WCDMA中基于导频辅助的2D-RAKE接收机研究  

Pilot Symbol Aided Space-Time 2D-RAKE Receiver for Wideband CDMA System

作　　者：张建明[1] 

机构地区：[1]西南交通大学计算机与通信工程学院,成都610031

出　　处：《成都大学学报（自然科学版）》2005年第4期295-298,共4页Journal of Chengdu University（Natural Science Edition）

摘　　要：针对WCDMA上行链路的时分导频和复扩频方式的特点,提出了一种适用于WCDMA系统的线性自适应空时二维RAKE接收机.利用导频符号进行权向量更新算法,并作为空间波束成型器的参考信号.理论分析和在多用户时变频率选择性衰落信道下的仿真研究表明,对导频信号的充分利用可以降低空时二维接收机的实现复杂度,所提的接收机能明显提高接收机的输出信噪比,降低误码率,系统容量也明显提高.In Wideband CDMA systems, pilot symbols and complex spreading were adopted in uplink channels. According to this feature, a novel pilot symbol aided 2D-RAKE receiver for WCDMA system was proposed in the literature. The pilot symbols were used to estimate channel and acted as reference signal of beam-former. The simulatiom with the conditions of muhiuser frequency selective fading channels has shown that the 2D RAKE proposed can provide significant capacity enhancements over the conventional temporal RAKE receivers. This study proves that the sufficient use of pilot symbols could reduce the complexity of 2D-RAKE receivers.

关 键 词：WCDMA 导频 智能天线 2D-RAKE接收机 

分 类 号：TS245.9[轻工技术与工程—制糖工程]