Experimental Study On Static And Quasi-dynamic GPS Spoofing

With the rapid development of mobile communications and technologies such as automobiles and Internet of Things in recent years,the application of GPS technology has not only been limited to military and traditional transportation and civil aviation,but it has penetrated into all walks of life and provided great convenience for our daily life.However,everything has two sides,and there are huge risks behind the wide application of GPS technology.Since the satellite is far away from the ground,when the GPS signal reaches the ground through more than 10,000 kilometers,the signal strength is extremely weak.At this time,it is easy to be subjected to various types of interference.Among these interferences,spoofing is the most threatening type.Deception jamming can generate a spoofing signal similar to the real signal structure in the attack to mislead the receiver to receive the signal,which is very concealed.In view of GPS deception jamming,most of the published literatures at home and abroad are about the introduction of the basic principles of deception jamming and the simulation analysis of the basic model.There are few literatures on the experimental research of GPS deception jamming.In the research of this paper,two kinds of deceptive interference experimental schemes are designed with GPS civilian receiver as the research object,and the feasibility is verified by experiments.1.Several different types of deception jamming are introduced.At the same time,the deception principle and basic model are analyzed and studied,and the application scenarios and implementation complexity of the existing deception jamming technology are compared.2.The general primary generated deception jamming method is improved.Based on the concept of suppressing interference,a key technology of BLWN suppression auxiliary interference which can be used in combination with primary deception jamming is adopted,this technology can affect the receiver in stable capture and tracking state,and based on this,the BLWN suppression assisted primary deception jamming scheme is proposed.3.The problem of signal synchronization and spoofing strategy in intermediategeneration spoofing interference is studied.The detailed calculation and derivation steps of signal power,code phase and Doppler shift are given in the process of signal synchronization.The signal alignment and stripping methods used in the implementation of the spoofing strategy are discussed.The spoofing strategy that can be taken in the actual spoofing scenario.4.The overall design and implementation flow of two deceptive interference experimental schemes are given.The effects of BLWN auxiliary interference signals and intermediate deception jamming signals on the receiver tracking loop are suppressed by theoretical derivation and simulation.It provides a reference for the parameter design of the deception signal in the deception jamming scheme.5.With the software defined radio(SDR)platform HackRF,the hardware environment needed for the deception experiment was built.The experimental experiments of the experimental scenarios of suppressing the primary deception jamming and the intermediate generation deception jamming were carried out.The validity of the two experimental schemes is verified by the analysis of the experimental results.