面向日地拉格朗日L2点探测的深空遥测数传系统设计与试验

摘要

In the first mission of satellite CE-2 travel from orbit of Luna to Libration points .2 in the Sun-Earth system, owing to ability of the ground equipment, the telemetry and data transmission system must conquer the technical difficulties, which are the problems of long distance and weak signal. Therefore some technical experiments are developed, which are study of weak signal capture and tracking, study of low loss demodulation, high performance of encode technology, design of tracking, telemetry and command (TT&C) and data transmission system and test experimentation. Experimental results indicate that telemetry and data transmission system has the ability of 1500 000~1700 000 km distance communication, it will be significantly useful for reference to the deep space exploration.%嫦娥二号卫星首次实现从月球轨道飞向日地拉格朗日L2点开展深空探测试验.受当前星地测控设备天线口径限制,遥测数传系统面临作用距离远、接收信号弱的技术难题,为此开展了地面弱信号捕获、低损失数据解调和高效信道译码等新技术探索与试验验证.试验结果表明,地面遥测数传系统成功实现了1 500 000～1 700 000 km的数据接收解调,并具有实现更远距离深空通信的拓展能力.