区域电磁环境的动态特性表征  

Manifestion of Electromagnetic Environment Based on Mathematical Morphology and Fractal Theory

作　　者：郭淑霞[1] 张磊[1] 董文华[1] 高颖[2] 

机构地区：[1]西北工业大学无人机特种技术国防重点实验室,陕西西安710065 [2]西北工业大学航海学院,陕西西安710072

出　　处：《西北工业大学学报》2016年第4期703-707,共5页Journal of Northwestern Polytechnical University

基　　金：国家自然科学基金(61571368)资助

摘　　要：区域电磁环境中各种电磁干扰辐射信号种类繁多、调制体制各异,信号参数的动态变化,传播路径及其相应影响的不确定性,表现为电磁信号在时间、能量上相互干扰发生异常变化造成电磁环境动态性异常激烈,导致区域内接受设备系统性能下降。针对这一问题,提出基于分形理论与数学形态学相结合的方法,研究区域电磁环境动态特征,利用分形维数表征电磁环境动态性。首先,基于信号基础理论对区域接收点处电磁信号的集合进行建模;其次,利用数学形态学滤波原理对接收的电磁信号集合进行交替滤波,滤除电磁信号中的脉冲噪声和白噪声;最后,运用分形理论求解电磁环境接收点集合的关联维数,并对计算结果进行仿真分析,表明该方法能从时间、空间和能量上为电磁环境的动态性提供有利支撑。A novel scale indicator calculation method is introduced based on fractal theory in order to solve the problem of too much subjectivity, different modulation system, various of electromagnetic signals and great calcula-tion difficulty in indicator extraction by using conventional electromagnetic environment measurement method. Pro-posed fractal theory and mathematical morphology theory is applied on the region of the electromagnetic environment to characterize the complexity of standard. First, we use basic principle of the area signal combining several radia-tion sources to model the receiving electromagnetic signals synthesized at one point, the fractal dimension calculation method based on mathematical morphology is investigated, and then applied to calculating the electro-magnetic environment complexity index. The calculation results indicate that this method can provide favorable in-formation to distinguish the complexity of region of the electromagnetic environment in both space and time.

关 键 词：电磁环境 数学形态学 动态性 分形理论 分形维数 

分 类 号：TN03[电子电信—物理电子学]