为优化差分酉空时编码性能,一种适用于MIMO差分空时编码的幅度-相位调制架构被提出,该架构码元矩阵由标量幅度系数和PSK信号星座图组成,幅度系数控制发射信号功率,PSK信号为列向量正交的相位酉阵,幅度系数和相位酉阵均采用差分编译码。仿真结果表明此架构编码相对于相位调制编码而言,进一步提高了频谱的发射效率。 To optimize the performance of differential unitary space-time coding, an amplitude-phase modulation architecture suitable for MIMO differential space-time coding is proposed. The symbol matrix consists of a scalar magnitude coefficient and a PSK signal constellation. The amplitude coefficient controls the power of the transmitted signal, The PSK signal is a quadrature unitary matrix orthogonal to the column vector, and both the amplitude coefficient and the phase unitary matrix use differential coding and decoding. The simulation results show that the coding of this architecture improves the efficiency of spectrum transmission compared with that of phase modulation coding.