摘要
星间链路性能分析是建立星间通信的基础。以包含GEO卫星、IGSO卫星和MEO卫星的三层卫星网络为例,仿真了三层卫星网络层间卫星星间距离的变化范围。在设定星间传输体制、链路参数、传输损耗等条件下,分别分析了该三层卫星网络的GEO-IGSO、GEO-MEO和IGSO-MEO三种链路在Ka频段和激光频段的性能。结果表明,在Ka频段,0.5m天线仅需5W的发射功率,可以满足2Mb/s以上的星间数据传输率;激光频段仅需0.5W的发射功率,直径0.25m的天线,可以达到2Gb/s以上的星间数据传输率,激光链路更有利于星间链路性能的提高。研究结果在未来三层卫星网络建立星间链路时,为卫星的发射功率、天线直径和星间链路数据传输速率等方面的选择提供了参考。
Performance analysis of intersatellite links is the basis for establishing intersatellite communications.A 3-layer satellite network containing GEO,IGSO,and MEO satellites is used as an example to simulate the variation range of distance interlayer satellites of the 3-layer satellite network and to analyze the performance of GEO-IGSO,GEO-MEO,and IGSO-MEO links in Ka-band and laser links under the preset intersatellite transmission system,link parameters,transmission loss,etc.Results show that 0.5m antennas only need 5W transmitting power to provide an intersatellite data transmission rate higher than 2Mb/s in the Ka-band and the laser links data transfer rate can achieve to more than 2Gb/s with 0.5W launching power and the 0.25m antenna diameter.The laser links greatly improve the communication ability compared with the microwave frequency band.This serves as a reference for the selection of the transmitting power,antenna diameter,and intersatellite information transmission rate of satellites during the establishment of intersatellite links for 3-layer satellite networks in the future.
出处
《计算机工程与科学》
CSCD
北大核心
2012年第4期1-6,共6页
Computer Engineering & Science
基金
国家自然科学基金资助项目(11073022,10673011)
民用航天预先研究资助项目(C1320061301)
湖南省自然科学基金资助项目(11JJ3072)
中国科学院精密导航定位与定时技术重点实验室开放基金资助(2009PNTT07)
长沙市科技计划项目资助(K1008012-11)
关键词
卫星通信
星间链路性能分析
星座仿真
激光链路
satellite communication
analysis of satellite intersatellite links performance
constellation simulation
laser links
