宽带MIMO-PLC随机参数信道建模与特性

发布时间：2018-02-22 04:28

本文关键词： 宽带多输入多输出多导体电力线载波通信随机参数信道　出处：《电网技术》2017年03期 　论文类型：期刊论文

【摘要】：为研究宽带多输入多输出(multi-input multi-output,MIMO)电力线通信(power line communications,PLC)信道的随机特性,提出了一种基于多导体的MIMO-PLC随机参数信道模型。在建模过程中利用统计分布来表征信道的物理参数,比较分析了参数随机且分支不同的MIMO-PLC宽带信道特征。结果表明,平均信道增益(average channel gain,ACG)服从正态分布,均方根时延扩展(root mean square delay spread,RMS-DS)服从对数正态分布,相干带宽(coherent bandwidth,CB)和均方根时延扩展成反比;分支数越多信道频率选择性衰落和RMS-DS越大,ACG、CB和信道容量越小;与单输入单输出(single-input single-output,SISO)PLC信道相比,MIMO信道的信道容量有较大提升。提出的随机参数模型为MIMO-PLC提供了一种具有实用价值的建模方法,该模型对在复杂环境下MIMO-PLC系统的研究、设计以及工程应用具有重要的指导意义。
[Abstract]:In order to study the stochastic characteristics of wideband multi-input multi-output multi-input multi-output (Mimo) power line communication systems (PLCs) channel, a MIMO-PLC stochastic parameter channel model based on multi-conductors is proposed. In the process of modeling, the physical parameters of the channel are represented by statistical distribution. The characteristics of MIMO-PLC wideband channels with random parameters and different branches are compared and analyzed. The results show that the average channel gain and the root mean square delay spreading mean square delay spread RMS-DSs follow the normal distribution, respectively, and the results show that the average channel gain is obtained from the normal distribution, and the RMS-DSs from the RMS-DSs are obtained from the RMS-DSs. Coherent bandwidth is inversely proportional to root mean square (RMS) delay spread. The more the number of branches, the more the channel frequency selective fading and the larger the RMS-DS, the smaller the channel capacity. Compared with single-input single-output SISO PLC channel, the channel capacity of MIMO-PLC channel is greatly improved. The proposed stochastic parameter model provides a practical modeling method for MIMO-PLC, which studies the MIMO-PLC system in complex environment. Design and engineering application have important guiding significance.
【作者单位】：华北电力大学电气与电子工程学院;
【基金】：国家自然科学基金项目(61172075) 中央高校基本科研业务费专项资金项目(2014XS78)~~
【分类号】：TM73;TN919.3

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