雷达目标旋转部件的微Doppler效应

李金梁; 王雪松; 刘阳; 刘进; 孟刚; 王涛

doi:10.3724/SP.J.1146.2007.01808

雷达目标旋转部件的微Doppler效应

doi: 10.3724/SP.J.1146.2007.01808

李金梁^{①;王雪松},
王雪松,
刘阳,
刘进,
孟刚,
王涛

基金项目:

国家973计划安全重大基础研究(6136002)和国家自然科学基金(60672033)资助课题

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出版历程
- 收稿日期: 2007-11-26
- 修回日期: 2008-07-14
- 刊出日期: 2009-03-19

Micro-Doppler Effect of Rotation Structure on Radar Targets

摘要

摘要: 目标的微动特征与目标属性密切相关，可作为目标识别的重要特征。对旋转部件，该文建立了具有空域时变特性的点散射模型。基于此模型，分析了由目标的旋转部件引起的微Doppler效应，对含有旋转部件的目标回波的时频特性进行了理论推导，并利用外场实测数据，得到了雷达目标回波的时频图，与理论推导的结果十分吻合，验证了理论推导的正确性。在此基础上，提出了一种基于短时傅里叶变换的目标微动参数提取方法，利用实测数据对目标的微运动参数提取进行了尝试，得到了很好的结果，为PD雷达的目标特征提取与识别提供了理论指导。
- 雷达目标识别;微运动;微多普勒;旋转部件;时频特性
Abstract: Micro-dynamics characteristics are related to targets 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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参考文献(1)

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