TY - JOUR
T1 - An Efficient Method for Cooperative Multi-Target Localization in Automotive Radar
AU - Zhang, Xudong
AU - Wang, Fangzhou
AU - Li, Hongbin
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2022
Y1 - 2022
N2 - We consider the problem of locating multiple targets using automotive radar by exploiting a pair of cooperative vehicles, which form a mono- A nd bi-static sensing system to provide spatial diversity for localization. Each of the two sub-systems can measure the target echoes. The problem is to determine the locations of multiple targets in the surrounding area. A conventional approach is to directly estimate the target locations from the joint distribution of the mono- A nd bi-static observations, which is computationally prohibitive. In this paper, we propose a efficient two-step method that first uses the delay and angle estimates from each individual system to determine initial target locations, which are subsequently refined via an association and fusion step. Specifically, we use a 2-dimensional (2-D) fast Fourier transform (FFT) based approach to obtain the delay and angle estimates of each target in a sequential manner. The delay/angle estimates obtained by mono-static and bi-static systems lead to two sets of initial target location estimates, which are then sorted and paired via a minimum distance criterion. Finally, the initial location estimates are fused/weighted according to the target strength observed by each system. Simulation results show that our cooperative approach yields significant improved performance over non-cooperative approaches using only the mono-static or bi-static sensing system.
AB - We consider the problem of locating multiple targets using automotive radar by exploiting a pair of cooperative vehicles, which form a mono- A nd bi-static sensing system to provide spatial diversity for localization. Each of the two sub-systems can measure the target echoes. The problem is to determine the locations of multiple targets in the surrounding area. A conventional approach is to directly estimate the target locations from the joint distribution of the mono- A nd bi-static observations, which is computationally prohibitive. In this paper, we propose a efficient two-step method that first uses the delay and angle estimates from each individual system to determine initial target locations, which are subsequently refined via an association and fusion step. Specifically, we use a 2-dimensional (2-D) fast Fourier transform (FFT) based approach to obtain the delay and angle estimates of each target in a sequential manner. The delay/angle estimates obtained by mono-static and bi-static systems lead to two sets of initial target location estimates, which are then sorted and paired via a minimum distance criterion. Finally, the initial location estimates are fused/weighted according to the target strength observed by each system. Simulation results show that our cooperative approach yields significant improved performance over non-cooperative approaches using only the mono-static or bi-static sensing system.
KW - 2-D FFT
KW - Mono-static sensing
KW - bi-static sensing
KW - delay and angle estimation
KW - multiple targets localization
UR - http://www.scopus.com/inward/record.url?scp=85124142007&partnerID=8YFLogxK
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U2 - 10.1109/LSP.2021.3121626
DO - 10.1109/LSP.2021.3121626
M3 - Article
AN - SCOPUS:85124142007
SN - 1070-9908
VL - 29
SP - 16
EP - 20
JO - IEEE Signal Processing Letters
JF - IEEE Signal Processing Letters
ER -