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Journal of Computer Networks and Communications
Volume 2012, Article ID 424037, 10 pages
http://dx.doi.org/10.1155/2012/424037
Research Article

An Investigation of Self-Interference Reduction Strategy in a Spatially Correlated MIMO Channel

Faculty of Engineering and Built Environment, National University of Malaysia, 43600 Bangi, Malaysia

Received 20 May 2011; Accepted 31 October 2011

Academic Editor: Satha K. Sathananthan

Copyright © 2012 Rosdiadee Nordin. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

One of the efficient ways to transmit high data rate is by employing a multiple-input multiple-output (MIMO) transmission. One of the MIMO schemes, known as spatial multiplexing (SM), relies on the linear independence data streams from different transmit antennas to exploit the capacity from the fading channels. Consequently, SM suffers from the effect of spatial correlation which is the limiting factor in achieving the capacity benefit that SM can offer. In an attempt to increase the robustness of the SM transmission in a wide range of correlated channels, the use of dynamic subcarrier allocation (DSA) is investigated. The effective signal-to-interference-and-noise ratio (SINR) metric is used as the performance metric to determine the subcarrier quality which can then be utilised in the allocation. Two novel variants of the subcarrier allocation scheme are proposed. It is shown that the DSA-SINR approach improves the BER performance of SM transmission in highly correlated channels environment.