共查询到10条相似文献,搜索用时 62 毫秒
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针对航空通信中由于复杂地形环境引入的多径影响,介绍了一种基于射线追踪法的多径信道建模与仿真的方法。 Wireless Insite 是一种基于射线追踪法的无线信道仿真软件,采用该软件,以实际项目为例,对多径信道建模与仿真的方法进行了详细介绍,并对仿真结果进行了分析。仿真结果表明了提出的建模仿真方法用于分析航空飞行器多径效应的有效性。 相似文献
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基于三维射线跟踪模型的电波传播预测研究 总被引:1,自引:0,他引:1
电波传播预测在现代无线通信系统中扮演着极其重要的角色,精确预测电波传播路径损耗为合理的微蜂窝无线网络规划、设计提供了必要条件。首先介绍了利用射线跟踪技术这种确定性的分析方法预测无线电波传播的理论基础和基本思想,接着详细论述了几种常用的射线跟踪方法,并对他们做了简单的比较,随后介绍了射线跟踪加速技术中的空间分区技术,最后展望了采来要解决的问题和发展方向。 相似文献
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本文探讨了自然界广泛存在的时变效应的模拟问题,实现了一种基于射线追踪方法的时变效应渲染方法.该方法使用Surfels技术对模型表面进行重构和设置属性值,从射线源发射出相应属性值的射线,当射线碰撞到模型表面时将射线属性和模型表面元素属性交换.根据模型表面元素值,选取适当的纹理通过相应的纹理技术进行纹理映射,实现模型表面再次渲染,使模型实现时变效应.针对建筑物场景的实验结果验证了该方法的正确性. 相似文献
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In 5G era,it is expected to achieve wireless network coverage including offshore areas.Modeling of marine wireless channels is the basis of constructing a marine communication system.In this paper,a communication scene between an unmanned aerial vehicle(UAV)and a boat is simulated to study the marine wireless channel.Firstly,an improved spatial partitioning ray tracing algorithm is proposed to track the propagation path of electromagnetic waves at sea surface.Secondly,a mobile channel is simulated and modeled based on the track results.Finally,a loss measurement is carried out in the coastal waters based on the simple wireless channel loss measuring platform,and a path loss propagation model is built.Then we compare the actual measurement data with the simulation results and find that the two are have good consistency,which further verifies the reliability of the simulation. 相似文献
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Myung‐Sun Choi Han‐Kyu Park Youn‐Hyoung Heo Sang‐Hoon Oh Noh‐Hoon Myung 《ETRI Journal》2006,28(2):247-249
In the development of a new wireless communications system, a versatile and accurate radio channel for indoor communications is needed. In particular, the investigation of radio transmission into buildings is very important. In this letter, we present an improved three‐dimensional electromagnetic wave propagation prediction model for indoor wireless communications that takes into consideration building penetration loss. A ray tracing technique based on an image method is also employed in this study. Three‐dimensional models can predict any complex indoor environment composed of arbitrarily shaped walls. A speed‐up algorithm, which is a modified deterministic ray tube method, is also introduced for efficient prediction and computation. 相似文献
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在高性能计算机上,研究基于不同编译器的三维短波射线追踪计算.通过对三维短波射线追踪计算的分析,设计和实现了三维短波射线追踪串行计算软件和并行计算软件,分别在GCC编译器和PGI编译器中编译生成可执行文件,基于PGI编译器的运行时间明显优于基于GCC编译器的运行时间. 相似文献