分集技术及Pake接收机误码率的仿真

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。

Diversity Technique and Simulation of Error Rate for Rake Receiver

Rake receiver model is one of key technique in CDMA cellular mobile communication system. The principium 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.