相位噪声对多天线QAM性能影响分析

相位噪声对多天线QAM性能影响分析

内容简介：正交幅度调制系统（QAM）对载波的相位噪声非常敏感，多天线技术的使用可以提高通信系统的性能。对QAM系统在当今通信系统中的应用及相位噪声对QAM系统性能影响进行介绍，对多天线QAM系统受相位噪声影响进行了理论分析及仿真验证，并给出了闭式误差向量幅度（EVM）表达式。给出的理论公式及仿真结果对多天线QAM系统相位噪声指标的确定及系统性能分析具有参考意义。

Abstract：Multi-level quadrature amplitude modulation （QAM） is very sensitive to carrier phase noise. Muhi-antenna technique can be used to retain the system＇s performance. In this paper, the extensive application of QAM and the effect caused by phase noise are introduced. The analysis and simulation results are provided to illustrate the effect of phase noise on multi-antenna QAM systems. Besides, a close-form expression of the error vector magnitude （EVM） is provided, The analysis and simulation results can be used in the determination of phase noise specifications of multi-antenna QAM systems and the optimization of system performance.

作者：王学斌, 李会勇, 安琦, 何子述,

关键词：相位噪声, 正交振幅调制, 多天线, 误码率,