| 基于Radon-Ambiguity变换的多分量LFM信号检测与参数估计 |
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| 引用本文： | 刘爱芳,朱晓华,陆锦辉,刘中. 基于Radon-Ambiguity变换的多分量LFM信号检测与参数估计[J]. 南京理工大学学报(自然科学版), 2004, 28(4): 409-413 |
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| 作者姓名： | 刘爱芳 朱晓华 陆锦辉 刘中 |
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| 作者单位： | 南京理工大学,电子工程与光电技术学院,江苏,南京,210094;南京理工大学,电子工程与光电技术学院,江苏,南京,210094;南京理工大学,电子工程与光电技术学院,江苏,南京,210094;南京理工大学,电子工程与光电技术学院,江苏,南京,210094 |
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| 基金项目： | 国家“8 6 3”计划 (2 0 0 2AA73114 2 ) |
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| 摘 要： | 介绍了Radon—Ambiguity变换(RAT)的定义和基本性质，结合解线调技术提出了一种基于RAT的线性调频(LFM)信号检测与参数估计方法，该方法能用较少的计算量完成对LFM信号的检测与参数估计。为解决多分量条件下LFM信号分量之间交叉项的影响，基于逐次消去思想，提出了一种基于RAT的多分量LFM信号检测与参数估计算法，它可以有效地解决强度相差较大的多分量LFM信号的检测和参数估计问题。仿真实验结果验证了该算法的有效性。
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| 关 键 词： | Radon-Ambiguity变换 线性调频信号 参数估计 |
| 文章编号： | 1005-9830(2004)04-0409-05 |
| 修稿时间： | 2003-03-22 |
Multicomponent LFM Signal Detection and Parameters Estimation Based on Radon-Ambiguity Transform |
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| LIU Ai fang,ZHU Xiao hua,LU Jin hui,LIU Zhong. Multicomponent LFM Signal Detection and Parameters Estimation Based on Radon-Ambiguity Transform[J]. Journal of Nanjing University of Science and Technology(Nature Science), 2004, 28(4): 409-413 |
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| Authors: | LIU Ai fang ZHU Xiao hua LU Jin hui LIU Zhong |
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| Abstract: | Basic principle of LFM(linear frequency modulated) signal detection and parameters estimation using Radon Ambiguity transform (RAT) was analyzed, and the results indicate that the initial frequency of LFM signal can not be estimated by using the RAT directly. To resolve this problem, an improved scheme combining RAT with dechirp technique was proposed, which could estimate all parameters of LFM signal at the cost of little additional computation load. By applying the CLEAN technique to the improved scheme, a novel RAT based algorithm was presented, which could detect weak LFM components embedded in strong LFM components. The computer simulation results prove its effectiveness. |
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| Keywords: | Radon Ambiguity transform linear frequency modulated signal parameters estimation |
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