Journal of Systems Engineering and Electronics

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Improved HHT and its application in narrowband radar imaging for precession cone-shaped targets

Shen Zhao1,2,*, Jie Niu3, Xiang Li3, and Chunjie Qiao1   

  1. 1. College of Mechatronics and Automation, National University of Defense Technology, Changsha 410073, China;
    2. Department of Missile Engineering, Ordnance Engineering College, Shijiazhuang 050003, China;
    3. College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • Online:2014-12-29 Published:2010-01-03


Imaging the spatial precession cone-shaped targets with narrowband radar is a new technical approach in mid-course recognition problem. However, most existing time-frequency methods still have some inevitable deficiencies for extracting micro-Doppler information in practical applications, which leads to blurring of the image. A new narrowband radar imaging algorithm for the precession cone-shaped targets is proposed. The instantaneous frequency of each scattering point is gained by using the improved Hilbert-Huang transform, then the positions of scattering points in the parameter domain are reconstructed. Numerical simulation and experiment results confirm the effectiveness and high precision of the proposed algorithm.