NDLI: Data-adaptive array interpolation for DOA estimation in correlated signal environments

Content Provider	IEEE Xplore Digital Library
Author	Lau, B.K. Viberg, M. Leung, Y.H.
Copyright Year	2005
Description	Author affiliation: Dept. of Electroscience, Lund Univ., Sweden (Lau, B.K.)
Abstract	Many popular direction-of-arrival (DOA) estimators rely on the fact that the array response vector of the array is Vandermonde, for example, that of a uniform linear array (ULA). Array interpolation is a preprocessing technique to transform the array response vector of a planar array of arbitrary geometry to that of a ULA over an angular sector. While good approximation within the target sector is attained with the various existing array interpolation approaches, the response of the interpolated array in the out-of-sector region is at best partially controlled. Accordingly, out-of-sector signals, especially those highly correlated with the in-sector signals, can degrade significantly the performance of DOA estimators that rely on the Vandermonde form to work correctly. Recently, we proposed an improved array interpolation approach that takes into account the array response over the full azimuth. In this paper, we develop the idea further and present a simple data-adaptive array interpolation scheme that can provide significantly better accuracy in the DOA estimates. We present examples to demonstrate the effectiveness of our proposal.
Sponsorship	IEEE Signal Processing Soc
File Size	421202
File Format	PDF
ISBN	0780388747
ISSN	15206149
DOI	10.1109/ICASSP.2005.1416166
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-03-23
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Interpolation Direction of arrival estimation Planar arrays Vectors Geometry Azimuth Transmission line matrix methods Phased arrays Degradation Proposals
Content Type	Text
Resource Type	Article

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