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A Multi-Antenna Design Scheme based on Hadamard Matrices for Wireless Communications
Anoh, Kelvin O.O. Chukwu, M.C. Dama, Yousef A.S. Ochonogor, O. Jones, Steven M.R.
Anoh, Kelvin O.O.
Chukwu, M.C.
Dama, Yousef A.S.
Ochonogor, O.
Jones, Steven M.R.
Publication Date
2015
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© 2015 The Authors. Published by ScienceDomain International. Reproduced in accordance with the publisher's self-archiving policy.
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Accepted for publication
2014-08-27
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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.
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Citation
Anoh KOO, Chukwu MC, Dama YAS et al (2015) A Multi-Antenna Design Scheme based on Hadamard Matrices for Wireless Communications. British Journal of Mathematics and Computer Science. 5(1): 49-64.
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