摘要
Rake接收技术是CDMA蜂窝移动通信系统中的关键技术之一。分集的基本思想是将接收到的多径信号分离成不相关的多路信号,把这些多径信号的能量按一定的规则合并,使接收到的有用信号能量最大化,进而提高接收信号信噪比达到抗衰落的目的。文中以异步DS-CDMA系统为例,论述了分集技术并对Rake接收机的误码率进行了分析与仿真。
Rake receiver model is one of key technique in CDMA cellular mobile communication system. The prineipium of diversity is that maximizing the received multiple - path signal power through separating the signal into several irrelevant signal and incorporating the received signal by some rules, and then diversity can resist fading by improving signal -to - noise ratio at receiver. In this paper, we discussed the diversity technique, and give the performance simulation results on error ration of Rake receiver in DS - CDMA system.
出处
《电子科技》
2007年第5期52-55,共4页
Electronic Science and Technology
关键词
分集
信噪比
RAKE接收机
误码率
diversity
signal - to - noise ratio
Rake receiver
error rate
