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Beam-Space MUSIC DOA System Using Phase Shifter
Seung-Wook NAH Hiroyuki ARAI
Publication
IEICE TRANSACTIONS on Communications
Vol.E90-B
No.2
pp.291-295 Publication Date: 2007/02/01 Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.2.291 Print ISSN: 0916-8516 Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: beamspace MUSIC, chip-sized phase shifter, DOA, quasi-orthogonal, correlation coefficient, microstrip array,
Full Text: PDF(337.3KB)>>
Summary:
This paper presents a low cost and portable DOA (Direction Of Arrival) estimation system for surveillance using a modifed beamspace MUSIC (MUltiple Signal Classification) by a quasi-orthogonal multi-beam. This is instead of DFT processing and hardware system consisting of chip-sized phase shifters, a single ADC (Analogue to Digital Converter) and a single TR (TRanceiver) module for an antenna array. In the beamspace MUSIC, generated beampatterns have orthogonal properties. This proposed system cannot make such a beampattern due to the variable range limitation of phase shifter, then we use the quasi-orthogonal beam obtained by the calculation of correlation coefficient for beampattern. We demonstrate the proposed system using 4-element microstrip array antenna and chip-sized phase shifters. The DOA experiment in anechoic chamber confirms the proposed system performance.
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