STBC和VBLAST相结合的MIMO系统  

MIMO System Combining Space-Time Block Codes and VBLAST

作　　者：王中鹏[1,2] 邱忠媛[3] 吴伟陵[1] 

机构地区：[1]北京邮电大学信息工程学院 [2]浙江科技学院计算机系 杭州 310012 [3]辽宁工学院数理科学系

出　　处：《电子与信息学报》2005年第7期1098-1100,共3页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60172051)国家863计划(2001AA123016)资助课题

摘　　要：STBC编码是基于发端分集的传输方案,VBLAST是基于空间复用的传输方案;基于两种方案的MIMO 系统,在空间相关信道下系统的性能都会下降,但前者的性能会明显好于后者;该文提出一种折衷方案,将发射天线阵列分组,每组内采用STBC编码,接收端采用VBLAST算法。仿真结果表明:在空间相关信道下,该方案的误码率性能明显优于通常的VBLAST接收机。Space-Time Block Codes (STBC) is a scheme based on diversity-oriented transmission while VBLAST is another scheme based on spatial multiplexing; The performances of the two different MIMO systems are both degraded in correlated channels, however the performance of the former is better than the later. This paper proposes a trade-off scheme that the transmit antennas are divided into group meantime space-time block codes are applied to the different groups, VBLAST algorithm is used in the receiver. Simulation results show that performance of proposed scheme greatly gains over the VBLAST.

关 键 词：STBC VBLAST 多入多出(MIMO) 信道相关性 

分 类 号：TN911.2[电子电信—通信与信息系统] TN914[电子电信—信息与通信工程]