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Direction-of-Arrival Estimation of Coherent Signals Using a Cylindrical Array
Masaki TAKANASHI Toshihiko NISHIMURA Yasutaka OGAWA Takeo OHGANE
IEICE TRANSACTIONS on Communications
Publication Date: 2005/06/01
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.