摘要
由于卫星动中通通常安装于运动载体之上,其通信链路受周围环境的影响显著。当动中通在不同地理位置进行小区域或跨区域通信时,链路参数的变化在很大程度上会影响动中通的通信能力。针对这一问题,通过建立卫星动中通的链路计算数学模型,分析了地理位置变化对卫星动中通链路特性的影响。针对因链路余量不足而产生的通信中断问题,对降低传输速率、改变传输功放和选取高增益天线等方法进行效果比较,根据不同情况提出了相应的解决方法,为卫星动中通在不同地理环境下的链路设计及通信提供技术支撑。
Since the SOTM is usually installed on top of the moving carrier, the communication link affected by the surrounding environment is significant. When the SOTM communicate in geographically small or inter - regional area, the change of link parameters affects the SOTM capabilities largely. To solve this problem, a mathematical model of the SOTM link calculation is established to analyze the effects of changes in location of mobile communications satellite link characteristics. The communication interruption caused by the lack of excess margin is analyzed. Some methods are analyzed and compared, such as reducing the transmission rate, improving the transmission amplifier and selecting high - gain antennas. For different circumstances, the corresponding solutions are put forward, which can provide technical support of the links design and communication for the SOTM in different geographical environments.
出处
《计算机仿真》
北大核心
2017年第2期65-69,共5页
Computer Simulation
