MPSK信号的循环谱检测及码元速率估计

Detection and chip rate estimation of MPSK signals based on cyclic spectral density

在循环平稳理论的基础上,根据MPSK信号的循环平稳特性及其在普通傅里叶频率和循环频率双频率平面上所表现出的谱线特征,提出了一种在低信噪比下,利用两次谱峰搜索完成对MPSK信号的检测及载频和码元速率估计的新方法。该方法估计精度高,计算机仿真证明了该方法的有效性。

According to the cyclostationarity of MPSK signal and the characteristics of the spectral lines on the bifrequency plane and based on the cyclostationary theory, a novel method of detection and parameter estimation by two-time searching for the spectral peak in particularly difficult environments is proposed. The high estimating accuracy of this method is proved by computer simulations.