A new method of radar micro-motion feature extraction of cone targetbased on empirical mode decomposition

作者：Niu Jie^*; Liu Yong Xiang; Qin Yu Liang; Jiang Wei Dong; Li Xiang

来源：Acta Electronica Sinica, 2011, 39(7): 1712-1715.

• Cone targets
• Decomposition methods
• Empirical Mode Decomposition
• Geometry features
• Instantaneous frequency
• Intrinsic Mode functions
• Micro-motion feature extraction
• Modulating functions
• Multicomponents
• Range ratio
• Short time Fourier transforms
• Sinusoidal frequency

This paper studies on the cone target. Firstly, the modulating function of a precession target on the radar is analyzed. Then, the decomposition method of multi-component sinusoidal frequency modulated signal based on empirical mode decomposition (EMD) is studied. The instantaneous frequency of each intrinsic mode function is gained by using Short Time Fourier Transform (STFT). The precession features of precession period, precession angle, micro-motion range ratio of different scatters and geometry feature of aspect ratio are extracted. Finally, the results of feature extraction by utilizing the darkroom measurement are shown in figures, which validate the ideas.

• 出版日期2011