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兵工学报 ›› 2014, Vol. 35 ›› Issue (2): 207-213.doi: 10.3969/j.issn.1000-1093.2014.02.011

• 论文 • 上一篇    下一篇

一种新的线性调频脉冲信号参数估计算法

陈磊, 陈殿仁, 刘颖   

  1. (长春理工大学 电信学院, 吉林 长春 130022)
  • 收稿日期:2012-10-10 修回日期:2012-10-10 上线日期:2014-03-25
  • 作者简介:陈磊(1985—),男,讲师,博士研究生
  • 基金资助:
    武器装备预先研究项目(9140A17010213Bq03003)

A New Chirp Signal Parameter Estimation Algorithm

CHEN Lei, CHEN Dian-ren, LIU Ying   

  1. (College of Electronic Information and Engineering, Changchun University of Science and Technology,Changchun 130022, Jilin, China)
  • Received:2012-10-10 Revised:2012-10-10 Online:2014-03-25

摘要: 在采用传统Wigner-Ville-Hough变换(WVHT)进行线性调频脉冲信号检测和参数估计的过程中,当观测数据具有多个线性调频脉冲周期时,在估计参数真值处的输出信噪比不能因为观察时间的增加而变好,反而会在时频变换图中出现多个峰值,影响信号参数的估计性能。为此,研究了一种基于周期WVHT(PWVHT)的线性调频脉冲信号参数估计方法,给出通用信号的PWVHT公式并推导了线性调频脉冲信号的PWVHT公式,分析PWVHT输出信号的信噪比与观测时间和样本信号信噪比的关系,采用MATLAB对PWVHT进行线性调频脉冲信号参数估计的误差进行了仿真。仿真结果表明:在对多线性调频脉冲分量信号进行参数估计时,PWVHT的性能更优。在采用传统Wigner-Ville-Hough变换(WVHT)进行线性调频脉冲信号检测和参数估计的过程中,当观测数据具有多个线性调频脉冲周期时,在估计参数真值处的输出信噪比不能因为观察时间的增加而变好,反而会在时频变换图中出现多个峰值,影响信号参数的估计性能。为此,研究了一种基于周期WVHT(PWVHT)的线性调频脉冲信号参数估计方法,给出通用信号的PWVHT公式并推导了线性调频脉冲信号的PWVHT公式,分析PWVHT输出信号的信噪比与观测时间和样本信号信噪比的关系,采用MATLAB对PWVHT进行线性调频脉冲信号参数估计的误差进行了仿真。仿真结果表明:在对多线性调频脉冲分量信号进行参数估计时,PWVHT的性能更优。

关键词: 〖JP2〗信息处理技术, 线性调频脉冲信号, 参数估计, WignerVilleHough变换, 周期Wigner〖JP〗VilleHough变换

Abstract: The output SNR at the true parameter values does not increase and the multiple peaks occur in WVHT image when the traditional Wigner-Ville-Hough transform (WVHT) is used to detect and estimate chirp radar signals. A chirp signal parameter estimation method based on period WVHT (PWVHT) is studied. The PWVHT formula of general signals is given, and the PWVHT formula of chirp signal is derived. The relationship among PWVHT output SNR, observation time and sample signal SNR is analyzed. The estimation error is analyzed and simulated using MATLAB. The results show that PWVHT is superior to WVHT for estimating a chirp signal that is composed of multiple pulses.

Key words: information processing, chirp signal, parameter estimation, WVHT, PWVHT

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