基于图形电磁学的近场角闪烁预估方法研究  

Study on Near Field Angular Glint Computation Based on GRECO

作　　者：刘立国[1] 莫锦军[1] 付云起[1] 袁乃昌[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《电子与信息学报》2013年第4期865-870,共6页Journal of Electronics & Information Technology

基　　金：新世纪杰出人才计划(NCET-10-0894);国家自然科学基金(60871069)资助课题

摘　　要：角闪烁的研究大多基于远场条件的假设,但是近场条件下,角闪烁对雷达的跟踪误差产生更大影响,近场角闪烁的研究更加具有学术和实际工程应用意义。该文推导了近场条件下角闪烁线偏差的解析计算方法,并将图形电磁学(GRECO)应用到近场角闪烁的预估中,使其具有实时性强、电大目标计算的能力且不需要散射中心的提取过程。雷达波束不完全覆盖目标的情况被首次考虑,使得全程估计目标的雷达跟踪误差成为可能。通过不同模型的仿真计算结果与理论计算结果比较,验证了计算方法的正确性。The common predictions of angular glint are usually based on the condition of far-field hypothesis. However, computation of near field angular glint is very meaningful both in academic studies and engineering applications due to its huge impact on tracking error. This paper presents an analytic prediction of near field angular glint computing based on Graphic Electromagnetic Computing （GRECO）, which is both in real time and on omission of the process of scattering center extraction. The condition that targets cannot be covered by radar beam is firstly considered, which makes the prediction of tracking error more complete. The correctness is validated by comparison between the simulated results and the theoretical ones of several models.

关 键 词：雷达信号处理 近场角闪烁 近场雷达散射截面 图形电磁学 跟踪误差 

分 类 号：TN957.51[电子电信—信号与信息处理]