基于伪距信息的GNSS双接收机抗转发式欺骗干扰检测算法

发布时间：2018-05-28 08:05

本文选题：伪距 + 卫星导航　；参考：《系统工程与电子技术》2017年11期

【摘要】：在协同应用的背景下,提出基于伪距信息的全球卫星导航系统(global navigation satellite system,GNSS)双接收机抗欺骗干扰检测算法。首先,建立真实信号与欺骗干扰信号的信号模型,进而得到伪距双差模型。然后,利用卫星钟差计算公式得到卫星钟差双差计算模型。根据载噪比选择卫星信号,对测量伪距进行修正并利用最小二乘法进行导航定位解算,得到载体在ECEF坐标系中的位置。由测量伪距结合导航电文计算得到卫星的位置,进而得到卫星与载体之间的距离。最后由伪距双差、卫星与载体的距离双差以及卫星钟差双差计算得到误差值,基于误差值的明显差异性实现对信号的检测与判别。利用双接收机进行实际试验并结合Matlab进行仿真实验,仿真结果验证了算法的有效性和可行性,对试验中的欺骗干扰信号均能有效识别。
[Abstract]:Under the background of collaborative application, a global navigation satellite system GNSS dual-receiver anti-deception detection algorithm based on pseudo-range information is proposed. Firstly, the signal model of real signal and deceptive interference signal is established, and the pseudo-range double difference model is obtained. Then, the double difference calculation model of satellite clock difference is obtained by using the satellite clock error calculation formula. According to the carrier noise ratio, the satellite signal is selected, the pseudo-range measurement is corrected and the navigation and positioning solution is carried out by using the least square method, and the position of the carrier in the ECEF coordinate system is obtained. The position of the satellite is calculated by the pseudo-range measurement combined with the navigation message, and the distance between the satellite and the carrier is obtained. Finally, the error value is obtained by calculating the pseudo-range double difference, the distance double difference between the satellite and the carrier, and the satellite clock difference. The detection and discrimination of the signal are realized based on the obvious difference of the error value. The simulation results show that the algorithm is effective and feasible, and the deceptive jamming signals in the experiment can be recognized effectively.
【作者单位】：国防科技大学机电工程与自动化学院;
【基金】：教育部高等学校博士学科点专项科研基金(20124307110006)资助课题
【分类号】：TN965.5

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