摘要
通过对用电信息采集系统常用的本地通信方案的弊端分析,提出了一种基于OFDM的宽带载波和无线双模通信系统,并对基带物理层和模拟前端电路的结构进行了详细阐述,最后基于电力线信道和无线信道的特性,对双模通信系统的信噪比进行了详细分析,并通过理论推算说明了在电力线信道信噪比较差的情况下,无线信道对提升整体通信性能具有很大的实用价值。
With the analysis the shortcomings of local communication scheme for electricity information collection, this paper proposes a broadband carrier and wireless dual-mode communication system using OFDM modulation. Meanwhile the structure of baseband physical layer and analog front-end circuit are introduced in detail. Finally, based on the analysis of the characteristics of power line channel and wireless channel, SNR（signal-to-noise ratio） of dual-mode wireless communication is calculated. The theoretical calculation shows when the SNR of power line channel is below zero, the wireless channel can improve the system performance obviously.
出处
《电力信息与通信技术》
2015年第5期63-66,共4页
Electric Power Information and Communication Technology
关键词
双模
宽带载波
用电信息采集
OFDM
通信系统
dual-mode
broadband communication
electricity information collection
OFDM
communication system
