摘要
天基信息分发系统是通过卫星将星上获取的信息数据广播给地面终端。基于S频段的信息分发系统具有低功耗、小型化、安全性等特点,通过接收星上数据信息,进行筛选、复接、AOS格式化、加密、信道编码、扩频调制、QPSK调制,上变频等处理,再通过宽带对地赋形天线发射到地面终端。该系统功率可变,实现了不同高度,不同轨道的星上信息数据对地面终端进行广播,具备了实时性、安全性与可靠性,满足了更加多样化的用户需求。
In order to meet the needs of more diverse users,the space-based information distribution system broadcasts the information data acquired on the satellite to the ground terminal.In this paper,information distribution system based on S-band has the characteristics of low power consumption,miniaturization,security,etc.By receiving on-board data information,filtering,multiplexing,AOS formatting,encryption,channel coding,spread spectrum modulation,QPSK modulation and up-conversion are processed,and then transmitting it to the ground terminal through broadband shaped antenna.The power of the system is variable,and the satellite information data of different altitudes and orbits are broadcasted to different terrestrial terminals.The system has real-time,security and reliability,and meets more diverse user needs.
作者
冯伟
王国东
陈龙
方轶
高磊
FENG Wei;WANG Guo-dong;CHEN Long;FANG Yi;GAO Lei(Shanghai Aerospace Electronic Technology Institute,Shanghai 201109,China)
出处
《通信技术》
2019年第7期1766-1772,共7页
Communications Technology
关键词
天基信息系统
信息分发
扩频
space-based information system
information distribution
spread spectrum