慢衰落信道分集的性能极限与turbo-code的应用  

Performance Limits of Diversity in Slow Fading Channel and the Applications of Turbo Code

作　　者：周世东[1] 梅顺良[1] 姚彦[1] 

机构地区：[1]清华大学电子工程系微波与数字通信国家重点实验室

出　　处：《通信学报》1998年第4期18-22,共5页Journal on Communications

摘　　要：本文针对移动通信中常见的慢衰落下有效分集数有限的特点，给出了这种信道的性能理论极限的新定义，并分析了常见的高斯信号和ＭＰＳＫ信号在这种信道中的极限性能。讨论了ｔｕｒ－ｂｏ－ｃｏｄｅ应用于这种信道的方法，仿真结果表明，ｔｕｒｂｏ－ｃｏｄｅ在这种信道中可以获得接近极限的性能。In slow fading channel, the channel information capacity is of no use due to the limit number of effective diversity branches. A new definition of performance limit of this kind of channel is proposed in this paper, and some numerical analysis is given for Gaussion and MPSK signals in Rayleigh proposed in this paper. The application of turbo code in such channel is also discussed and simulation results show that properly designed turbo code can behave near performance limit.

关 键 词：慢衰落 分集 TURBO-CODE 信道编码 

分 类 号：TN911.22[电子电信—通信与信息系统]