Open Access

Effects of Mutual Coupling and Noise Correlation on Downlink Coordinated Beamforming with Limited Feedback

EURASIP Journal on Advances in Signal Processing20092009:807830

https://doi.org/10.1155/2009/807830

Received: 1 December 2008

Accepted: 22 April 2009

Published: 2 June 2009

Abstract

We consider the impact of receiver correlation, antenna coupling, matching, and noise on the performance of coordinated beamforming systems. We present a new coordinated beamforming technique for two receivers that is suitable for MIMO broadcast channels with signal and noise correlation at the receiver. We then apply this technique to the specific type of signal and noise correlation that occurs in the presence of receiver mutual coupling. Numerical results suggest that, even in the presence of strong coupling, most of the benefits of coordinated beamforming can be preserved by using appropriate matching networks and linear beamforming. Moreover, these benefits can be achieved even when feedback is limited.

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Authors’ Affiliations

(1)
Department of Electrical and Computer Engineering, North Carolina State University

Copyright

© Yuhan Dong et al. 2009

This article is published under license to BioMed Central Ltd. 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.