基于谱线特征的恒包络数字调制方式识别方法

针对常见的恒包络数字通信信号,对其信号二次方与四次方形式的傅立叶谱线特征进行了理论分析,并在此基础上提出了一种针对恒包络数字通信信号的调制方式识别方法,其主要特点是不需要符号速率、载波初相、定时同步等先验信息,而且还能够区分线性调制和非线性调制.仿真实验表明该方法在较低信噪比条件下仍可以获得较高的正确识别率,具有很强的实用性.

Spectrum line based modulation classification for constant modulus digital modulation signals

Spectrum line feature of the constant modulus digital modulation signals was investigated.Based on spectrum line feature,a novel modulation classification approach for constant modulus digital modulation signals was proposed.The proposed approach doesn't need the prior knowledge of symbol rate,carrier phase,timing recovery,and so on,and can classify linear and nonlinear digital modulation schemes.Simulation results illustrated that the proposed approach could achieve satisfying classification performance even when the SNR was lower,which showed its feasiblility and practicality.