数字信道化多载波卫星通信系统链路可支持性

Link supportability of multi-carrier SATCOM systems based on digital channelizing

为基于数字信道化技术的多载波卫星通信系统提出了一种链路可支持性优化模型。求解该优化模型,可得到各子信道最佳增益和各链路最佳发射功率。该链路可支持性模型最小化卫星转发器输出中的最大载波功率以达到如下目的:尽量缩小转发器中各载波功率的差别,从而将转发器工作点尽可能往饱和点方向移动,提高转发器功率利用率;最小化各终端上行有效全向辐射功率,使尽可能多的链路实现正常通信,提高系统容量。仿真实验证实了该模型的优良性能。

This paper presents a link supportability optimization model for multi-carrier SATCOM systems to obtain both the optimal gain of each sub-channel and the uplink effective isotropic radiated power（EIRP）.The maximum carrier power output from the satellite transponder was minimized using the model to reduce the differences among the carrier powers in the satellite transponder so that the transponder＇s operating point is pushed upward to approach the saturation point to the maximum extent to improve the transponder＇s power utility,with each terminal＇s upward EIRP being minimized so that as many links as possible can be supported and the system volume can be enlarged.Simulations verify the superior performance of the model.