一种三维调制信号快速解调新方法  

A New Fast Demodulation Method of Three-dimensional Modulated Signal

作　　者：张俊博[1] 宋汉斌 陈晓光[1] 

机构地区：[1]复旦大学通信科学与工程系,上海200433 [2]上海无线电设备研究所微波工程部,上海200090

出　　处：《电讯技术》2013年第5期597-602,共6页Telecommunication Engineering

摘　　要：根据三维调制信号的特性,提出了一种新的三维调制信号的快速解调方法。该方法基于MUSIC算法,首先利用单次快拍来建立阵列数据的协方差矩阵,然后根据调制信号的先验信息对所得信号空间谱进行判决,来估计其极化辅角与极化相位角等信息,从而恢复出基带信号。分析与仿真结果表明,所提方法不仅可以避免谱搜索,大大降低MUSIC方法的运算量,而且适用于瞬时信号和快速运动信号的解调。According to the character of three-dimensional modulated signal, a novel approach to the fast demod- ulation of three-dimensional modulated signal is presented. The method is based on the Multiple Signal Classifi- cation （MUSIC） algorithm. Firstly, the covariance matrix of the array data is set up by using a single snapshot and secondly the signal space spectrum is decided according to the prior information of signal, then the polariza- tion convergence angle and polarization phase angle are estimated, thus, the baseband signal is recovered. Sim- ulation results indicate that the proposed method avoids spectral search, further reduces the computational com- plexity and suits for modulation of fast moving signals.

关 键 词：极化阵列天线 三维调制解调器 MUSIC算法 矢量天线 单快拍 基带信号 

分 类 号：TN761[电子电信—电路与系统] TN911.7