基于卫星分发链路的数字电视单频网关键技术  

SFN Structure Based on Satellite Distribution Links for Digital Terrestrial Television Broadcasting Systems

作　　者：张超[1] 李锦文[2] 高鹏[2] 潘长勇[1,3] 李薰春[2] 戚武[2] 杨昉[1] 

机构地区：[1]清华大学电子工程系清华信息科学与技术国家实验室,北京100084 [2]国家新闻出版广电总局广播科学研究院,北京100866 [3]数字电视国家工程实验室(北京),北京100191

出　　处：《电视技术》2015年第16期87-91,共5页Video Engineering

基　　金：质检公益性行业科研专项经费资助项目;科技部科技伙伴计划资助项目

摘　　要：提出了基于卫星分发链路的地面数字电视单频网的组网方案。该方案利用了卫星链路的转发优势,节目分发链路不受地域差异化条件的限制,不需要单独架设专用有线分发网络,转发延时分布均匀,特别适于在复杂环境下构建大范围的单频网。详细阐述了基于卫星分发链路的地面数字电视单频网的网络结构、特点与关键技术。实验室测试和开路测试结果均表明该方案的可行性和有效性。In this paper, a novel SFN structure based on satellite distribution networks is proposed. The satellite link will not be re- stricted by different geographical conditions without dedicated wired distribution networks. The transmission delay of the satellite link is distributed uniformly for different locations which can greatly simplify the network planning. Therefore, it is suitable for con- structing national wide or large area DTI＇B SFN under complicated environments. Laboratory tests and field trials indicate that the proposed scheme can support practical DTI＇B applications.

关 键 词：地面数字电视 单频网 卫星链路 

分 类 号：TN94[电子电信—信号与信息处理]