Summary
International Symposium on Antennas and Propagation
2012
Session Number:POS2
Session:
Number:POS2-28
Novel 3-D Array Configuration Based on CRLB Formulation for High-resolution DOA Estimation
Hiroki Moriya, Koichi Ichige, Hiroyuki Arai, Takahiro Hayashi, Hiromi Matsuno, Masayuki Nakano,
pp.-
Publication Date:2012/10/29
Online ISSN:2188-5079
Summary:
Direction-Of-Arrival estimation is one of significant techniques for high-speed mobile communication to know wave propagation environment. High resolution DOA estimation algorithms like MUSIC , and ESPRIT have already been widely used in many wireless communication applications. Generally planar array structures are used for 2-D DOA estimation. Planar arrays often well estimate azimuth angles but cannot well estimate elevation angles because of short antenna aperture in elevation direction. Therefore we try to develop a 3-D array configuration which well estimate both azimuth and elevation angles. This paper presents a simple 3-D array configuration by simply modifying the height of some array elements in planar array. We start from the definition of CRLB of DOAs, and show that CRLB of elevation angles could be improved by modifying the height of some array elements in planar array through some examples of actual 3-D arrays. Based on the analysis of CRLB formulation and its dependency on the height of array elements, we develop a 3-D array structure which improves elevation angle estimation accuracy while preserving azimuth angle estimation accuracy. Performance of the proposed array structure is evaluated through some DOA estimation simulations.