Diversity gain of lattice constellation-based joint orthogonal space-time block coding

Liu, W., Lei, J., Imran, M.-A. and Tang, C. (2015) Diversity gain of lattice constellation-based joint orthogonal space-time block coding. IET Communications, 9(18), pp. 2274-2280. (doi:10.1049/iet-com.2015.0737)

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Abstract

It is generally thought that space-time block codes (STBCs) can obtain no more than full space diversity. In this study, the authors propose a new construction method of joint orthogonal STBCs based on M-dimensional lattice constellations for obtaining space and time diversities simultaneously. By deriving the Chernoff bound of error probability, they prove the exact diversity gain of the proposed code is M times of that in traditional STBCs. This is a valuable scheme as diversity gain is usually the primary factor to determine the ability of anti-fading. Moreover, the maximum-likelihood decoder for the proposed code just requires joint decoding of M real symbols, whose complexity is acceptable as M, usually, needs not to be too big. Numerical results show that the proposed code has remarkable improvement of performance compared with some typical STBCs under the comparable low decoding complexity.

Item Type:Articles
Additional Information:The authors thank the support from the National Natural Science Foundation of China (grant no. 61101098).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Imran, Professor Muhammad
Authors: Liu, W., Lei, J., Imran, M.-A., and Tang, C.
College/School:College of Science and Engineering > School of Engineering
Journal Name:IET Communications
Publisher:Institution of Engineering and Technology
ISSN:1751-8628
ISSN (Online):1751-8636
Published Online:03 December 2015
Copyright Holders:Copyright © 2016 The Institution of Engineering and Technology
First Published:First published in IET Communications 9(18); 2274-2280
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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