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该文提出一种多输入多输出(multi-input multi-output,MIMO)宽带电力线载波通信(power line communications,PLC)信道混合模型。该模型结合电力线载波通信信道自上而下和自下而上两种建模方法,考虑了多输入多输出载波信道的空间相关性,提供一种不需要完整载波网络拓扑信息和测量数据的先验电力线信道建模方法。给出了低压室内电力线载波通信信道模型算例,分析了算例在2~30MHz和2~100MHz两种带宽下的信道特征和参数,并与已有模型进行了对比。结果表明,在同等条件下该文模型与已有模型仿真结果一致,但克服了需要获得大量负载阻抗信息或大量测量数据建模的困难,为多输入多输出电力线载波通信提供了一种具有实用价值的仿真分析方法,对于简化多输入多输出电力线载波信道的研究、设计和工程应用具有重要意义。
In this paper, a multi-input multi-output (MIMO) wideband power line communications (PLC) channel hybrid model is proposed. This model combines the top-down and bottom-up modeling methods of powerline carrier communication channel, considers the spatial correlation of multiple-input multiple-output carrier channel, and provides a model that does not require the complete carrier network topology information and measurement data Verify power line channel modeling method. An example of low-voltage indoor power line carrier communication channel model is given. The channel characteristics and parameters of the example in 2 ~ 30MHz and 2 ~ 100MHz bandwidth are analyzed and compared with the existing models. The results show that under the same conditions, the proposed model is consistent with the existing simulation results. However, it overcomes the difficulties of obtaining a large amount of load impedance information or modeling a large number of measurement data and provides a practical The value of the simulation analysis method, for simplifying the multi-input multi-output power line carrier channel research, design and engineering applications is of great significance.