智能电网双层无线接入架构及信道仿真研究

摘要

电力通信网络的架构及无线信道特性是决定网络性能的关键因素.首先,研究基于南方电网电力无线宽带专网的双层无线接入架构,该架构中宏蜂窝与汇聚网关之间的MIMO信道的性能将直接影响到电网的稳定和运营水平.因此,对MIMO信道性能的研究就尤为重要.主要对MIMO信道的两个典型模型WINNERⅡ模型和Kronecker模型分别从信道空间相关性、信道容量、时域衰落三方面进行理论分析与对比仿真.由仿真结果得到天线数量、信噪比、天线阵列等因素对信道容量和天线相关性的影响.仿真结果说明MIMO技术能够在电网多业务承载环境下,满足系统高速率、大容量的要求.通过比较,WINNERⅡ模型与真实传播环境匹配度高,可在双层无线接入架构中得到进一步的应用.%The architecture of the electric power communication network and characteristics of the wireless channel are the key factors to determine the network performance. The double-layer wireless access architecture of the electric power wireless broadband private network of Southern Power Grid is studied,in which the MIMO channel performance of macrocell and conver-gence gateway directly affects the stability and operational level of the power grid. Therefore,it is particularly importance to research on the performance of MIMO channel. The typical WINNERⅡ model and Kronecker model of MIMO channel are performed with theoretical analysis and contrast simulation in the aspects of channel space correlation,channel capacity and time-domain fading. The influences of antennas quantity,signal-to-noise ratio and antennas array on channel capacity and antennas correlation are obtained with simulation results. The simulation results show that the MIMO technology can satisfy the require-ment of the system for high speed and large capacity. In comparison with the Kronecker model,the WINNERⅡ model has higher matching degree with the real propagation environment,and can be further applied in the double-layer wireless access architecture.