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MIMO Deficiencies Due to Antenna Coupling

Ndujiuba, Charles Uzoanya and Oshin, Oluwadamilola and Nkordeh, Nsikan (2014) MIMO Deficiencies Due to Antenna Coupling. International Journal of Networks and Communications, 5 (1). pp. 10-17. ISSN 2168-4936

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In wireless cellular radiocommunication systems, multiple-input and multiple-output, (MIMO) technology is commonly employed because of the enormous benefits it offers. It is the technique of using multiple antennas at the transmitter to propagate signal through multiple propagation paths to multiple antennas at the receiver. This can be used to significantly increase communication performance, measured by data throughput, and link reliability without additional bandwidth or increased transmit power. It achieves this goal by spreading the same total transmit power over the antennas to achieve an array gain that improves the spectral efficiency, channel capacity and link reliability. These benefits are not without setbacks due to mutual coupling of the antennas, correlation of the signals and the degree of matching between the receiver and the load. In this paper, we discuss radiation pattern of antenna array configuration, mutual coupling between elements of antenna arrays, correlation between the antennas, and their impact on channel capacity. We then formulate general expressions showing the impact, on the capacity of the MIMO channel, by both antenna coupling and spatial correlation due to the propagation environment. We then provide simulation results to illustrate our theoretical analysis.

Item Type: Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering, Science and Mathematics > School of Electronics and Computer Science
Depositing User: Dr. Charles U Ndujiuba
Date Deposited: 16 Feb 2016 15:29
Last Modified: 13 Sep 2018 14:49

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