Direction-of-Arrival Estimation of Coherent Signals Using a Cylindrical Array

Masaki TAKANASHI  Toshihiko NISHIMURA  Yasutaka OGAWA  Takeo OHGANE  

IEICE TRANSACTIONS on Communications   Vol.E88-B   No.6   pp.2588-2596
Publication Date: 2005/06/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.6.2588
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Antennas and Propagation
circular array,  cylindrical array,  UCA-Root MUSIC,  superresolution technique,  coherent signals,  

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Mainly, a uniform linear array (ULA) has been used for DOA estimation of coherent signals because we can apply the spatial smoothing preprocessing (SSP) technique. However, estimation by a ULA has ambiguity due to the symmetry, and the estimation accuracy depends on the DOA. Although these problems can be solved by using a uniform circular array (UCA), we cannot estimate the DOA of coherent signals because the SSP technique cannot be applied directly to the UCA. In this paper, we propose to estimate 2-dimensional DOA (polar angles and azimuth angles) estimation of coherent signals using a cylindrical array which is composed of stacked UCAs.