| 基于TDS-OFDM技术的中压电力线数字视频传输实验 |
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| 引用本文： | 宋健,刘海涛,潘长勇,赵丙镇,吴青,李晓,杨知行. 基于TDS-OFDM技术的中压电力线数字视频传输实验[J]. 电力系统通信, 2007, 28(8): 4-7 |
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| 作者姓名： | 宋健 刘海涛 潘长勇 赵丙镇 吴青 李晓 杨知行 |
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| 作者单位： | 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 |
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| 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。
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| 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 |
| 文章编号： | 1005-7641（2007）08-0004-04 |
| 修稿时间： | 2007-06-08 |
Trial of digital video transmission over medium-voltage power line with TDS-OFDM technology |
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| SONG Jian,LIU Hai-tao,PAN Chang-yong,ZHAO Bing-zhen,WU Qing,LI Xiao,YANG Zhi-xing. Trial of digital video transmission over medium-voltage power line with TDS-OFDM technology[J]. Telecommunications for Electric Power System, 2007, 28(8): 4-7 |
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| Authors: | SONG Jian LIU Hai-tao PAN Chang-yong ZHAO Bing-zhen WU Qing LI Xiao YANG Zhi-xing |
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| Affiliation: | 1. Tsinghua University, Beijing 100084,China; 2. Beijing ECOM Communications Technology Co., Ltd. ,Beijing 100037,China;frequency division duplex |
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| Abstract: | 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. |
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| Keywords: | Power Line Communication(PLC) Time-Domain Synchronous Orthogonal Frequency Division Multiplexing(TDS-OFDM) Digital Multimedia Broadcasting-Terrestrial(DMB-T) |
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