摘要
频率步进雷达(SFR)导引头通过在频域进行带宽合成,距离分辨力显著提高,可以分辨出复杂目标的细节特征,从而进行抗干扰分析与目标识别。在进行SFR回波信号仿真时,要求回波模型能符合并反映目标的细节特征,目标不能等效为点目标,而散射中心提取法则意味着散射点的舍弃和合并,对目标的细节描述并不准确,为此提出基于FEKO的复杂目标回波信号产生方法。根据频率步进雷达信号时域特征,推导出直接利用FEKO的散射场数据进行时域回波计算的数学模型,并使用FEKO提取目标在各种入射角度下的散射场幅度和相位信息进行存储,在仿真时直接调用散射场数据进行时域回波计算,从而得到复杂目标的高拟真度回波信号模型,在空空导弹数字仿真、半实物仿真和抗干扰研究中具有实用意义。
By synthesizing bandwidth in the frequency domain,the distance resolution of Stepped Frequency Radar(SFR)seeker can distinguish the detailed features of complex targets,so as to conduct anti-interference and target identification.When implementing SFR echo simulations,echo model are required to accord with the targets on detailed features,and the target is no longer point target.Nevertheless,using the scattering center extraction means some of the scattering points are discarded and merged,and the detailed description of the target is not accurate.Therefore,a method of generating complex target echo model based on FEKO is proposed,according to the time domain characteristics of the SFR signal,time domain echo model using the scattering data based on FEKO is deduced.In addition,FEKO is utilized to extract the scattering field amplitude and phase information of the target at various incident angles and the information is stored in database.When simulation is implemented,time domain echo calculation is conducted by directly employing stored scattering data,thus high fidelity echo model of complex target can be obtained.This method for echo modeling has practical value in air-to-air missile digital simulation,hardware-in-loop simulation and anti-jamming research.
作者
庞维建
李志强
刘洪全
同志强
杨国胜
PANG Weijian;LI Zhiqiang;LIU Hongquan;TONG Zhiqiang;YANG Guosheng(Beijing Aviation Engineering Technology Research Center,Beijing 100076,China)
出处
《太赫兹科学与电子信息学报》
北大核心
2019年第6期994-999,共6页
Journal of Terahertz Science and Electronic Information Technology
