高速运动环境下的调频步进信号运动参数估计  

Estimation of a high-velocity target's motion parameters for a modulated frequency stepped radar

作　　者：孙慧霞[1] 刘峥[1] 曹运合[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2011年第1期136-141,共6页Journal of Xidian University

基　　金：国家自然科学基金资助项目(60901068)

摘　　要：针对高速运动环境下调频步进信号的速度补偿问题,提出了包络相关法和最小脉组误差法相结合的测速方法,首先用包络相关法对目标速度进行粗测,然后以粗测速度为中心,在一个速度周期内利用最小脉组误差法对速度进行精测,从而避免了最小脉组误差法可能存在的局部极小值问题.仿真结果表明,该方法测速精度高,并且具有较好的抗噪性.Aiming at the motion compensation for the modulated stepped frequency radar signal echoed by a moving target, we develop a new method combining envelope correlation and the least burst error rule for estimating the velocity. First, the coarse velocity is measured by using envelope correlation, then the refined velocity is estimated by utilizing the least burst error rule based on the coarse velocity, which avoids the problem of the local minimum existing in the least burst error method. Simulation results indicate that the method can accomplish accurate estimation of target motion parameters with good anti-noise performance.

关 键 词：调频步进雷达 速度补偿 包络相关 最小脉组误差 

分 类 号：TN958[电子电信—信号与信息处理]