多径信道下基于空时分组码的发送分集技术  

Transmit Diversity Technique Based on Space-Time Block Coding in Multi-path Fading Environment

作　　者：杜光宇[1] 何培宇[1] 任霄函[1] 

机构地区：[1]四川大学电子信息学院,四川成都610064

出　　处：《通信技术》2008年第10期61-63,共3页Communications Technology

基　　金：通信抗干扰技术国家重点实验室资助项目(编号:9140C0202020802)。

摘　　要：文章在多径信道下,提出了一种基于RAKE接收机的空时分组编码(STBC)方案。该方案将空时分组编码(STBC)与RAKE接收机的多径叠加相干检测的方法相结合,从而可以在频率选择性衰落信道下采用多发射天线实现发送分集。此方案获得的分集增益与由采用相同数量接收天线的最大比接收合并(MRRC)方案得到的接收分集增益接近,能够较大地提高传输系统的可靠性。This paper presents a RAKE-based STBC scheme used in multi-path fading environment. With the coherent detection method of RAKE receiver, the scheme can provide transmit diversity by using multiple transmitting antennas in frequency selective fading channel. The diversity gain of this scheme is close to that of MRRC（maximal-ratio receiver combining）scheme, which uses same amount of receiving antennas. Simulation results show that the reliability of the transmission system can thus be improved obviously.

关 键 词：空时分组编码 RAKE接收机 多径信道 发送分集 

分 类 号：TN911[电子电信—通信与信息系统]