DS-CDMA通信中的一种2D-Rake接收机  

2D-Rake Receiver in DS-CDMA Communication

作　　者：韩立忠[1] 

机构地区：[1]东南大学信息科学与工程学院,江苏省南京市210096

出　　处：《信息化研究》2010年第4期25-27,共3页INFORMATIZATION RESEARCH

摘　　要：Rake接收机在3G系统中已被广泛使用,实际应用证明它能够有效对抗移动无线信道中的多径衰落。传统Rake接收机有其时域一维处理的局限性,为获得更好的系统性能,本文在分析空时信道模型的基础上提出一种新的空时2D-Rake接收机算法,它将波束形成技术与Rake相结合。这种波束形成算法能够在干扰方向上完全陷零,其权重仅与阵列天线的导向矢量有关,与接收信号无关。最后简要分析了所提出的2D-Rake接收机的性能。仿真结果表明,这种空时2D-Rake接收机与传统Rake接收机相比,具有较好的性能,而且该算法对噪声具有鲁棒性。Rake receiver has been widely used in 3G system. Practical applications prove that it can ef- fectively solve the multipath fading problem of mobile wireless channel. Traditional Rake receiver has its own one-dimensional time-domain processing limitations, in order to obtain better system performance, based on the analysis of space-time channel model, a new kind of space-time 2D-Rake receiver algorithm is presented, which combines beam-forming and Rake receiver technology. This beam-forming algorithm can make exact zero setting in the interference direction, and its weight only relates to the array antenna orientation vector, and is irrelevant to the received signal. This paper concludes with a brief analysis of the proposed 2D-Rake receiver performance. Simulation results show that the space-time 2D-Rake receiver, compared with the traditional Rake receiver, has better performance, and the algorithm is robust to noise.

关 键 词：自适应天线 2D—Rake接收机 波束形成 

分 类 号：TN92[电子电信—通信与信息系统]