摘要
针对月球和深空等远距离探测任务,对测控数传链路进行了计算。对射频相干AGC控制模式,基于统一X波段(UXB)测控数传分系统的信号及其调制度的分析,给出了测控数传链路计算的数学公式。实际计算结果表明:调制度优化设计在满足测控设计余量要求的前提下,降低了对航天器G/T值和有效全向辐射功率(EIRP)值的要求。
Aim to the exploration mission of long distance in moon and deep space applications, the calculation of the TT＆C channel was studied in this paper. Based on the analysis of the signals of TT＆C in UXB systems and its modulation indexes, the mathematics equations of the calculation of the TT＆C channel were given out for different control modes for its received signal power. The results of the calculation in moon exploration showed that the optimization design of the modulation index would be satisfied with the requirement of design margin of TT＆C, and also would reduce the requirement of G/T and EIRP of spacecraft.
出处
《上海航天》
2014年第5期44-47,64,共5页
Aerospace Shanghai
关键词
深空探测
统一X波段
上下行调制度
测控数传信道
Deep space exploration
UXB
Up-link and down-link modulation index
TT＆C channel
