频率及频率变化率的快速最大似然估计  

Fast Maximun Likelihood Joint Estimation of Frequency and Frequency Rate

作　　者：秦振华[1] 

机构地区：[1]信息产业部第54研究所,石家庄050081

出　　处：《遥测遥控》2003年第2期1-8,共8页Journal of Telemetry,Tracking and Command

摘　　要：信号参数估计是许多领域 (如雷达、通信、导航和声钠等 )都会遇到的共同问题。文中证明 ,牛顿法是实现频率 (η)和频率变化 (β)最大似然估值器的快速有效算法 ,并且详细分析了牛顿估值器的性能。研究证明 ,对于牛顿法 ,(η,β)是以三次方律收敛于真值 (η,β)的。模拟结果表明 ,当输出信噪比 ( SNR) o≥ 15 d B时 ,估计量的均方误差 ( MSE)达到Cramer-A common problem which is met in many fields(such as radar,communication,navigation and sonar etc.)is that of the signal parameter estimations.We have shown that Newton's method can be used to implement fast and efficiently the joint maximum likelihood estimator of frequency and frequency rate,and the performance of the estimator is analyzed with detail.The rate of convergence of Newton's method is cubic in absence of noise.A simulation show that the MSE of Newton's estimators is practically equal to the corresponding Cramer-Rao bound for (SNR) o≥15dB.

关 键 词：参数估计 信号处理 连续波雷达 最大似然估计 

分 类 号：TM935.3[电气工程—电力电子与电力传动]