基于广义S变换的空间锥体进动微多普勒分析

雷 鹏; 王 俊; 孙进平; 李少洪

基于广义S变换的空间锥体进动微多普勒分析

北京航空航天大学电子信息工程学院, 北京 100191

详细信息

作者简介:
雷鹏(1985-),男,陕西渭南人,博士生,buaaray@gmail.com.

中图分类号: TN 959.1⁺7
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出版历程
- 收稿日期: 2009-08-17
- 网络出版日期: 2010-09-30

Micro-Doppler analysis of spatial coning precession based on generalized S transform

School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 锥体进动特性是用于空间目标识别的重要依据之一.为了研究这一问题,提出一种基于广义S变换的空间锥体进动微多普勒特性分析方法.根据锥体进动的物理运动过程建立了相应的数学模型,推导出锥体进动微多普勒频率的理论表达式,并通过仿真结果验证其正确性.该模型采用共原点的目标多坐标体系,使其仅存在旋转关系,从而简化了模型的结构与计算复杂性.在此基础上,利用广义S变换实现了对模拟雷达进动回波的微多普勒特性分析.在不同信噪比条件下的仿真结果表明:该方法时频分辨性较好,而且具有较高的鲁棒性.
- 微多普勒 /
- 广义S变换 /
- 空间目标 /
- 锥体进动 /
- 鲁棒性
Abstract: Precession characteristic is one of the significant properties for cone-shaped spatial target recognition. To analysis the micro-Doppler feature induced by precession, a method based on the generalized S transform was proposed. In the mathematical model of coning precession, the multi-coordinate system with the same origin was used to simplify model structure and computation complexity. Then the theoretical expression of the micro-Doppler due to precession was derived. The validity of the model was confirmed by computer simulation. Based on simulated radar data for precession cone, the generalized S transform was introduced and used to analyze the micro-Doppler feature in the condition of different signal to noise ratio (SNR). The experimental results in the joint time-frequency domain show that the method has large advantage in the time-frequency resolution, and is robust for the complicated micro-Doppler signal at low SNR.
- micro-Doppler /
- generalized S transform /
- spatial target /
- coning precession /
- robustness

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参考文献(1)

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