针对位置欺骗如何影响接收机的问题,使用TEXBAT(Texas Spoofing Test Battery)提供的 2 组无欺骗干扰场景数据集和2 组不同场景的GPS位置欺骗数据集,建立了GPS位置欺骗模型,分析了欺骗场景下两种相位对齐模式对欺骗攻击的影响;利用GNSS-SDR软件接收机对TEXBAT的原始高保真数字采样数据进行数据处理,分别得到软件接收机受欺骗与未受欺骗时的接收机载噪比、载波多普勒、码速率等随时间的变化情况;分析了两个位置欺骗场景对软件接收机跟踪阶段输出值的影响.实验结果表明,载噪比有大于 3(dB·Hz)的波动,码速率方差会发生阶段性的增加和减少;多普勒频率的变化取决于欺骗场景的选取,不同场景的位置欺骗从不同角度有效影响了接收机定位结果.
Impact Analysis of Positioning Spoof on Signal Tracking Parameters of Software Receiver
Aiming at the problem of how positioning spoof affects software receivers,two datasets of non-spoofing scenarios and two datasets of GPS positioning spoof provided by TEXBAT are used to analyze the influence of two phase alignment modes on spoofing attacks by establishing a positioning spoof model.GNSS-SDR,a software-de-fined receiver is utilized to process the TEXBAT datasets,acquiring the changes of carrier-to-noise ratio(C/N0),carrier doppler frequency and code rate over time when the GNSS-SDR is spoofed or not.The impact of positioning spoof on signal tracking parameters of GNSS-SDR is analyzed.The results show that the C/N0 fluctuates amony more than 3(dB·Hz)and the variance of the code rate decreases and increases periodically,and the variation of Doppler frequency depends on the selection of spoofing scenarios.Different positioning spoofs effectively affect the locations of the receivers from different aspects.
万方数据
维普
