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Resolution Improvement of the MUSIC Algorithm Utilizing Two Differently Polarized Antennas
Toshiharu YAMAKURA Hiroyushi YAMADA Yoshio YAMAGUCHI
IEICE TRANSACTIONS on Communications
Publication Date: 1996/12/25
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Millimeter-wave Short-range Application Systems Technology)
superresolution technique, MUSIC algorithm, polarization, indoor propagation,
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Recently , a short range millimeter wave or a microwave sensing system has been extensively studied to estimate a target position or a source location. It can be applied to indoor propagation analysis, carborne applications, etc. The application of the superresolution technique has been proposed to obtain a high resolution performance in the time domain or the spatial domain. However, the availability of the polarization synthesis in the receiving antennas has not been considered. In this paper, we use a pair of polarized swept frequency data and propose two modifications of the MUSIC algorithm to enhance the resolution of time delay. One modification is the correlation matrix formulation which relates to the total signal power, and the other is a polarization filtering applied to the correlation matrix. These modifications have advantages such that. 1)Reduction of the estimation problem to the delay time estimation only; 2)Easy implementation. Experimental results are illustrated to show the availability of the methods, and to confirm the high resolution performance compared with the conventional method.