期刊
IEEE SENSORS JOURNAL
卷 21, 期 5, 页码 6520-6529出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2020.3041363
关键词
Radar tracking; Target tracking; Radar; Radar imaging; Sensors; Chirp; Transmitting antennas; Target tracking; angular glint; instable points exclusion; nonlinear angular discrimination; terahertz tracking system
资金
- Key-Area Research and Development Program of Guangdong Province [2019B010157001]
- National Key Research and Development Program of China [2018YFF01013004, 2017YFA0701004]
- National Natural Science Foundation of China [61671432, 61731020, 61988102]
- Key Project of Equipment Pre-Research Fund [6140413010401]
- Key Program of Scientific and Technological Innovation from Chinese Academy of Sciences [KGFZD-135-18-029]
This paper studies methods of moving targets tracking in the THz band, proposing an improved tracking method to suppress angular glint and enhance tracking accuracy. Proof-of-principle experiments demonstrate the effectiveness of the improved method in eliminating tracking failure and significantly improving tracking accuracy.
This paper studies the methods of moving targets tracking based on a multi-beam tracking system in terahertz (THz) band, which is an initial attempt in this field. Taking the advantage of forming high resolution range profile of THz radar, a target geometric center tracking method is developed at first. However, the tracking performance is deteriorated by the severe angular glint and system disturbance. A further analysis on the experiment data finds a statistical correlation between the angular glint and the normalized amplitude variance, which is exploited to identify and exclude instable scatterers. A non-linear angular discrimination function is also established to deal with the anomalous measurement of the radar. Finally, an instable point exclusion method and a nonlinear angular discrimination method are proposed and combined to develop an improved tracking method, which can suppress angular glint and mitigate measuring perturbation, hence promoting the tracking performance. Proof-of-principle experiments are performed with a multi-beam tracking system working in 0.2 THz band. Tracking results of different targets demonstrate that the improved tracking method can effectively eliminate the tracking failure and significantly promote the tracking accuracy.
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