宽带线性调频雷达信号多普勒效应分析与处理  

Doppler effect analysis and processing for wideband linear frequency modulated radar signal

作　　者：文树梁 袁起[1] 何佩坤 毛二可[1] 秦忠宇[2] 

机构地区：[1]北京理工大学电子工程系,北京100081 [2]中国航天科工集团二院二十三所,北京100854

出　　处：《系统工程与电子技术》2005年第4期573-577,共5页Systems Engineering and Electronics

摘　　要：宽带线性调频信号是地基宽带成像雷达的一种常用波形。先推导了目标运动时宽带线性调频信号Stretch处理的雷达回波数学模型,利用宽带模糊函数(WBAF)分析了目标运动对该信号的影响,得出了该信号形式的多普勒容限,同时也分析了目标加速度对目标距离像的影响,并提出了该信号的多普勒处理补偿的方法与不需要加速度补偿的条件。模拟实验表明。Wideband linear frequency modulated signal is a kind of waveform commonly used in ground-based wideband imaging radar. A mathematic model for wideband linear frequency modulated signal Stretch processing when target is moving is obtained, the effect of the target acceleration on target range profile is studied. the influence of target motion is analyzed by using wideband ambiguity function (WBAF), and Doppler tolerance is derived. The signal processing and compensation methods are proposed, and the conditions for compensation without acceleration are also established. Simulation results demonstrate the Doppler effect analysis and the compensation methods for wideband linear frequency modulated signal processing are effective.

关 键 词：宽带雷达 CHIRP信号 STRETCH处理 多普勒效应 

分 类 号：TN957.51[电子电信—信号与信息处理]