| 基于STFT的跳频信号参数估计 |
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| 引用本文： | 卢云生,董英英. 基于STFT的跳频信号参数估计[J]. 舰船电子工程, 2011, 31(10): 73-74,176 |
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| 作者姓名： | 卢云生 董英英 |
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| 作者单位： | 1. 中国电子科技集团公司第三十六研究所,嘉兴,314033
2. 武汉软件工程职业技术学院,武汉,430250 |
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| 摘 要： | 针对跳频信号的非平稳性和频率的时变性,文章采用短时傅里叶变换（STFT）对跳频信号进行了分析,并基于STFT对跳频信号的跳频周期、跳频时刻和跳频频率等参数进行了估计。最后分析了窗宽对参数估计的影响。仿真结果表明,采用STFT方法可以有效估计出跳频信号的特征参数,为通信侦察系统进行跳频信号分选打下了良好的基础。
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| 关 键 词： | 跳频信号 跳频周期 跳频时刻 跳频频率 窗宽 |
Parameter Estimation of Frequency-Hopping Signals Based on STFT |
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| Lu Yunsheng) Dong Yingying),Jiaxing ),Wuhan ). Parameter Estimation of Frequency-Hopping Signals Based on STFT[J]. Ship Electronic Engineering, 2011, 31(10): 73-74,176 |
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| Authors: | Lu Yunsheng) Dong Yingying) Jiaxing ) Wuhan ) |
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| Affiliation: | Lu Yunsheng1) Dong Yingying2)(No.36 Research Institute of CETC1),Jiaxing 314033)(Wuhan Vocational College of Software and Engineering2),Wuhan 430250) |
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| Abstract: | Aiming at the nonstationary and frequency variability of frequency-hopping signals,STFT is taken to analyse frequency-hopping signals.The period,time and frequency parameters of frequency-hopping signals is estimated based on STFT.Lastly,the influence of width of window to parameter estimation is analysed.The result of simulation shows that the characteristic parameters of frequency-hopping signals could be estimated by STFT,which is the foundation of HF signal classifying by communication scout system. |
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| Keywords: | frequency-hopping signals frequency-hopping period frequency-hopping time frequency-hopping frequency width of window |
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