中文摘要：

提出一种基于STBC—VBLAST混合结构的预编码传输方案。本方案以成对差错概率最小化准则为基础。理论推导给出线性预编码矩阵的构造方法，该方法分别对不同STBC层进行单独预处理．各层预编码矩阵由特征波束成形以及功率分配矩阵构成。仿真结果表明：本方案可有效降低系统差错概率，对于正交STBC还可同时提高系统信道容量，且在低维调制下效果更为显著。此外。理论分析显示对于正交STBC编码，信道容量最大化准则与成对差错概率最小化准则等价。

英文摘要：

A novel precoding transmission scheme is proposed based on STBC-VBLAST hybrid system. This proposal is deduced by theoretical derivation in principle of minimizing the pair-wise error rate. Every STBC layer is preprocessed separately, the precoding matrix consist of eigen-beamforming and power allocation matrixes. Simulation results display that this proposal for orthogonal STBC could effective mitigate system error probability and enhance channel capacity compare with the traditional ones, especially in low dimension modulation. Furthermore, theoretical analysis shows that the principle of minimizing pair-wise error rate is equivalent to maximizing the channel capacity for ortbogonal STBC.