一、前言在蓬勃发展的卫星通信事业中,时分多址方式引起了越来越多的人们的重视。目前许多国家争先研制,发展很快。众所周知,在时分多址工作方式中,参加该系统的各地面站都是使用同一载波频率,按时间划分,轮流发射的。这就需要有一个时间基准,故该系统设有一个基准站(或参考站),其它站就称作非基准站(或非参考站)。非基准站均以基准站作为 I. Introduction In the flourishing development of satellite communications, time division multiple access has aroused more and more people’s attention. At present, many countries are striving to develop first and develop rapidly. As we all know, in the time division multiple access mode of operation, participating in the system of the ground stations are using the same carrier frequency, divided by time, take turns firing. This requires a time base, so the system has a base station (or reference station), other stations are called non-base station (or non-reference station). Non-base stations are used as the base