SSP'05 -- Proceedings

	IEEE/SP 13th workshop on Statistical Signal Processing July, 17-20, 2005 - Bordeaux - France

Information regarding the paper

Title

Analysis and Design of (non-)Isotropic Arrays for 3D Direction Finding

Author(s)

Houcem Gazzah	University of Edinburgh
Sylvie Marcos	Laboratoire des Signaux et Systemes

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Abstract

We study the impact of the geometry of the (planar) antenna array on the accuracy of the estimated direction(s) of arrivals of an emitting source. We show that, for a fixed elevation angle, the CRBs are cosine functions of azimuth angle. The maximum and minimum points of the cosine function depend on the array geometry. Hence, the array configuration can be chosen in order to ensure a desired (an)isotropic behavior. To do so, we propose a pragmatic methodology that also takes into account the array ambiguity problem. We limit the array search within a family of V-shaped arrays that are advantageously characterized by a single parameter, the angle between the two branches. A performance measure is proposed, then analytically expressed, to assess the array directivity and gain w.r.t. the more standardly used uniform circular array.