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| Micro-Doppler Effect of Rotation Structure on Radar Targets |
| Li Jin-liang①; Wang Xue-song①; Liu Yang①; Liu Jin①; Meng gang②;Wang Tao① |
| ①School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China; ②The National Key Laboratory of Computational Mathematics & Experimental Physics, Beijing 100076, China |
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Abstract Micro-dynamics characteristics are related to target’s structures and can be used for target classification. Rotation structure of target is modeled as a sum of directional point scatterers. With the directional point scatter model, the micro-Doppler effect induced by rotation structure is analyzed. Then the joint time-frequency characteristics of radar echoes from targets which include rotation structure are investigated, and verified by real radar data. Finally, an extraction method of micro-motion characteristics, such as rotation frequency, is presented, and it is attempted to extract micro-dynamics characteristics, and the results are satisfactory.
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Received: 26 November 2007
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2009, Vol. 31 
