基于评价函数的步进频率信号速度补偿研究  

Velocity Compensation of Stepped Frequency Signal Based on Evaluation Function

作　　者：林云[1] 司锡才[1] 

机构地区：[1]哈尔滨工程大学信息技术研究所,哈尔滨150001

出　　处：《航空兵器》2009年第3期31-35,共5页Aero Weaponry

摘　　要：运动目标的速度是影响高分辨率雷达宽带一维像性能的重要因素之一,在进行高速目标的宽带回波信号处理时必须进行速度补偿。本文首先分析了步进频率宽带信号混频处理原理和目标速度对一维像的影响。在此基础上提出了最小波形熵、最大对比度和l1范数三种基于回波数据不同特征的评价函数,该函数直接利用回波数据估计目标速度,详细分析了该方法的数学原理、步骤、效果、适用条件等。仿真结果证明,采用上述方法不需要辅助信息,但补偿精确,总体效果好。The velocity of moving target is one of the important factors which affecting the performance of wide-band range profile. HRR radar needs velocity compensation when the wide-band signal of high speed target is processed. Firstly, this paper analyses the frequency mixing principle of stepped frequency wide-band signal and the influences of target moving velocity on one-dimensional image, then brings forward three kinds of evaluation functions based on different character of echo wave, which can be used to estimate target speed directly. The math principle, procedure, effect and appropriate condition are analyzed in detail. The simulation proves that this method needn＇t supplementary information and have high compensation precision and good compensation result.

关 键 词：评价函数 步进频率 速度补偿 

分 类 号：TN958.3[电子电信—信号与信息处理]