基于宽带模糊函数的步进频雷达成像特性分析  

Imaging characteristic analysis of SFR by wideband ambiguity function

作　　者：朱永锋[1] 赵宏钟[1] 付强[1] 

机构地区：[1]国防科学技术大学ATR重点实验室,湖南长沙410073

出　　处：《系统工程与电子技术》2010年第9期1889-1893,共5页Systems Engineering and Electronics

摘　　要：频率步进雷达回波脉冲序列时宽-带宽积很大,因此当目标沿雷达视线高速运动时,采用Wood-ward窄带模糊函数不能准确描述高分辨成像的特性。为此,首先分析频率步进雷达运动目标的回波模型,然后推导频率步进信号的宽带模糊函数,最后通过宽带模糊函数的几个特殊切面分析频率步进雷达高速目标成像在时延域与多普勒域的特性,并通过仿真与窄带模糊函数进行对比。Returned bursts of the stepped-frequency radar（SFR） have a very large time-bandwidth product.Consequently,the Woodward narrowband ambiguity function is incapable of describing accurately the characteristics of high-range-resolution images of high-speed targets moving along the line-of-sight of radar.Hence,the echo models of SFR are firstly analyzed,and the wideband ambiguity function（WBAF） of stepped-frequency signals is deduced.Finally,the imaging characteristics of high-speed-target in both time-delay domain and Doppler-shift domain are analyzed through special cuts of the WBAF as well as compared with the narrowband ambiguity function by simulation.

关 键 词：频率步进 模糊函数 宽带模糊函数 

分 类 号：TN957[电子电信—信号与信息处理]