生成式GPS欺骗干扰算法设计与软件无线电的实现  

Design of Generative GPS Spoofing Algorithm and Implement by Software Defined Radio

作　　者：芮梓轩 汪海兵 曾芳玲 徐煦 RUI Zixuan;WANG Haibing;ZENG Fangling;XU Xu(College of Electronic Engineering,National University of Defense Technology,Hefei 230037,China)

机构地区：[1]国防科技大学电子对抗学院,安徽合肥230037

出　　处：《无线电工程》2023年第7期1652-1659,共8页Radio Engineering

基　　金：十三五装备预研领域基金(61403110306)。

摘　　要：为了实现对全球定位系统(GPS)接收机的位置欺骗与轨迹欺骗,研究生成式GPS欺骗干扰的干扰效果,设计并基于软件无线电平台实现了一种具备位置欺骗功能以及轨迹欺骗功能的GPS欺骗信号产生算法,在下载星历数据后,通过预设欺骗点坐标,逆推欺骗点上空可视卫星以及对应的伪距与码相位,根据真实GPS卫星信号格式生成欺骗干扰信号并模拟钟差、电离层等因素对信号传播的影响对接收机进行欺骗。GPS欺骗信号在7 cm×15 cm模块上生成,实现12路卫星信号输出,同时对各路信号发射功率进行修正,与传统的单通道GPS欺骗设备相比生成信号更加接近真实的GPS信号,摆脱了上位机的限制,实现了欺骗干扰设备的小型化与集成化。使用雷格瑞GPS接收机作为欺骗测试目标,实验结果表明,在欺骗信号产生板发射欺骗信号后,接收机成功被欺骗且定位坐标与预设欺骗坐标误差为19 m,轨迹欺骗能够使接收机定位结果按照预设轨迹移动。研究成果对GPS欺骗干扰技术发展具有一定意义。In order to realize the position spoofing and trajectory spoofing of GPS receiver and explore the interference effect of generative GPS spoofing jamming,a GPS spoofing signal generation algorithm with positioning spoofing and trajectory spoofing function is designed and implemented based on the SDR platform.After downloading ephemeris data,the visual satellite over the spoofing point and the corresponding pseudo range and code phase is inverse calculated according to preset spoofing coordinates.The spoofing jamming signal is generated according to the real GPS satellite signal format,and the influence of clock error,ionosphere and other factors on signal propagation are simulated to spoof the receiver.The GPS spoofing signal is generated on the 7 cm×15 cm module which output 12 channels of satellite signals at the same time,the transmitting power of each channel of signal is corrected.The spoofing signal will have a smaller difference with the real GPS signal compared with the signal generated from the conventional spoofing equipment which has only one output channel.In the meantime,this module gets rid of the restrictions of the upper computer and realizes the miniaturization and integration of the equipment.The Legray GPS receiver is used as the GPS spoofing test target.The experimental results show that after the spoofing signal generation board transmits the spoofing signal,the receiver is successfully deceived,and the error between the positioning coordinate and the preset spoofing coordinate is 19 m.The trajectory spoofing made the positioning result of the receiver move according to the preset trajectory successfully.The research results have certain significance for the development of GPS spoofing and jamming technology.

关 键 词：GPS欺骗 卫星星历 轨迹欺骗 位置欺骗 软件无线电平台 

分 类 号：TN96[电子电信—信号与信息处理]