摘要
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。
A new differential space-time coding scheme based on amplitede-phase modulation in MIMO,is proposed.Its each code matrix consists of scalar amplitude coefficient and PSK constellation,the amplitude coefficient controls transmission power,while the phase matrix is a unitary matrix from PSK symblos whose row-vectors are constructed from orthogonal designs.Both the amplitude and phase are differentially encoded and admit efficient differential decoding.Simulation results show that the proposed scheme could provide higher spectral efficiency.
出处
《通信技术》
2011年第1期81-83,共3页
Communications Technology
关键词
幅度-相位调制
相位调制
差分空时码
amplitude-phase modulation
phase modulation
differential space-time coding
