Journal of Terahertz Science and Electronic Information Technology , Volume. 22, Issue 6, 638(2024)

A range velocity estimation and relocation method for ground moving targets of terahertz CSAR

LONG Na1, LI Jin1,2、*, KUANG Caijie1, LI Yuliang1, MIN Rui1, and PI Yiming1
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  • 1[in Chinese]
  • 2[in Chinese]
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    In Circular Synthetic Aperture Radar(CSAR), the range equation between radar and ground moving target is complicated because the radar platform flies around the circumference of the observation scene, and there is a complex coupling relationship between range direction parameters and azimuth direction parameters of target , which makes it difficult to estimate the range velocity of moving target independently. A method for estimating the range velocity of moving target in terahertz CSAR based on sub-aperture division is proposed. By selecting a suitable angle of sub-apertures , sub-aperture division is performed on CSAR. Under the condition of sub-aperture, the decoupling between the range velocity of moving target and other parameters can be realized by small angle approximation , and the range velocity of moving target can be accurately estimated , which can achieve accurate relocation of moving target . The effectiveness of the proposed algorithm is verified by simulation and measured data.

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    LONG Na, LI Jin, KUANG Caijie, LI Yuliang, MIN Rui, PI Yiming. A range velocity estimation and relocation method for ground moving targets of terahertz CSAR[J]. Journal of Terahertz Science and Electronic Information Technology , 2024, 22(6): 638

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    Paper Information

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    Received: Jan. 24, 2024

    Accepted: --

    Published Online: Aug. 22, 2024

    The Author Email: Jin LI (lijin@uestc.edu.cn)

    DOI:10.11805/tkyda2024058

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