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Journal of Electrical and Computer Engineering
Volume 2013, Article ID 123827, 8 pages
Research Article

Evaluation of Cover and Reflector in Receiver Antennas for SM-MIMO Wireless Communications

1Department of Electrical and Electronic Engineering, Kitami Institute of Technology, 165, Koen-cho, Kitami, Hokkaido 090-8507, Japan
2Graduate School of Information Science and Technology, Hokkaido University, Kita-14 Nishi-9, Kita-ku, Sapporo, Hokkaido 060-0814, Japan

Received 22 August 2013; Revised 28 October 2013; Accepted 1 November 2013

Academic Editor: George Tsoulos

Copyright © 2013 Shingo Yoshizawa and Yoshikazu Miyanaga. 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.


Spatial multiplexing multiple-input multiple-output (SM-MIMO) is effective in increasing communication throughput. However, performance degradation occurs in poor multipath and line-of-sight (LOS) channels due to the high spatial correlation. This paper presents the evaluation of cover and reflector in receiver antennas to overcome the performance degradation in MIMO LOS channels. We measured the characteristics of packet error rate (PER), signal-to-noise ratio (SNR), spatial correlation coefficient, and received power ratio in farm, groove, passage, and corner environments. The farm environment degraded communication performance due to the high spatial correlation coefficient. Following the measurement results, we fabricated cover and reflector in receiver antennas to decrease the high spatial correlation and confirmed the improvement of communication performance.