海洋测绘2023，Vol.43Issue(6)：56-60,5.DOI:10.3969/j.issn.1671-3044.2023.06.013
基于子空间相关运算的GNSS欺骗干扰检测研究
GNSS spoofing detection based on subspace correlation operation
摘要
Abstract
Aiming at the deception jamming problem faced by GNSS system,a detection algorithm of GNSS navigation signal deception jamming based on subspace correlation is proposed.This method takes the intermediate frequency sampling signal of single period pseudo-random sequence as the sample,obtains multiple groups of sampling sequences according to the set Doppler frequency shift search step,calculates the auto-correlation matrix,and constructs the signal subspace based on pseudo-random sequence through eigenvalue decomposition.The known pseudo-random sequence cyclic displacement is used to perform correlation operation on the signal subspace,and the number of correlation peaks is used to determine whether there is deception interference.The simulation results verify the effectiveness of the algorithm,and verify the robustness of the algorithm from the search range,search step size,signal-to-noise ratio and other aspects.The results show that the method can better suppress the influence of the Puller frequency shift of the signal,and still has high detection accuracy in the case of low signal-to-noise ratio.关键词
全球导航卫星系统/电子对抗/欺骗干扰/欺骗检测/信号子空间/特征值分解Key words
GNSS/electronic countermeasure/spoofing jamming/spoofing detection/signal subspace/eigenvalue decomposition分类
天文与地球科学引用本文复制引用
刘拥军,马青松,杨斌..基于子空间相关运算的GNSS欺骗干扰检测研究[J].海洋测绘,2023,43(6):56-60,5.基金项目
2020年度河南省重点研发与推广专项(科技攻关)项目(202102210114). （科技攻关）
