| 一种改进的小波域LFM雷达信号参数估计算法 |
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| 引用本文： | 李利,司锡才,柴娟芳,张雯雯.一种改进的小波域LFM雷达信号参数估计算法[J].海军工程大学学报,2008,20(1):84-88. |
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| 作者姓名： | 李利 司锡才 柴娟芳 张雯雯 |
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| 作者单位： | 1. 哈尔滨工程大学,信息与通信工程学院,哈尔滨,150001;91329部队司令部自动化站,山东,威海,264200
2. 哈尔滨工程大学,信息与通信工程学院,哈尔滨,150001 |
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| 摘 要： | 提出了基于重排小波-Radon变换的线性调频信号的参数估计法。该方法先将小波尺度图转为时频分布图,为提高聚集性引入了时频重排,再将重排图进行Radon变换以进行参数估计。仿真结果表明,该方法有效提高了时频分布图的聚集性,节省了后续Radon变换的时间,同时也抑制了噪声干扰,辨识效果明显提高。
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| 关 键 词： | 小波变换 线性调频信号 Radon变换 时频重排 |
| 文章编号： | 1009-3486(2008)01-0084-05 |
| 修稿时间： | 2007年10月12 |
Improved algorithm for estimating parameters of LFM radar signals based on wavelet |
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| LI Li,SI Xi-cai,CHAI Juan-fang,ZHANG Wen-wen.Improved algorithm for estimating parameters of LFM radar signals based on wavelet[J].Journal of Naval University of Engineering,2008,20(1):84-88. |
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| Authors: | LI Li SI Xi-cai CHAI Juan-fang ZHANG Wen-wen |
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| Abstract: | The wavelet transform is a linear transform which has the time-frequency resolving power.It has no cross-terms for disposing multi-component LFM signals.This paper proposed a parameter estimating method for LFM signals based on wavelet reassignment and Radon transform.With this method the wavelet scale was firstly transformed into the time-frequency distribution.The reassignment was involved to improve aggregation,and then Radon transform was done for parameter estimation.The results show that this method is effective in improving the aggregation of time-frequency distribution.It saves time for the following Radon transform and inhibits the noise at the same time.The effectiveness is improved obviously. |
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| Keywords: | wavelet transform LFM signal Radon transform time-frequency reassignment |
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