【摘要】 设计了一种新的M-PSK调制下的差分准正交空时分组码(DQOSTBC),这种方法通过引入一种基于旋转因子的准正交空时分组码,构造出一组差分调制酉矩阵.这种引入的准正交空时分组码没有带来星座扩展,使得新的编码具有更大的欧氏距离.仿真结果表明,在使用多接收天线条件下,此设计方法比先前文献中关于差分准正交的方案能获得更大的传输性能.更多还原

【Abstract】 A new differential quasi-orthogonal space-time block coding(DQOSTBC) scheme is presented for M-PSK in this paper.we use the quasi-orthogonal space-time block coding(QOSTBC) by introducing rotation coefficient to construct a group of unitary matrices for differential modulations.Because our scheme doesn’t expend the constellation,it has large Euclidean distance than published DQOSTBC schemes.Simulation results demonstrate that the new scheme can obtain better transmission performance than the scheme presented in the previous literatures for large number of receive antennas.更多还原