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| Estimation of Micro-motion Feature for Large Accelerated Target |
| LI Yanbing① ZHANG Xiwen② LI Fei① CHEN Daqing③ GAO Hongwei① |
①(Beijing Institute of Radio Measurement, Beijing 100854, China)
②(PLA Representative office in No.23 Institute of the Second Academy of China Aerospace, Beijing 100854, China)
③(Technology Department of Taiyuan Satellite Launch Center, Taiyuan 030027, China) |
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Abstract In a certain observation time duration, the instantaneous frequency of motion target with large acceleration is ambiguous. This case is usually met in flexible-motion target with high velocity. If target has micro-motion, it will cause micro-Doppler modulation which adds in the ambiguous Doppler frequency. In order to extract micro-motion feature of large acceleration target, a parameter estimation method is proposed. Through the ambiguity resolution of Doppler frequency and the estimation and compensation of bulk motion of target, micro-Doppler extraction is achieved. And then, micro-motion period is estimated. Analysis based on simulation and measured data show that the method is suit for micro-motion parameter estimation of large acceleration flexible-motion target.
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Received: 21 March 2016
Published: 30 September 2016
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| Fund: The National Natural Science Foundation of China (61271417) |
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Corresponding Authors:
LI Yanbing
E-mail: xidianlyb@163.com
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