Generic Reduced-Complexity MMSE Channel Estimation for OFDM and MC-CDMA
Generic Reduced-Complexity MMSE Channel Estimation for OFDM and MC-CDMA
The performance of a decision-directed channel estimation scheme is analyzed in the context of both OFDM and MC-CDMA systems. A difficulty associated with the employment of the Least Squares (LS) approach to the problem of a posteriori channel estimation in the context of a MC-CDMA system is described and a suitable MMSE-based estimator is proposed instead. It is demonstrated that the computational complexity associated with the MMSE estimation method proposed is relatively high in comparison to that of the conventional LS technique. Thus a low-complexity version of the MMSE estimator is proposed. The MC-CDMA system using a low-complexity MMSE estimator proposed is shown to outperform the corresponding OFDM-based scheme.
528-532
Akhtman, J.
d4fd2b26-c123-463d-847c-80adc83a89fa
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
2005
Akhtman, J.
d4fd2b26-c123-463d-847c-80adc83a89fa
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Akhtman, J. and Hanzo, L.
(2005)
Generic Reduced-Complexity MMSE Channel Estimation for OFDM and MC-CDMA.
2005 IEEE 61st Vehicular Technology Conference, Clarion Hotel, Stockholm, Sweden.
30 May - 01 Jun 2005.
.
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Conference or Workshop Item
(Paper)
Abstract
The performance of a decision-directed channel estimation scheme is analyzed in the context of both OFDM and MC-CDMA systems. A difficulty associated with the employment of the Least Squares (LS) approach to the problem of a posteriori channel estimation in the context of a MC-CDMA system is described and a suitable MMSE-based estimator is proposed instead. It is demonstrated that the computational complexity associated with the MMSE estimation method proposed is relatively high in comparison to that of the conventional LS technique. Thus a low-complexity version of the MMSE estimator is proposed. The MC-CDMA system using a low-complexity MMSE estimator proposed is shown to outperform the corresponding OFDM-based scheme.
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ja-lh-vtc05spring.pdf
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Published date: 2005
Additional Information:
Event Dates: 30 May - 1 June 2005
Venue - Dates:
2005 IEEE 61st Vehicular Technology Conference, Clarion Hotel, Stockholm, Sweden, 2005-05-30 - 2005-06-01
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 260875
URI: http://eprints.soton.ac.uk/id/eprint/260875
PURE UUID: 559ca00b-8841-4cd0-a884-ba1a5fe0d07f
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Date deposited: 16 May 2005
Last modified: 18 Mar 2024 02:33
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Contributors
Author:
J. Akhtman
Author:
L. Hanzo
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