摘要
提出了一种适用于卫星通信时分多址(TDMA)体制的混合双工传输方法,即星地链路收、发采用频分双工(FDD),地面终端收、发采用时分双工(TDD)。该方法通过对卫星覆盖范围内用户终端的地理位置和传输时间进行分析,设计了一种混合双工传输帧结构以及上、下行链路的收、发信号定时策略,解决了卫星通信FDD模式上、下行链路频率间隔小导致的用户终端收、发信号相互干扰问题,有效降低了卫星天线的隔离度要求,进而减少了卫星天线的尺寸,对于小型武器平台的卫星通信能力提升具有重要意义。
This paper presents a mixed duplex transmission method based on satellite communication TDMA which means satellite-ground link transmit/receive signals by FDD and ground terminal send/receive signals by TDD. The method designs a frame structure of mixed duplex transmission and a timing strategy of transmit/receive signals of up-link and down-link by analyzing the geographical location and transmission time of the user terminals within the satellite coverage area. The method solves the interference between the transmitting and receiving signals of the user terminals caused by the nearby frequency interval between the up-link and down link in the satellite communication FDD. It effectively reduces the isolation requirement and the size of satellite antenna, which is of great significance to the improvement of satellite communication capability of army’s small weapon platform.
出处
《现代导航》
2019年第6期450-453,共4页
Modern Navigation
关键词
混合双工
帧结构
定时策略
Mixed Duplex
Frame Structure
Timing Strategy
