无线信道对辐射源个体特征提取的影响及应对方法  

The Influence of Wireless Channel on Feature Extraction of Specific Emitter and Its Countermeasures

作　　者：白翔 许从方 熊坤 谢烨 BAI Xiang;XU Congfang;XIONG Kun;XIE Ye(China Electronic Technology Cyber Security Co.,Ltd.,Chengdu Sichuan 610041,China)

机构地区：[1]中国电子科技网络信息安全有限公司,四川成都610041

出　　处：《通信技术》2021年第10期2306-2315,共10页Communications Technology

基　　金：四川省科技厅重点研发项目(2018YZ0071);四川省科技厅国际科技创新合作项目(2019YFH0163)。

摘　　要：针对多普勒效应的射频特征提取算法在多普勒频偏和多普勒扩展较大时,射频特征识别算法性能会急剧下降的问题,分析了无线信道模型及多普勒效应对辐射源射频指纹特征提取的影响,提出了在多普勒效应下的特征提取方法。该方法能有效防止过大的多普勒频偏对I/Q星座的影响。此外,建立了实验验证环境,对30类辐射源通信设备经过信道模型和多普勒效应后的特征进行识别,识别率可以达到80%以上,验证了提出方法的有效性。In order to solve the problem that the performance of RF feature recognition algorithm will decline sharply when Doppler frequency offset and Doppler spread are large,this paper analyzes the influence of wireless channel model and Doppler effect on RF fingerprint feature extraction of specific emitter,and proposes a feature extraction method under Doppler effect.This method can effectively prevent the influence of excessive Doppler frequency offset on the I/Q constellation.In addition,an experimental verification environment is established to identify the characteristics of 30 types of communication equipment of emitters after channel model and Doppler effect.The recognition rate can reach more than 80%.Therefore,the effectiveness of the proposed method is verified by experiments.

关 键 词：辐射源 多普勒效应 无线信道模型 相位校正 

分 类 号：TP391.44[自动化与计算机技术—计算机应用技术]