BOC接收机捕获阶段转发式欺骗信号检测算法

发布时间：2018-04-09 04:07

本文选题：GNSS　切入点：转发式欺骗干扰　出处：《全球定位系统》2016年05期

【摘要】：针对卫星导航BOC调制接收机捕获阶段存在转发式欺骗干扰信号的检测问题,提出了一种基于相关峰个数判别及功率大小分析的检测算法。该算法是利用捕获阶段存在相关峰的个数与是否存在干扰信号密切相关,通过欺骗信号功率高于真实信号来建立检测模型,给出了判决门限的计算方法及ROC曲线,实现了转发式欺骗干扰信号的检测。仿真表明,随着接收机相关值后积累次数及欺骗信号相对于真实信号功率强度的增加,该算法的检测概率越高,可在欺骗干扰信号功率高于真实信号功率4dB时,在0.7%的虚警概率下实现95%以上的检测概率,对捕获阶段的转发式欺骗信号具有较好的检测效果。
[Abstract]:A detection algorithm based on correlation peak number discrimination and power analysis is proposed to detect the transmitted spoofing interference signal in the acquisition phase of satellite navigation BOC modulation receiver.The algorithm uses the number of correlation peaks in the capture phase to be closely related to the existence of interference signals. The detection model is established by using the deceptive signal power higher than the real signal, and the calculation method of the decision threshold and the ROC curve are given.The detection of forward spoofing jamming signal is realized.Simulation results show that the higher the detection probability of the algorithm is, the higher the detection probability is, and the higher the detection probability is, when the deceptive interference signal power is higher than the real signal power 4dB, with the increase of the accumulated times after the receiver correlation value and the deceptive signal relative to the real signal power.Under the false alarm probability of 0.7%, the detection probability is more than 95%, which has a good detection effect on the forwarder spoofing signal in the capture stage.
【作者单位】：国防科技大学电子科学与工程学院;
【分类号】：P228.4

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