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    A Multi-Antenna Design Scheme based on Hadamard Matrices for Wireless Communications.

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    Anoh BJMCS 2015.pdf (334.8Kb)
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    Publication date
    2015
    Author
    Anoh, Kelvin O.O.
    Chukwu, M.C.
    Dama, Yousef A.S.
    Abd-Alhameed, Raed A.
    Ochonogor, O.
    Jones, Steven M.R.
    Keyword
    QO-STBC, STBC, Hadamard matrix, Null interference, Full diversity, Multiple antennas
    Rights
    © 2015 The Authors. Published by ScienceDomain International. Reproduced in accordance with the publisher's self-archiving policy.
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    A quasi-orthogonal space time block coding (QO-STBC) scheme that exploits Hadamard matrix properties is studied and evaluated. At first, an analytical solution is derived as an extension of some earlier proposed QO-STBC scheme based on Hadamard matrices, called diagonalized Hadamard space-time block coding (DHSBTC). It explores the ability of Hadamard matrices that can translate into amplitude gains for a multi-antenna system, such as the QO-STBC system, to eliminate some off-diagonal (interference) terms that limit the system performance towards full diversity. This property is used in diagonalizing the decoding matrix of the QOSTBC system without such interfering elements. Results obtained quite agree with the analytical solution and also reflect the full diversity advantage of the proposed QO-STBC system design scheme. Secondly, the study is extended over an interference-free QO-STBC multi-antenna scheme, which does not include the interfering terms in the decoding matrix. Then, following the Hadamard matrix property advantages, the gain obtained (for example, in 4x1 QO-STBC scheme) in this study showed 4-times louder amplitude (gain) than the interference-free QOSTBC and much louder than earlier DHSTBC for which the new approach is compared with.
    URI
    http://hdl.handle.net/10454/7888
    Version
    Published version
    Citation
    Anoh KOO, Chukwu MC, Dama YAS, Abd-Alhameed RA, Ochonogor O and Jones SMR (2015) A Multi-Antenna Design Scheme based on Hadamard Matrices for Wireless Communications. British Journal of Mathematics and Computer Science, 5(1): 49-64
    Link to publisher’s version
    http://dx.doi.org/10.9734/BJMCS/2015/12616
    Type
    Article
    Collections
    Engineering and Informatics Publications

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