NDLI: Optimal cooperative relay beamforming for interference minimization

Content Provider	IEEE Xplore Digital Library
Author	Ramezani-Kebrya, A. Min Dong Ben Liang Boudreau, G. Casselman, R.
Copyright Year	2015
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Univ. of Toronto, Toronto, ON, Canada (Ramezani-Kebrya, A.; Ben Liang) \|\| Inst. of Technol., Dept. of Electr., Comput. & Software Eng., Univ. of Ontario, Oshawa, ON, Canada (Min Dong) \|\| Ericsson Canada, Canada (Boudreau, G.; Casselman, R.)
Abstract	We consider a wireless cellular network with multiple amplify-and-forward (AF) relays in each cell, assisting the communication of multiple source-destination pairs with relay transmission beamforming. Our objective is to minimize the maximum interference power among all active receivers in a neighboring cell subject to per-relay power and minimum received SNR constraints. We propose an efficient algorithm to obtain the optimal relay beamforming vectors. We show that even though the optimization problem is non-convex, it has zero Lagrange duality gap and can be converted to a semi-definite programming problem. The performance of the proposed algorithm is studied numerically, both for the case where the interference channel information is exactly known and for the case of inaccurate channel information due to either limited feedback or channel estimation error. It is demonstrated that the min-max interference approach substantially outperforms the alternative where we simply minimize the maximum relay transmission power.
Starting Page	2500
Ending Page	2505
File Size	397640
Page Count	6
File Format	PDF
e-ISBN	9781467364324
DOI	10.1109/ICC.2015.7248700
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-06-08
Publisher Place	UK
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Interference Relays Signal to noise ratio Array signal processing Channel estimation Wireless communication Optimization
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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