地面数字电视单载波系统如何实现移动接收  

How Mobile Digital Television Reception Can be Realized in Single Carrier Systems of Digital Terrestrial Television Transmission

作　　者：徐孟侠[1] 

机构地区：[1]北京大学电子学系,北京100871

出　　处：《电视技术》2010年第7期8-12,15,共6页Video Engineering

摘　　要：结合2001年春的私人讨论,介绍了单载波系统实现移动电视接收的关键技术:考虑非专家的主观判据,在系统设计中缩小数据结构;在解调器中,采用过采样相位跟踪技术,合理利用回波或多径信号的能量,并采用非线性处理替代线性处理;对现场测试中实验方法的建议。这些技术的综合应用,不仅在原理上解决了采用单载波系统实现移动电视接收的国际难题,还解决了用单载波技术组建单频网以及固定接收中单载波与多载波如何处置复杂的动态回波的难题。Private discussions on how mobile digital television reception can be realized in SC systems at the spring of 2001 are introduced in this paper： 1） data structure be shortened in system design, based on non-expert subjective criterion, 2） and in the de-modulator： over-sampling phase tracking be adopted, 3） the energy of echo or multi-path signals be reasonably utilized, 4） linear processing be substituted by non-linear processing, as well as, 5） new experimental methods be proposed for field trials. The principles based on multiplexing all these techniques not only solve the critical international issue of how mobile digital television reception can be realized in SC, but also that of the construction of SFN for SC, as well as that of how complex dynamic echo or multi-path issues can managed for fixed reception in both SC and MC.

关 键 词：地面数字电视 单载波系统 多载波系统 单频网 移动电视接收 

分 类 号：TN949.197[电子电信—信号与信息处理]