应用双正交极化天线的MIMO卫星-地面宽带协作通信技术研究

项目名称： 应用双正交极化天线的MIMO卫星-地面宽带协作通信技术研究

项目编号： No.61301105

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 井庆丰

作者单位： 南京航空航天大学

项目金额： 24万元

中文摘要： 卫星-地面协作通信技术将卫星与地面移动通信相结合,能够解决战争、自然灾害情势下地面通信中断或室内、隧道等卫星通信盲区问题。在协作通信系统中应用多输入多输出（MIMO）技术能大幅提高系统容量并能对抗频率选择性衰落，但以下问题严重影响多天线间信道独立性，限制了该系统中MIMO技术的应用：卫星和地面移动终端体积受限、无法保证足够的天线间距，多天线间耦合严重；卫星与地面信道环境复杂，难以使用发端技术增强天线间信道独立性；卫星通信存在较强直射信号，影响多接收天线间信号分离。项目拟采用融合空时分组编码和星座旋转的双正交极化天线技术解决以上问题,仿真建立MIMO卫星-地面宽带协作通信系统模型；考查该多天线技术对信道极化特征和天线间信道相关性的影响，并依据不同中继节点工作模式，建立MIMO卫星-地面宽带协作通信信道模型；在此基础上，分析应用双正交极化天线技术的协作通信系统性能，为该系统的实现提供理论依据。

中文关键词： 多输入多输出；卫星通信；双正交极化天线；太赫兹；

英文摘要： By integration of satellite communication and terrestrial mobile communication, the Satellite-Terrestrial Broadband Cooperative Communication technology can solve the communication interrupt problem due to war or natural disasters, and can also cope with the blind areas of satellite communication indoor or in tunnels. Application of Multiple Input and Multiple Output (MIMO) technology can increase the system capacity and is able to confront with the frequency selective fading. However, the channel independence among the multiple antennas is seriously affected by the following factors and set the limitation for application of MIMO technology in the system. Firstly, the terminal volume of satellite and terrestrial mobile terminal are limited. The spaces between the antennas are small and serious coupling among the multiple antennas always happens. Secondly, the complex channel condition of satellite and terrestrial communication prevents implementation of the transmission techniques from increasing the channel independence. Thirdly, existence of high power line of sight (LOS) in Satellite communication can prevent the signal separation among the multiple antennas. This project will solve the problems above by adopting Dual-orthogonal Polarized Antennas combining with the space-time block code and constellatio

英文关键词： MIMO；Satellite communication；Dual-orthogonal Polarized Antennas；Teraherz；