【作者】 叶君；

【导师】 张钦宇；

【作者基本信息】 哈尔滨工业大学 ， 通信与信息系统， 2008， 硕士

【摘要】 超宽带(UWB)通信方式是用极窄脉冲来传输数据比特,同时产生宽达数GHz的带宽,其传输速率高达至每秒500M甚至更高。但因发射功率受到限制,使其传播的有效距离一般在10米范围之内,其主要用途为室内短距离高速率数据传输。本文首先讨论了本课题采用的射线跟踪这一电波传播覆盖预测方法,包括传统射线跟踪的基本原理和分类、UWB室内信道的特殊性、传统射线跟踪法是否适用于UWB信号在室内信道中的传播覆盖预测,并对UWB室内信道确定模型的研究现状作了分析和总结。然后,重点给出了基于室内一般遮挡环境的绕射(包括一次绕射、一次绕射加一次反射、一次反射加一次绕射)射线跟踪及场计算的算法、程序流程以及仿真结果。最后,介绍了我们建立的UWB室内电波传播仿真系统,包括图形用户界面(GUI)系统和该仿真系统所采用的室内信道确定模型,并对该系统尚存的缺陷以及实际应用价值做了分析。本文主要的工作是在已经完成的UWB电波在室内视距环境和室内完全遮挡环境下的传播覆盖预测模型的基础上,建立了基于室内一般遮挡环境的UWB电波传播仿真系统,并加入了绕射射线的射线跟踪和场计算的算法,给出了包括绕射射线在内的各种类型的UWB射线在室内一般遮挡环境下的传播覆盖预测仿真结果。更多还原

【Abstract】 Ultra Wide Band communication pattern uses ultra narrow pulse to transport data bit and forms a bandwidth about several GHz at the same time. Its transmission speed can reach 500M/s or even higher. Its available transmission area is confined in the range less than 10 meters due to the limitation of the transmission power. So it is mainly used for indoor speed data transmission.This paper first discusses one of the electric wave propagation cover prediction methods, ray tracing, which is used by this project, whose content includes the basic theory and categories of traditional ray tracing method and the particularity of Ultra Wide Band indoor channel. It also analyzes whether the traditional ray tracing method is suitable for UWB signal’s propagation cover prediction under indoor circumstances, and it makes analysis and summarization of the current research situation about UWB indoor established channel models as well. Then, it provides arithmetic, flow of program and simulation results of ray tracing and field computing for many different kinds of UWB rays under a general obstructed indoor circumstance, especially for the diffraction rays. At last, it introduces the UWB radio wave simulation system that we built, including the introduction of the Graphical User Interface (GUI) system and the indoor established channel model which this simulation system uses. And it offers the analysis of the shortages and practical application value of it in the end.The main work of this project is building a simulation system for UWB radio wave propagation under general obstructed indoor circumstances based on the previous work named UWB radio wave propagation cover prediction models under the unobstructed indoor circumstances and completely obstructed indoor circumstances respectively which have been done. Aside from this, it offers the arithmetic of ray tracing method and field computing for diffraction rays. At last, it provides the simulation results of many different kinds of UWB rays under the general obstructed indoor circumstances.更多还原