室外多用户协作MIMO系统关键技术研究

项目名称： 室外多用户协作MIMO系统关键技术研究

项目编号： No.61201136

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电子学与信息系统

项目作者： 李文刚

作者单位： 西安电子科技大学

项目金额： 25万元

中文摘要： 室外协作MIMO通信是目前无线通信系统研究的热点，是第四代移动通信标准的关键技术之一。然而协作MIMO系统中的中继和用户数目的增加，将导致传输点间交互的信道信息量的激增，以及协作波束赋形算法复杂度的显著提高,并且将使用户间的干扰问题更为突出。上述问题已成为制约协作MIMO系统发展与应用的瓶颈。为了解决以上问题，本项目拟采用以下三种创新性思路：一是致力于减小协作系统中的节点间的信道状态信息交互，创新性的提出基于卫星导航定位辅助信息的协作MIMO通信系统技术，研究一种交互信息量少，且低复杂度的波束赋形算法。二是在信息交互有效的基础上，提出基于发送信号泄漏最小准则的抑制用户间干扰的算法，突破多用户系统中的通信瓶颈。三是提出了在高速运动环境中纠正大多普勒频移的新思路。本项目中前两种思路关系密切，其互相配合，可克服室外协作通信难点，为卫星定位系统辅助无线通信开辟一条新途径。

中文关键词： 协作通信；无人机；卫星导航系统；多入多出；

英文摘要： As a key technology of 4G systems, Outdoor Cooperative MIMO communication systems has been a hotspot to in wireless comunication.With the number of relays and users increasing, the tansinformation of transpoints must be sharp rising, and cooperative beamforming algorithms will be became more and more complicated. Meanwhile, the co-channel interference among users will be extremely serious, which becomes the bottleneck of Cooperative MIMO systems. In order to solve the promblems mentioned above, this paper proposes three creative ideas. The first one focuses on reducing the exchange of channel state information from users. The innovative point is that, based on satellite navigation positioning information assistant, the cooperative communication can exchange less information among users and beamform with lower complexity algorithm. The second poses that, on account of the exchange information is effective, a new algorithm of reducing interference among users is offered based on the minimal signal leakage criterion， which can break through communication bottleneck in multi-user systems. Finally, a Doppler Correction algorithm is suggested, which is used in high-speed mobile enviroment. The first two ideas closely coodinate with each other, which can overcome the difficulties of Outdoor Cooperative MIMO systems,

英文关键词： cooperative communication；UAV；GNSS；MIMO；