Study Of Multi-station Distributing Methods Based On GNSS Spoofing-signal Retransmission For Immovable Target Protection

With the wide utilization of GNSS(Global Navigation Satellite System),the spoofing attack based on navigation satellite signal has aroused more and more attention for its disguised-broadcasting,easy-implementing and marvelous-jeopardizing characteristics.After the Iranian successfully captured the UAV(Unmanned Aviation Vehicle)from US(United States),nowadays,North Koera utilizes the spoofing attack and jamming method to interference the military maneuver hold by South Koera and US comes to an effective result.These affairs have made the spoofing and anti-spoofing attack technique a heated spot under the circumstance of informatization war.Standing by this background,this paper proposes an engineering-doable multiple stations retransmission spoofing manner initially,then makes researches on the distribution manner and puts forward a distributing manner which shows feasibility to against IMU based anti-jamming systems.Additionally,the signal source test results illustrate the effectiveness of the proposed method which can successfully guide the target to the intended position.This paper mainly makes the research from three different aspects which listed below:(1)The station distributing manner based on retransmittion spoofing attack is considered initally.Previous techniques in this area are single retransmission station based and the station's geography coordinate is restricted in a certain limitation seriously.In this paper,we propose an engineering-doable multiple stations based on retransmission spoofing manner.With this distribution method not only overcomes these problems but also achieves the goal of immovable target protection which improves the effectiveness of the implemtation of the proposed method.(2)GNSS intermediate spoofing attack is becoming much more popular because the signal it retransmits has the same format with the real signal.Consequently,it is comparatively hard to detect by the detection method based on signal threshold setting.However,GNSS intermediate spoofing attack method cannot ensure the ratio of neighbouring radius between the reality position and mapped position closes to one,which could be easily distinguished by GNSS and inertial navigation system(INS)united based anti-jamming system of the weapon's receiver.In this paper,the most prior ratio of neighbouring radius is studied based on Newton iteration method with the proposed multiple stations distribution manner of GNSS intermediate spoofing attack.Simulation results show the ratio of neighbouring radius between the reality position and mapped position closes to one which proves its feasible performance towards GNSS+INS based anti-jamming system.(3)Because all the content of this paper is built on the basement of accuracy of delay broadcasting,there is no though analysis on how the delay is controlled wheas there is no reality environment experiment like signal source experiment and etc.This paper makes thouorgh analysis on the assumptions of the capture manner of capturing UAV.By denying the method of broadcasting the spoofing signals directly,this paper gives a possible and effective manner of capturing UAV: predict the UAV flying track firstly,then broadcast suppression jamming in order to make the UAV receiver lost track with the GPS P(Y)code,finally release GPS C/A spoofing signals to manage the capture.In this paper,the relationship among the UAV flying track,GNSS intended track and the spoofed track is analyzed.Signal source test result illustrates the effectiveness of the proposed manner which can successfully guides the target to the position intended which proves the feasibility of the proposed manner to capture UAV.These quantized analyses are firstly proposed in navigation circle which have great meaning to the study of GNSS spoofing attack.Finally,we summarize the contributions and the results at the end of this paper while pointing out the drawback of the proposed method and looking forward to the future work.The contributions of this paper will guide the parameter demonstration and scheme expoundation for the programs of navigaition war and spoofing attack.