BPLC系统电力网信道容量影响因素研究

J. Anatory, N. Theethayi, R. Thottapillil, N. Mvungi, M. Kissaka
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引用次数: 2

摘要

电力线已被提出作为向最终用户提供宽带服务的解决方案。最近的各种研究已经报道了通道容量随着给定通道类型(室内通道或接入(低压)通道或介质通道)分支数量的增加而减少。然而,这些研究并没有提供关于通道容量如何与沿线分布的分支数量相关的明确见解。本文试图量化和表征通道容量与分支数量的关系以及给定类型通道的不同终端负载的影响。结果表明,当功率谱密度(PSD)在- 90dbm /Hz ~ - 30dbm /Hz之间时,中压信道、低压信道和室内信道的信道容量分别下降20 ~ 30mbps /支路、14 ~ 24mbps /支路和20 ~ 25Mbps/支路。此外,对于这里处理的任何类型的通道,当负载阻抗以特征阻抗终止时,通道容量最小。结果表明,如果使用接地回路而不是相邻导体回路,则通道容量可能会有重大损失。本文的分析有助于设计合适的电力线通信设备,实现更好、更高效的数据传输。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigations of factors influencing the channel capacity of power line network for BPLC systems
Power line has been proposed as a solution to deliver broadband services to end users. Various studies in the recent past have reported the decrease in channel capacity with increase in number of branches for a given channel type (indoor channel or access (low voltage) channel or medium channel). Those studies however did not provide a clear insight as to how the channel capacity is related to the number of distributed branches along the line. This paper attempts to quantify and characterize the effects of channel capacity in relation to number of branches and also with different terminal loads for a given type of channel. It is shown that for power spectral density (PSD) between -90dBm/Hz to -30dBm/Hz, the channel capacity decreases by 20-30Mbps/branch, 14-24Mbps/branch and 20- 25Mbps/branch for medium voltage channel, low voltage channel and indoor channel respectively. In additional, it is shown that the channel capacity is minimum when the load impedance is terminated in characteristic impedances for any type of channel treated here. It is shown that there could be significant loss in channel capacity if a ground return were used instead of adjacent conductor return. The analysis presented in the paper would help in designing appropriate power line communication equipment for better and efficient data transfer.
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