Joint Angle, Velocity, and Range Estimation Using 2D MUSIC and Successive Interference Cancellation in FMCW MIMO Radar System

Jonghyeok LEE  Sunghyun HWANG  Sungjin YOU  Woo-Jin BYUN  Jaehyun PARK  

IEICE TRANSACTIONS on Communications   Vol.E103-B   No.3   pp.283-290
Publication Date: 2020/03/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2018EBP3330
Type of Manuscript: PAPER
Category: Sensing
FMCW MIMO radar,  joint angle and Doppler frequency estimation,  2D MUSIC,  successive interference cancellation,  orthogonal projection,  

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To estimate angle, velocity, and range information of multiple targets jointly in FMCW MIMO radar, two-dimensional (2D) MUSIC with matched filtering and FFT algorithm is proposed. By reformulating the received FMCW signal of the colocated MIMO radar, we exploit 2D MUSIC to estimate the angle and Doppler frequency of multiple targets. Then by using a matched filter together with the estimated angle and Doppler frequency and FFT operation, the range of the target is estimated. To effectively estimate the parameters of multiple targets with large distance differences, we also propose a successive interference cancellation method that uses the orthogonal projection. That is, rather than estimating the multiple target parameters simultaneously using 2D MUSIC, we estimate the target parameters sequentially, in which the parameters of the target having strongest reflected power are estimated first and then, their effect on the received signal is canceled out by using the orthogonal projection. Simulations verify the performance of the proposed algorithm.