星载多波束测控接入一体化通信系统

Multibeam TT&C and access integrated spaceborne communication system

为满足星载测控通信的需求,在充分借鉴国内外中继卫星技术方案基础上,提出了一种S频段测控接入一体化的设计方案.系统采用前向射频空间波束形成,返向星上数字波束形成(digital beamforming,DBF)技术方案.仿真结果表明,该方案的前向有效全向辐射功率(effective isotropic radiated power,EIRP)、返向增益/温度(gain/temperature,G/T)值均能满足系统通信的要求,测控波束和接入波束共用部分射频通道,后端信号合并处理,实现了一体化的设计目标.该方案具有天线增益高、灵活性好等特点,为多用户测控提供了一种新的解决方案.

In order to satisfy the requirements of satellite communication,on the basis of relay satellite system in China and abroad,an integrated of telemetry,track and command(TT&C)access in S-band is presented in this paper.RF beamforming is adopted in the antenna forward,and digital beamforming(DBF)is adopted in the backward antenna.The simulation results show that the forward effective isotropic radiated power(EIRP)and backward gain/temperature(G/T)of the scheme can meet the requirements of the system communication.The TT&C beam and access beam share part of the RF channel,and the digital signal is combined for processing.The integrated design goal is achieved.This scheme has the characteristics of high gain and flexibility,which provides a new solution for multi-user TT&C.