无线通信中的快时变信道建模  

Models for Rapidly Time-varying Channels in Wireless Communications

作　　者：许月[1] 何玉娇 朱曹斌 

机构地区：[1]东南大学信息科学与工程学院,江苏南京210096

出　　处：《数学的实践与认识》2015年第14期170-180,共11页Mathematics in Practice and Theory

摘　　要：以无线通信中的快时变信道为对象,使用基扩展模型估计快变信道参数,并对多种基扩展模型进行性能分析;研究多普勒频移对基扩展模型准确度的影响;探讨并改进了构建多径瑞利信道的方法;讨论了信号通过多径时变瑞利信道的处理方法;搭建了OFDM通信仿真系统,并分别用LS法、LMMSE法、SVD法设计了基于块状导频技术估计的信道均衡器.Relying on the basis expansion model （BEM） for rapidly time-varying channels, this paper analyzes the performance of multiple BEMs in wireless communications. The Doppler frequency shift will affect the accuracy of these models. The methods of the con- structions on multipath Rayleigh channel are discussed and improved. This paper also has a discussion on the methods when the signal was transmitted over a multipath Rayleigh channel. Furthermore, this paper implements the OFDM communication simulation system. The block-type pilot channel estimation can be based on least square （LS）, linear minimum mean-square error （LMMSE） and singular value decomposition （SVD）.

关 键 词：基扩展模型 分块处理 改进型Jakes模型 OFDM 信道均衡 

分 类 号：TN92[电子电信—通信与信息系统]