基于UTD的室外毫米波蜂窝网络传播特性研究

28 GHz毫米波不像60 GHz毫米波那样在大气传播中有额外的衰落，适用于下一代通信技术中室外蜂窝网络的研究. 一致性绕射理论具有预测精度高、计算量小的优点，适用于研究室外蜂窝移动网络中无线电波的传播特性. 基于一致性绕射理论对典型室外微小区的无线网络进行了仿真与分析，通过仿真结果与已知文献实测结果进行比较，一致性良好，验证了该方法的正确性. 同时对28 GHz下基站覆盖、植被覆盖、路径增益、路径损耗的概率分布等电波传播参数作了深入分析，仿真结果可以为5G室外蜂窝移动网络的网络优化提供理论依据.
At the mm-wave bands of 28 GHz，unlike at 60 GHz，atmospheric absorption does not significantly contribute to additional path loss，making it suitable for next generation cellular network outdoor mobile communications. The characteristics of radio wave propagation can be predicted accurately by Uniform Theory of Diffraction. According to its calculation amount which is smaller than those of other methods，it is widely used in studying cellular network. We study a typical urban scene by ray tracing method which based on UTD theory（Uniform Theory of Diffraction）to simulate and analyze its network. By comparing with measured data，we get expected results which verify the feasibility of this method. At the same time，we study the coverage of base station，the coverage of foliage，path gain and probability distribution on path loss. These results can provide optimization of 5G outdoor cellular network with theoretical evidence