NDLI: Interference cancellation beamforming robust to pointing errors

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Volume 7 (2013) : Issue 1, Feb

IET Wireless Sensor Systems

Micro & Nano Letters

The Journal of Engineering

Interference cancellation beamforming robust to pointing errors

Content Provider	IET Digital Library
Author	Zhuang, Jie Manikas, Athanassios
Abstract	The conventional Wiener–Hopf beamformer is subject to substantial performance degradation in the presence of steering vector pointing errors. By removing the effects of the desired signal, the modified Wiener–Hopf beamformer avoids this problem but allows cochannel interferences to pass through in order to maximise the signal-to-noise ratio. In this study, a novel array beamformer is proposed, which not only reduces the effect of pointing errors, but also asymptotically provides complete interference rejection. In particular, the proposed beamformer utilises a vector space projection method and employs a one-step computation for the desired signal power. Using this, the effects of the desired signal can be extracted to form the desired-signal-absent covariance matrix. Thus, a weight vector orthogonal with the interference subspace can be constructed. Numerical results demonstrate the superior performance of the proposed beamformer in the presence of pointing errors relative to other existing approaches such as ‘diagonal loading’, ‘robust Capon’ and ‘signal subspace projection’ beamformers.
Starting Page	120
Ending Page	127
Page Count	8
ISSN	17519675
Volume Number	7
e-ISSN	17519683
Issue Number	Issue 2, Apr (2013)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-spr/7/2
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-spr.2011.0464
Journal	IET Signal Processing
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Algebra Array Beamformer Array Signal Processing Cochannel Interference Covariance Matrices Desired-signal-absent Covariance Matrix Diagonal Loading Electromagnetic Compatibility Integral Equation Interference Interference Cancellation Beamforming Interference Rejection Interference SubSpace Interference Suppression Mathematical Analysis One-step Computation Performance Degradation Radio Link And Equipment Robust Capon Signal Power Signal Processing And Detection Signal SubSpace Projection Beamformer Signal to Noise Ratio Steering Vector Pointing Error Vector Space Projection Method Weight Vector Orthogonal Wiener-Hopf Beamformer Wienerâ€“Hopf Beamformer
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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