Beampattern Synthesis With Blind Interference Suppression

• Published in: IEEE transactions on signal processing Vol. 60; no. 9; pp. 4982 - 4986
• Main Authors: Amar, Alon, Doron, M. A.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.09.2012; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Arrays; Beampattern synthesis; Covariance matrix; Detection, estimation, filtering, equalization, prediction; Exact sciences and technology; Information, signal and communications theory; Interference suppression; minimum power distortionless response; Signal and communications theory; Signal to noise ratio; Signal, noise; Telecommunications and information theory; Vectors; Performance evaluation; Interference suppression; Simulation; Noise reduction; Eigenvector; Measurement sensor; Signal processing; Matrix method; Covariance matrix; minimum power distortionless response; Beam forming; Beampattern synthesis
• ISSN: 1053-587X; 1941-0476
• DOI: 10.1109/TSP.2012.2203807

We suggest an adaptive blind interference suppression (BIS) beamformer that synthesizes a desired beampattern. For a strong interference, the principal eigenvector of the data sample covariance matrix approaches the array response at the interference direction. The beamformer weight vector minimizes the distance from a desired beampattern subject to a zero response to this principal eigenvector. For a strong interference, uncorrelated with the desired signal, the asymptotic array gain (AG) of the BIS beamformer achieves the AG of the minimum power distortionless response (MPDR) beamformer. Simulations demonstrate that, for a finite number of samples, the AG of the BIS beamformer outperforms that of the MPDR beamformer and that it is not sensitive to sensor gain and phase errors.