步进频雷达的目标回波建模方法与仿真  

Modeling and Simulation of Target Echo for Stepped Frequency Radar

作　　者：孙鹏 余建宇[1] 郝万兵 SUN Peng;YU Jianyu;HAO Wanbing(Xi'an Electronic Engineering Research Institute, Xi'an 710100)

机构地区：[1]西安电子工程研究所,西安710100

出　　处：《火控雷达技术》2022年第1期45-49,64,共6页Fire Control Radar Technology

摘　　要：本文以调频步进雷达导引头为研究对象,分析了脉内线性调频/脉间步进调频体制雷达的信号模型,利用模糊函数分析并验证了该信号的距离维和速度维的分辨能力,并对目标回波进行建模,分析了点目标的回波模型与一维距离像合成原理,针对步进频雷达特点,根据多散射中心理论建立了基于冲激响应函数法的扩展目标合成的数学模型。通过理论分析与仿真结果,验证了该方法的正确性与可行性。This paper discusses the linearly modulated frequency stepped radar seekers.Firstly,the signal model of the intra-pulse chirp/inter-pulse stepped frequency modulation radar is analyzed.The resolution capability of the signal in range and velocity dimensions is analyzed and verified by using the ambiguity function.Secondly,a model of target echo is developed.The echo model of point targets and the synthesis principle of one-dimensional range profile are analyzed.In addition,a mathematical model of extended target synthesis is established based on impulse response function according to the characteristics of stepped frequency radar and the multiple scattering center theory.Finally,the correctness and feasibility of the proposed method are verified through theoretical analysis and simulation.

关 键 词：频率步进 距离像 冲激响应 扩展目标 

分 类 号：TN95[电子电信—信号与信息处理] TN974[电子电信—信息与通信工程]