WCDMA系统中导频符号辅助的空时二维RAKE接收机  

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

作　　者：闫志刚[1] 贺志强[1] 吴伟陵[1] 

机构地区：[1]北京邮电大学信息工程学院,北京100876

出　　处：《电子学报》2003年第7期994-997,共4页Acta Electronica Sinica

基　　金：国家自然科学基金 (No 60 1 72 0 51 );国家 863项目 (No 2 0 0 1AA1 2 30 1 6)

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 .利用导频符号进行信道估计 ,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干噪比 。In Wideband CDMA systems, pilot symbols and complex spreading were adopted in uplink channels. According to this feature, a novel pilot symbols aided 2D RAKE receiver for WCDMA system was proposed in the literature. The pilot symbols were used to estimate channel and act as reference signal of beam-former. The simulation with the conditions of multiuser frequency selective fading channels shows that the 2D RAKE proposed can provide significant capacity enhancements over the conventional temporal RAKE receivers. This study proved that the sufficient use of pilot symbols could reduce the complexity of 2D RAKE receivers and offer substantial performance gains.

关 键 词：WCDMA 2D RAKE接收机 智能天线 空时二维信号处理 

分 类 号：TN914.53[电子电信—通信与信息系统]