Multi-target localization based on joint utilization of ToA and Doppler using monostatic radar in multipath environment

Zhang Liu; Rui Ding; Libing Jiang; Tianren Sun; Zhuang Wang

doi:10.1117/12.2615975

15 February 2022 Multi-target localization based on joint utilization of ToA and Doppler using monostatic radar in multipath environment

Zhang Liu, Rui Ding, Libing Jiang, Tianren Sun, Zhuang Wang

Author Affiliations +

Proceedings Volume 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021); 121662X (2022) https://doi.org/10.1117/12.2615975
Event: Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 2021, Hong Kong, Hong Kong

Abstract

Multi-target localization in a multipath environment is a complex problem. The localization accuracy of the existing Time of Arrival (ToA)-based monostatic radar localization method is low under the condition of multi targets and a high error level. A multi-target localization method based on joint utilization of ToA and Doppler via monostatic radar is proposed in this paper to solve this problem. The proposed method can improve the localization accuracy effectively under the premise of known ToA and Doppler frequency. Initially, the proposed method analyzes the relationship between the Doppler frequency of multipath returns and the actual velocity of the target. Then the ToA-based localization method can obtain the initial estimation position of each target, and the direction of velocity corresponding to Doppler frequency is obtained according to the initial estimation position. Based on the principle of velocity vector synthesis, we can obtain the estimation velocity of each target. Finally, the invalid position in the initially estimated place is detected by using the velocity consistency theorem. Simulation results show that the proposed method can eliminate the invalid estimation position and improve localization accuracy in a high error level and multiple targets.

Citation Download Citation

Zhang Liu, Rui Ding, Libing Jiang, Tianren Sun, and Zhuang Wang "Multi-target localization based on joint utilization of ToA and Doppler using monostatic radar in multipath environment", Proc. SPIE 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 121662X (15 February 2022); https://doi.org/10.1117/12.2615975

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KEYWORDS

Radar

Doppler effect

Error analysis

Signal detection

Signal processing

Data processing

Radar signal processing

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