一种新的线性调频脉冲信号参数估计算法  

A New Chirp Signal Parameter Estimation Algorithm

作　　者：陈磊[1] 陈殿仁[1] 刘颖[1] 

机构地区：[1]长春理工大学电信学院,吉林长春130022

出　　处：《兵工学报》2014年第2期207-213,共7页Acta Armamentarii

基　　金：武器装备预先研究项目(9140A17010213Bq03003)

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。The output SNR at the true parameter values does not increase and the multiple peaks occur in WVHT image when the traditional Wigner-Ville-I-Iough transform （WVI-IT） 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 de- rived. The relationship among PWVHT output SNR, observation time and sample signal SNR is ana- lyzed. 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.

关 键 词：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—Ville-Hough变换 

分 类 号：TN974[电子电信—信号与信息处理]