| 基于时频分析的雷达信号滤波方法 |
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| 引用本文： | 王殿伟,李言俊,张科,徐焕民.基于时频分析的雷达信号滤波方法[J].计算机测量与控制,2008,16(12):1909-1911. |
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| 作者姓名： | 王殿伟 李言俊 张科 徐焕民 |
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| 作者单位： | 1. 西北工业大学航天学院,陕西,西安,710072
2. 酒泉卫星发射中心雷达测量站,甘肃,酒泉,735000 |
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| 基金项目： | 国家自然科学基金
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航空基础科学基金
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| 摘 要： | 深空目标的雷达回波信号较弱而且受噪声干扰严重,给检测识别工作带来很大的困难;提出了一种时频滤波方法,将基于广义S变换的时频滤波引入到雷达回波信号去噪当中;采用广义S变换对回波信号进行时频分析,利用变换结果求解信号的瞬时频率,并构造了一种时频滤波器.对雷达回波信号进行时频滤波处理并对滤波效果进行分析;仿真结果表明,经滤波后信噪比有较大提高,且很好保留了信号特征。
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| 关 键 词： | 广义S变换 信号处理 时频分析 时频滤波 |
Filter Method of Radar Signal Based on Time-frequency Analysis |
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| Wang Dianwei,Li Yanjun,Zhang Ke,Xu Huanmin.Filter Method of Radar Signal Based on Time-frequency Analysis[J].Computer Measurement & Control,2008,16(12):1909-1911. |
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| Authors: | Wang Dianwei Li Yanjun Zhang Ke Xu Huanmin |
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| Affiliation: | Wang Dianwei Li Yanjun Zhang Ke Xu Huanmin (1.College of Astronautics,Northwestern Polytechnical University,Xi’an 710072,China;2.Radar Tracking Station of Jiuquan Satellite Launch Centre,Jiuquan 735000,China) |
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| Abstract: | The radar echo signal of targets in space is weak and interfered by noise seriously so it is difficult to detect and recognize them. An algorithm of time-frequency filter has been presented and a new method of time-frequency filter based on generalized S-transform has been introduced to radar signal processing.Introduced the rationale of S-transform and generalized S-transform and calculation method of instantaneous frequency.Constructed a kind of time-frequency filter and applied to the radar echo signal with noise.Analysis of filtering performance was presented.Simulation result showed that the method has good performance in improving signal-to-noise ratio meanwhile preserving the features of effective signal. |
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| Keywords: | the generalized S-transform time-frequency analysis signal processing time-frequency filter |
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