| 基于小波脊线-Hough变换的LFM信号检测 |
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| 引用本文： | 郑生华,徐大专. 基于小波脊线-Hough变换的LFM信号检测[J]. 量子电子学报, 2008, 25(2): 145-150 |
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| 作者姓名： | 郑生华 徐大专 |
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| 作者单位： | 南京航空航天大学信息科学与技术学院,江苏,南京,210016;中国电子科技集团第38研究所,安徽,合肥,230031;南京航空航天大学信息科学与技术学院,江苏,南京,210016 |
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| 基金项目： | 国家高技术研究发展计划(863计划)，航空基础科学基金 |
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| 摘 要： | 线性调频(LFM)信号是现代雷达广泛使用的一种大时宽-带宽积的低截获概率信号,根据线性调频信号的小波变换特性,小波脊线与瞬时频率的对应关系,提出了一种检测线性调频信号的联合小波脊线-Hough变换方法,该方法首先计算信号的小波变换,得到二维时-频能量分布图,采用脊算法提取信号的小波脊线,然后在小波脊线时-频平面上再进行Hough变换,从而检测噪声中的线性调频信号并估计信号参数.仿真结果证明,此方法可有效地对线性调频类信号进行检测,并且有较好的抗噪声性能.
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| 关 键 词： | 图像处理 信号检测 Hough变换 小波脊线 LFM信号 小波变换 |
| 文章编号： | 1007-5461(2008)02-0145-06 |
| 收稿时间： | 2007-06-06 |
| 修稿时间： | 2007-06-06 |
Detection of LFM signals based on wavelet ridge extracting and Hough transform |
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| ZHENG Sheng-hua,XU Da-zhuan. Detection of LFM signals based on wavelet ridge extracting and Hough transform[J]. Chinese Journal of Quantum Electronics, 2008, 25(2): 145-150 |
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| Authors: | ZHENG Sheng-hua XU Da-zhuan |
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| Affiliation: | ZHENG Sheng-hua~(1,2) XU Da-zhuan~1 1 College of Information Science , Technology,Nanjing University of Aeronautics , Astronautics,Nanjing 210016,China 2 The 38th Institute of CETC,Hefei 230031,China |
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| Abstract: | Owing to its high time bandwidth product and low probability of intercept,linear frequency modulated signal is widely used in modern radar.Based on wavelet ridge extracting of linear frequency modulated(LFM)signal,a new method used to detect and estimate the LFM signal is presented.It computes the wavelet transform of the signal firstly to obtain the 2D time-scale image,and then extracts the wavelet ridge of the signal with ridge extracting algorithm,finally performs the Hough transform in the time-frequenc... |
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| Keywords: | image processing signal detection Hough transform wavelet ridge LFM signal wavelet transform |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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