KR102491950B1 - Jamming detection device for detecting noise jamming and deception jamming using an inertial navigation device, and jamming detection system including the same - Google Patents

Abstract

A jamming detection device according to an embodiment of the present invention comprises: an antenna for receiving a plurality of satellite signals from a satellite constellation through a plurality of satellite channels; a noise detection unit for detecting noise jamming based on the plurality of satellite signals received through the antenna; a deception detection unit for detecting deception jamming based on the plurality of satellite signals received through the antenna; a control unit for generating a notification signal when at least one of the noise jamming and the deceptive jamming is detected; and a wireless communication unit for transmitting the notification signal to a user device.

Description

A jamming detection device for detecting noise jamming and deceptive jamming using an inertial navigation device, and a jamming detection system including the same

An embodiment of the present invention is a jamming detection device for detecting noise jamming and deception jamming using an inertial navigation device and a jamming detection system including the same, in particular, a noise detection unit detects a noise signal and the deception detection unit detects a pseudorange for each channel of a satellite and a jamming detection device capable of simultaneously detecting noise jamming and deceptive jamming by detecting a spoofing signal by comparing a measured distance measured by an inertial navigation device, and a jamming detection system including the same.

Recently, Electronic Warfare (EW) has become the core of modern warfare, and jamming refers to an electronic attack (EA) that disrupts enemy communications.

In particular, GPS jamming attacks such as noise jamming and deception are gradually increasing in relation to a Global Navigation Satellite System (GNSS) (eg, Global Positioning System (GPS)).

The biggest reason for such GPS jamming is that the distance between a GPS satellite operating in a high orbit of 20,200 km above the ground and a GPS receiver operating on the ground is very long, and the GPS jammer is operated relatively close to the GPS receiver. Analyzing the link budget, since the propagation loss is very large due to the distance between the GPS satellite and the GPS receiver, the GPS receiver is vulnerable to both noise jamming and deceptive jamming, even though the GPS receiver has a processing gain.

Types of GPS jamming are largely divided into noise jamming and deception jamming. Noise jamming is to make navigation service impossible by transmitting a noise signal greater than the GPS signal strength to a GPS signal band (eg, part or all of the GPS signal band) or an adjacent band.

Spoofing and Meaconing are typical examples of deceptive jamming. Spoofing is to transmit a simulated navigation signal generated identically to a GPS signal at a higher strength than an actual GPS signal to cause location information error. Meaconing is to receive a GPS signal, delay the time, and re-output to disturb the route.

In order to cope with such GPS jamming, EGI (Embedded GPS/INS (Inertial Navigation System)), but these devices have anti-jamming and/or anti-jamming capabilities for GPS receivers mounted on their own platforms. function was not retained.

Patent Document 1 is an invention related to a real-time GPS jamming detection system and method using a multi-channel GPS antenna and receiver, and discloses a system for detecting a spoofing signal using only a GPS receiver.

Patent Document 2 is an invention related to a wireless communication channel monitoring system and method using cooperative jamming and spoofing, and discloses a system that detects an illegal communication signal and emits a spoofing signal to disrupt communication, rather than detecting jamming and spoofing signals. are doing

Patent Document 3 is an invention related to a real-time GPS jamming detection system and method using a multi-channel GPS antenna and receiver, and discloses a system for comparing an acceleration value of a GPS receiver and an acceleration value of an accelerometer.

Korean Patent Registration No. 10-1862934 'Real-time GPS jamming detection system and method using multi-channel GPS antenna and receiver' (published on April 26, 2018) Korean Patent Publication No. 10-2020-0050652 'Wireless communication channel monitoring system and method using cooperative jamming and spoofing' (published on May 12, 2020) Korean Patent Registration No. 10-1862934 'Real-time GPS jamming detection system and method using multi-channel GPS antenna and receiver' (published on April 26, 2018)

An object of the present invention is to provide a jamming detection system capable of detecting noise jamming and deceptive jamming using an inertial navigation device.

Another object of the present invention is to provide a jamming detection system capable of simultaneously detecting noise jamming and deceptive jamming using a single antenna.

An apparatus for detecting jamming according to an embodiment of the present invention includes an antenna for receiving a plurality of satellite signals through a plurality of satellite channels from an artificial satellite group; a noise detection unit configured to detect noise jamming based on the plurality of satellite signals received through the antenna; a spoof detection unit for detecting spoof jamming based on the plurality of satellite signals received through the antenna; a control unit configured to generate a notification signal when at least one of the noise jamming and the deceptive jamming is detected; and a wireless communication unit for transmitting the notification signal to a user device.

In the present invention, the noise detector may include: a signal processor for deriving a signal strength according to a frequency band of each of the plurality of satellite signals; and a noise determining unit configured to determine that the noise jamming has occurred when the signal strength is greater than or equal to the reference strength.

In the present invention, the signal processing unit derives the signal strength as a voltage value, and the noise determination unit compares the voltage value derived by the signal processing unit with a preset threshold voltage value so that the voltage value is the threshold voltage If it is greater than or equal to the value, it is characterized in that it is determined that noise jamming has occurred.

In the present invention, the spoofing detection unit may include: a measurement unit for measuring a pseudorange of each of the plurality of satellite channels based on the plurality of satellite signals; a calculation unit for calculating an estimated pseudorange of each of the plurality of satellite channels based on coordinate information received from an inertial navigation device; a comparator for comparing the pseudorange and the estimated pseudorange for each of the plurality of satellite channels; and a spoofing determination unit configured to determine that the spoofing jamming has occurred when the difference between the pseudorange and the estimated pseudorange is equal to or greater than a reference value.

In the present invention, the spoofing determining unit determines that the spoofing jamming has occurred in a corresponding channel when a difference between the pseudorange and the estimated pseudorange for at least one of the plurality of satellite channels is greater than or equal to a reference value. do.

In the present invention, the wireless communication unit is characterized in that the notification signal is transmitted to the user device using a synchronous data link control communication method.

A jamming detection system according to an embodiment of the present invention includes a jamming detection device for detecting noise jamming and deceptive jamming using an inertial navigation device; and an inertial navigation device for detecting a position of the jamming detection device, wherein the jamming detection device includes: an antenna for receiving a plurality of satellite signals from an artificial satellite group through a plurality of satellite channels; a noise detection unit configured to detect the noise jamming based on the plurality of satellite signals received through the antenna; a spoof detection unit configured to detect the spoof jamming based on the plurality of satellite signals received through the antenna; a control unit configured to generate a notification signal when at least one of the noise jamming and the deceptive jamming is detected; and a wireless communication unit for transmitting the notification signal to a user device.

In the present invention, the noise detection unit may include: a signal processing unit for deriving a signal strength according to a frequency band for each of the plurality of satellite signals; and a noise determining unit configured to determine that the noise jamming has occurred when the signal strength is equal to or greater than the reference strength.

In the present invention, the signal processing unit derives the signal strength as a voltage value, and the noise determination unit compares the voltage value derived by the signal processing unit with a preset threshold voltage value so that the voltage value is the threshold voltage If it is greater than or equal to the value, it is characterized in that it is determined that noise jamming has occurred.

In the present invention, the spoofing detection unit may include: a measurement unit for measuring a pseudorange of each of the plurality of satellite channels based on the plurality of satellite signals; a calculation unit configured to calculate an estimated pseudorange of each of the plurality of satellite channels based on coordinate information received from the inertial navigation device; a comparator for comparing the pseudorange and the estimated pseudorange for each of the plurality of satellite channels; and a spoofing determination unit configured to determine that the spoofing jamming has occurred when the difference between the pseudorange and the estimated pseudorange is equal to or greater than a reference value.

In the present invention, the spoofing determining unit determines that the spoofing jamming has occurred in a corresponding channel when a difference between the pseudorange and the estimated pseudorange for at least one of the plurality of satellite channels is greater than or equal to a reference value. do.

In the present invention, the wireless communication unit is characterized in that the notification signal is transmitted to the user device using a synchronous data link control communication method.

The jamming detection system of the present invention has an effect of detecting noise jamming and deceptive jamming using an inertial navigation device.

In addition, the jamming detection system of the present invention has an effect of simultaneously detecting noise jamming and deceptive jamming using a single antenna.

1 is a diagram illustrating a jamming detection system according to an embodiment of the present invention.
2 is a diagram illustrating a jamming detection device according to an embodiment of the present invention.
3 is a diagram illustrating a noise detection unit according to an embodiment of the present invention.
4 is a diagram illustrating a spoof detection unit according to an embodiment of the present invention.
5 is a diagram illustrating the operation of a jamming detection device according to an embodiment of the present invention.

The present invention is described in more detail.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention and other matters necessary for those skilled in the art to easily understand the contents of the present invention will be described in detail. However, since the present invention can be implemented in many different forms within the scope described in the claims, the embodiments described below are merely illustrative regardless of whether they are expressed or not.

Like reference numerals designate like components. Also, in the drawings, the thickness, ratio, and dimensions of components are exaggerated for effective description of technical content. “And/or” may include any combination of one or more that the associated elements may define.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. Singular expressions may include plural expressions unless the context clearly dictates otherwise.

In addition, terms such as "below", "lower side", "above", and "upper side" are used to describe the relationship between components shown in the drawings. The above terms are relative concepts and will be described based on the directions shown in the drawings.

Terms such as "include" or "have" are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but that one or more other features, numbers, or steps are present. However, it should be understood that it does not preclude the possibility of existence or addition of operations, components, parts, or combinations thereof.

That is, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and in the following description, when a part is connected to another part, it is directly connected. In addition, it may also include a case where the other element is electrically connected with another element interposed therebetween. In addition, it should be noted that the same reference numerals and symbols refer to the same components in the drawings, even if they are displayed on different drawings.

1 is a diagram showing a jamming detection system 10 according to an embodiment of the present invention.

Referring to FIG. 1 , the jamming detection system 10 of the present invention can detect jamming occurring in a Global Navigation Satellite System (GNSS).

The jamming detection system 10 of the present invention may include a jamming detection device 100 , an inertial navigation device 200 and a user device 300 .

The jamming detection device 100 may detect noise jamming and deception jamming using the inertial navigation device 200 . In particular, the jamming detecting apparatus 100 may detect spoofing using the same satellite signal while detecting noise jamming based on the satellite signal.

The jamming detecting device 100 may perform satellite communication with satellites of the STL, and multiply the time at which satellite signals from the STL satellites are received by the speed of light to obtain a pseudorange. can measure

Depending on the embodiment, the jamming detecting apparatus 100 may determine the coordinates at which the jamming detecting apparatus 100 is located using pseudoranges measured from at least four artificial satellites.

Here, the artificial satellite group (STL) may include a plurality of artificial satellites used for position measurement of the satellite navigation system.

The inertial navigation device 200 may be located adjacent to the jamming detection device 100 and detect the location of the jamming detection device 100 . For example, the inertial navigation apparatus 200 includes a gyro sensor and an accelerometer, and may measure a current position and speed by measuring and reflecting a moving direction and a moving displacement based on initially input position information.

For example, the inertial navigation apparatus 200 may provide navigation information including position information and speed information sensed in the above-described manner to the jamming detection apparatus 100 .

In this specification, the inertial navigation device 200 may mean a precision inertial navigation device.

The user device 300 may receive a notification signal from the jamming detecting device 100 and notify the user that at least one of noise jamming and deceptive jamming has occurred.

The user device 300 may transmit and receive signals with the jamming detection device 100 through wireless communication. For example, the user device 300 may be implemented as a radio transceiver or a smart device.

According to embodiments, the jamming detection device 100 and the user device 300 may perform wireless communication through a synchronous data link control and derivatives (SDLC) communication scheme. However, the present invention is not limited thereto, and the jamming detection device 100 and the user device 300 may perform communication in various ways.

2 is a diagram illustrating a jamming detection device 100 according to an embodiment of the present invention.

Referring to FIG. 2 , the jamming detection device 100 may include an antenna 110, a noise detector 120, a spoof detector 130, a control unit 140, and a wireless communication unit 150.

The antenna 110 may receive a plurality of satellite signals through a plurality of satellite channels from an artificial satellite group. For example, the antenna 110 is a single antenna and is provided to perform communication with an artificial satellite group, and can receive satellite signals from the artificial satellite group.

The noise detector 120 may detect noise jamming based on a plurality of satellite signals received through the antenna 110 . That is, the noise detector 120 may signal-process signals received by the antenna 110 to determine whether noise jamming has occurred.

For example, the noise detection unit 120 may determine that noise jamming has occurred when an excessive signal strength is detected in a frequency band of a satellite signal among signals received through an antenna.

The deception detection unit 130 may detect deception jamming based on a plurality of satellite signals received through the antenna 110 . That is, the spoof detection unit 130 may determine whether spoof jamming has occurred through pseudorange comparison based on the plurality of satellite signals received by the antenna 110 .

For example, when spoofing jamming occurs, the spoofing detecting unit 130 may determine which satellite channel has spoofing jamming. In particular, the spoofing detection unit 130 may detect spoofing.

The noise detection unit 120 and the deception detection unit 130 of the present invention are characterized in that they detect noise jamming and deception jamming based on satellite signals received through the same single antenna 110, through which the present invention The jamming management apparatus and jamming management system of the above have an effect of reducing manufacturing cost and management cost.

The controller 140 may generate a notification signal when at least one of noise jamming and deception jamming is detected. However, the present invention is not limited thereto, and the control unit 140 may control the overall operation of the jamming detection device 100 as well as generating a notification signal.

For example, the controller 140 may connect a satellite channel in which noise jamming and deceptive jamming has occurred to a new artificial satellite. That is, when noise jamming and deception jamming occur, the controller 140 may terminate the connection to the corresponding satellite and proceed with connection to a new satellite. Depending on the embodiment, the controller 140 may directly replace the satellite connection or indirectly induce replacement of the satellite connection. Within the scope of achieving the object of the present invention, the controller 140 may control the satellite connection in various ways. Through this, the controller 140 can make the user escape from the jamming attack.

The wireless communication unit 150 may transmit a notification signal to the user device. For example, the wireless communication unit 150 may transmit a notification signal to the user device using a synchronous data link control and derivatives (SDLC) communication method.

The present invention is not limited thereto, and the wireless communication unit 150 may transmit the notification signal generated by the control unit 140 to another external device.

3 is a diagram showing the noise detector 120 according to an embodiment of the present invention.

Referring to FIG. 3 , the noise detection unit 120 may include a signal processing unit 121 and a noise determination unit 122 .

The signal processing unit 121 may derive a signal strength according to a frequency band of each of a plurality of satellite signals. That is, the signal processing unit 121 may receive a signal for a frequency band of a plurality of satellite signals and derive a signal strength according to the frequency band.

For example, the signal processing unit 121 may detect signal strength of a frequency band of satellite signals and derive the signal strength as a voltage value.

The noise determination unit 122 may determine that noise jamming has occurred when the signal strength is greater than or equal to the reference strength.

For example, the noise determination unit 122 may compare the voltage value derived by the signal processing unit 121 with a preset threshold voltage value, and determine that noise jamming has occurred when the voltage value is greater than or equal to the threshold voltage value.

Depending on the embodiment, the signal processing unit 121 may include an analog-to-digital converter (ADC). The signal processing unit 121 may include a frequency band in which satellite signals can be received. An input signal may be expressed as a signal strength according to a frequency band.

For example, the satellite signal may be input with a signal strength in the range of -130 to -70 dB, and the noise jamming signal may be input with a signal strength of -60 dB or more. The signal processing unit 121 may convert the signal strength into a preset voltage value and output it to the noise determination unit 122 .

4 is a diagram showing the spoof detection unit 130 according to an embodiment of the present invention.

Referring to FIG. 4 , the deception detection unit 130 may include a measurement unit 131 , a calculation unit 132 , a comparison unit 133 and a deception determination unit 134 .

The measurer 131 may measure pseudoranges of each of the plurality of satellite channels based on the plurality of satellite signals. For example, the measuring unit 131 measures a pseudorange by calculating the distance between the artificial satellite and the receiver for each channel using the delay time of the received satellite signal and the transmission speed of the signal (eg, the speed of light). can do. Pseudorange is a term commonly used in GPS, meaning the distance between a satellite and a GPS receiver existing on Earth.

The calculation unit 132 may calculate an estimated pseudorange of each of a plurality of satellite channels based on the location information received from the inertial navigation device. For example, the calculation unit 132 may receive location information from the inertial navigation device 200 shown in FIG. 1 and obtain location information of a corresponding artificial satellite from satellite signals received through a plurality of satellite channels. The calculation unit 132 may calculate an estimated pseudorange representing the distance between the artificial satellite and the jamming detection device 200 using the location information.

The comparator 133 may compare a pseudorange and an estimated pseudorange for each of a plurality of satellite channels. For example, the comparator 133 may receive the pseudorange and the estimated pseudorange from the measurer 131 and the calculator 132, respectively, and calculate a difference therebetween.

The spoofing determination unit 134 may determine that spoofing jamming has occurred when the difference between the pseudorange and the estimated pseudorange is greater than or equal to a reference value. For example, the spoofing determination unit 134 may determine that spoofing jamming has occurred when the difference between the pseudorange calculated by the comparator 133 and the estimated pseudorange is greater than or equal to a preset reference value.

Specifically, the spoofing determination unit 134 may determine that spoofing jamming has occurred in a corresponding channel when a difference between a pseudorange and an estimated pseudorange for at least one of a plurality of satellite channels is greater than or equal to a reference value.

5 is a diagram illustrating the operation of the jamming detection device 100 according to an embodiment of the present invention.

Referring to FIGS. 4 and 5 , the jamming detection device 100 may communicate with first to fourth artificial satellites ST1 , ST2 , ST3 , and ST4 . At this time, the jamming detection device 100 communicates with the first artificial satellite ST1 through the first satellite channel CH1, and communicates with the second artificial satellite ST2 through the second satellite channel CH2, and It can communicate with the third artificial satellite (ST3) through the third satellite channel (CH3), and communicate with the fourth artificial satellite (ST4) through the fourth satellite channel (CH4).

The jamming detecting apparatus 100 may receive satellite signals through the first to fourth satellite channels CH1 , CH2 , CH3 , and CH4 . For example, the measurement unit 131 of the jamming detection apparatus 100 may measure pseudoranges of the first to fourth satellite channels CH1 , CH2 , CH3 , and CH4 based on the satellite signals.

Also, the jamming detection device 100 may receive location information from the inertial navigation device 200 . For example, the calculation unit 132 of the jamming detecting apparatus 100 may calculate the estimated pseudoranges of the first to fourth satellite channels CH1 , CH2 , CH3 , and CH4 based on location information.

The jamming detecting apparatus 100 compares the pseudorange and the estimated pseudorange for each of the first to fourth satellite channels CH1, CH2, CH3, and CH4 to calculate a difference value, and when the difference value is equal to or greater than a preset reference value. , it can be determined that deceptive jamming has occurred in the corresponding satellite channel.

Through this, the jamming detecting device 100 can connect the satellite channel in which noise jamming or deception jamming has occurred to a new satellite and escape from noise jamming or deceptive jamming.

Through the above method, the jamming detection system of the present invention has an effect of detecting noise jamming and deceptive jamming using an inertial navigation device.

In addition, the jamming detection system of the present invention has an effect of simultaneously detecting noise jamming and deceptive jamming using a single antenna.

The functional operations described in this specification and the embodiments related to the present subject matter are implemented in digital electronic circuits, computer software, firmware, or hardware, or in a combination of one or more of them, including the structures disclosed in this specification and their structural equivalents. It is possible.

Embodiments of the subject matter described herein relate to one or more computer program products, that is, one or more computer program instructions encoded on a tangible program medium for execution by or controlling the operation of a data processing device. It can be implemented as a module. A tangible program medium may be a propagated signal or a computer readable medium. A propagated signal is an artificially generated signal, eg a machine generated electrical, optical or electromagnetic signal, generated to encode information for transmission by a computer to an appropriate receiver device. The computer readable medium may be a machine readable storage device, a machine readable storage substrate, a memory device, a combination of materials that affect a machine readable propagating signal, or a combination of one or more of these.

A computer program (also known as a program, software, software application, script, or code) may be written in any form of programming language, including compiled or interpreted language or a priori or procedural language, and may be a stand-alone program or module; It may be deployed in any form, including components, subroutines, or other units suitable for use in a computer environment.

A computer program does not necessarily correspond to a file on a file device. A program may be contained within a single file provided to the requested program, or within multiple interacting files (e.g., one or more of which stores a module, subprogram, or piece of code), or within a file holding other programs or data. may be stored within a part (eg, one or more scripts stored within a markup language document).

A computer program may be deployed to be executed on a single computer or multiple computers located at one site or distributed across multiple sites and interconnected by a communication network.

Additionally, the logic flow and structural block diagrams described in this patent document describe corresponding actions and/or specific methods supported by corresponding functions and steps supported by the disclosed structural means. It can also be used to build software structures and algorithms and their equivalents.

The processes and logic flows described herein can be performed by one or more programmable processors executing one or more computer programs to perform functions by operating on input data and generating output.

Processors suitable for the execution of computer programs include, for example, both general and special purpose microprocessors and any one or more processors of any type of digital computer. Generally, a processor will receive instructions and data from either read-only memory or random access memory or both.

The core elements of a computer are one or more memory devices for storing instructions and data and a processor for executing instructions. Also, a computer is generally operable to receive data from or transfer data to one or more mass storage devices for storing data, such as magnetic, magneto-optical disks or optical disks, or to perform both such operations. combined with or will include them. However, a computer need not have such a device.

The present description presents the best mode of the invention and provides examples to illustrate the invention and to enable those skilled in the art to make and use the invention. The specification thus prepared does not limit the invention to the specific terms presented.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art or those having ordinary knowledge in the art do not deviate from the spirit and technical scope of the present invention described in the claims to be described later. It will be understood that the present invention can be variously modified and changed within the scope not specified.

Therefore, the technical scope of the present invention is not limited to the contents described in the detailed description of the specification, but should be defined by the claims.

10: jamming detection system
100: jamming detection device
110: antenna
120: noise detector
121: signal processing unit
122: noise determination unit
130: deception detection unit
131: measurement unit
132: calculation unit
133: comparison unit
134: deception judgment unit
140: control unit
150: wireless communication unit
200: inertial navigation system
300: user device

Claims (13)

an antenna for receiving a plurality of satellite signals through a plurality of satellite channels from an artificial satellite group;
a noise detection unit configured to detect noise jamming based on the plurality of satellite signals received through the antenna;
a spoof detection unit for detecting spoof jamming based on the plurality of satellite signals received through the antenna;
a control unit configured to generate a notification signal when at least one of the noise jamming and the deceptive jamming is detected; and
Including a wireless communication unit for transmitting the notification signal to the user device,
The noise detector,
a signal processing unit for deriving a signal strength according to a frequency band of each of the plurality of satellite signals; and
A noise determination unit configured to determine that the noise jamming has occurred when the signal strength is greater than or equal to a reference strength;
The deception detection unit,
a measuring unit configured to measure a pseudorange of each of the plurality of satellite channels based on the plurality of satellite signals;
a calculation unit for calculating an estimated pseudorange of each of the plurality of satellite channels based on coordinate information received from an inertial navigation device;
a comparator for comparing the pseudorange and the estimated pseudorange for each of the plurality of satellite channels; and
and a spoofing determination unit configured to determine that the spoofing jamming has occurred when the difference between the pseudorange and the estimated pseudorange is equal to or greater than a reference value;
Characterized in that, when it is determined that the noise jamming and the deception jamming have occurred, the control unit terminates the connection to the corresponding satellite and proceeds with connection with a new satellite.
Jamming detection device. delete According to claim 1,
The signal processing unit derives the signal strength as a voltage value,
The noise determination unit compares the voltage value derived by the signal processing unit with a preset threshold voltage value, and determines that noise jamming has occurred when the voltage value is greater than or equal to the threshold voltage value.
Jamming detection device. delete According to claim 1,
The fraud determination unit,
When a difference between the pseudorange and the estimated pseudorange for at least one of the plurality of satellite channels is greater than or equal to a reference value, it is determined that the deceptive jamming has occurred in the corresponding channel.
Jamming detection device. According to claim 5,
Characterized in that the wireless communication unit transmits a notification signal to the user device using a synchronous data link control communication method.
Jamming detection device. delete a jamming detection device for detecting noise jamming and deceptive jamming using an inertial navigation device; and
Including an inertial navigation device for detecting the position of the jamming detection device,
The jamming detection device,
an antenna for receiving a plurality of satellite signals through a plurality of satellite channels from an artificial satellite group;
a noise detection unit configured to detect the noise jamming based on the plurality of satellite signals received through the antenna;
a spoof detection unit configured to detect the spoof jamming based on the plurality of satellite signals received through the antenna;
a control unit configured to generate a notification signal when at least one of the noise jamming and the deception jamming is detected; and
Including a wireless communication unit for transmitting the notification signal to the user device,
The noise detector,
a signal processing unit for deriving a signal strength according to a frequency band of each of the plurality of satellite signals; and
A noise determination unit configured to determine that the noise jamming has occurred when the signal strength is greater than or equal to a reference strength;
The deception detection unit,
a measuring unit configured to measure a pseudorange of each of the plurality of satellite channels based on the plurality of satellite signals;
a calculation unit for calculating an estimated pseudorange of each of the plurality of satellite channels based on coordinate information received from an inertial navigation device;
a comparator for comparing the pseudorange and the estimated pseudorange for each of the plurality of satellite channels; and
a spoofing determining unit configured to determine that the spoofing jamming has occurred when the difference between the pseudorange and the estimated pseudorange is equal to or greater than a reference value;
Characterized in that, when it is determined that the noise jamming and the deception jamming have occurred, the control unit terminates the connection to the corresponding satellite and proceeds with the connection with a new satellite.
Jamming detection system. delete According to claim 8,
The signal processing unit derives the signal strength as a voltage value,
The noise determination unit compares the voltage value derived by the signal processing unit with a preset threshold voltage value, and determines that noise jamming has occurred when the voltage value is greater than or equal to the threshold voltage value.
Jamming detection system. delete According to claim 8,
The fraud determination unit,
When a difference between the pseudorange and the estimated pseudorange for at least one of the plurality of satellite channels is greater than or equal to a reference value, it is determined that the deceptive jamming has occurred in the corresponding channel.
Jamming detection system. delete

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