KR101112686B1 - Apparatus for generating radar simulsation signal using fast wideband pulse compression and method therof - Google Patents

Abstract

PURPOSE: An apparatus for generating pulse compression radar simulator signals of high speed broadband and a method for generating radar simulator signals using the same are provided to enable efficient performance certification of electronic warfare equipment. CONSTITUTION: A radar simulator signal generating apparatus(10) comprises a digital control circuit(100), a digital tuning signal generator(200), and a pulse generating switch(500). The digital tuning signal generator produces basic signals corresponding to the received frequency information and time-shares the first simulator signal in which the frequency of the basic signal is converted according to frequency control signals. A pulse generating switch receives a first simulator signal and determines the pulse characteristic of the first simulator signal. The pulse generating switch outputs the radar simulator signals. The digital control circuit generates frequency information corresponding to the inputted data and frequency control signals for controlling the frequency modulation of the basic signals, thereby outputting the frequency control signals to a digital tuning signal generator. The digital control circuit generates the pulse control signal for determining the pulse characteristic of the first simulator signal and outputs the pulse control signal to the pulse generating switch.

Description

High speed wideband pulse compression radar simulation signal generator and radar simulation signal generation method using the same {APPARATUS FOR GENERATING RADAR SIMULSATION SIGNAL USING FAST WIDEBAND PULSE COMPRESSION AND METHOD THEROF}

An embodiment according to the concept of the present invention relates to a radar simulation signal generating apparatus, and more particularly to a radar simulation signal generating apparatus for generating a plurality of pulse compression radar signals at high speed over a broadband.

Since the beginning of the Electronic Warfare (EW) against radar, with the advances in radar, Electronic Support Measures (ESM) for receiving and analyzing and Electronic Counter Measures (ECM) for jamming Electronic warfare technology has been developed, and test equipment that simulates radar signals is needed for the development and testing of such electronic warfare equipment. Modern radars use pulse compression to improve the radar detection range and resolution by modulating the frequency inside the pulse (Frequency Modulation On Pulse, FMOP) or phase modulating (Phase Modulation On Pulse, PMOP). Therefore, electronic warfare equipment should be able to collect and analyze these latest radar signals, and for this purpose, equipment that simulates the pulse compression radar signal is needed. Conventional pulse compression radar signal simulation apparatus uses an arbitrary waveform generator (AWG) to perform pulse compression in the baseband, and using the RF upconverter (RF Upconverter) for the radar only of the frequency band It was a way to generate a signal. In terms of electronic warfare equipment, in particular, radar signal acquisition and analysis equipment, a large number of radar signals of an unspecified band must be received over a wide band, and the conventional pulse compression radar simulation signal generator is limited to a specific frequency band to generate a radar signal. To verify the performance of the equipment, a large number of test equipment had to be provided. Therefore, in order to build such a verification method, a large number of expensive test equipment is required, and thus there is a problem in that a high cost verification system needs to be constructed.

The technical problem to be achieved by the present invention is to provide a radar simulation signal generator for generating a broadband pulse compression radar signal at high speed.

In addition, another technical problem to be achieved by the present invention is to provide a radar simulation signal generating method for generating a broadband pulse compression radar signal at high speed.

An apparatus for generating a high-speed broadband pulsed compression radar simulation signal according to an embodiment of the present invention generates a basic signal corresponding to the received frequency information, and modulates the first simulation signal in which the frequency of the basic signal is modulated in response to a frequency control signal. Receives a digital tuned signal generator and the first simulation signal to output, and in response to the pulse control signal to determine the pulse characteristics of the received first simulation signal and outputs as a radar simulation signal and corresponding to the input data Generating a frequency control signal for controlling frequency modulation of the frequency information and the basic signal, outputting the frequency control signal to the digital tuning signal generator, and generating a pulse control signal for determining a pulse characteristic of the first simulated signal; It includes a digital control circuit output to the generation switch.

The radar simulation signal generator further includes a phase modulation circuit for modulating a phase of the first simulation signal output from the digital tuning signal generator to the pulse generation switch in response to a phase control signal, wherein the digital control circuit Generates a phase control signal for controlling phase modulation of the first simulated signal and outputs the phase control signal to the phase modulation circuit.

The radar simulation signal generator further includes a digital step attenuator for modulating the amplitude of the first simulation signal output from the digital tuning signal generator in response to an amplitude control signal and outputting the amplitude to the pulse generation switch. Generates an amplitude control signal for controlling amplitude modulation of the first simulated signal and outputs the amplitude control signal to the digital step attenuator.

The digital tuning signal generator time-divisionally outputs the generated first simulated signal.

In accordance with another aspect of the present invention, there is provided a method of generating a pulse compression radar simulation signal of a high speed broadband, by generating and outputting frequency information corresponding to input data by a digital control circuit, and by a digital tuning signal generator based on the output frequency information. Generating a basic signal, generating a first simulated signal modulated with a frequency of the generated basic signal, time-dividing and outputting the generated first simulated signal by the digital tuning signal generator, and performing a phase modulation circuit on the Modulating the phase of the first simulated signal output by time division and outputting it as a second simulated signal; and determining, by the pulse generating switch, a pulse characteristic of the outputted second simulated signal and outputting the radar simulated signal.

The radar simulation signal generating method of the radar simulation signal generating apparatus further includes modulating an amplitude of the output second simulation signal and outputting the modulated amplitude to the pulse generating switch.

The high-speed broadband pulsed compression radar simulation signal generating apparatus and the simulation signal generating method according to an embodiment of the present invention can generate a wideband pulsed compression radar signal at high speed, so that the performance verification of the electronic warfare equipment for collecting and analyzing radar signals is cheaper. It can be done efficiently.

The detailed description of each drawing is provided in order to provide a thorough understanding of the drawings referred to in the detailed description of the invention.
1 is a block diagram of a high-speed broadband pulse compression radar simulation signal generator according to an embodiment of the present invention.
FIG. 2 shows an internal block diagram of the digital control circuit shown in FIG.
FIG. 3 shows an internal block diagram of the phase modulation circuit shown in FIG.
4 is a flowchart illustrating a method of generating a high speed broadband pulse compression radar simulation signal according to an exemplary embodiment of the present invention.

Specific structural or functional descriptions of the embodiments according to the inventive concept disclosed herein are provided for the purpose of describing the embodiments according to the inventive concept only. It may be embodied in various forms and is not limited to the embodiments described herein.

Embodiments according to the inventive concept may be variously modified and have various forms, so embodiments are illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments in accordance with the concept of the invention to the specific forms disclosed, it includes all changes, equivalents, or substitutes included in the spirit and scope of the present invention.

The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are intended to distinguish one element from another, for example, without departing from the scope of the invention in accordance with the concepts of the present invention, the first element may be termed the second element, The second component may also be referred to as a first component.

When a component is said to be "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that another component may exist in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between. Other expressions describing the relationship between components, such as "between" and "immediately between," or "neighboring to," and "directly neighboring to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. As used herein, the terms "comprise" or "having" are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof that is described, and that one or more other features or numbers are present. It should be understood that it does not exclude in advance the possibility of the presence or addition of steps, actions, components, parts or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined herein. Do not.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a radar simulation signal generating apparatus using high-speed broadband pulse compression according to an embodiment of the present invention, Figure 2 is an internal block diagram of the digital control circuit shown in FIG.

1 and 2, the radar simulation signal generator 10 using high speed broadband pulse compression includes a computer 50, a digital control circuit 100, a digital tuned oscillator 200, and phase modulation. A circuit 300, a digital attenuator 400, and a pulse generating switch 500.

The computer 50 generates various data D1 to D3 programmatically and outputs it to the digital control circuit 100.

The digital control circuit 100 includes a frequency generating circuit 110, an amplitude generating circuit 120, a pulse generating circuit 130, a synchronous control circuit 150, a frequency modulation control circuit 170, and a phase modulation control circuit 180. It includes.

The digital control circuit 100 responds to each of the data D1 to D3 input from the computer 50, characteristic parameter information of the pulse radar signal, for example, frequency information F1 to F3, amplitude information A1 to A3. And generate pulse information P1 to P3 and output frequency information F1 to F3 from the characteristic parameter information of the pulse radar signal to the digital tuning signal generator 200.

In FIG. 1, for convenience of description, three data D1 to D3 are input from the computer 50 to the digital control circuit 100, but the concept of the present invention is the data D1 to D3 input from the computer 50. It is not limited to the number of), it can be implemented as a variety of data is input according to the embodiment.

When the digital control circuit 100 further describes how to generate the characteristic parameter information of the pulse radar signal, the frequency generating circuit 110 in the digital control circuit 100 is input data from the computer 50 ( Each of the frequency information F1 to F3 is generated in response to each of D1 to D3, and the amplitude generating circuit 120 generates each of the amplitude information A1 to A3 in response to each of the input data D1 to D3. Create

In addition, the pulse generating circuit 130 may be configured to respond to each of the input data D1 to D3, and information on pulse information P1 to P3, for example, pulse width PW, and pulse repetition interval. Interval, PRI).

Frequency information (F1 to F3), amplitude information (A1 to A3), and pulse information (P1 to P3) generated and output from the frequency generating circuit 110, the amplitude generating circuit 120, and the pulse generating circuit 130, respectively. Is input to the synchronous control circuit 150.

The synchronous control circuit 150 outputs each of the frequency information F1 to F3 of each of the input data D1 to D3 to the digital tuning signal generator 200.

The digital tuning signal generator 200 outputs frequency patterns corresponding to each of the input frequency information F1 to F3, respectively.

According to an exemplary embodiment, the digital tuning signal generator 200 may output the frequency patterns in time periods so as not to overlap each other by applying a time division method.

That is, the digital tuning signal generator 200 may be generated by applying a time division method to the fundamental frequency patterns corresponding to each of the frequency information F1 to F3.

On the other hand, the digital tuned signal generator 200 has a frequency component modulated with each of the basic frequency patterns in response to the frequency control signal CS1 input from the frequency modulation control circuit 170 in the digital control circuit 100. It can output as one simulation signal RS1.

Although not shown in FIG. 2, the frequency modulation control circuit 170 may include a digital analog converter (DAC) and may generate a frequency control signal CS1 using the digital analog converter.

Accordingly, an analog level input, which is a frequency control signal CS1 output from the digital-to-analog converter DAC, is supplied to the digital tuning signal generation circuit 200, and the digital tuning signal generator 200 supplies the supplied frequency control signal ( In response to CS1), each of the basic frequency patterns may be output as a first simulation signal RS1 having a modulated frequency component.

That is, the digital tuning signal generator 200 frequency modulates each basic frequency pattern generated corresponding to each of the frequency information F1 to F3, time-divisions each of the modulated frequency patterns, and outputs the first simulated signal RS1. can do.

The output first simulated signal RS1 is input to a phase modulation circuit 300, and the phase modulation circuit 300 is a phase control signal CS2 input from a phase modulation control circuit 180 in the digital control circuit 100. ), The first simulation signal RS1 may be output as the second simulation signal RS2 having a modulated phase component.

According to an embodiment, the phase modulation control circuit 300 may generate the phase control signal CS2 using a Barker code.

FIG. 3 shows an internal block diagram of the phase modulation circuit shown in FIG.

Referring to FIG. 3, the phase modulation circuit 300 includes a plurality of hybrid power combiners 310, 330, and 350 and a switch circuit 370.

In FIG. 3, the phase modulation circuit 300 is illustrated as being composed of three hybrid power combiners 310, 330, and 350, but the concept of the present invention is the hybrid power combiners 310 included in the phase modulation circuit 300. It is not limited to the number of, 330, and 350, and the hybrid power couplers 310, 330, and 350 may be variously implemented according to a design specification.

In some embodiments, the switch circuit 370 may be implemented as a 4-port pin diode switch.

A method of modulating the phase of the first simulation signal RS1 by the phase modulation circuit 300 will be described with reference to FIGS. 1 to 3.

The phase modulation circuit 300 turns on any one of the ports A, B, C, and D of the switch circuit 370 according to the phase control signal CS2 input from the phase modulation control circuit 180. )

Accordingly, the phase modulation circuit 300 may select a path through which the first simulated signal RS1 passes through the plurality of hybrid power combiners 310, 330, and 350 to selectively select a phase of the first simulated signal RS1. Can be modulated

In this case, the first hybrid power combiner 310 is a hybrid power combiner capable of outputting a phase difference of 180 degrees, and the second hybrid power combiner 330 is a hybrid power combiner capable of outputting a phase difference of 90 degrees, and the third hybrid. The power combiner 330 is a hybrid power combiner capable of outputting a phase difference of 90 degrees.

For example, when the switch circuit 370 turns on the first port A by the phase control signal CS2 input from the phase modulation control circuit 300, the first simulation signal RS1 is the first hybrid. While passing through the power combiner 310 and the second hybrid power combiner 330, it is output as the second simulated signal RS2 without a phase change.

When the second port B of the switch circuit 370 is turned on by the phase control signal CS2, when the first simulation signal RS1 passes through the first hybrid power combiner 310, the phase change occurs. However, the phase is modulated by 90 degrees while passing through the second hybrid power combiner 330 and output as the second simulated signal RS2.

When the third port C of the switch circuit 370 is turned on by the phase control signal CS2, the first simulation signal RS1 has a 180 degree phase only when passing through the first hybrid power combiner 310. It is modulated and output as the second simulation signal RS2.

In addition, when the fourth port D of the switch circuit 370 is turned on by the phase control signal CS2, the first simulation signal RS1 may be 180 degrees when passing through the first hybrid power combiner 310. The phase is modulated, and the phase is further modulated by 90 degrees while passing through the second hybrid power combiner 330, so that a total of 270 degrees is modulated and output as the second simulation signal RS2.

The output second simulated signal RS2 is input to the digital attenuator 400, and the digital attenuator 400 responds to the amplitude control signal CS3 input from the synchronous control circuit 150. Is modulated and output as the third simulated signal RS3.

The synchronization control circuit 150 generates an amplitude control signal CS3 based on the amplitude information A1 to A3 transmitted from the amplitude generation circuit 120, and transmits the amplitude control signal CS3 to the digital attenuator 400.

In addition, the pulse generating switch 500 determines the pulse characteristics of the third simulation signal RS3 in response to the pulse control signal CS4 input from the synchronous control circuit 150 and outputs the final radar signal.

In this case, the synchronous control circuit 150 may generate the pulse control signal CS4 based on the pulse information P1 to P3 input from the pulse generation circuit 130.

4 is a flowchart illustrating a radar simulation signal generating method according to an exemplary embodiment of the present invention.

1 to 4, when data D1 to D3 are input from the computer 50 (S10), the frequency generating circuit 110 of the digital control circuit 100 receives the input data D1 to D3. Frequency information (F1 ~ F2) corresponding to each is generated and output to the synchronous control circuit 150 (S30).

The amplitude generation circuit 120 of the digital control circuit 100 generates amplitude information A1 to A3 corresponding to each of the input data D1 to D3 and outputs the amplitude information A1 to A3 to the synchronous control circuit 150 (S50).

In addition, the pulse generation circuit 130 generates pulse information P1 to P3 corresponding to each of the input data D1 to D3 and outputs the pulse information P1 to P3 to the synchronous control circuit 150 (S70).

In FIG. 4, the radar simulation signal generating method according to an embodiment of the present invention is illustrated as being sequentially performed in steps S30, S50, and S70. Can be interchanged.

Meanwhile, the synchronous control circuit 150 outputs the frequency information F1 to F3 input according to the corresponding data to the digital tuning signal generator 200 (S100).

The digital tuning signal generator 200 frequency modulates each of the basic frequency patterns generated by the frequency information F1 to F3 in response to the frequency control signal CS1 input from the frequency modulation control circuit 170. It outputs as one simulation signal RS1 (S130).

The phase modulation circuit 300 modulates a phase of the first simulation signal RS1 in response to the phase control signal CS2 input from the phase modulation control circuit 180 and outputs the second simulation signal RS2 as a second simulation signal RS2 (S150). ).

The digital attenuator 400 modulates the pulse amplitude of the second simulated signal RS2 in response to the pulse amplitude control signal CS3 input from the synchronous control circuit 150 and outputs it as a third simulated signal RS3 (S170). ).

The pulse generation switch 500 determines the pulse characteristics of the third simulation signal RS3 in response to the pulse control signal CS4 received from the synchronous control circuit 150, and the radar simulation signal generator 10 as a final radar signal. Output to the outside (S200).

As described above, the apparatus for generating a radar simulation signal may generate a high speed broadband radar simulation signal using a pulse compression technique and a time division technique through frequency modulation and phase modulation. Therefore, in terms of cost and efficiency, it is possible to dramatically improve the performance verification of radar signal collection and analysis equipment.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

10: radar simulation signal generator
50: computer
100: digital control circuit
110: frequency generating circuit
120: amplitude generating circuit
130: pulse generating circuit
150: synchronous control circuit
170: frequency modulation control circuit
180: phase modulation control circuit
200: digital tuning signal generator
300: phase modulation circuit
310: first hybrid power coupler
330: second hybrid power combiner
350: third hybrid power coupler
370: switch circuit
400: digital attenuator
500: pulse generating switch

Claims (6)

A digital tuning signal generator for generating a basic signal corresponding to the received frequency information and time-dividing and outputting a first mock signal modulated with a frequency of the basic signal in response to a frequency control signal;
A pulse generation switch configured to receive a time-divided first simulation signal outputted from the digital tuning signal generator, determine a pulse characteristic of the received first simulation signal in response to a pulse control signal, and output the radar simulation signal; And
A pulse control signal for generating a frequency control signal for controlling frequency modulation of the frequency information and the basic signal corresponding to the input data and outputting the frequency control signal to the digital tuning signal generator, and for determining a pulse characteristic of the first simulated signal; Radar simulation signal generator comprising a; digital control circuit for generating and outputting to the pulse generating switch. The apparatus of claim 1, wherein the radar simulation signal generator comprises:
And a phase modulation circuit for modulating a phase of the first simulated signal output from the digital tuning signal generator in response to a phase control signal and outputting the modulated phase to the pulse generation switch.
And the digital control circuit generates the phase control signal for controlling phase modulation of the first simulated signal and outputs the phase control signal to the phase modulation circuit. The apparatus of claim 1, wherein the radar simulation signal generator comprises:
And a digital step attenuator for modulating the amplitude of the first simulated signal output from the digital tuning signal generator in response to the amplitude control signal and outputting the modulated amplitude to the pulse generation switch.
And the digital control circuit generates the amplitude control signal for controlling amplitude modulation of the first simulated signal and outputs the amplitude control signal to the digital step attenuator. delete Generating and outputting frequency information corresponding to the input data by the digital control circuit;
Generating, by the digital tuning signal generator, a basic signal based on the output frequency information, and generating a first simulated signal obtained by modulating a frequency of the generated basic signal;
Time-dividing and outputting the generated first simulated signal by the digital tuning signal generator;
A phase modulating circuit modulating a phase of the time-division outputted first simulated signal and outputting the second simulated signal;
A digital attenuator modulating the amplitude of the output second simulated signal and outputting it as a third simulated signal; And
And determining, by a pulse generating switch, pulse characteristics of the output third simulated signal as a radar simulation signal, and generating the radar simulation signal. delete

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