DOA Estimation Using Temporal Spatial Virtual Array Based on Doppler Shift with Adaptive PRI Control

Hirotaka HAYASHI

IEICE TRANSACTIONS on Communications   Vol.E99-B    No.9    pp.2009-2018
Publication Date: 2016/09/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2016SNP0006
Type of Manuscript: Special Section PAPER (Special Section on Integration Technologies of Ambient Intelligence and Sensor Networks)
array signal processing,  DOA estimation,  Doppler radar,  MIMO radar,  

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Recently, Doppler radars have been used in various applications from the detection and the classification of indoor human activities to the detection of airplanes. To improve both the degrees of freedom (DOF) and the estimation accuracy of the direction-of-arrival (DOA) of targets, multiple-input multiple-output (MIMO) radar has received much attention in recent years. The temporal spatial virtual array based on Doppler shift of a moving target has been one of methods to improve DOA estimation accuracy. However, the DOA estimation accuracy based on the method depends on the velocity and the direction of the target on which we focus. Also, the temporal spatial virtual array should be generated based on the information of the single target. Thus, it is difficult to implement the method if there are multiple targets. In this paper, we propose a new method that provides high accuracy of DOA estimation by using the temporal spatial virtual array without dependence on the velocity, the direction and the number of existing targets. We demonstrate the DOA estimation accuracy and the effectiveness of the proposed method via simulations.