Novel satellite navigation interference monitoring and positioning vehicle and interference monitoring method

Abstract

The invention discloses a novel satellite navigation interference monitoring and positioning vehicle and an interference monitoring method. The positioning vehicle comprises a vehicle-mounted platform, and pressing type interference monitoring and direction finding equipment, deception type interference monitoring and direction finding equipment, GNSS signal monitoring and anti-interference integrated equipment and auxiliary equipment which are mounted on the vehicle-mounted platform. According to the positioning vehicle disclosed by the invention, a high-precision direction finding technology in which spatial spectrum estimation and a correlation interferometer are fused is adopted for suppressing interference, and compared with traditional interference monitoring equipment, the direction finding precision of the positioning vehicle is higher.

Description

Technical Field

[0001] The invention belongs to the research field of satellite navigation interference monitoring and interference source positioning, and particularly relates to a novel satellite navigation interference monitoring and positioning vehicle and an interference monitoring method in this field. Background Art

[0002] The BeiDou system is an important infrastructure for establishing a time and space benchmark. In the civilian field, BeiDou navigation has been widely used in many industries such as civil aviation, navigation, surveying and mapping, water conservancy, and agricultural production, and has produced significant economic and social benefits. Therefore, once the satellite navigation system is interfered with or even paralyzed, it may cause significant losses to various industries. Therefore, it is of great significance to study the monitoring and positioning of satellite navigation interference. Most of the existing satellite navigation interference monitoring equipment can only monitor and locate single-system interference signals, and its investigation area is small, the working mode is single, and the positioning effect is poor. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a new type of satellite navigation interference monitoring and positioning vehicle and interference monitoring method, which breaks the limitations of the original interference monitoring equipment, achieves mobility and high precision, has both suppression interference monitoring and deception interference monitoring capabilities, and can monitor navigation service performance and ionospheric scintillation.

[0004] The present invention adopts the following technical solution: A new type of satellite navigation interference monitoring and positioning vehicle, the improvement of which is that it includes a vehicle-mounted platform and a suppression interference monitoring and direction-finding device, a deception interference monitoring and direction-finding device, a GNSS signal monitoring and anti-interference integrated device, and auxiliary equipment installed on the vehicle-mounted platform; The vehicle-mounted platform supplies power to various devices installed thereon through power supply equipment; The suppression interference monitoring direction finding equipment comprises an interference monitoring antenna and a suppression interference monitoring host electrically connected together; The deceptive interference monitoring and direction-finding device comprises a deceptive interference monitoring antenna and a deceptive interference monitoring and direction-finding host electrically connected together; The GNSS signal monitoring and anti-interference integrated device includes a host, a vehicle-mounted GNSS measurement antenna, an anti-interference and RDSS integrated antenna electrically connected together; The auxiliary equipment includes an on-board display screen electrically connected to the industrial control machine, an external interface box, a network switch and a communication module, and a communication antenna electrically connected to the communication module; The above-mentioned suppression interference monitoring host, deceptive interference monitoring direction finding host and host are respectively connected to the industrial control computer for communication.

[0005] Furthermore, the vehicle-mounted platform is an SUV vehicle-mounted platform.

[0006] Furthermore, the power supply equipment of the vehicle-mounted platform includes an integrated power supply, a battery pack, a silicon rectifier generator, a portable power supply, an interface wall box, a grounding cable and a power cable.

[0007] Furthermore, the suppression interference monitoring host of the suppression interference monitoring and direction finding device includes a radio frequency receiving module, a signal processing module, a power supply module and a main control module.

[0008] Furthermore, the deceptive interference monitoring antenna of the deceptive interference monitoring and direction finding device is a multi-element GNSS receiving antenna, and the deceptive interference monitoring and direction finding host includes a radio frequency receiving module, a signal processing module, a main control module and a power supply module.

[0009] Furthermore, the communication module of the auxiliary device is a 4G or 5G communication module, a LoRa self-organizing network communication module, or a Beidou short message module.

[0010] Furthermore, a lodging mechanism is installed on the roof of the vehicle-mounted platform, and an interface wall box, an interference monitoring antenna, a deceptive interference monitoring antenna, a vehicle-mounted GNSS measurement antenna, an anti-interference and RDSS integrated antenna, a communication module and a communication antenna are installed on the lodging mechanism.

[0011] An interference monitoring method uses the above-mentioned positioning vehicle, and its improvements are: the suppression interference monitoring direction-finding equipment monitors the suppression interference signal, identifies the modulation mode, center frequency, bandwidth and power of the signal, and performs direction-finding and positioning on the interference source; the deception interference monitoring direction-finding equipment monitors and identifies the deception interference signal, and performs direction-finding and positioning on the deception interference source; the GNSS signal monitoring and anti-interference integrated equipment monitors the GNSS signal and receives the GNSS service data, analyzes it, realizes its own navigation positioning, speed measurement and timing under interference conditions, and uses the navigation reception signal to realize the monitoring of ionospheric scintillation; the auxiliary equipment uploads or sends the interference monitoring data, and transmits the information back to the upper system, so as to realize the self-organizing network communication and data transmission in the area.

[0012] Furthermore, the working modes of the positioning vehicle include a single-vehicle mobile monitoring and positioning mode, a multi-vehicle joint monitoring and positioning mode, and a vehicle and drone joint monitoring and positioning mode.

[0013] The beneficial effects of the present invention are: The positioning vehicle disclosed in the present invention adopts a high-precision direction-finding technology that integrates spatial spectrum estimation and correlation interferometer to suppress interference. Compared with traditional interference monitoring equipment, its direction-finding accuracy is higher. For deceptive interference, deceptive interference detection technology based on correlation peaks and other information and deceptive interference direction-finding technology based on multi-antenna carrier phase difference measurement are adopted; anti-wideband interference technology and high-integration transceiver isolation technology are adopted, and in the process of interference source direction-finding and positioning, it itself will not be affected by interference; because the landing level of satellite navigation signals is very weak and mixed in the received signal and difficult to detect, the positioning vehicle disclosed in the present invention breaks through the limitations of weak interference detection technology and is easier to monitor satellite navigation weak interference signals than conventional radio monitoring methods; the GNSS interference source type intelligent identification technology based on radio fingerprint is adopted to solve the problems of low accuracy, weak real-time performance and low intelligence of interference feature identification of ordinary interference monitoring equipment; it can be combined with aerial drone satellite navigation interference monitoring system, ground fixed satellite navigation interference monitoring system and portable satellite navigation interference monitoring system to form a satellite navigation interference monitoring and interference source rapid investigation method coordinated by the sky and the earth.

[0014] The interference monitoring method disclosed in the present invention has the advantages of wide investigation range, multiple working modes, multi-system interference monitoring, good positioning effect, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the appearance of the positioning vehicle disclosed in the present invention; Figure 2 It is a schematic diagram of the composition of the positioning vehicle disclosed in the present invention; Figure 3 It is a structural schematic diagram of the roof of the positioning vehicle disclosed in the present invention; Figure 4 It is a working mode block diagram of the interference monitoring method disclosed in the present invention; Figure 5 It is a schematic diagram of intersection positioning of the interference monitoring method disclosed in the present invention. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0017] Example 1: This example discloses a new type of satellite navigation interference monitoring and positioning vehicle, which has the functions of satellite navigation suppression / deception interference monitoring, direction finding and positioning, and satellite navigation service performance monitoring. It is the first multifunctional integrated satellite navigation interference monitoring vehicle in China. It can be used independently to monitor and locate satellite navigation interference sources, and can also be used in combination with other equipment to locate interference sources. Figure 1 , as shown in 2, including a vehicle-mounted platform and a suppression interference monitoring and direction-finding device installed on the vehicle-mounted platform, a deception interference monitoring and direction-finding device, a GNSS signal monitoring and anti-interference integrated device, and auxiliary equipment; The vehicle-mounted platform supplies power to various devices installed thereon through power supply equipment; The suppression interference monitoring and direction-finding equipment includes an interference monitoring antenna and a suppression interference monitoring host electrically connected together; the interference monitoring antenna can monitor the existing interference within the navigation frequency band and measure the direction of the interference signal. The suppression interference monitoring host is composed of a radio frequency receiving module, a signal processing module, a power supply module, a main control module, etc., which is used to realize the functions of analyzing, processing, storing and transmitting the signals received by the above antenna.

[0018] The deceptive interference monitoring and direction-finding device comprises a deceptive interference monitoring antenna and a deceptive interference monitoring and direction-finding host electrically connected together; The GNSS signal monitoring and anti-interference integrated equipment includes an electrically connected host, a vehicle-mounted GNSS measurement antenna, an anti-interference and RDSS integrated antenna and supporting cables; the vehicle-mounted GNSS measurement antenna completes the reception of various navigation satellite signals; the anti-interference and RDSS integrated antenna completes the anti-interference signal reception and processing, RDSS signal monitoring and transmission, and communication functions; the host completes satellite navigation signal down-conversion, baseband signal processing, navigation solution and other functions. The host can realize equipment control through the communication interface, complete status monitoring and parameter setting, and the communication interface between the host and the industrial computer is the serial port and the network port.

[0019] The auxiliary equipment includes an on-board display screen electrically connected to the industrial computer (on-board server), an external interface box, a network switch and a communication module, and a communication antenna electrically connected to the communication module; it is used to realize the functions of positioning vehicle data reception and storage, data management, control, display, comprehensive processing, and data transmission.

[0020] The above-mentioned suppression interference monitoring host, deceptive interference monitoring direction finding host and host are respectively connected to the industrial control computer for communication.

[0021] In this embodiment, the vehicle-mounted platform is an SUV vehicle-mounted platform, which is refitted and designed from a vehicle platform. The SUV vehicle-mounted platform includes a vehicle, hardware equipment, power supply and distribution equipment, and other auxiliary equipment. The hardware equipment consists of vehicle-mounted monitoring and direction-finding equipment, vehicle-mounted equipment, and related cables. Other auxiliary equipment includes grounding piles, electrician tools, machine tools, tire repair tools, and other auxiliary equipment and tools. It is used to carry operators and various types of navigation interference monitoring and direction-finding equipment, provide a working environment, and can quickly maneuver to complete tasks such as fixed-point, mobile, and regional patrol monitoring, and realize large-scale mobile interference monitoring and troubleshooting positioning.

[0022] The power supply equipment of the vehicle-mounted platform includes an integrated power supply, a battery pack, a silicon rectifier generator, a portable power supply, an interface wall box, a grounding cable and a power cable.

[0023] The deceptive interference monitoring antenna of the deceptive interference monitoring and direction finding equipment is a multi-element GNSS receiving antenna that can simultaneously receive the real and deceptive satellite navigation signals of GPS and Beidou frequency bands. It is specially designed to reduce the gain at the zenith and increase the gain at low elevation angles to ensure that deceptive interference signals can be received and improve the detection performance of deceptive interference. The deceptive interference monitoring and direction finding host includes a radio frequency receiving module, a signal processing module, a main control module, and a power supply module. These modules are used to parse, process, store, and transmit the deceptive interference signals received by the deceptive interference monitoring antenna.

[0024] The communication modules of the auxiliary equipment are 4G or 5G communication module, LoRa self-organizing network communication module, and Beidou short message module.

[0025] like Figure 3 As shown, a lodging mechanism 2 is installed on the roof of the vehicle-mounted platform 1, and an interface wall box 3, an interference monitoring antenna 4, a deceptive interference monitoring antenna 5, a vehicle-mounted GNSS measurement antenna 6, an anti-interference and RDSS integrated antenna 7, a communication module 8 and a communication antenna 9 are installed on the lodging mechanism.

[0026] In summary, the satellite navigation interference monitoring and positioning vehicle of this embodiment realizes for the first time the integration of multiple functions such as suppression interference monitoring direction finding, deception interference monitoring direction finding, GNSS service performance monitoring, ionospheric scintillation monitoring, and anti-interference. Moreover, the positioning vehicle can not only realize large-scale rapid interference investigation alone, but also can be combined with other equipment to carry out joint positioning and search of multiple interference sources, complete tasks such as fixed-point, mobile, and regional patrol monitoring, and effectively ensure the safety of satellite navigation applications in important occasions or activities. It can quickly realize monitoring direction finding and precise positioning of suppression deception interference in complex environments, and be used as a fixed-point monitoring simulation monitoring station in large-scale activities to ensure the safe application of satellite navigation in activities; the positioning vehicle itself has strong anti-interference capabilities and can realize self-positioning in complex electromagnetic environments; all monitoring and positioning equipment are mounted on SUV vehicles, with high integration and easy use; and the positioning vehicle can be used as a fixed monitoring station for interference source monitoring, and can also realize large-scale mobile investigation.

[0027] This embodiment also discloses an interference monitoring method, using the above-mentioned positioning vehicle, the suppression interference monitoring and direction-finding equipment monitors the suppression interference signal, identifies the signal modulation mode, center frequency, bandwidth and power and other information, and performs direction-finding and positioning on the interference source; the deception interference monitoring and direction-finding equipment monitors and identifies the deception interference signal, and performs direction-finding and positioning on the deception interference source; the GNSS signal monitoring and anti-interference integrated equipment monitors the GNSS signal and receives the GNSS service data, analyzes it, realizes its own navigation positioning, speed measurement and timing under interference conditions, uses the navigation reception signal to realize the monitoring of ionospheric scintillation, and has anti-interference capability and navigation service performance monitoring capability; the auxiliary equipment communicates with the superior command system, uploads or sends the interference monitoring data, and transmits the vehicle-mounted data processing terminal information back to the superior system, realizes the regional networking collaborative positioning, self-organizing network communication and data transmission.

[0028] like Figure 4 As shown in the figure, the working modes of the positioning vehicle include single-vehicle mobile monitoring and positioning mode, multi-vehicle joint monitoring and positioning mode, and vehicle and drone joint monitoring and positioning mode. All three working modes can detect and locate fixed interference sources, while the monitoring and positioning of mobile interference sources requires the use of multi-vehicle joint mode or vehicle and drone joint mode. Figure 5 As shown, two vehicles are used to jointly monitor and locate fixed interference sources. Vehicle A and vehicle B monitor and scan the surrounding environment from different positions respectively, so as to quickly realize the intersection location of interference source C in the environment.

Claims

1. A new type of satellite navigation interference monitoring and positioning vehicle, characterized by: Including vehicle-mounted platforms and suppression interference monitoring and direction-finding equipment installed on the vehicle-mounted platforms, deceptive interference monitoring and direction-finding equipment, GNSS signal monitoring and anti-interference integrated equipment, and auxiliary equipment; The vehicle-mounted platform supplies power to various devices installed thereon through power supply equipment; The suppression interference monitoring direction finding equipment comprises an interference monitoring antenna and a suppression interference monitoring host electrically connected together; The deceptive interference monitoring and direction-finding device comprises a deceptive interference monitoring antenna and a deceptive interference monitoring and direction-finding host electrically connected together; The GNSS signal monitoring and anti-interference integrated device includes a host, a vehicle-mounted GNSS measurement antenna, an anti-interference and RDSS integrated antenna electrically connected together; The auxiliary equipment includes an on-board display screen electrically connected to the industrial control machine, an external interface box, a network switch and a communication module, and a communication antenna electrically connected to the communication module; The above-mentioned suppression interference monitoring host, deceptive interference monitoring direction finding host and host are respectively connected to the industrial control computer for communication.

2. The new satellite navigation interference monitoring and positioning vehicle according to claim 1 is characterized in that: The vehicle-mounted platform is an SUV vehicle-mounted platform.

3. The new satellite navigation interference monitoring and positioning vehicle according to claim 1 is characterized in that: The power supply equipment of the vehicle-mounted platform includes an integrated power supply, a battery pack, a silicon rectifier generator, a portable power supply, an interface wall box, a grounding cable and a power cable.

4. The new satellite navigation interference monitoring and positioning vehicle according to claim 1 is characterized in that: The suppression interference monitoring host of the suppression interference monitoring and direction finding equipment includes a radio frequency receiving module, a signal processing module, a power supply module and a main control module.

5. The new satellite navigation interference monitoring and positioning vehicle according to claim 1 is characterized in that: The deceptive interference monitoring antenna of the deceptive interference monitoring and direction finding device is a multi-element GNSS receiving antenna, and the deceptive interference monitoring and direction finding host includes a radio frequency receiving module, a signal processing module, a main control module and a power module.

6. The new satellite navigation interference monitoring and positioning vehicle according to claim 1 is characterized by: The communication modules of the auxiliary equipment are 4G or 5G communication module, LoRa self-organizing network communication module, and Beidou short message module.

7. The new satellite navigation interference monitoring and positioning vehicle according to claim 3 is characterized by: A lodging mechanism is installed on the roof of the vehicle-mounted platform, and an interface wall box, an interference monitoring antenna, a deceptive interference monitoring antenna, a vehicle-mounted GNSS measurement antenna, an anti-interference and RDSS integrated antenna, a communication module and a communication antenna are installed on the lodging mechanism.

8. An interference monitoring method, using the positioning vehicle according to claim 1, characterized in that: The suppression interference monitoring and direction-finding equipment monitors the suppression interference signals, identifies the signal modulation mode, center frequency, bandwidth and power, and performs direction-finding and positioning of the interference sources; the deception interference monitoring and direction-finding equipment monitors and identifies deception interference signals, and performs direction-finding and positioning of deception interference sources; the GNSS signal monitoring and anti-interference integrated equipment monitors GNSS signals and receives GNSS service data, analyzes it, realizes its own navigation positioning, speed measurement and timing under interference conditions, and uses the navigation reception signal to realize the monitoring of ionospheric scintillation; the auxiliary equipment uploads or sends interference monitoring data, and transmits the information back to the superior system to realize self-organizing network communication and data transmission within the area.

9. The interference monitoring method according to claim 8, characterized in that: The working modes of the positioning vehicle include single-vehicle mobile monitoring and positioning mode, multi-vehicle joint monitoring and positioning mode, and vehicle and UAV joint monitoring and positioning mode.

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