| 基于时频分析的LFM信号检测与参数估计 |
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| 引用本文： | 邵智超,吴彦鸿,贾鑫.基于时频分析的LFM信号检测与参数估计[J].装备指挥技术学院学报,2004,15(2):71-75. |
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| 作者姓名： | 邵智超 吴彦鸿 贾鑫 |
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| 作者单位： | 1. 装备指挥技术学院,研究生部,北京,101416
2. 装备指挥技术学院,测量控制系,北京,101416 |
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| 基金项目： | 国家高技术发展计划项目 |
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| 摘 要： | 基于Radon Wigner变换、分数阶Fourier变换与时频分布的关系,利用其对线性调频(linearityfrquencymodulation,LFM)信号良好的时频聚集性,通过计算Radon Wigner变换或分数阶Fourier变换,对线性调频信号LFM信号进行检测和参数估计。理论分析和计算机仿真证明:2种方法对于LFM信号的分析好于Wigner Ville变换等常用的时频变换。
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| 关 键 词： | 线性调频信号 WignerVille分布 RadonWigner变换 分数阶Fourier变换 |
| 文章编号： | CN11-3987(2004)02-0071-05 |
| 修稿时间： | 2003年6月2日 |
Detection and Parameter Estimation of LFM Signal Based on Time-frequency Analysis |
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| SHAO Zhi-chao,WU Yan-hong,JIA Xin.Detection and Parameter Estimation of LFM Signal Based on Time-frequency Analysis[J].Journal of the Academy of Equipment Command & Technology,2004,15(2):71-75. |
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| Authors: | SHAO Zhi-chao WU Yan-hong JIA Xin |
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| Affiliation: | SHAO Zhi-chao~1,WU Yan-hong~2,JIA Xin~2 |
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| Abstract: | Based on the relationship between the Radon-Wigner transform and fractional Fourier transform and the time frequency distribution, using the property that Radon-Wigner transform has better performance in time and frequency domain, detection and parameter estimation of LFM signal have been done by Radon-Wigner transform or fractional Fourier transform. The theoretical analysis and simulation prove that two techniques are better than generic time-frequency transform, such as Wigner-Ville transform. |
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| Keywords: | LFM signal Wigner-Ville distribution(WVD) Radon-Wigner transform(RWT) fractional Fourier transform(FrFT) |
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