KR101399116B1 - Apparatus for generating range gate pull-off jamming signal - Google Patents

Abstract

A random range gate stealing jamming signal producing device is disclosed. The range gate stealing jamming signal producing device according to an embodiment of the present invention comprises; a first pulse train producing unit which produces a first pulse train corresponding to a radar reflection signal based on one or more predetermined first parameters; a second pulse train producing unit which produces a second pulse train having a same shape with that of the first pulse train at the front and the back of the first pulse train based on one or more predetermined second parameters; a jamming signal producing unit which produces a jamming signal for jamming the radar reflection signal using the produced first and second pulse trains; and a blanking control unit which outputs a blanking control signal to control the on/off of the first pulse train and a plurality of second pulse trains based on a predetermined blanking control mode to the jamming signal producing unit. The jamming signal producing unit turns off at least one among the first pulse train and the second pulse trains based on the blanking control signal.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a jamming-

The present invention relates to generation of a distance-only jamming signal, and more particularly, to a method and apparatus for generating a distance-only jamming signal by providing a maximum jamming control variable to an operator, Lt; / RTI >

The RGP sequence and RFT technique, which is one of the existing distance-only techniques, is a technique that allows a radar to follow a false target signal instead of a reflected signal from a target by using a false target signal. Is a technique for generating a target pulse.

In the case of the RFT technique, a plurality of pulse signals including a radar return signal are simulated to make a plurality of targets appear. In the case of the RGP series, a technique of making a target appear to move left and right based on a radar return signal.

FIG. 1 illustrates an example of a conventional RGP sequence and an RFT technique. Referring to FIG.

As shown in FIG. 1, the RGP sequence 110 generates a jamming pulse (jamming signal) that is temporally fast or slow based on a radar reflection signal, thereby making it appear closer or farther away from the position of the actual target. The jamming signal generator receives the velocity / acceleration value, generates a table in which a delay value (degree of movement) of the pulse is to be updated, and compares it with a timer value, The pulse is controlled to move (130).

The RFT technique 120 generates a plurality of stop pulses which are temporally fast and slow based on the radar return signal, thereby deceiving the target as if there are several targets around the actual target.

However, the RGP sequence and the RFT scheme have a very limited jamming parameter that can be controlled by the operator, and since the number of jamming pulses and the degree of movement are the most control parameters, the movement form of the jamming pulse sequence becomes very simple, Jamming signals that are repetitive in simple form can be easily removed from the radar and there is a problem that the effect of the distance gate deception of the radar is reduced.

Therefore, there is a need for a technique that allows the user to control the jamming pulse output at random.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a jamming control apparatus and a jamming control method capable of generating a jamming signal having a random distance only, The present invention has been made in view of the above problems.

It is another object of the present invention to provide a random distance-only jamming signal generating apparatus capable of improving a jamming effect by generating a jamming pulse string having a random shape which is difficult to measure a pattern.

Another object of the present invention is to provide a random distance-only jamming signal generating device capable of deceiving a radar tracking gate more robustly than a jamming effect of a conventional distance deception technique.

However, the objects of the present invention are not limited to those mentioned above, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a distance-only jamming signal generating apparatus including a first pulse train generating a first pulse train corresponding to a radar return signal based on at least one first parameter set in advance, Generating unit; A second pulse train generator for generating a second pulse train of the same type as the first pulse train before and after the first pulse train based on at least one second parameter set in advance; And a jamming signal generator for generating a jamming signal for jamming the radar return signal using the generated first pulse string and the second pulse string.

Furthermore, the apparatus according to the present invention further includes a blanking control section for outputting, to the jamming signal generating section, a blanking control signal for controlling ON / OFF of the first pulse train and the plurality of second pulse strings based on a preset blanking control mode And the jamming signal generator may turn off at least one of the first pulse string and the plurality of second pulse strings based on the blanking control signal.

Wherein the blanking control mode includes a first mode for turning off a predetermined one of the first pulse train and the plurality of second pulse train, a second mode for sequentially turning on / off the first pulse train and the plurality of second pulse train, A third mode for varying a cycle in which the first pulse string and the plurality of second pulse strings are repeated based on a predetermined duty and frequency and for turning off or on / off at least one of the first pulse string and the plurality of second pulse strings; . ≪ / RTI >

Wherein the first pulse train is a first pulse generated at the same position as the radar return signal; A second pulse generated at a position spaced apart from the first pulse by a first interval; And a third pulse generated at a position spaced apart from the first pulse by a second interval (second interval> first interval).

The first pulse may be blanked if the second pulse is generated within a predetermined interval based on the position of the laser reflected signal.

The jamming signal generator may generate a plurality of second pulse strings before and after the first pulse string based on a position of a fourth pulse corresponding to the first pulse included in each of the second pulse strings.

Wherein the second pulse train generator generates the second pulse train by generating a fourth pulse corresponding to the first pulse included in the second pulse train located farthest from the plurality of second pulse train based on the radar reflection signal It is possible to generate the plurality of second pulse sequences so as to be located within a maximum of 25 [us].

Further, the apparatus according to the present invention may further comprise a time counter for generating the first pulse train and the second pulse train based on the first parameter and the second parameter, the first pulse train generating unit and the second pulse train generating unit And a time counter unit for providing the time counter.

According to the present invention, it is possible to generate a jamming signal of a variety of complex and unpredictable types by providing a maximum jamming control parameter to the operator, and it is possible to generate a radar tracking gate You can deceive.

In addition, according to the present invention, it is possible to easily grasp jamming only by a simple repetitive-type simple distance meter, and to radiate a jamming pulse train of a random shape that is difficult to measure a pattern to a radar that matches a tracking gate to an original target Thus, the jamming effect can be improved.

FIG. 1 illustrates an example of a conventional RGP sequence and an RFT technique. Referring to FIG.
FIG. 2 shows a configuration of a distance-only jamming signal generating apparatus according to an embodiment of the present invention.
3 shows an exemplary diagram for explaining a configuration of an embodiment of the first pulse train.
FIG. 4 shows an exemplary diagram for explaining a form of an embodiment of the second pulse train.
Fig. 5 shows an example for explaining the blanking of the pulse string.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the accompanying drawings. Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. However, the present invention is not limited to or limited by the embodiments. Like reference symbols in the drawings denote like elements.

Hereinafter, a random distance-only jamming signal generating apparatus according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 to 5.

FIG. 2 shows a configuration of a distance-only jamming signal generating apparatus according to an embodiment of the present invention.

2, the apparatus according to the present invention includes a time counter 210, a first pulse string generator 220, a second pulse string generator 230, a blanking signal controller 240, and a jamming signal generator 250).

The time counter 210 may be configured to generate a first pulse train based on at least one or more first parameters assigned or set by the first pulse train assigning unit 231 and at least one or more second parameters assigned or set by the burst assigning unit 231 The first pulse train controller 223 and the burst controller 233 provide a time counter for generating the first pulse train and the second pulse train.

At this time, the time counter 210 counts time from the instant of receiving the jamming start and blanking start command with reference to the values generated by the individual pulse generator 222 and the burst generator 232, The pulse time control unit 223, the burst control unit 233 and the blanking control unit 242 to enable the time delay value and the burst start time and the blanking on / off time .

The first pulse train generating unit 220 includes a first pulse train assigning unit 221, an individual pulse generating unit 222, and a first pulse train controlling unit 223. In the present invention, the first pulse train is defined as a main pulse train, and the second pulse train is defined as a burst pulse train.

The first pulse sequence allocator sets various editable parameters (first parameters) for generating main pulses.

At this time, the first parameter is as follows.

Jamming pulse width (PW)

The pulse repetition interval (PRI) of the radar pulse signal

Pulse travel curve types: L-curve, J-curve, S-curve,

Capture time: the time at which the jamming pulse is held at the radar pulse position

Maximum delay hold time: The time at which the jamming pulse is maintained at the maximum delay distance

Cover Pulse Jamming Pulse Width

Cover Pulse PW application mode: Apply the same PW as the jamming pulse width or apply the specified pulse width

First / Second Target Direction: Direction of walk pulse based on Cover Pulse

Direction mode: cyclic (repeat after arrival of maximum delay delay), probability (randomly set direction)

Second Target Delay: Starting position of walk pulse # 2

Second Target Delay Mode: Whether or not the second target delay is applied

Second Target Start Time: Start point of Second Target creation

Hook Position, Hook Direction: Hook Target position and Cover Pulse direction

Maximum Delay Delay: Delay value of Pulse moving farthest among Walk Pulse # 1, # 2

The cover pulse, walk pulse, and hook pulse included in the above parameters will be described with reference to FIG.

The individual pulse generator 222 generates a time delay value and a time delay value for generating the target reflected signals (walk pulse # 1, # 2) of the radar pulse signal based on the parameters received from the first pulse sequence assigning unit 221 And generates a time delay value application table.

Also, the individual pulse generating section 222 outputs the values for the moving direction / shape and the position to the register (s) in five individual pulses (cover pulse, walk pulse # 1, walk pulse # 2, To be referred to when controlling the jamming.

The first pulse train control unit 223 generates the first pulse train based on the values or signals received from the individual pulse generating unit 222 and the time counter 210 and outputs the generated first pulse train to the jamming signal generating unit 250 .

At this time, the first pulse train control unit 223 generates pulses corresponding to the delay values of the individual pulses received from the individual pulse generating unit 222 according to the individual pulse control timing sent from the time counter, And output the pulse string to the jamming signal generator 250.

For example, as shown in FIG. 3, the first pulse train generated by the first pulse train control unit 233 includes a first pulse (cover pulse) generated at the same position as the radar pulse, A second pulse (walk pulse # 1, # 2) generated at a position spaced apart from the first pulse by a first interval and a third pulse generated at a position separated by a second interval (second interval> first interval) hook pulse # 1, # 2).

At this time, the walk pulse can be formed before and after the cover pulse, and the formation positions of the walk pulse # 1 and the walk pulse # 2 can be individually controlled.

At this time, the hook pulses # 1 and # 2 can be fixed to a predetermined position based on the radar return signal.

Of course, the position, direction, pulse width, and the like for the cover pulse, the walk pulse, and the hook pulse may be determined based on the parameter set in the first pulse sequence assigning unit 221. [

Furthermore, the cover pulse may be blanked if the walk pulse is generated within a predetermined interval based on the position of the laser reflected signal.

2, the second pulse train generator 230 includes a burst allocator 231, a burst generator 232, and a burst controller 233.

The burst allocation unit 231 sets an edit parameter (second parameter) for generation of a burst, that is, a second pulse string. At this time, the second parameter is as follows.

BurstStartTime: Start time of burst generation from when the burst start command was received

BurstDirection: Direction of individual bursts relative to the main pulse train

BurstPosition: location of individual bursts relative to the main pulse train

The burst generating unit 232 stores a value for a timing calculation and a burst direction / position for outputting a burst at a burst start point in a register based on the parameter input from the burst allocation unit 231, do.

The burst control unit 233 generates a second pulse train based on the value or signal received from the burst generating unit 232 and the time counter 210 and outputs the generated second pulse train to the jamming signal generating unit 250 do.

At this time, the burst control unit 233 generates burst pulses for the position value of the individual burst received from the burst generating unit 232 in accordance with the burst control timing sent from the time counter, and generates the generated burst pulses, that is, 2 pulse train to the jamming signal generator 250. [

FIG. 4 shows an example of the second pulse train generated by the second pulse train generator 230, and shows a burst pulse train composed of a first pulse train (main pulse train).

As shown in FIG. 4, the second pulse train can generate a total of five bursts before and after the radar return signal, and each position is a pulse (center pulse) corresponding to the cover pulse of the first pulse train included in each burst, Position.

At this time, the second pulse train generator 230 generates the second pulse train so that the center pulse of the second pulse train located farthest from the plurality of second pulse train (burst pulse train) is located within a maximum of 25 [ A pulse train can be generated. In other words, the burst can be set up to 25 [us] faster or slower based on the radar reflection signal.

The blanking signal control unit 240 includes a blanking assignment unit 241 and a blanking control unit 242.

The blanking assignment unit 241 sets parameters for blanking control. At this time, the setting parameters are as follows.

Blanking Mode: Individual, Cross, Duty Control

Individual mode: Each Burst is individually Blanking (On / Off)

Cross mode: Blanking (On / Off) all the bursts cross in sequence,

Duty control mode: Blanking (On / Off) with specific PRI and specific duty value for the whole burst column.

Blanking sequence: In case of cross mode, order of each burst

Individual Blanking: Whether individual blanking is applied to each burst in the individual mode

Blanking On / Off Time: Specify Blanking On / Off Time for each Burst

Duty control mode: In Duty control mode, sawtooth wave, triangle wave, Random

Upper / lower limit Duty value (fixed frequency): When the duty is changed, it changes from the lower limit duty value to the upper limit duty value with the fixed frequency.

Duty / frequency change cycle: Cycle time to update duty and frequency value

Upper / lower limit frequency value (Fixed duty): When the frequency changes, change from lower frequency value to upper frequency value with fixed duty

CP Inhibit interval: If a walk pulse exists in this interval, delete the cover pulse (blanking)

Second walk pulse delay (WPD): Occurs when a walk pulse occurs at a specific location,

The blanking control unit 242 controls on / off the first pulse train and the plurality of second pulse train according to the blanking control mode received from the blanking allocation unit 241. The blanking control unit 242 controls the ON / Generates a blanking control signal (Blanking On / Off Masking) by comparing the counted time counter value, and outputs the generated blanking control signal to the jamming signal generating unit 250.

In this case, the blanking control mode includes a first mode (individual mode) for turning off a predetermined one of the first pulse string and the plurality of second pulse strings, a second mode for sequentially turning on / off the first pulse string and the plurality of second pulse strings (Intersecting mode) of the first pulse train and a plurality of second pulse train based on the predetermined duty and frequency, and for changing the period in which the first pulse train and the plurality of second pulse train are repeated and turning on / off at least one of the first pulse train and the plurality of second pulse train 3 mode (duty control mode).

The blanking signal controller 240 will be described in more detail with reference to FIG.

FIG. 5 is a diagram illustrating an example of blanking of a pulse string. The concept of masking (or blanking) a part of a maximum of 25 generated pulse strings is shown in FIG.

The blanking mode in the present invention is a total of three modes of individual mode, crossover mode and duty control mode, and each mode is a mode in which each burst is individually erased with On / Off Time, In the duty control mode, pulse sequence is masked while periodically changing the duty ratio with a specific PRI (Pulse Repetition Interval).

As shown in FIG. 5, in the CP Inhibit period, when a walk pulse is generated or existing within a predetermined interval based on the position of the radar return signal, a cover pulse is deleted or blanked. When there is a walk pulse in this interval The reason for blanking the cover pulse is that the walk pulse moves to the beginning of the cover pulse position. When the radar tracking gate tracks the walk pulse, there is no signal on the cover pulse.

The reason for regenerating Cover Pulse after the CP Inhibit section is to not know which walk pulse is holding the radar tracking gate in the jammer position, and therefore it is necessary to repeat this process repeatedly.

The jamming signal generator 250 includes a first pulse train generated by the first pulse train generator 220, a plurality of second pulse trains generated by the second pulse train generator 230, and a second pulse train generated by the blanking signal controller 240 And generates a jamming signal for jamming the radar reflection signal based on the output blanking control signal.

More specifically, the jamming signal generator 250 generates a jamming signal by using the first pulse string generated by the first pulse string generator 220 and the second pulse string generated by the second pulse string generator 230 as an OR gate (251) to generate up to 25 pulse outputs.

The jamming signal generating unit 250 generates a jamming signal by using the AND gate 252 as the jamming pulse train and the output of the OR gate 251, (random) pulse train.

That is, the jamming signal generator 250 generates a burst having the same shape as the main pulse train on the left and right of the radar reflection signal, that is, the second pulse train up to five (including the main pulse train) based on the main pulse train, Masking or blanking and emitting some of up to 25 pulse sequences at start-up.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or essential characteristics thereof. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

Claims (8)

A first pulse train generator for generating a first pulse train corresponding to a radar reflection signal based on at least one or more first parameters set in advance;
A second pulse sequence generator for generating a plurality of second pulse sequences having the same form as the first pulse sequence before and after the first pulse sequence based on at least one second parameter set in advance; And
A jamming signal generator for generating a jamming signal for controlling the on / off of the generated first pulse string and the plurality of second pulse strings and for jamming the radar reflection signal as a result of the control;
Wherein the jamming signal generator generates a jamming signal. The method according to claim 1,
A blanking control unit for outputting, to the jamming signal generator, a blanking control signal for controlling ON / OFF of the first pulse train and the plurality of second pulse strings based on a preset blanking control mode;
Further comprising:
Wherein the jamming signal generator comprises:
And turns off at least one of the first pulse string and the plurality of second pulse strings based on the blanking control signal. 3. The method of claim 2,
The blanking control mode includes:
A first mode for turning off a predetermined one of the first pulse string and the plurality of second pulse strings; a second mode for sequentially turning on / off the first pulse string and the plurality of second pulse strings; And a third mode in which the first pulse train and the plurality of second pulse train are repeated and a third mode in which at least one of the first pulse train and the plurality of second pulse train is turned off or off / To generate a jamming signal. The method according to claim 1,
Wherein the first pulse train comprises:
A first pulse generated at the same position as the radar return signal;
A second pulse generated at a position spaced apart from the first pulse by a first interval; And
A third pulse generated at a position spaced apart from the first pulse by a second gap (second gap> first gap);
And a jamming signal generator for generating a jamming signal. 5. The method of claim 4,
Wherein the first pulse comprises:
Wherein the second pulse is blanked when the second pulse is generated within a predetermined interval based on the position of the radar return signal. 5. The method of claim 4,
Wherein the jamming signal generator comprises:
Wherein the plurality of second pulse sequences are generated before and after the first pulse sequence based on a position of a fourth pulse corresponding to the first pulse included in each of the second pulse sequences. 5. The method of claim 4,
Wherein the second pulse train generator comprises:
When a plurality of the second pulse strings are generated, a fourth pulse corresponding to the first pulse included in the second pulse string located farthest from the plurality of second pulse strings is within 25 [us] And the second pulse train is generated so that the second pulse train is positioned so that the second pulse train is positioned. The method according to claim 1,
A time counter for providing a time counter for generating the first pulse train and the second pulse train to the first pulse train generator and the second pulse train generator based on the first parameter and the second parameter;
Further comprising a jamming signal generator for generating a jamming signal.

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