NDLI: Robust leakage-based transmit beamforming with probabilistic constraint for downlink multi-user MIMO system

Content Provider	IEEE Xplore Digital Library
Author	Huiqin Du Pei-Jung Chung
Copyright Year	2009
Description	Author affiliation: School of Engineering, The University of Edinburgh, UK (Huiqin Du; Pei-Jung Chung)
Abstract	Multi-user multiple-input and multiple-output (MU-MIMO) wireless systems have the potential to provide a substantial gain by using transmit beamforming to allow multi-user communication in the same frequency and time slots. The main challenge for transmit beamforming design is to suppress the co-channel interference (CCI) from other users. In order to completely cancel the CCI at each user, perfect channel state information (CSI) is required at base station, which is generally not available in practice. To overcome the performance degradation caused by the imperfections, the most common approach is the worst-case method, which leads to conservative result as the extreme (but rare) conditions may occur at a very low probability. In this work, we propose a probabilistic-constrained beamforming based on signal-to-leakage ratio (SLR) criterion under consideration of inaccurate channel information. The simulation results show that the proposed beamformer achieves the lowest bit error rate (BER) and leaks the least transmit power from the desired user to all other users among the state-of-art transmit beamformers.
Starting Page	317
Ending Page	320
File Size	140487
Page Count	4
File Format	PDF
ISBN	9781424427093
e-ISBN	9781424427116
DOI	10.1109/SSP.2009.5278576
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-08-31
Publisher Place	United Kingdom
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Robustness Array signal processing Downlink MIMO Radiofrequency interference Bit error rate Interference constraints Frequency Interchannel interference Channel state information robust transmit beamforming Signal-to-leakage ratio probabilistic constraint
Content Type	Text
Resource Type	Article

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