基于射线跟踪的车联网毫米波信道准平稳区间研究  

Quasi-stationary regions of millimeter-wave channel for vehicular networks based on ray tracing

作　　者：崔壮壮 钟章队[1,2] 官科 何丹萍[1,2] 

机构地区：[1]北京交通大学轨道交通控制与安全国家重点实验室,北京100044 [2]北京市高速铁路宽带移动通信工程技术研究中心,北京100044

出　　处：《电波科学学报》2017年第5期570-577,共8页Chinese Journal of Radio Science

基　　金：国家自然科学基金(U1334202;61501021);中央高校基本科研业务费专项资金(2016JBM075);轨道交通控制与安全国家重点实验室自主课题(RCS2017ZZ004;RCS2017ZT008)

摘　　要：针对28GHz车联网中车对基础设施(Vehicle-to-Infrastructure,V2I)毫米波信道,开展了准平稳区间的研究.首先,分析了信道准平稳区间的理论基础和计算方法.其次,利用功率相关(Correlation of Power,CP)算法和谱散度(Spectral Divergence,SD)算法进行准平稳区间的计算.结果表明,CP算法复杂度低且精度较高,更适合用于计算V2I通信场景下的准平稳区间.最后,利用CP算法计算出的准平稳区间作为新的采样间隔,从而减少了射线跟踪仿真器的采样点数.通过原始采样和减少采样点后的信道特性的比较,在合理的门限值下,利用信道准平稳区间的方法加速了射线跟踪仿真器,并且不会造成信道参数的失真.另外,对于信道特性的分析结果也对车联网在毫米波频段的仿真和设计具有重要意义.For the 28 GHz millimeter-wave （mmWave） channel of the vehicle-to-infrastructure （V2I） in vehicular networks, we carried out a research on the channel quasi-stationary region. First, we analyzed the theoretical basis and calculation method of the quasi-stationary region. Second, the calculation of quasi-stationary region was carried out by using the correlation of power （CP） algorithm and spectral divergence （SD） algorithm. The results show the CP algorithm has low complexity and high precision, thus,it is more suitable to calculate the quasi-stationary region in the V2I communication scenario. Last, by using the CP algorithm, the results of the quasi-stationary regions were used for the new sampling intervals. Therefore, the number of sampling points of the ray tracing simulator can be reduced. Through the comparisons of channel characteristics in two simulations between original sampling number and reduced number show that, in reasonable thresholds for CP algorithm, the ray-tracing simulation can speed up, which can guarantee the accuracy of channel parameters. In addition, the results of analysis on channel characteristics will be beneficial for the simulation and design of vehicular networks at mmWave band.

关 键 词：毫米波 车联网 V2I信道 CP算法 SD算法 射线跟踪 

分 类 号：TN911[电子电信—通信与信息系统]