多径衰落信道中QPSK信号传输特性的研究  

Research and Simulation of the Translated-characteristic QPSK Signal in the Multipath Channels

作　　者：张丽丽[1] 陈伟[1] 

机构地区：[1]武汉理工大学信息工程学院,湖北武汉430070

出　　处：《武汉理工大学学报（信息与管理工程版）》2007年第12期43-46,共4页Journal of Wuhan University of Technology：Information & Management Engineering

摘　　要：简要介绍了移动无线信道的基本概念、特点、分类及理论知识,并推导了典型的小尺度衰落信道中莱斯分布和瑞利分布的一些特性;另外重点通过自定义Matlab环境下的M文件对无线信道的典型例子,即平坦衰落信道进行了仿真。特别是使用简单的Matlab程序,对莱斯分布的累积分布函数(CDF)和概率密度函数(PDF)进行了仿真估计。最后,对数字调制后的QPSK信号通过莱斯衰落信道时的性能进行了仿真估计,并得到相应的分析结果。The basic concept, characteristics, types and academic knowledge of mobile radio channel were briefly introduced. The properties of typical small - scale fading channel models such as Rice distribution and Rayleigh distribution were deduced. Typical examples of modeling flat fading channels in MATLAB were simulated specifically by means of user - defined m - files. In addition, simple and useful MATLAB constructions for approximation of cumulative distribution functions （CDF） and probability density functions （PDF） were also used to make the simulating estimation. The performance estimation of quadrature phase shift keying （QPSK） signaling over a Rice fading channel was simulated and the corresponding analyzing results were obtained.

关 键 词：移动衰落信道 瑞利/莱斯分布 QPSK MATLAB仿真 

分 类 号：TN011[电子电信—物理电子学]