基于共频带传输的卫星通信系统 功率控制仿真分析

Research on Power Control in System of Satellite Communication Base on Common Frequency Transmission

摘要:

对基于共频带传输的卫星通信系统的功率控制进行了研究,比较了不同种类的卫星、转发器、通信频段的特点,搭载Ku频段或C频段同步卫星的透明卫星转发器可以进行共频带通信；仿真分析了降雨对系统上下行链路的影响,天线口径越大,受下行雨衰影响越小；分析了传统功率控制方法不适用于基于共频带传输卫星通信系统；通过链路计算及推导,设计了通过控制系统上行链路信噪比的方法,限制共频带通信信号占用卫星的最大功率；系统链路建立后,利用闭环功率控制,补偿上下行链路雨衰；前向链路和返向链路独立进行功率控制,完成整个系统的功率控制。

Abstract:

Research on power control in system of satellite communication base on common frequency transmission,compared the characteristics of statellite,transponder, band of communication,the geostationary satellites with transparent transponders of Ku band and C band can be used for common frequency communication;the simulation and analysis of rain attention effect on up link and down link of system,the antenna aperture is bigger,the effect of rain attention is smaller; the analysis of the traditional power control not applicable to common frequency transmission is carried; through link calculation and derivation, designed a method to control the uplink signal-to-noise ratio of the system,limiting the occupancy of satellite maximum power of common frequnce communicataion signals;after establishing the system link, utilizing closed-loop power control,compensating for rain attenuation in uplink and downlink; by independent power control for forward and reverse links, the power control of the entire system is completed.