KR20170057966A - Apparatus and method for generating spoofing signal of global navigation satellite system based on radar tracking - Google Patents

Abstract

Provided is a spoofing signal generating apparatus which generates signals to deceive an object having a global navigation satellite receiver. The spoofing signal generating apparatus comprises: a calculating unit which, on the basis of a first characteristic information containing at least one of the size, the location, and the speed of a first object received from a character analyzer for an object to be deceived, calculates one or more second characteristic information among a satellite capable of transmitting to the first object, a distance from the first object, a doppler frequency and a propagation path; a generating unit which generates a synchronization signal, which synchronizes a clock signal received from a GNSS receiver with a GNSS signal, and generates a spoofing signal by combining the synchronization signal with the second characteristic information; and a transmitting unit which transmits the spoofing signal in a direction of the first object.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus and a method for generating a satellite navigation navigation signal based on radar tracking,

The present invention relates to a technique for generating a signal for deceiving a deceased object equipped with a satellite navigation receiver, more specifically, to grasp dynamic characteristics such as the position and speed of a deceased object through radar precision tracking, To generate a precise satellite navigation fake signal.

The Global Navigation Satellite System (GNSS), which includes GPS, is a device that provides relatively simple and accurate location information. It is used in various fields such as smart devices, car navigation, surveying, cartography, geodesy, unmanned aircraft, . Thus, the satellite navigation system is conveniently used for practical purposes in real life, but it can cause much harm if used according to enemy military / tactical purposes. For example, they could be attacked by missiles guided by GNSS navigation for military purposes, or monitored by unmanned aircraft such as drone equipped GNSS receivers for tactical / malicious purposes. Accordingly, it is necessary to spoof a target object equipped with a satellite navigation receiver for military / tactical purposes to reduce or prevent damage from the enemy.

GNSS deception means generating a simulated signal of the GNSS satellite navigation signal and sending it slightly higher than the intensity of the actual GNSS signal to acquire and track the simulated GNSS signal instead of the actual GNSS signal, And to derive position and time information. For example, during the military operations conducted by the United States in Iraq and Afghanistan, some of the guided weapons have fallen to areas other than the target area, resulting in civilian casualties. It will not even be able to detect whether it has been disturbed.

However, in the case of the conventional satellite navigation signal generation technique, only a simple jamming signal is generated instead of a spoofing signal, so that a spoofer is transmitted to the satellite navigation receiver of the target object There is a limit in deriving the intended position and route.

According to one aspect, there is provided an apparatus for generating a satellite navigation signal based on radar tracking. The apparatus includes a satellite capable of transmitting to the first object, a distance to the first object based on first characteristic information including at least one of the size, position, and velocity of the first object received from the defacement object characteristic analyzer, A GNSS receiver for generating a synchronization signal by synchronizing the clock signal received from the GNSS receiver with the GNSS signal and for generating the synchronization signal in accordance with the second characteristic information and the second characteristic information, And a transmitter for transmitting the tamper signal in the direction of the first object.

1 is a diagram showing a jamming signal generating apparatus in a general manner.
FIG. 2 is a conceptual diagram illustrating a generation process of a deception signal according to an embodiment.
3 is a block diagram illustrating an apparatus for generating a deactivated signal according to an embodiment.
4 is a diagram for explaining a detailed procedure for generating a deception signal according to an embodiment.
5 is a flow chart illustrating a method of generating a deception signal according to an embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, the scope of the patent application is not limited or limited by these embodiments. Like reference symbols in the drawings denote like elements.

The terms used in the following description are chosen to be generic and universal in the art to which they are related, but other terms may exist depending on the development and / or change in technology, customs, preferences of the technician, and the like. Accordingly, the terminology used in the following description should not be construed as limiting the technical thought, but should be understood in the exemplary language used to describe the embodiments.

Also, in certain cases, there may be a term chosen arbitrarily by the applicant, in which case the meaning of the detailed description in the corresponding description section. Therefore, the term used in the following description should be understood based on the meaning of the term, not the name of a simple term, and the contents throughout the specification.

1 is a diagram showing a jamming signal generating apparatus in a general manner.

In FIG. 1, the jamming signal generator includes a transmitter 110 and a jamming signal generator 120.

First, the jamming signal generator 120 receives a GPS signal from a GPS satellite via an antenna, mixes a coarse / acquisition (C / A) code corresponding to the GPS satellite that transmitted the GPS signal with any jamming data Thereby generating a jamming signal. Then, the transmitter 110 up-converts and amplifies the jamming signal generated through the jamming signal generator 110 to a high frequency, and transmits the amplified signal through the antenna. At this time, the jamming signal generating device selectively connects the input terminal of the jamming signal generator 120 and the output terminal of the transmitter 110 through the switch, and receives the GPS signal and transmits the jamming signal repeatedly .

In the case of such a jamming signal generator, a jamming signal is generated by using a C / A code used by a GPS satellite, which can be understood as a method of matching the bandwidth of a GPS signal with the bandwidth of a jamming signal, have. However, the jamming signal generating device is merely a technique for generating a jamming signal, and thus there is a limit in that a spoofer can not guide the receiver of the deceased subject to a position and a path intended.

FIG. 2 is a conceptual diagram illustrating a generation process of a deception signal according to an embodiment.

The GNSS satellite navigation system 200 including the GPS transmits a satellite navigation signal, and the defacement object 210 such as a drones, a missile, and the like receives the satellite navigation signal from the GNSS satellite navigation system 200 and performs navigation. When the deceased object 210 is captured by the radar 220, the deceased object dynamics analyzer 230 detects the size, position, and position of the deceased object 210, Speed, and the like, and transmits the collected information to the deception signal generator 250. The deception signal generator 250 calculates the separation distance from the deception signal generator 250 to the corresponding defacement object based on the characteristic information received from the defacement object dynamics analyzer 230. Also, the deception-signal generating device 250 calculates the propagation path loss value of the deception signal based on the distance information and the path information on the position of the dejection object. In addition, the defacement signal generator 250 further calculates the delay time of the dequeue signal using the distance to the deceased object, and calculates the Doppler frequency using the speed information of the deceased object. Then, the deception signal generator 250 generates high-precision clock and time information using the GNSS receiver 240, and calculates the delay time, the Doppler frequency, the Doppler frequency, And generates a deception signal using the propagation path loss value.

Meanwhile, in the radar 220, the generated deception signal is transmitted in the direction of the deaf object 210 using the dynamic characteristics information such as the size, position, and speed of the deaf object 210. Also, the radar 220 may track the defacement object 210 and determine whether the deceased object 210 is deceived by determining whether the decease object 210 is guided to an intended position and path. The deception signal generator 250 repeatedly performs the deception signal generation process repeatedly until it finally reaches the purpose of deception, that is, until it reaches the final position intended to be deceived, and transmits the generated deception signal to the deaf- (210).

3 is a block diagram illustrating an apparatus 300 for generating a deactivated signal according to an embodiment of the present invention.

The defacement signal generator 300 generates a deception signal in order to guide the deceased object equipped with the satellite navigation receiver using the GNSS satellite navigation system to the intended setting position and path, and detects the deception / The damage caused by the object can be prevented. The nudity signal generator 300 may include a calculating unit 310, a generating unit 320, and a transmitting unit 330.

First, the calculating unit 310 calculates a satellite capable of transmitting to the first object based on first characteristic information including at least one of the size, position, and velocity of the first object received from the defacement object characteristic analyzer, The second characteristic information of at least one of the separation distance to the object, the Doppler frequency and the propagation path can be calculated. For example, the calculator 310 may calculate information on satellites transmittable to the first object and information on a satellite from the deceptive signal generator to the first object using the position information of the first object in the first characteristic information. Calculate the separation distance. The calculating unit 310 may generate a satellite PRN (Pseudo Random Noise) code corresponding to the satellites using the information on satellites that can be transmitted to the calculated first object, and may calculate up to the calculated first object The propagation path loss value up to the first object, and the transmission intensity of the deception signal can be calculated using the separation distance of the first object, the delay time of the deception signal for deceiving the first object, Similarly, the calculation unit 310 calculates the Doppler frequency according to the motion of the first object using the velocity information of the first object among the first characteristic information. In the entire specification, the second characteristic information means information calculated using the first characteristic information, which is at least one of the size, position, and speed of the first object received from the defacement object characteristic analyzer, And is used to generate a deception signal to deceive the first object as the target.

The generator 320 may generate a synchronization signal synchronizing the clock signal received from the GNSS receiver with the GNSS signal, and combine the synchronization signal with the second characteristic information to generate a tamper signal. For example, the generator 320 may generate second characteristic information including at least one of a satellite PRN code calculated through the calculator 310, a delay time of the dequeue signal, and a transmission intensity of the dequeue signal, Signal to generate the deception signal.

The transmitting unit 330 transmits the deaf signals generated by the generating unit 320 in the direction of the first object. At this time, the direction of the first object may be calculated using the position and velocity information of the first object.

The deception signal generator 300 not only generates a precise deception signal using dynamic characteristic information such as the position, speed, etc. of the deceased object acquired through radar precision tracking, but also generates a precise deception signal through continuous radar tracking, And then repeatedly generate a deception signal to achieve the intended deception purpose. Thus, the deceptive signal generator 300 spoofs deceptive objects such as guided weapons or unmanned airplanes used by the opponent or the enemy for military, tactical, and malicious purposes, thereby preventing damage from the opponent or enemy army And can be prevented in advance.

4 is a diagram for explaining a detailed procedure for generating a deception signal according to an embodiment.

4, the deception signal generator receives position and speed information 400 of the first object, which is a dejective target object, from the defacement object characteristic analyzer. The deactivated signal generating device calculates (410) satellite information in a range in which a signal can be received from the first object using the received position information of the first object, and then calculates a satellite PRN (Pseudo Random Noise code can be generated (411).

The deception signal generating device calculates the delay time of the deception signal for deceiving the first object after calculating the distance to the first object using the position information of the first object, can do. In addition, the deception signal generator calculates 430 the propagation path loss value to the first object using the positional information of the first object and the calculated distance to the first object, (431) the transmission strength of the base station.

The deception signal generator may calculate the Doppler frequency according to the motion of the first object using the velocity information of the first object (440).

On the other hand, the deception signal generator receives (450) the high-precision clock signal and the related time information from the GNSS receiver, and regenerates (450) it with the clock signal and time information synchronized with the GNSS signal.

The priming signal generator outputs the GNSS signal 411, the delay time 421 of the priming signal, the transmission intensity 431 of the priming signal, and the Doppler frequency 440 according to the motion of the first object, (460) a deception signal for deceiving the first object by applying it to a clock signal and time information synchronized with the clock signal. The generated deception signal 460 is transmitted in the direction of the first object calculated through the position and velocity information 400 of the first object and the deception signal generator transmits the deception signal 460 to the first object It is possible to generate a deception signal repeatedly until the intended deception purpose is confirmed by confirming whether or not the deception is achieved.

5 is a flow chart illustrating a method of generating a deception signal according to an embodiment.

The deceptive signal generator 300 is a technology for generating a deceptive signal to derive a deceptive object equipped with a satellite navigation receiver using a GNSS satellite navigation system to an intended setting position and path, And spoofing deceptive objects, such as guided weapons or unmanned aircraft, used for malicious purposes, to prevent and prevent damage from the enemy or enemy forces.

In step 510, based on the first characteristic information including at least one of the size, position, and velocity of the first object received from the defacement object characteristic analyzer by the calculation unit 310 of the deception signal generator, And a second characteristic information of at least one of a satellite capable of being transmitted to the first object, a distance to the first object, a Doppler frequency, and a propagation path. In step 510, the calculating unit 310 calculates information on satellites transmittable to the first object and information on a satellite that can be transmitted from the deceptive signal generator to the first object using the position information of the first object in the first characteristic information Is calculated. The calculating unit 310 may generate a satellite PRN (Pseudo Random Noise) code corresponding to the satellites using the information on satellites that can be transmitted to the calculated first object, and may calculate up to the calculated first object The propagation path loss value up to the first object, and the transmission intensity of the deception signal can be calculated using the separation distance of the first object, the delay time of the deception signal for deceiving the first object, Similarly, the calculation unit 310 calculates the Doppler frequency according to the motion of the first object using the velocity information of the first object among the first characteristic information. Here, the second characteristic information may be understood as information calculated using the first characteristic information, which is at least one of the size, position, and velocity of the first object received from the defacement object characteristic analyzer, Lt; RTI ID = 0.0 > a < / RTI >

In step 520, the generator 320 of the deception signal generator generates a synchronization signal in synchronization with the GNSS signal from the clock signal received from the GNSS receiver, and combines the synchronization signal with the second characteristic information to generate a deception signal can do. In step 520, the generator 320 generates a second characteristic including at least one of a satellite PRN code calculated through the calculation unit 310, a delay time of the dequeue signal, By applying the information to the synchronization signal, the deception signal can be generated.

In step 530, the transmitting unit 330 may transmit the deception signal generated in the generating unit 320 in the direction of the first object. At this time, the direction of the first object may be calculated using the position and velocity information of the first object.

The deception signal generator 300 not only generates a precise deception signal using dynamic characteristic information such as the position, speed, etc. of the deceased object acquired through radar precision tracking, but also generates a precise deception signal through continuous radar tracking, It is possible to generate the deception signal repeatedly by confirming whether or not the deception object has been achieved and to guide the deception object to the intended setting position and route in advance, thereby achieving the intended deception purpose.

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the apparatus and components described in the embodiments may be implemented within a computer system, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable array (FPA) A programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing unit may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded. The software and / or data may be in the form of any type of machine, component, physical device, virtual equipment, computer storage media, or device , Or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed over a networked computer system and stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

Although the embodiments have been described with reference to the drawings, various technical modifications and variations may be applied to those skilled in the art. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Claims (1)

The distance to the first object, the distance to the first object, the Doppler frequency, and the second characteristic information based on first characteristic information including at least one of the size, position, and speed of the first object received from the defacement object characteristic analyzer. And a propagation path;
A generator configured to generate a synchronization signal in synchronization with the GNSS signal and a synchronization signal received from the GNSS receiver, and combine the synchronization signal with the second characteristic information to generate a tamper signal; And
A transmitter for transmitting the deception signal in the direction of the first object;
And an output terminal for outputting the output signal.

Images