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总览 评价 刘宝华 1,2,* , 李运华 1, , 庞洪忠 2, ( 1、 北京航空航天大学自动化科学电气工程学院,北京,100191; 2、 燕山大学河北省并联机器人与机电系统实验室,河北 秦皇岛 066004; ) 摘要: 分数阶Fourier变换由于其特有的性质,非常适和处理
刘宝华1,2,*, 李运华1,, 庞洪忠2,
(
1、北京航空航天大学自动化科学电气工程学院,北京,100191; 2、燕山大学河北省并联机器人与机电系统实验室,河北 秦皇岛 066004; )
摘要:
分数阶Fourier变换由于其特有的性质,非常适和处理LFM信号,尤其是作为一种线性变换,可以克服多分量LFM信号的交叉项的干扰。本文在基于分数阶Fourier变换用于单分量LFM参数估计的基础上,采用预判与分数阶自相关相结合的方法,在分数阶Fourier域对多分量LFM信号模型进行检测和参数估计,极大的减小了计算量,并采用Clean法实现了不同强度LFM信号的分离,抑制了强分量信号对弱分量信号的遮蔽干扰。通过仿真实验表明,该方法具有较好的效果。
关键词:
线性调频信号;分数阶Fourier变换;分数阶自相关;参数估计
LIU Bao-hua1,*, LI Yun-hua2,, PANG hongzhong1,
(
1、School of Automation Science and Electrical Engineering,Beihang University,Beijing; 2、Parallel robot and mechatronic system laboratory,Yanshan University,Qinhuangdao,Hebei; )
Abstract:
FRFT is very comfortable to process LFM signal, especially as a kind of linear transformation, can overcome many component LFM signal cross-term interference because of its special natures. This paper uses anticipation and fractional autocorrelation method to estimate the parameters of multi-component LFM signal in fractional Fourier domain based on FRFT estimating single component LFM signal parameters,and adopts Clean method to realize the separation of different strength LFM signals and inhibiting the strong component signal sheltering the weak component signal.The simulation experiment shows that this method has a good effect.
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