230MHz电力无线通信信号在高层居民楼电竖井中的传播特性研究

针对授权的电力系统230 MHz频段,对高层居民楼电竖井内无线传播信道特性进行研究。在仿真软件中建立应用场景模型,提出射线追踪与室内几何散射模型相结合的方法,对无线信号传播路径、到达角、信号强度等进行仿真计算,分析无线信号通过不同数量楼层时的传播特性,并在实际居民楼中对无线信号传播特性进行试验。对比结果表明,仿真结果与实测结果具有很强的关联性,每层楼平均传播衰减8 d B,最大均方根时延扩展17.28 ns。传播特性研究结果为在高层居民楼电竖井中部署230 MHz电力无线通信网络并进行网络性能优化提供了参考。

Propagation Characteristics of 230MHz Power Wireless Communication Signal in Electric Well of Residential Buildings

The characteristic of signal propagation in electric well of residential buildings is researched based on 230MHz authorized wireless spectrum for power grid corporation in China. A model of application is established in simulation software. The signal propagation is simulated with the method of ray tracing and geometric scattering model. The propagating characteristic is analysised with the calculated propagation parameters in different floors, such as transmission path, arrival angle, and signal strength. A practical testing Is conducted in the electric well of residential building. The calculation result and the actual measuring result have strong correlation. The average attenuation for each floor propagation is about 8dB. The maximal root-mean-squared delay spread is about 17.28ns. The results of simulation and measurement can both provide reference for installation and improvement of the intelligent meters and concentrator in electric well of the residential buildings.