摘要
提出了一种基于匙孔信道的旋转四元素准正交空时分组码(QQOSTBC-CR,Constellation Rotation QuaternionQuasi-Orthogonal Space Time Block Code),该码可以通过极化天线进行发射和接收,设计出发射天线数为8的QOSTPBC-CR,并对N=8的情况进行成对译码,最后与匙孔信道下传统旋转准正交空时分组码(QOSTBC-CR,Constellation Rotation Quasi-OrthogonalSpace Time Block Code)、准正交空时分组码(QOSTBC,Quasi-Orthogonal Space Time Block Code)以及瑞利信道下QQOSTBC-CR进行了仿真比较。结果表明:对4个发射天线的情况,当BER=10^(-3)时,BPSK和QPSK调制下本文所提QQOSTBC-CR分别比QOSTBC-CR有4.5dB和7dB的增益,分别比瑞利信道下QQOSTBC-CR有-4dB和-3dB的增益。
A new kind of constellations rotation for quaternion quasi-orthogonal space time block code(QQOSTBC-CR) in keyhole channel is proposed.These codes can transmit and receive through dual-polarized antennas respectively.The QQOSTBC with eight transmit antennas are designed firstly.And pair-wise decoding algorithm is adopted for N=8.Finally,it is compared the QQOSTBC-CR with the QOSTBC-CR(Constellation Rotation Quasi-Orthogonal Space Time Block Code) and QOSTBC(Quasi-Orthogonal Space Time Block Code) in the case of keyhole channel,and with the QQOSTBC-CR in the case of Rayleigh channel.Simulation results show that the new QQOSTBC-CR can provide a gain of 4.5dB/7dB than the QOSTBC-CR at the given BER of 10^(-3) for BPSK/QPSK in the condition of four transmit antennas and keyhole channel,the new QQOSTBC-CR can provide a gain of -4dB/-3dB than the QQOSTBC-CR in the case of Rayleigh channel for BER=10^(-3).
出处
《信号处理》
CSCD
北大核心
2010年第4期619-625,共7页
Journal of Signal Processing
基金
国家重点基础研究发展计划(973计划)资助(No.2007CB310606)
国家自然科学基金资助(No.60902011&No.60802006)
中国博士后科学基金特别资助(No.200902501)
江苏省自然科学基金资助项目(No.BK2009476)
中国博士后科学基金资助(No.20080441016)
江苏省高校自然科学基础(No.07KJD510247)
东南大学移动通信国家重点实验室自主研究课题资助(No.2009A08)
关键词
四元素准正交设计
空时分组码
旋转星座
最大似然译码
匙孔信道
quaternion quasi-orthogonal design
space time block code
constellation rotation
maximum likelihood decoding
keyhole channel