摘要
CDMA由于其用户容量大,抗多径衰落能力强以及便于实现软切换等特点而优于其他多址方式,近年来在移动通信系统中越来越得到重视.但是CDMA通信系统由于存在着严重的多址干扰而限制了其容量的进一步提高.多用户检测利用每个用户的信息对接收信号进行相关处理作统计判决或是进行干扰对消从而恢复出各个用户的发送序列,多用户检测方法可以使用最优多用户检测器、线性多用户检测器及非线性多用户检测器等几类.
CDMA has been found more and more attractive in mobile communication system over competing multiple access methods for its great system capacity , robust anti-multipath-fading capability , soft handoff and so on. But the capacity of a CDMA system is limited by multi-address interference. Multiuser detection utilizes the information of all users, making statistic decision on the processed signal and subtracting the interfering signals to restore the desired bit information . This article is focused on the fundamental theory and usual methods against the multi-address interference.
出处
《现代电信科技》
1999年第3期34-38,共5页
Modern Science & Technology of Telecommunications
