摘要
为应对高速高质量的数据传输需求,卫星通信系统需要采用先进通信技术手段提高频谱利用率、增大系统容量。多天线技术是地面无线蜂窝网络中提升系统性能的重要技术。将多天线技术用于卫星通信中,在单卫星双极化系统和双卫星协作系统中,研究了多天线技术的应用潜力,并通过仿真展示了多天线卫星通信系统的性能优势。结果表明,单卫星系统中通过双极化MIMO传输,可改善交叉极化的影响,多星协作系统中通过分集传输或预编码干扰消除,可提升系统传输性能。
In order to satisfy the increasing demands of high speed and high quality data transmission,the satellite communication system is expected to improve the frequency efficiency and the total capacity.MIMO is an important technology in terrestrial wireless communication systems,which provides potential performance gain and has already been adopted into cellular communication networks.In this paper,MIMO is applied into the satellite communication system.In both single-satellite dual-polarization and dual-satellite cooperation systems,the MIMO processing methods were studied,and the system performance was evaluated by simulation. Results show that cross-polarization interference is avoided by dual-polarization MIMO processing,and the transmission performance is improved by MIMO diversity or precoding in dual-satellite system.
作者
张千
陈东
肖永轩
丁睿
ZHANG Qian;CHEN Dong;XIAO Yongxuan;DING Rui(China Academy of Space Technology,Beijing 100094,China)
出处
《空间电子技术》
2018年第1期54-59,共6页
Space Electronic Technology
基金
国家自然科学基金项目(91438205
61675232)
装备预研项目(30501030101)
关键词
卫星通信
MIMO
空间相关性
Satellite communication
MIMO
Spatial correlation
