基于TDS-OFDM技术的中压电力线数字视频传输实验  

Trial of digital video transmission over medium-voltage power line with TDS-OFDM technology

作　　者：宋健[1] 刘海涛 潘长勇[1] 赵丙镇 吴青[1] 李晓 杨知行 

机构地区：[1]清华大学,北京100084 [2]北京意科通信技术有限责任公司,北京100037

出　　处：《电力系统通信》2007年第8期4-7,共4页Telecommunications for Electric Power System

摘　　要：文章介绍了使用地面数字多媒体广播DMB-T系统在10 kV中压电缆上成功进行双向(频分复用)数字视频传输实验的情况。时域同步正交频分复用(TDS-OFDM)调制技术作为DMB-T的核心技术,被中国数字地面电视广播标准所采用,实验证实了该技术应用于电力线通信的可行性。TDS-OFDM使用伪随机序列作为保护间隔或者帧头,同时满足同步和信道估计的需要,避免了在OFDM符号中使用训练符号或者导频信号所带来的开销,提供了更高的频谱效率。This paper introduces the trial of two-way （frequency division duplex） digital video transmission over 10 kV medium-voltage power cables which use Digital Multimedia Broadcast-Terrestrial （DMB-T） system. In this system, TDS-OFDM is a core technology which is adopted as a standard in Chinese Digital Terrestrial Television Broadcasting. The trial has proved the feasibility of applying TDS-OFDM technology to power line communication. By using pseudo random sequence as the guard interval （or frame header） , TDS-OFDM technology meets the need of synchronization and channel estimation. It also avoids the overhead of putting either training symbols or pilots in OFDM symbol, so higher spectrum efficiency has been obtained.

关 键 词：电力线通信 时域同步正交频分复用 地面数字多媒体广播 

分 类 号：TN915.853[电子电信—通信与信息系统]