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Exploiting High Rate Differential Algebraic STBC in Downlink Multiuser MIMO Systems

Alsifiany, Fahad; Ikhlef, Aissa; Chambers, Jonathon

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Authors

Fahad Alsifiany

Jonathon Chambers



Abstract

This paper considers a multiuser multiple-input multiple-output (MIMO) space-time block coded system that operates at a high data rate with full diversity. In particular, they propose to use a full rate downlink algebraic transmission scheme combined with a differential space-time scheme for multiuser MIMO systems. To achieve this, perfect algebraic space-time codes and Cayley differential transforms are employed. Since channel state information (CSI) is not needed at the differential receiver, differential schemes are ideal for multiuser systems to shift the complexity from the receivers to the transmitter, thus simplifying user equipment. Furthermore, orthogonal spreading matrices are employed at the transmitter to separate the data streams of different users and enable simple single user decoding. In the orthogonal spreading scheme, the transmitter does not require any knowledge of the CSI to separate the data streams of multiple users; this results in a system which does not need CSI at either end. With this system, to limit the number of possible codewords, a sphere decoder is used to decode the signals at the receiving end. The proposed scheme yields low complexity transceivers while providing full rate full diversity with good performance. Simulation results demonstrate the effectiveness of the proposed scheme.

Citation

Alsifiany, F., Ikhlef, A., & Chambers, J. (2018). Exploiting High Rate Differential Algebraic STBC in Downlink Multiuser MIMO Systems. IET Communications, 12(17), 2188-2197. https://doi.org/10.1049/iet-com.2018.5208

Journal Article Type Article
Acceptance Date Jun 6, 2018
Online Publication Date Aug 6, 2018
Publication Date Oct 31, 2018
Deposit Date Jun 13, 2018
Publicly Available Date Jul 24, 2018
Journal IET Communications
Print ISSN 1751-8628
Electronic ISSN 1751-8636
Publisher Institution of Engineering and Technology (IET)
Peer Reviewed Peer Reviewed
Volume 12
Issue 17
Pages 2188-2197
DOI https://doi.org/10.1049/iet-com.2018.5208

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Copyright Statement
This paper is a postprint of a paper submitted to and accepted for publication in
IET communications and is subject to Institution of Engineering and Technology Copyright. The copy of record is
available at the IET Digital Library.


Accepted Journal Article (Complimentary copy of manuscript provided by the IET) (2.7 Mb)
PDF

Copyright Statement
Complimentary copy of manuscript provided by the IET





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