Chinese Journal of Lasers, Volume. 47, Issue 10, 1010001(2020)

Interference Suppression of Coherent Laser Micro Doppler Radar

Li Yuexin1,2, Sun Jianfeng1, Zhou Yu1, Lu Zhiyong1, Cai Xinyu1,2, and Cong Haisheng1,2
Author Affiliations
  • 1Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 2Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
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    The micro Doppler features of a target can be used as the basis of target recognition. The detection of micro Doppler features is often affected by the vibration of lidar itself in the direction of laser beam, and it is difficult to eliminate the influence of local vibration on the measurement results. In this paper, a method of using the reference point of the target itself to suppress local interference is proposed. The local vibration and relative motion interference can be suppressed by analyzing the beat frequency signal between echo signals from the target position and reference position and the local vibration signal and by the compensation process. Experimental results show that the proposed method has a significant effect on the suppression of local vibration and target relative motion interference, and the relative compensation accuracy is less than 5%. The micro Doppler characteristics obtained after compensation can better reflect the real micro vibration of the target.

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    Li Yuexin, Sun Jianfeng, Zhou Yu, Lu Zhiyong, Cai Xinyu, Cong Haisheng. Interference Suppression of Coherent Laser Micro Doppler Radar[J]. Chinese Journal of Lasers, 2020, 47(10): 1010001

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    Paper Information

    Category: remote sensing and sensor

    Received: Apr. 7, 2020

    Accepted: --

    Published Online: Oct. 9, 2020

    The Author Email:

    DOI:10.3788/CJL202047.1010001

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