NDLI: Uncoupled Impedance Matching for Capacity Maximization of Compact MIMO Arrays

Content Provider	IEEE Xplore Digital Library
Author	Wen Fong Tsen Hsueh-Jyh Li
Copyright Year	2002
Abstract	We extend the study of Fei (IEEE Transactions on Antennas and Propagation, vol. 56, no. 11, pp. 35663575, Nov. 2008) on single-port matching impedance for capacity maximization in compact 2 × 2 multiple-input-multiple-output (MIMO) systems to N × N MIMO systems. In addition, we increase the degrees of freedom of the uncoupled matching where each port is terminated by an arbitrary load impedance. By maximizing an upper bound of the ergodic capacity for a N × N MIMO system with coupling at the receivers in high signal-to-noise ratio (SNR) scheme, a set of equations is formulated to find the optimized load impedance matrix. Input impedance match is proved to be an optimum solution when the MIMO system operates in high SNR scenarios. For three-element arrays, we show numerically that a significant performance improvement can be achieved by introducing input impedance matching. Observations suggest that the achieved improvement varies with array geometry, antenna spacing, and SNR.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	1295
Ending Page	1298
Page Count	4
File Size	456072
File Format	PDF
ISSN	15361225
Volume Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Impedance matching MIMO Covariance matrix Receiving antennas Transmitting antennas AWGN Matrix decomposition Signal to noise ratio Antenna arrays Mutual coupling mutual coupling multiple-input–multiple-output (MIMO)
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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