Power allocation for beamforming relay networks under channel uncertainties

Authors:
Jingon Joung;Ali H. Sayed
Affiliations:
Department of Electrical Engineering, University of California Los Angeles, CA;Department of Electrical Engineering, University of California Los Angeles, CA
Venue:
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Year:
2009

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Abstract

Under uncertain channel conditions, local and global power control factors for amplify-and-forward relay processing and source-destination beamforming are jointly and iteratively designed based on a minimum mean-square-error (MMSE) criterion. The influence of imperfect channel information on system performance is examined by computer simulation. As a result, it is verified that the proposed power control methods can relieve the performance degradation arising from channel uncertainties.