电信科学 ›› 2018, Vol. 34 ›› Issue (2): 74-80.doi: 10.11959/j.issn.1000-0801.2018089

• 研究与开发 • 上一篇    下一篇

正弦调频连续波信号参数估计新方法

聂小鹏1,沈祖成1,王晓峰2,王春雨2   

  1. 1 三峡大学电气与新能源学院,湖北 宜昌 443002
    2 空军航空大学信息对抗系,吉林 长春 130022
  • 修回日期:2018-01-18 出版日期:2018-02-01 发布日期:2018-02-13
  • 作者简介:聂小鹏(1997-),男,三峡大学电气与新能源学院在读,主要研究方向为电气工程及其自动化。|沈祖成(1973-),男,三峡大学电气与新能源学院副教授,主要研究方向为电气工程及其自动化。|王晓峰(1987-),男,博士,空军航空大学信息对抗系讲师,主要研究方向为信号与信息处理。|王春雨(1983-),女,空军航空大学信息对抗系副教授,主要研究方向为信号与信息处理。

A new method of parameter estimation for sinusoidal frequency modulated continuous wave signal

Xiaopeng NIE1,Zucheng SHEN1,Xiaofeng WANG2,Chunyu WANG2   

  1. 1 College of Electrical Engineering and New Energy,China Three Gorges University,Yichang 443002,China
    2 Department of Information Countermeasure,Aviation University of Air Force,Changchun 130022,China
  • Revised:2018-01-18 Online:2018-02-01 Published:2018-02-13

摘要:

针对电子侦察截获的正弦调频连续波信号,提出一种调制参数估计的新方法。首先基于信号调制函数的周期性,采用自相关函数完成调制频率估计,然后基于重排谱图提取调频曲线,对调频曲线进行修正,进而实现载频、调制指数和初始调制相位的估计。仿真实验表明,该方法在无需先验知识,且信噪比为-5 dB时,各调制参数均具有较高的估计精度,均方误差均能低于-25 dB。

关键词: 正弦调频连续波信号, 参数估计, 自相关函数, 重排谱图

Abstract:

A new method of modulation parameter estimation was proposed to process the sinusoidal frequency modulated continuous wave signal intercepted by electronic reconnaissance.Firstly,based on the periodicity of signal modulation function,the modulated frequency was estimated using autocorrelation function.And then,the frequency modulation curve was extracted and revised based on rearranging spectrogram.Finally,the carrier frequency,the modulation exponent and the initial phase were estimated by the frequency modulation curve.The simulation experiment results show that the proposed method does not require prior knowledge,and the mean square error of each modulation parameter can reach -25 dB by using this method when SNR is -5 dB.

Key words: sinusoidal frequency modulated continuous wave signal, parameter estimation, autocorrelation function, rearrangement spectrogram

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