一种基于相位噪声的MIMO OFDM辐射源个体识别方法

Method for Specific Emitter Identification Based on Phase Noise in MIMO OFDM System

对MIMO OFDM发射机进行分类识别时,针对现有方法识别正确率较低的不足,提出一种基于相位噪声的MIMO OFDM辐射源个体识别方法。首先,对由相位噪声导致的共同相位误差(Common Phase Error,CPE)进行估计;其次,提取CPE的方差和星座点错误矢量平均功率作为指纹特征并进行特征融合;最后,使用支持向量机进行分类识别。仿真实验结果表明,所提方法的识别正确率优于基于调制域错误、自回归滑动平均模型参数估计以及相位噪声功率谱密度的3种对比方法。

To improve the low accuracy of existing methods when classifying and identifying MIMO OFDM emitters,a novel specific emitter identification method based on phase noise is proposed.Firstly,the common phase error(CPE)caused by phase noise is estimated.Secondly,the variance of CPE and mean power of error vectors are extracted as fingerprints and feature fusion is conducted.Last,support vector machine is used for classification and identification.Simulation results suggest that the identification accuracy of the proposed method is higher than three contrast methods based on modulation error,parameters estimation of auto regressive moving average model and power spectrum density of phase noise.