【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。更多还原

【Abstract】 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.更多还原