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FAULT TOLERANT MATRIX PENCIL METHOD FOR DIRECTION OF ARRIVAL ESTIMATION

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Author(s): Yerriswamy T | S.N. Jagadeesha

Journal: Signal & Image Processing
ISSN 2229-3922

Volume: 2;
Issue: 3;
Start page: 55;
Date: 2011;
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Keywords: Direction-of-Arrival | Matrix Completion | Matrix Pencil | Faulty Antenna Array | Singular Value Thresholding.

ABSTRACT
Continuing to estimate the Direction-of-arrival (DOA) of the signals impinging on the antenna array, evenwhen a few elements of the underlying Uniform Linear Antenna Array (ULA) fail to work will be ofpractical interest in RADAR, SONAR and Wireless Radio Communication Systems. This paper proposes anew technique to estimate the DOAs when a few elements are malfunctioning. The technique combinesSingular Value Thresholding (SVT) based Matrix Completion (MC) procedure with the Direct DataDomain (D3) based Matrix Pencil (MP) Method. When the element failure is observed, first, the MC isperformed to recover the missing data from failed elements, and then the MP method is used to estimate theDOAs. We also, propose a very simple technique to detect the location of elements failed, which is requiredto perform MC procedure. We provide simulation studies to demonstrate the performance and usefulness ofthe proposed technique. The results indicate a better performance, of the proposed DOA estimation schemeunder different antenna failure scenarios.
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