NDLI: Polyblock Algorithm-Based Robust Beamforming for Downlink Multi-User Systems With Per-Antenna PowerConstraints

Content Provider	IEEE Xplore Digital Library
Author	Ming Ding Hanwen Luo Wen Chen
Copyright Year	2002
Abstract	In this paper, we investigate the robust beamforming for multi-user multiple-input single-output systems under quantized channel direction information (CDI) with per-antenna power constraints. The robustness of the considered beamforming design is achieved in the sense that the stochastic interference leakage is below a certain level by a given probability. Our design objective is to maximize the expectation of the weighted sum-rate performance. From the discussion of the non-robust optimal beamforming based on the polyblock algorithm, we propose a robust beamforming scheme for the quantized CDI case with per-antenna power constraints. In the proposed beamforming scheme, we use Jensen's inequality to generate a tractable feasibility problem for the polyblock algorithm and apply the semi-definite programming relaxation, as well as the randomization technique to find its approximate rank-one matrix solution and user equipments' beamforming vectors. Simulation results show that substantial gains can be achieved by the proposed scheme compared with the existing schemes in terms of the average weighted sum-rate performance. Although very high complexity is required for the implementation of the proposed scheme, it stands as a good benchmark for robust beamforming designs.
Starting Page	4560
Ending Page	4573
Page Count	14
File Size	1005226
File Format	PDF
ISSN	15361276
Volume Number	13
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Array signal processing Robustness Vectors Interference Quantization (signal) Wireless communication Algorithm design and analysis weighted sum-rate Multi-user robust beamforming per-antenna power constraints quantized CDI polyblock algorithm
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Electrical and Electronic Engineering Computer Science Applications

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