基于谱线特征的MPSK调制识别

通信信号调制识别技术在军事和民用领域都具有重要的应用前景。针对5种经过均方根升余弦脉冲成形的数字相位调制信号,提出了一种实现调制方式自动识别的方法。该方法利用不同调制方式的数字信号做非线性变化后往往具有不同谱线特征的特点,得到了两个新的识别特征参数,为瞬时特征相似的数字相位调制信号的识别提供了新的手段。仿真结果表明,两个新特征参数是非常有效的,在信噪比大于8dB时,该方法的整体识别率不低于95%。

Modulation Recognition of MPSK Signals Based on Spectrum Line Feature

Digital modulation recognition finds important applications both in military and civil domains. For the five digital phase modulation signals shaped by square root raised consine, and algorithm for automatic recognition of modulation mode is proposed, which, based on different spectrum line features of the different digital modulation signals with the nonlinear transform, achieves two new modulation feature parameters, and provides a new means for the recognition of digital phase modulation signals with instantaneously similar features. The simulation result shows that this method could reach a correct recognition rate of no less than 95% when SNR is above 8 dB.