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多相关器联合功率GNSS欺骗干扰检测方法研究

赵慎 廖一霏 李世玲 周开军

赵慎, 廖一霏, 李世玲, 周开军. 多相关器联合功率GNSS欺骗干扰检测方法研究[J]. 全球定位系统, 2024, 49(4): 66-74. doi: 10.12265/j.gnss.2023235
引用本文: 赵慎, 廖一霏, 李世玲, 周开军. 多相关器联合功率GNSS欺骗干扰检测方法研究[J]. 全球定位系统, 2024, 49(4): 66-74. doi: 10.12265/j.gnss.2023235
ZHAO Shen, LIAO Yifei, LI Shiling, ZHOU Kaijun. Research on GNSS spoofing interference detection for multi-correlator combined power[J]. GNSS World of China, 2024, 49(4): 66-74. doi: 10.12265/j.gnss.2023235
Citation: ZHAO Shen, LIAO Yifei, LI Shiling, ZHOU Kaijun. Research on GNSS spoofing interference detection for multi-correlator combined power[J]. GNSS World of China, 2024, 49(4): 66-74. doi: 10.12265/j.gnss.2023235

多相关器联合功率GNSS欺骗干扰检测方法研究

doi: 10.12265/j.gnss.2023235
基金项目: 国家自然科学基金项目(61976088);湖南省教育厅科学研究项目(23A0464);湖南省研究生科研创新项目(QL20230271)
详细信息
    作者简介:

    赵慎:(1983—),男,博士,研究方向为阵列信号处理、导航时空信息安全. E-mail: zhaoshen_nudt@163.com

    廖一霏:(2000—),女,研究生,研究方向为导航时空信息安全. E-mail: liaoyifeifeifei@163.com

    李世玲:(1991—),女,博士,研究方向为多智能体系统非合作博弈. E-mail: lishilingjjwai@163.com

    周开军:(1979—),男,教授,研究方向为仿生视觉信息处理、生物特征识别. E-mail: zkj@hutb.edu.cn

    通信作者:

    廖一霏 E-mail: liaoyifeifeifei@163.com

  • 中图分类号: P228;TN972

Research on GNSS spoofing interference detection for multi-correlator combined power

  • 摘要: GNSS民用信号因其公开性和脆弱性易受外界欺骗干扰. 作为欺骗干扰检测的有效方法,信号质量监测(signal quality monitoring,SQM)技术通过检测接收机跟踪环路早码、即时码、晚码(early late phase,ELP)的相关结果,与无欺骗时的相关特性对比,判断是否存在欺骗干扰. 常规SQM算法仅利用ELP三个信息,检测性能受限,为此提出多相关器联合功率(SQM detection of power combined Multi-correlator groups,SPCM)算法. 以ELP之间多个等间隔相关器输出功率的加权为检测量,且取相关时刻与即时码时间差的反比为加权系数;进一步分析检测量的概率分布特性,并基于Neyman-Pearson理论确定最佳检测阈值,通过比较检测量与检测阈值的大小,判断是否存在欺骗干扰. 基于美国德克萨斯大学奥斯汀分校公开的场景四数据集进行试验,结果表明:与Ratio和ELP等典型SQM算法相比,在不同虚警率条件下,所提出SPCM算法兼具高检测概率和快速预警响应时间性能.

     

  • 图  1  欺骗攻击示意图

    图  2  多相关器实现框图

    图  3  不同自由度下的卡方分布

    图  4  SPCM检测量输出分布

    图  5  SPCM算法检验流程图

    图  6  61个相关器随时间变化的相关幅度输出图

    图  7  PRN6载噪比变化曲线

    图  8  传统SQM检测量示意图

    图  9  SPCM检测量随时间变化图

    图  10  检测概率对比

    图  11  ROC曲线对比

    图  12  不同检测量的二元判决结果

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出版历程
  • 收稿日期:  2023-12-25
  • 录用日期:  2023-12-25
  • 网络出版日期:  2024-07-05

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