Estimating Living-Body Location Using Bistatic MIMO Radar in Multi-Path Environment

Keita KONNO  Naoki HONMA  Dai SASAKAWA  Kentaro NISHIMORI  Nobuyasu TAKEMURA  Tsutomu MITSUI  Yoshitaka TSUNEKAWA  

IEICE TRANSACTIONS on Communications   Vol.E98-B    No.11    pp.2314-2321
Publication Date: 2015/11/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E98.B.2314
Type of Manuscript: PAPER
Category: Antennas and Propagation
MIMO,  living-body location,  DOA estimation,  microwave sensor,  array antenna,  

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This paper proposes a method that uses bistatic Multiple-Input Multiple-Output (MIMO) radar to locate living-bodies. In this method, directions of living-bodies are estimated by the MUltiple SIgnal Classification (MUSIC) method at the transmitter and receiver, where the Fourier transformed virtual Single-Input Multiple-Output (SIMO) channel matrix is used. Body location is taken as the intersection of the two directions. The proposal uses a single frequency and so has a great advantage over conventional methods that need a wide frequency band. Also, this method can be used in multipath-rich environments such as indoors. An experiment is performed in an indoor environment, and the MIMO channels yielded by various subject numbers and positions are measured. The result indicates that the proposed method can estimate multiple living-body locations with high accuracy, even in multipath environments.