基于CEMD的旋翼微动目标杂波抑制方法

doi:10.7527/S1000-6893.2018.22082

Abstract

Abstract: A method for clutter suppression of the micro-motion target is proposed based on Complex Empirical Mode Decomposition (CEMD). First, a model for the rotor micro-motion target signal mixed with the ground clutter is established. Second, the differences of the clutter and the micro-motion signal in the time-frequency domain are analyzed. Based on Gabor transform and CEMD, several Different Intrinsic Mode Functions (IMF) components when the micro-motion signal is superior are selected according to the proportion of the energy occupied by IMF in the total energy. The rotor micro-motion target in the time domain and time-frequency domain is then reconstructed to separate the clutter from the rotor micro-motion target and achieve the effect of clutter suppression. Finally, the method proposed is compared with the conventional method. Simulation results verify the effectiveness of the proposed method.

Key words: micro-motion, clutter suppression, Gabor transform, Complex Empirical Mode Decomposition (CEMD), Intrinsic Mode Functions (IMF)

CLC Number:

V275⁺.1

XIA Saiqiang, XIANG Hu, CHEN Wenfeng, YANG Jun, CHEN Yichang. Clutter suppression method for rotor micro-motion target based on CEMD[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2018, 39(9): 322082-322091.

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Clutter suppression method for rotor micro-motion target based on CEMD

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