NDLI: Optimization of MIMO Relays for Multipoint-to-Multipoint Communications: Nonrobust and Robust Designs

Content Provider	IEEE Xplore Digital Library
Author	Chalise, B.K. Vandendorpe, L.
Copyright Year	1991
Abstract	In this paper, we propose algorithms to jointly optimize the multiple multiantenna relays which assist multipoint-to-multipoint communications in wireless networks. Assuming that the knowledge of the second order statistics of the channels such as covariance matrices are available, the multiple-input-multiple-output (MIMO) relays are designed using two different methods: (1) minimize the sum of the powers of the relays while fulfilling the signal-to-interference-plus-noise ratio (SINR) requirements for all destinations and (2) maximize the minimum of the SINRs of all destinations satisfying the transmit power constraint of each MIMO relay. Furthermore, considering the fact that the covariance matrices of the channels between the MIMO relays and destinations are subject to uncertainty due to feedback and quantization errors, the robust versions of the aforementioned methods based on worst-case concept are proposed. It is shown that the proposed nonrobust as well as robust designs are nonconvex optimization problems but they can be solved accurately and efficiently using the standard semidefinite relaxation and randomization techniques. Computer simulations verify the improved performance of the robust designs over nonrobust methods.
Sponsorship	IEEE Signal Processing Society
Starting Page	6355
Ending Page	6368
Page Count	14
File Size	1000283
File Format	PDF
ISSN	1053587X
Volume Number	58
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays MIMO Robustness Channel estimation Covariance matrix Quality of service Interference worst-case performance optimization Channel state information channel uncertainty and convex optimization robust MIMO relays
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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