地面数字电视覆盖典型场景及方案设计

Scheme Design and Typical Scene of DTTV Coverage

地面数字电视网络是通过电视塔、台的制高点天线发射无线电波,覆盖电视用户,用户通过接收天线和电视机收看电视节目。地面数字电视网络相对模拟电视对信号覆盖范围和连续性要求更高。地面数字电视发射机覆盖网络一定会产生信号盲区和弱区,播出机构需要对这些区域进行地面数字电视信号覆盖或增强,使网络运行更加经济可靠,网络和服务质量更高,使现有无线资源获得最佳经济效益。本文结合实际情况,针对不同区域的特点,提出室外覆盖场景分类,并分析通过不同技术手段进行覆盖的解决方案。

Digital terrestrial television network transmits TV signals by television tower. Digital terrestrial TV network has higher demands of signal coverage and continuity comparing with analog TV. Digital terrestrial TV transmitter network will have blind and weak signal area. Broadcasters need re-coverage or enhance signals in these areas to make the network more economical and reliable and provide services with higher quality. Thus, the existing wireless resources can obtain the best economic benefit. Considering the characteristics of different regions, the paper proposes the classification of outdoor coverage scenes and puts forward coverage solutions by different technologies.