多波束高通量卫星的出向链路功率带宽平衡系统  

Power and bandwidth balancing system of outgoing link for multi-beam high-throughout satellites

作　　者：傅云冲 魏昌宁 宋振林 王瑞 孙利国[2] FU Yunchong;WEI Changning;SONG Zhenlin;WANG Rui;SUN Liguo(Apt Mobile Satcom Limited,Shenzhen 518126,China;University of Science and Technology of China,Heifei 230026,China)

机构地区：[1]亚太卫星宽带通信(深圳)有限公司,深圳518126 [2]中国科学技术大学,合肥230026

出　　处：《电波科学学报》2023年第2期277-283,共7页Chinese Journal of Radio Science

基　　金：深圳市科技创新委员会2020年可持续发展专项基金。

摘　　要：如何合理有效分配资源成为目前卫星频率资源分配的主要问题,本文从工程角度出发,通过整合高通量卫星系统和地面多关口站系统,提出了多波束高通量卫星的出向链路功率带宽平衡反馈系统,通过此系统判断卫星载波功率与带宽是否处于正常监控循环状态.在非正常监控循环状态通过功带平衡闭环反馈算法实现功率带宽平衡的自动调节,系统配置前后星上行波管放大器内的接收电平从1.5 dB的波动压缩到0.5 dB内,小站接收载噪比波动差值从2.3 dB降低到0.4 dB,保证了功率带宽平衡,优化了固定分配造成的局限性,适用于目前的多波束高通量卫星.The main problem of satellite frequency resources is the reasonable and effective resources allocation.A power and bandwidth balancing system of outgoing links for multi-beam high-throughout satellites is proposed in this article.The system integrates the high-throughout satellite and gateway station systems,which realizes the power and bandwidth balancing using a closed-loop feedback algorithm.The system determines the power and bandwidth whether it is in normal monitoring cycle state.In the abnormal monitoring state,the closed-loop feedback algorithm realizes the automatic adjustment of power which ensures the balance of power and bandwidth.After the system configuration,the fluctuation of receiving level in the satellite travelling-wave tube amplifier(TWTA)is compressed from 1.5 dB to 0.5 dB fluctuation,and the fluctuation of the very small aperture terminal(VSAT)receiving signal to noise ratio(SNR)is reduced from 2.3 dB to 0.4 dB.The system optimizes the limitations caused by fixed allocation and it is suitable for high-throughout satellites.

关 键 词：多波束卫星 高通量卫星 功率带宽平衡 闭环反馈系统 出向载波系统 

分 类 号：TN927.2[电子电信—通信与信息系统]