| 基于DVB-T标准的数字电视回波对消技术的研究 |
| |
| 引用本文： | 张福洪,徐子春,戴绍港.基于DVB-T标准的数字电视回波对消技术的研究[J].电子器件,2009,32(6):1003-1006. |
| |
| 作者姓名： | 张福洪 徐子春 戴绍港 |
| |
| 作者单位： | 杭州电子科技大学通信工程学院,杭州,310018 |
| |
| 摘 要： | 以数字电视地面广播国家标准DVB-T为基础,提出了一种基于FPGA和DSP实现回波对消的方案.其原理是:首先该系统不发送数字电视信号,通过发射CAZAC序列进行信道初估计.由于信道在实际中会发生一定的变化,所以还需要用自适应算法进行信道特性的跟踪,其中DSP运用自适应算法保证对消信号接近回波信号.其次FPGA系统获得了回波信道的参数并生成逼近回波信号的对消信号.最后,将接收信号与对消信号相减完成对消.提出了对回波信道的初估计并利用变换域LMS算法进行信道跟踪的一种方案.最后仿真结果表明,该方法具有良好的回波对消性能.
|
| 关 键 词： | 变换域LMS算法 回波对消 |
The Research of Echo Cancellation Technology Based on DVB-T Standard for Digital TV |
| |
| ZHANG Fuhong,XU Zichun,DAI Shaogang.The Research of Echo Cancellation Technology Based on DVB-T Standard for Digital TV[J].Journal of Electron Devices,2009,32(6):1003-1006. |
| |
| Authors: | ZHANG Fuhong XU Zichun DAI Shaogang |
| |
| Affiliation: | ZHANG Fuhong*,XU Zichun,DAI ShaogangSchool of Communication Engineering,Hangzhou Dianzi University,Hangzhou 310018,China |
| |
| Abstract: | The article talks about an echo cancellation technology based on DVB-T standard for digital TV repeater by using FPGA and DSP platform.The principle of echo cancellation can be expressed as follows.First,the channel is estimated by transmitting CAZAC sequence,not transmitting digital TV signal at that time.It is needed to track channel by using adaptive algorithm because of the change of channel.It is DSP system that run adaptive algorithm to make the cancellation signals get close to the echo signals.And t... |
| |
| Keywords: | DVB-T FPGA DSP CAZAC |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《电子器件》浏览原始摘要信息 |
|
点击此处可从《电子器件》下载全文 |
|
