基于对称扩展的超高速移动时变信道建模方法的研究

项目名称： 基于对称扩展的超高速移动时变信道建模方法的研究

项目编号： No.61201206

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： 王毅

作者单位： 重庆邮电大学

项目金额： 23万元

中文摘要： 超高速移动环境下的无线信道具有快速时变特性，是实现超高速飞行器之间无线通信的基础，特别是在军事领域的应用引起了广泛的重视。快速时变信道建模是实现超高速移动环境下可靠通信最重要的步骤之一，直接影响信道估计与信道均衡性能，是该领域中最急待解决的问题。该项目旨在提出超高速移动环境下快速时变信道建模的新方法。针对目前的快速时变信道建模在复杂信道环境下无法保持鲁棒性以及在信道边缘存在较大的建模误差等问题，分析快速时变信道建模误差与鲁棒性的理论关系，研究基扩展信道建模方法的理论基础，建立对称扩展方法对基扩展信道建模误差影响的理论模型，提出基于对称扩展的快速时变信道建模方法，能够有效解决超高速、中速、低速等复杂信道环境的建模问题。该技术能够产生新型超高速移动通信的理论支撑，形成自主核心知识产权。该项目的研究对于形成超高速移动复杂信道环境下的无线通信解决方案具有十分重要的意义。

中文关键词： 快速时变信道；基于基扩展模型（BEM）；基函数；MIMO-OFDM；

英文摘要： The research on the time-variant fading channel under ultra high speed mobile environment has received increasing attention in the ultra high speed aircraft wireless communication systems, especially in the military area. The modeling of fast varying channel is one of the most urgent challenges to implement a reliable ultra high speed mobile communication system. It will effect the channel estimation and channel equalization performance directly. The robustness under complicated channel environment is poor and the modeling error especially at the channel boundaries is large in the present channel modeling methods. In order to solve these problems, the theoretical relationship between the modeling error and the robustness is analyzed. The principle of BEM (basis expansion model) method is researched. The theoretical explanation on how symmetric extension can reduce the BEM modeling error is given. The fast fading channel modeling method based on symmetric extension is proposed to solve the modeling problem under ultra high speed, medium speed, and low speed complicated channel environment. The proposed method will support the new ultra high speed mobile communications theory and produce independent intellectual property rights. The research on this project is of vital importance to the wireless communication solu

英文关键词： fast varying channel；Basis Expansion Model；basis function；MIMO-OFDM；