提出一种基于C,Ku,Ka频段透明转发器的双向链路频谱重叠共享频带的TDM/FDMA星型网卫星通信系统方案,小站至中心站的反向链路采用FDMA接入方式,中心站至各个小站的前向链路采用TDM广播方式。理论和仿真分析结果表明:该系统的频带效率比常规TDM/FDMA系统提高了1倍,而链路的传输性能仍可以达到实用要求。 This paper proposes a TDM / FDMA satellite network communication system based on C / Ku, Ka-band transparent transponders for bidirectional link spectrum sharing and sharing of frequency bands. The reverse link from the small station to the central station adopts FDMA access mode, The forward link to each small station adopts TDM broadcasting way. The theoretical and simulation results show that the system’s bandwidth efficiency is double that of the conventional TDM / FDMA system, and the transmission performance of the link can still meet the practical requirements.