面向天通一号卫星移动通信系统FDD终端的收发隔离设计

Design of Transceiver Isolation for FDD Terminal of Tiantong-1 Satellite Mobile Communication System

卫星移动通信不受地理环境、气候条件限制,可以有效补充和延伸地面蜂窝系统和地面固定网覆盖。历经多年研发,我国第一代自主卫星移动通信系统“天通一号”在2021年完成星座组网建设。卫星移动通信系统较低的收发频率间隔和远大于地面移动通信系统的路径损耗对频分双工(Frequency Division Duplexing,FDD)模式卫星移动通信终端收发隔离设计提出严峻挑战,通过分析基于射频收发芯片RX6003的FDD模式通信终端的系统收发隔离设计及指标分析,提出终端设计的关键点及链路指标分配方案。

Satellite mobile communication is not limited by geographical environment and climatic conditions,and can effectively supplement and extend the coverage of terrestrial cellular systems and terrestrial fixed networks.After years of research and development,my country's first-generation autonomous satellite mobile communication system"Tiantong-1"will complete the construction of a constellation network in 2021.The relatively low transceiver frequency interval of satellite mobile communication systems and the path loss much larger than that of ground mobile communication systems pose severe challenges to the transceiver isolation design of satellite mobile communication terminals in Frequency Division Duplexing(FDD)mode.The system transceiver isolation design and index analysis of the FDD mode communication terminal of RX6003 are presented,and the key points of terminal design and link index allocation scheme are proposed.