摘要
首先推导了单频网中两个相邻发射台站最高覆盖效率下,台站间距和覆盖半径的约束关系,然后以中国移动多媒体广播CMMB技术体制作为研究平台,根据国际电联推荐的电压推导法推算出其高速移动时的最小中值场强,最后根据地形地貌等因素确定电波传播模型,继而推算出单频网中两个发射台站在保护间隔内最高覆盖效率下发射台站ERP、高度和台站间距的约束关系。
The constraint relation of coverage radius and distance of two adjacent transmitter stations is calculated firstly on the basis of their highest coverage efficiency in SFN in this paper. Then, China Mobile Multimedia Broadcasting （CMMB） technical system is used as research platform, and its minimum median field strength in mobile reception is worked out according to the voltage derivation method recommended by the ITU. Finally, the radio propagation prediction method is chose based on geographic and geomorphic conditions, and then the constraint relation of two transmitter stations＇ ERP, height and the distance between two adjacent transmitter stations is deduced.
出处
《电视技术》
北大核心
2013年第10期77-80,共4页
Video Engineering
关键词
有效辐射功率
相邻台站间距
发射台站高度
约束关系
ERP
distance between two adjacent transmitter stations
height of transmitter station
constraint relation
