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摘要随着通信技术的飞速发展，基于电力线通信的组网技术已经成为通信领域研究的热点。与传统的局域网通信技术如以太网相比，电力线通信具有即插即用、无须重新布设线路以及高数据率的优点。 该文首先探讨了电力线通信的概念，发展的历史和现状，并且研究了电力线信道的特性，分析了其在通信方面的特点，从两个角度建立了电力线信道的模型并进行了仿真,验证了其特性。然后，详细探讨了电力线通信协议 HomePlug 1.0中关于物理层和媒介访问控制层的协议规定，分析了其特点与优势，并且在Linux系统下使用 C++语言搭载了物理层实现框架，其中包括加扰、里德所罗门编码、卷积编码、交织、OFDM 调制、解调、解交织、Viterbi 译码、里德所罗门译码、解扰等模块，并给出了物理层完整的信号处理过程的仿真结果。8958
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关键词 电力线通信 HomePlug 电力线信道 正交频分复用 物理层 媒介访
问控制层 Title The Research on Channel Modeling and Physical Layer
Simulation of Power Line Communication in Local Area Networks
Abstract
With the rapid development of the communication technology, the network
technology based on power line communication has been a hot topic in the
field of communications. Compared with the conventional network
communication technology in local area networks (LANs), i.e, Ethernet,
power line communication has some advantages such as plug and play, no need
to route new wiring and high data rate.
This thesis first discusses the conception, history and current situation
of power line communication, and researches the characteristics of the
power line channel, analyzes its feature in communication, then sets up
power line channel model from two aspects and verifies its characteristics
via simulation. Afterwards, it discusses the regulation about physical
(PHY) layer and medium access control (MAC) layer in power line
communication specification HomePlug 1.0 in detail, analyzes its
characteristics and advantages, and constructs PHY layer simulation
framework via C++ in Linux system, including scrambling, Reed Solomon
coding, convolutional coding, interleaving, OFDM modulation,
demodulation, deinterleaving, Viterbi decoding, Reed Solomon decoding,
descrambling, then the results of data processing through simulation in
PHY layer are given and analyzed.
Keywords power line communication HomePlug power line channel OFDM
PHY MAC 目 次
1 绪论 . 1
1.1 电力线通信的概念 .. 1
1.2 电力线通信的历史 .. 1
1.3 电线通信的发展现状 1
1.4 HomePlug 1.0 标准简介 2
1.5 论文研究内容与章节安排 .. 3
2 电力线信道的建模 . 4
2.1 自顶向下方法分析及仿真 .. 4
2.2 自底向上方法分析及仿真 .. 9
2.3 电力线上的噪声建模分析 . 13
2.4 本章小结 15
3 HomePlug 1.0 物理层分析与仿真 .. 16
3.1 前向纠错（FEC）编码的介绍与分析 . 16
3.2 HomePlug 1.0 中的OFDM 参数分析 24
3.3 物理层仿真 . 26
3.4 本章小结 29
4 HomePlug 1.0 MAC 层的分析 . 30
4.1 MAC 层相关概念 . 30
4.2 CSMA/CA 过程的介绍与分析 33
4.3 本章小结 40
结 论 . 41
致 谢 . 42
参 考 文 献 .. 43
1 绪论
1.1 电力线通信的概念