| 基于卡尔曼滤波的微弱高频CW电报信号检测 |
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| 引用本文： | 李国军,周晓娜,曾理,林金朝.基于卡尔曼滤波的微弱高频CW电报信号检测[J].山西电子技术,2008(4). |
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| 作者姓名： | 李国军 周晓娜 曾理 林金朝 |
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| 作者单位： | [1]重庆邮电大学,重庆400065 [2]中国人民解放军重庆通信学院,重庆400035 [3]重庆大学,重庆400044 |
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| 基金项目： | 国家自然科学基金项目(60702055); 重庆市科委科技攻关项目(CSTC,2008AB2023) |
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| 摘 要： | 在强噪声背景下，高频CW信号的包络检波检测法难以有效跟踪信号波形，检测性能严重下降。针对此问题，提出一种基于Kalman滤波的微弱CW信号检测方法。该方法采用Kalman滤波器实时捕捉CW信号，恢复强噪声背景下信号的时域波形，提取出比较纯净的CW信号。实验表明该方法能够在强噪声背景下有效地检测出CW信号，具有更高的识别率，且算法简单，实时性强，可用于指导高频CW电报自动接收设备的研制。
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| 关 键 词： | 高频CW信号 微弱信号检测 Kalman滤波 |
Automatic Detection of Weak High-Frequency CW Telegraph Signal |
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| Li Guo-jun, Zhou Xiao-na Zeng Li Lin Jin-zhao.Automatic Detection of Weak High-Frequency CW Telegraph Signal[J].Shanxi Electronic Technology,2008(4). |
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| Authors: | Li Guo-jun Zhou Xiao-na Zeng Li Lin Jin-zhao |
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| Affiliation: | Li Guo-jun1,2 Zhou Xiao-na2 Zeng Li2 Lin Jin-zhao1,3 (1.Chongqing University of Posts , Telecommunications,Chongqing 400065,China,2.Chongqing Institute of Military Telecommunication,Chongqing 400035,3.Chongqing University,Chongqing 400044,China) |
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| Abstract: | The method of detecting high-frequency CW telegraph signal based on amplitude demodulation has a poor performance in strong noise environment.To improve it,this paper presents one new method for detecting weak CW signal based on Kalman filtering.Firstly,Kalman filter is applied to resume CW signal,and then pure CW signal is recognized from interfering signal.Simulation studies show this method is more efficient and simple in the detection of weak CW signal.The new method can be applied to develop automatic ... |
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| Keywords: | high-frequency CW signal weak signal detection Kalman filtering |
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