论文部分内容阅读
通CMMB(中国移动多媒体广播)信号在覆盖时,受到各种的地理环境和其他因素的影响,出现CMMB弱信号区和盲区,特别是室内弱覆盖区域十分明显。此时如果通过建设CMMB电视发射台来解决室内分布不均匀的弱信号和盲区现象,覆盖效果并不是很理想,而且施工难度和工作量大,工程造价也非常高。为解决这种大面积分散的弱信号和信号盲区,最好的方法是采用室内分布系统和直放站的方式进行系统组网覆盖。介绍了CMMB网络系统设计的整体思想和一般过程。
Through the CMMB (China Mobile Multimedia Broadcasting) signal coverage, subject to a variety of geographical and other factors, there CMMB weak signal area and blind spots, especially indoor weak coverage area is very obvious. At this moment, if the CMMB TV transmitting station is used to solve the unevenly distributed indoor weak signals and blind spots, the coverage effect is not very satisfactory, and the construction difficulty and workload are heavy, and the construction cost is also very high. To solve this large area of scattered weak signals and signal blind spots, the best way is to use the indoor distribution system and repeater system for network coverage. The whole idea and general process of CMMB network system design are introduced.