两种闭环准正交空时分组码的设计

针对准正交空时分组码(QOSTBC)存在自干扰的特性,提出了两种基于部分反馈的闭环QOSTBC的设计方法,这两种反馈方法可以减小QOSTBC的自干扰,提高QOSTBC的误码性能。仿真和分析结果表明提出的方法在相同反馈信息下的性能优于天线混淆(TAS)准正交空时分组码,在系统性能相差不大(不超过0.5dB)的情况下所需的反馈信息远小于信道正交化空时分组码(CO-STBC),而且提出的方法具有较低的设备复杂性和较好的鲁棒性。

Two Design Methods of Close-Loop Quasi-Orthogonal Space-Time Block Code

Based on the self-interference of quasi-orthogonal space-time block code (QOSTBC), two partial feedback close-loop QOSTBC design methods are proposed. The proposed methods can reduce the self-interference of the QOSTBC and improve the bit error rate (BER) performance. The simulation results show that the performance of the proposed method is better than the performance of transmitting antenna shuffling (TAS) QOSTBC with the same feedback information. The feedback information of this proposed method is less than that of channel orthogonal space-time block code (CO-STBC) under the condition of slight difference of the performance (no more than 0.5dB). In addition, the proposed method has the low complexity and the good robustness of the equipment.