数字移动通信中的抗多径衰落技术

移动信道的主要特征是由移动和多径传播所产生的多径衰落现象。在高速移动通信系统中，必须采用抗多径衰落技术，才能实现有效传输。本文首先概述了移动信道的数学模型及其典型形式，在此基础上，分别讨论了时分多址（ＴＤＭＡ）和码分多址（ＣＤＭＡ）系统的抗多径衰落方法──自适应信道均衡技术及多径分集接收技术，并简述了近年来较为活跃的多用户检测技术和自适应天线分集技术。

Anti-multipath-fading Techniques in Digital Mobile Communications Systems

The mobile communication channel suffers from severe fading distortion due to multipath phenonmenon. This makes it necessary to adopt anti-multipath techniques in high speed mobile communication systems. On the basis of an overview of typical mobile communication channels, this paper presents survey on anti-multipath techniques in TDMA and CDMA mobile communications systems,with special attention paid to adaptive channel equalization,RAKE receiver and multiuser detection.The recently proposed diversity technique using adaptive array is also addressed.