NDLI: Joint spatial channel and coupling impedance matrices estimation in compact MIMO systems: The use of adaptive loads

Content Provider	IEEE Xplore Digital Library
Author	Hassan, Y. Wittneben, A.
Copyright Year	2015
Description	Author affiliation: Commun. Technol. Lab., ETH Zurich, Zurich, Switzerland (Hassan, Y.; Wittneben, A.)
Abstract	In this paper we present a novel way of jointly estimating the coupling matrix of closely spaced receive antennas as well as the spatial channel of compact MIMO systems. Unlike conventional approaches, we do not assume any knowledge of the types and geometries of the antennas, or their separations, or having line of sight spatial channels. Our algorithm is based only on changing the load impedances of the antennas and measuring the voltages across such loads. We use the nonlinear relation between the load impedances and the compound channel estimates in order to estimate both the spatial channel and the coupling matrix. Our algorithm is of relevance to future communication systems incorporating heterogeneous networks in dense environments. In such networks different users/nodes may occasionally be closely spaced and hence, mutually coupled. Using our algorithm, they can estimate both the coupling matrix and the spatial channel matrix in real-time and thereby optimize their matching networks and signal processing in order to enhance their performance.
Starting Page	29
Ending Page	33
File Size	229692
Page Count	5
File Format	PDF
e-ISBN	9781467367820
DOI	10.1109/PIMRC.2015.7343263
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-08-30
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Couplings Channel estimation Estimation Receiving antennas Covariance matrices MIMO
Content Type	Text
Resource Type	Article

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