中文摘要：

为解决单极化天线中多输入多输出（MIMO）技术与移动终端有限体积之间的矛盾，将半正交代数空时（SAST）编码应用到配置双极化天线的MIMO系统中，并对SAST编码性能进行理论分析。将置换矩阵和交叉极化鉴别度（XPD）转换为等效信道的一部分，并使SAST编码在双极化天线中的传输模型等效转变为该编码在单极化天线中的传输模型，根据秩准则和乘积准则分析置换矩阵不同时，XPD对分集增益和编码增益的影响，并给出相应的译码方法。仿真结果验证了该理论分析的正确性。

英文摘要：

To solve the contradiction of Multi-input Multi-output（MIMO） with single-polarization antennas and limit of mobile terminals, Semi-orthogonal Algebraic Space-time（SAST） coding is applied to MIMO system with dual-polarized antennas, and its performance is analyzed in theory. Permutation matrix and Cross-polarized Discrimination（XPD） are regarded as the part of effective channel, SAST coding with dual-polarized antennas is COlrverted to that with dual-polarized antennas. Therefore, the effect of permutation matrix and XPD on diversity gain and coding gain is analyzed according to rank criterion and determinant criterion, and the decoding method is investigated. Simulation results demonstrate the validity of this theoretical analysis.