摘要
主要研究和探讨了毫米波在圆形截面的弯曲隧道中,由于反射和绕射的存在,对其传输特性的影响;然后针对在直隧道中,没有绕射存在的情况,将此时的传输特性进行了对比。本文的研究方法主要是将高斯波束的谱特性、射线跟踪法(RT)和一致性劈绕射理论(UTD)结合起来,得到了接收功率、时延扩展和路径损耗等传输特性参数的理论模型。运用MATLAB进行仿真,比较了不同隧道曲率半径和不同频率下的路径损耗,以及在同一频率不同隧道曲率半径下和同一隧道曲率半径和不同频率下的时延扩展。最后,针对这些传输特性得出了相应的结论,为毫米波的隧道研究奠定了一定的理论基础。
This paper mainly focuses on millimeter wave propagation characteristics using Gaussian beams due to diffraction and reflection in the environment in long curved circular tunnels,and then gives the comparison without diffraction in long straight tunnels.And ray tracing method embedded with spectral features of Gaussian beam is used to analyze millimeter wave propagation characteristics in this paper,received power,delay spread and path loss are gee then.Further simulations have been carried out to compare the millimeter wave propagation characteristics in different curved radius and different frequencies,and also in the same frequency of different curved radius and in the same curved radius of different frequencies in the tunnels.Some valuable conclusions are also obtained,which offer the theoretical and practical references for millimeter wave communication.
出处
《电子测量技术》
2012年第3期50-53,共4页
Electronic Measurement Technology
基金
国家自然科学基金面向地下轨道交通的无线信道模型构建与应用(61132003/F010202)
上海大学研究生创新基金(SHUCX112135)资助项目
关键词
毫米波
传输特性
反射
绕射
millimeter wave
propagation characteristics
reflection
diffraction
