一种三维调制信号快速解调新方法

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。

A new fast demodulation method of three-dimensional modulated signal

According to the character of three-dimensional modulated signal, a novel approach to the fast demodulation of three-dimensional modulated signal is pre s ented. The method is based on the Multiple Signal Classification (MUSIC) algori thm. Firstly, the covariance matrix of the array data is set up by using a sing le snapshot and secondly the signal space spectrum is decided according to the prior information of signal, then the polarization convergence angle and polariz ation phase angle are estimated, thus, the baseband signal is recovered. Simul ation results indicate that the proposed method avoids spectral search, further reduces the computational complexity and suits for modulation of fast moving signals.