| 基于OFDM的数字电视地面广播传输系统 |
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| 引用本文： | 朱正为.基于OFDM的数字电视地面广播传输系统[J].兵工自动化,2004,23(4):56-58. |
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| 作者姓名： | 朱正为 |
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| 作者单位： | 西南科技大学,信息与控制工程学院,四川,绵阳,621010 |
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| 摘 要： | 基于OFDM的数字电视传输系统由纠错处理和数字调制等组成.采用数据加扰技术使输入的高码率串行数据流与8bit伪随机序列进行模2加.对加扰后的数据字节进行纠错编码和数据交织,再经串/并转换均匀分散成N路.N路符号分别对N个子载波调制,得到FDM信号.最后进行并/串、D/A及模拟处理,形成中频信号,通过发射机调制到高频载波上实现发送传输.
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| 关 键 词： | 数字电视 数字传输 OFDM调制 OFDM 数字调制 电视地面广播 传输系统 Based Transmission System Terrestrial 高频载波 子载波调制 发射机 中频信号 模拟处理 符号 均匀分散 转换 数据交织 纠错编码 伪随机序列 数据流 高码率 |
| 文章编号： | 1006-1576(2004)04-0056-03 |
| 修稿时间： | 2004年2月24日 |
Digital Television Terrestrial Transmission System Based on OFDM |
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| ZHU Zheng-wei.Digital Television Terrestrial Transmission System Based on OFDM[J].Ordnance Industry Automation,2004,23(4):56-58. |
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| Authors: | ZHU Zheng-wei |
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| Abstract: | Digital television transmission system based on the OFDM consists of Error correction processing and digital modulation parts etc. Firstly, adopting the technique of data adding interference, make string data stream inputted at a high bit rate and false random preface to add in row mold 2. Error correction coding and data intertexture for data bytes added interference were taken, and then it was divided average into N paths by string-parallel conversion. N son-carrier waves were modulated respectively with N paths symbol and got FDM signal. Finally, parallel-string, D/A conversion and analog processing was put up to form IF signal, IF signal modulated was modulated over the high frequency carriers to send out by transmitter. |
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| Keywords: | Digital television Digital transmission Orthogonal Frequency Division Multiplexing (OFDM) |
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