三区分划射线追踪法研究及其应用  

The Study on the Three Zoning Treatment Ray Tracing Method and Its Application

作　　者：种衍文[1] 江柳[2] 黄天锡[1] 

机构地区：[1]武汉大学电子信息学院 [2]武汉大学计算机学院,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2003年第5期663-666,共4页Journal of Wuhan University:Natural Science Edition

基　　金：武汉大学科研启动基金资助项目(502273010)

摘　　要：根据高频(HF)信道的特点和要求,对三区分划射线追踪法的精度进行了深入分析,结果表明三区分划射线追踪法可用于HF信道的模拟研究.提出并实现了利用三区分划射线追踪法替代Vogler法信道模拟中的射线参数理论求解部分,解决了Vogler方法在HF信道模拟应用中存在的适用范围窄等问题.通过与Vogler模拟方法的比较,散射函数的形状完全一样,而且可以得到利用Vogler方法无法确定的射线的入射角等有用信息,从而验证了本文方法的正确性和优越性.Starting from the vector ray equation, according to the smoothness of the variation of the refraction angle and the group path of the ray, a ray path is divided into three zones, which are the smooth zone, the minimal dielectric constant zone and the inflexion zone of the changing speed of the dielectric constant. Thus the three zoning treatment method is put forward. In the case of the smoothness of the ray is destroyed at the inflexion zone and the minimal dielectric constant zone, the special treatment is needed. On the basis of existing Vogler HF channel model, one theoretical HF channel simulation and one ray tracing HF channel simulation have been developed. During the ray tracing HF channel simulation the three zoning treatment method is adapted to calculate the ray's group delay and incidence angle. This model can be applied to the narrow band or wideband HF channel with all kinds of spherically stratified ionospheric profiles and the results' coherence with the Vogler model and merit are described in this paper.

关 键 词：高频电波传播 三区分划射线追踪法 高频信道 电离层模型 电磁波 Vogler法 

分 类 号：TN011.2[电子电信—物理电子学]