The Research Of Experiments On GPS Receiver Anti-spoofing Technologies

With the continuous development of global navigation satellite system,navigation technology has been used more and more widely in people's life.Among them,the development of the Beidou System of China and the global positioning system of USA are particularly rapid.However,the satellite signal has been greatly attenuated when it reaches the ground,and the civil navigation signal is open,which makes the civil receiver vulnerable to natural interference and human interference.Natural interference can not be avoided,and human interference,which includes jamming and spoofing,is more harmful.Aiming at spoofing,this paper takes the GPS civil receiver as the research object.In order to improve the anti-spoofing performance of the GPS civil receiver,this paper studies the anti-spoofing methods.In this paper,a variety of spoofing detection methods are mainly studied,and the effectiveness is verified by simulation and practical experiments.The main contents of this paper are as follows:1.The spoofing is classified and summarized.On the basis of this point,the influence of spoofing on the receiver is studied.At the same time,the existing anti-spoofing methods are summarized in a comprehensive way.2.Spoofing detection methods suitable for civil receivers are analyzed studied respectively.This paper focuses on SQM method,and proposes to use the detection window and discriminant proportion to reduce the misjudgment caused by the noise,and their validity are verified by simulation experiments.This paper also extends SQM method.3.This paper studied the spoofing strategy and the anti-spoofing strategy.The different ways to spoof receivers for spoofing signals and their graphic process are in detailed.A joint spoofing detection strategy is proposed,which can classify spoofing signals.4.The influence of the spoofing signal on the output value of correlator is analyzed theoretically,and spoofing detection method based on Doppler consistency monitoring is proposed,and theoretical and simulation experiments are carried out.The Doppler consistency monitoring module is added to the typical receiver tracking loop,which makes the receiver more robust.5.Detailed analysis of some factors of conducting spoofing detection experiments is presented with experiment hardware platform built.As for forward and intermediate spoofing interference,the actual spoofing attack scenes are designed.Then different experiment of spoofing detection are carried out.The validity of several spoofing detection methods are verified by digital signals obtained by the experiments.