BPS uncoded 8PSK scheme communicating over an AWGN channel. The coding gain of the scheme was 16.78-dB.
RBF, I/Q, TEQ, CM, TCM, TTCM, BICM, BICM-ID
2198-2206
Ng, S. X.
e19a63b0-0f12-4591-ab5f-554820d5f78c
Yee, M. S.
8d21140e-9078-4962-8858-ffc954051352
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
November 2004
Ng, S. X.
e19a63b0-0f12-4591-ab5f-554820d5f78c
Yee, M. S.
8d21140e-9078-4962-8858-ffc954051352
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Ng, S. X., Yee, M. S. and Hanzo, L.
(2004)
Coded Modulation Assisted Radial Basis Function Aided Turbo Equalisation for Dispersive Rayleigh Fading Channels.
IEEE Transactions on Wireless Communications, 3 (6), .
Abstract
In this contribution a range of Coded Modulation (CM) assisted Radial Basis Function (RBF) based Turbo Equalisation (TEQ) schemes are investigated when communicating over dispersive Rayleigh fading channels. Specifically, 16QAM based Trellis Coded Modulation (TCM), Turbo TCM (TTCM), Bit-Interleaved Coded Modulation (BICM) and iteratively decoded BICM (BICM-ID) are evaluated in the context of an RBF based TEQ scheme and a reduced-complexity RBF based In-phase/Quadrature-phase (I/Q) TEQ scheme. The Least Mean Square (LMS) algorithm was employed for channel estimation, where the initial estimation step-size used was 0.05, which was reduced to 0.01 for the second and the subsequent TEQ iterations. The achievable coding gain of the various CM schemes was significantly increased, when employing the proposed RBF-TEQ or RBF-I/Q-TEQ rather than the conventional non-iterative Decision Feedback Equaliser - (DFE). Explicitly, the reduced-complexity RBF-I/Q-TEQ-CM achieved a similar performance to the full-complexity RBF-TEQ-CM, while attaining a significant complexity reduction. The best overall performer was the RBF-I/Q-TEQ-TTCM scheme, requiring only 1.88~dB higher SNR at BER=10-5, than the identical throughput 3~BPS uncoded 8PSK scheme communicating over an AWGN channel. The coding gain of the scheme was 16.78-dB.
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Published date: November 2004
Keywords:
RBF, I/Q, TEQ, CM, TCM, TTCM, BICM, BICM-ID
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 261596
URI: http://eprints.soton.ac.uk/id/eprint/261596
PURE UUID: d7ec9968-b722-4f49-88d7-08be0c067188
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Date deposited: 25 Nov 2005
Last modified: 18 Mar 2024 02:48
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Contributors
Author:
S. X. Ng
Author:
M. S. Yee
Author:
L. Hanzo
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