| Citation: | He Si-san, Zhou Jian-xiong, Zhao Hui-ning, Fu Qiang. Micro-Doppler Signal Extraction Based on AM-LFM Decomposition[J]. Journal of Electronics & Information Technology, 2010, 32(3): 554-558. doi: 10.3724/SP.J.1146.2009.00444
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The issue of micro-Doppler signal separation from collected data of targets with micro-motion structures is addressed. The signal mode for target with micro-motion structures is analyzed and the results show that the Doppler frequency of main body is constant and the micro-Doppler frequency is time varying, which can be fitted by a series of piecewise linear frequency modulation signal. A method, which decomposes radar signal to AM-LFM (amplitude modulation-linear frequency modulation) components and determines each components corresponding structure by frequency modulation rate, is proposed to extract micro-motion echoes from the main body echoes. Simulated and experimental results verify the correctness of proposed method.
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