STBC与VBLAST混合编码系统中一种新的天线选择算法

Novel antenna selection algorithm for STBC and VBLAST hybrid coding systems

多输入多输出(MIMO)系统改善了误码率性能,同时为了减少对系统容量的影响,提出了空时分组码(STBC)与贝尔实验室垂直分层空时码(VBLAST)混合编码系统中的一种新的天线选择算法。对部分VBLAST层采用AlamoutiSTBC编码构成的混合编码,MIMO系统同时具有STBC与VBLAST两者的优点。基于天线子集最大容量准则,提出的天线选择算法选择那些对系统容量贡献较小的天线发送多层STBC信号,以便减少STBC编码所造成的系统容量损失。理论分析与仿真结果表明,提出的天线选择算法能够有效地提高STBC与VBLAST混合编码系统的容量,并且与VBLAST编码的MIMO系统相比其误码率性能得到明显改善。

Multiple-input multiple-output （MIMO） systems improve the bit error rate （BER） performance, meanwhile, in order to reduce the impact to system capacity, a novel antenna selection algorithm for space-time block coding （STBC） and vertical Bell laboratories layered space time （VBLAST） hybrid coding systems was proposed. Employing the Alamouti STBC code for some VBLAST layers, the STBC and VBLAST hybrid coding MIMO system has the advantages of both STBC and VBLSAT. On the criterion of maximal antenna-subset capacity, the proposed antenna selection algorithm selects those antennas with less contribution to the system capacity to send multilayer STBC signals, so that the system capacity loss by STBC coding can be reduced. Both theoretical analysis and simulation results indicate that the proposed antenna selection algorithm increases the capacity of the STBC and VBLAST hybrid system effectively, and improves the BER remarkably comparing with a VBLAST encoding MIMO system.