数字电视地面传输技术的研究与仿真  

Research and Simulation of Transmission Technology of Digital Television Terrestrial Broadcasting System

作　　者：夏菽兰[1] 

机构地区：[1]盐城工学院实验教学部,江苏盐城224051

出　　处：《盐城工学院学报（自然科学版）》2012年第2期22-26,共5页Journal of Yancheng Institute of Technology:Natural Science Edition

摘　　要：数字视频地面广播(DVB-T)标准是目前广播电视业以及世界上多国数字地面电视接收测试中评价最高的地面电视广播标准,其技术也已经很成熟。DVB-T系统采用了编码正交频分复用(COFDM)技术,离散导频的插入和数据块本身的循环特性,使得信道估计和均衡的算法简单易行,但同时也降低了系统的频谱利用率。针对该系统接收端的信道估计和均衡这两个问题,进行了理论上的研究,并用Matlab进行了仿真,显示了其在多径信道下的性能。DVB - T gets the highest evaluation among all the tested standards of several countries in the broadcasting industry, along with its mature technology. DVB - T system adopts COFDM technology. Both the insert of scattered pilot and the cycle characteristic of data block make the channel estimation and equalization algorithm very easy which this paper will deal with, but meanwhile the pilot reduces the spectrum utilization. The performance of DVB - T in multi - channel will be shown by my simulation using Matlab.

关 键 词：数字视频地面广播 编码正交频分复用 导频 信道估计 均衡 

分 类 号：TN943[电子电信—信号与信息处理]