HDTV地面广播传输中的多载波(OFDM/COFDM)调制方案  

作　　者：李栋[1] 余兆明[1] 

机构地区：[1]南京邮电学院信息工程系,江苏南京210003

出　　处：《电视技术》2003年第8期4-5,8,共3页Video Engineering

摘　　要：介绍了在QPSK-OFDM传输试验中,在DTT中采用OFDM,对移动信源不必采用跟踪的定向天线,取而代之的是非定向天线和较少的接收基站就可以在多径环境中取得优良的性能。OFDM调制方案可以改善移动信源电视广播传播的操作,并在大规模传播中简化中继网络。In this paper,In the transmission experiments with the QPSK-OFDM modem,applying the OFDM modem for DTT from mobile source,tracking antenna is not necessary be cause a non-directional antenna is used,and the number of re-ceiving stations can be reduced because of excellent performance in multi-path environments.I t can be expected to improve the operation of live-TV transmission from mobile sources and to simplify the relay networks for the large-scale transmission.

关 键 词：HDTV 地面广播传输 多载波调制 正交频分复用 编码正交频分复用 高清晰度电视 OFDM/COFDM 

分 类 号：TN943[电子电信—信号与信息处理] TN949.197[电子电信—信息与通信工程]