KR20220120321A - Apparatus and method for processing signal of active phased array radar - Google Patents

Abstract

According to an exemplary embodiment of the present invention, an apparatus and method for processing a signal of an active phased array radar may improve measurement accuracy of the active phased array radar as one dwell includes a plurality of bursts to which transmission signals independent to each other are assigned.

Description

Apparatus and method for processing signal of active phased array radar

The present invention relates to an apparatus and method for processing a signal of an active phased array radar, and more particularly, to an apparatus and method for improving the measurement accuracy of an active phased array radar.

Active phased array radar is a radar that effectively performs multiple functions by using fast beam agility, and optimally performs multiple functions at the same time by operating an appropriate radar waveform according to the performance required for each function. .

1 is a diagram for explaining an active beam configuration of a conventional active phased array radar.

Referring to Figure 1, the active phased array radar simultaneously performs detection, track while scan (TWS) for multiple targets, active tracking for multiple targets to engage, system calibration, etc., and the dwell ( dwell) is allocated. Here, the dwell means the time the radar stays at one point in space, and in the active phased array radar, it may be expressed as a minimum time unit for performing a function.

A burst exists in which several detailed functions can be performed within one dwell, which is a unit of function execution, and the radar performs one function through the combination of bursts. In addition, multiple pulse trains may exist in the burst to perform detailed functions, which is called a pulse repetition interval (PRI).

For example, in order to perform a detection function, the radar forms a detection function dwell, and in order to obtain target information without ambiguity through detection, multiple bursts may be used as shown in FIG. 1 , and each burst has a Multiple transmit pulses may be used to obtain a signal to noise ratio (SNR). According to the function, one burst or multiple bursts may exist in one dwell, and one pulse or multiple pulses may exist in one burst.

The active tracking process of the active phased array radar analyzes the received target signal and then generates a new active tracking beam, and the search beam allocates a new active beam to connect the detected target to tracking. In order to improve the measurement accuracy, it is necessary to reflect the active beam results in real time in the active beam generation to be operated next.

If the real-time beam operation flow is disrupted due to the signal processing and data processing time delays of the active beam, the previous active beam results will be reflected in the active beam command after several dwells, which will degrade the accuracy of the target and even cause continuous data delay. Problems can arise where the target is lost or the radar signal processing stops working.

In order to solve the real-time problem, it is necessary to allocate a large active beam time in consideration of the signal processing delay time, which causes a waste of resources.

Another solution is to use high-performance processing hardware to minimize signal processing time delay, which is relatively expensive.

This real-time signal processing process can occur greatly when the target approaches a short distance, which increases the signal-to-noise ratio (SNR) performance of the target as it approaches a short distance, requiring a short dwell time. Because real-time operation is not possible, there is a technical limitation (requires a margin in consideration of the processing time delay) that has no choice but to waste resources in consideration of the processing time delay.

2 is a view for explaining an active beam operation process of a conventional active phased array radar.

Referring to FIG. 2 , in one active beam (one dwell), a detection plot is generally extracted using one burst, or a final plot is obtained after using several bursts only for the purpose of removing ambiguity. operate with

When the search active beam is operated, the tracking switching ability is deteriorated by requesting the tracking switching beam from the resource management unit based on target information having a relatively large accuracy error.

When the tracking active beam is operated, the results of multiple active beams (dwell for multiple active beams) are continuously injected into the tracking filter to improve the target's positional accuracy.

In summary, in order to improve the accuracy performance of the conventional active phased array radar, it is necessary to minimize the tracking error by making the tracking revisit cycle as fast as possible. As a result, there is a limit to the minimization of the tracking beam revisit period. In order to overcome this problem, conventional radars improve accuracy performance by using high-performance signal processing hardware or by increasing the transmission beam output.

That is, in order to improve the accuracy performance, the quality of the filter output can be improved by improving the quality of the target reflected signal or shortening the revisit time of the tracking cycle, and by putting as many characteristics of the target signal that change for a short time as possible into the tracking filter input. should be improved

In order to improve the quality of the target reflected signal in the conventional radar, it was necessary to improve the signal-to-noise ratio (SNR). A large heat dissipation system is required due to an increase in current consumption and heat generation. In addition, in order to improve an antenna gain to improve a signal-to-noise ratio (SNR), a relatively large size antenna is required.

In order to improve the tracking accuracy by minimizing the tracking revisit period of the target, it is necessary to use high-performance signal processing hardware for reducing the signal processing delay time, which is relatively expensive.

Accordingly, the fire control radar that operates the weapon must provide the accuracy required by the armament to support the response to the target. I need this.

An object of the present invention is to improve the measurement accuracy of an active phased array radar by including a plurality of bursts to which one dwell is allocated a transmit signal independent of each other, the signal of an active phased array radar To provide a processing apparatus and method.

Other objects not specified in the present invention may be additionally considered within the scope that can be easily inferred from the following detailed description and effects thereof.

According to a preferred embodiment of the present invention for achieving the above object, there is provided a signal processing apparatus for an active phased array radar, comprising: a radar transmitter for transmitting an active beam according to a control signal; a radar receiver for receiving a target reflection signal in which the active beam transmitted through the radar transmitter is reflected from a target; a signal processing unit configured to acquire target detection information in dwell units based on the target reflection signal received through the radar receiving unit; a tracking unit configured to acquire target tracking information in units of the dwell based on the target detection information acquired through the signal processing unit; a resource management unit for allocating active beam resources based on the target tracking information acquired through the tracking unit and obtaining a control command; and a radar control unit that acquires the control signal in units of the dwell unit based on the control command obtained through the resource management unit and provides the obtained control signal to the radar transmitter; a plurality of bursts to which independent transmission signals are allocated, wherein the signal processing unit obtains sub-target detection information for each of the plurality of bursts, and based on the obtained plurality of sub-target detection information The target detection information is acquired in the dwell unit.

Here, the burst is performed by using at least one of a method using independent code modulation for a transmission waveform, a method using an independent polarization characteristic of an antenna, and a method using an independent frequency signal, so that an independent transmission signal is can be assigned.

Here, the signal processing unit may obtain the target detection information in units of the dwell by averaging the plurality of sub-target detection information.

Here, the signal processing unit may acquire the target detection information in units of the dwell by weighting the plurality of sub-target detection information based on a signal to noise ratio (SNR).

Here, the signal processing unit aligns a plurality of the sub-target detection information based on a signal-to-noise ratio (SNR), and weight-sums the aligned plurality of the sub-target detection information according to a preset criterion to obtain the target detection information can do.

Here, the target detection information may include a distance, a speed, an azimuth and an elevation with respect to the target.

Here, the radar receiver may convert the received target reflected signal into an intermediate frequency (IF), convert the intermediate frequency into a digital signal, and provide the converted digital signal to the signal processing unit .

Here, the signal processing unit processes the digital signal in units of the burst according to a preset algorithm to obtain the sub-target detection information, and based on the plurality of sub-target detection information acquired for each burst, The target detection information may be obtained.

According to a preferred embodiment of the present invention for achieving the above object, there is provided a signal processing method of an active phased array radar, comprising: transmitting an active beam according to a control signal; receiving a target reflection signal by which the active beam is reflected from the target; acquiring target detection information in dwell units based on the target reflection signal; acquiring target tracking information in the dwell unit based on the target detection information; allocating an active beam resource based on the target tracking information and obtaining a control command; and acquiring the control signal in units of the dwell based on the control command, wherein one dwell includes a plurality of bursts to which mutually independent transmission signals are allocated, and the target detection The information acquisition step may include acquiring sub-target detection information for each of the plurality of bursts, and acquiring the target detection information in units of the dwell based on the acquired plurality of sub-target detection information.

Here, the burst is performed by using at least one of a method using independent code modulation for a transmission waveform, a method using an independent polarization characteristic of an antenna, and a method using an independent frequency signal, so that an independent transmission signal is can be assigned.

Here, the step of acquiring the target detection information may include acquiring the target detection information in units of the dwell by averaging a plurality of the sub-target detection information.

Here, the step of acquiring the target detection information may include acquiring the target detection information in units of the dwell by weighting and summing the plurality of sub-target detection information based on a signal to noise ratio (SNR). .

A computer program according to a preferred embodiment of the present invention for achieving the above technical problem is stored in a computer-readable recording medium and executes any one of the signal processing methods of the active phased array radar in the computer.

According to the signal processing apparatus and method of the active phased array radar according to a preferred embodiment of the present invention, one dwell (dwell) includes a plurality of bursts to which independent transmission signals are allocated, the active phased array radar can improve the measurement accuracy of

That is, the present invention can improve the real-time of signal processing by securing a large dwell signal processing time by allocating multiple bursts in one dwell signal processing.

In addition, the present invention can improve accuracy by operating an independent transmission signal for each N bursts and performing dwell signal processing from detection plots measured for each burst.

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

1 is a diagram for explaining an active beam configuration of a conventional active phased array radar.
2 is a view for explaining an active beam operation process of a conventional active phased array radar.
3 is a block diagram illustrating a signal processing apparatus of an active phased array radar according to a preferred embodiment of the present invention.
4 is a diagram for explaining a signal processing process according to a preferred embodiment of the present invention.
5 is a view for explaining an active beam operation process according to a preferred embodiment of the present invention.
6 is a diagram for explaining the accuracy of the active beam of the conventional active phased array radar. FIG. 6 (a) shows a measurement error according to a distance, and FIG. 6 (b) shows a measurement accuracy according to a distance.
7 is a view for explaining active beam accuracy according to a preferred embodiment of the present invention, in which (a) of FIG. 7 shows a measurement error according to a distance, and (b) of FIG. 7 shows a measurement accuracy according to a distance .
8 is a flowchart illustrating a signal processing method of an active phased array radar according to a preferred embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments published below, but may be implemented in various different forms, and only these embodiments make the publication of the present invention complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not to be interpreted ideally or excessively unless clearly defined in particular.

In the present specification, terms such as “first” and “second” are for distinguishing one component from other components, and the scope of rights should not be limited by these terms. For example, a first component may be termed a second component, and similarly, a second component may also be termed a first component.

In the present specification, identification symbols (eg, a, b, c, etc.) in each step are used for convenience of description, and identification symbols do not describe the order of each step, and each step is clearly Unless a specific order is specified, the order may differ from the specified order. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

In this specification, expressions such as “have”, “may have”, “include” or “may include” indicate the presence of a corresponding feature (eg, a numerical value, function, operation, or component such as a part). and does not exclude the presence of additional features.

In addition, the term '~ unit' as used herein means software or a hardware component such as a field-programmable gate array (FPGA) or ASIC, and '~ unit' performs certain roles. However, '-part' is not limited to software or hardware. '~unit' may be configured to reside on an addressable storage medium or may be configured to refresh one or more processors. Thus, as an example, '~' denotes components such as software components, object-oriented software components, class components, and task components, and processes, functions, properties, and procedures. , subroutines, segments of program code, drivers, firmware, microcode, circuitry, data structures and variables. The functions provided in the components and '~ units' may be combined into a smaller number of components and '~ units' or further separated into additional components and '~ units'.

Hereinafter, a preferred embodiment of a signal processing apparatus and method of an active phased array radar according to the present invention will be described in detail with reference to the accompanying drawings.

First, a signal processing apparatus of an active phased array radar according to a preferred embodiment of the present invention will be described with reference to FIG. 3 .

3 is a block diagram illustrating a signal processing apparatus of an active phased array radar according to a preferred embodiment of the present invention.

Referring to FIG. 3 , in the active phased array radar signal processing apparatus (hereinafter referred to as 'signal processing apparatus') 100 according to a preferred embodiment of the present invention, one dwell allocates independent transmission signals. The inclusion of a plurality of bursts in the active phase improves the measurement accuracy of active phased array radars.

Here, the burst can be assigned an independent transmission signal using at least one of a method using independent code modulation for a transmission waveform, a method using an independent polarization characteristic of an antenna, and a method using an independent frequency signal. have.

To this end, the signal processing apparatus 100 may include a radar receiving unit 110 , a signal processing unit 120 , a tracking unit 130 , a resource management unit 140 , a radar control unit 150 , and a radar transmitting unit 160 . .

The radar receiver 110 receives a target reflection signal in which the active beam transmitted through the radar transmitter 160 is reflected from the target.

In this case, the radar receiver 110 converts the received target reflected signal to an intermediate frequency (IF), converts the intermediate frequency into a digital signal, and provides the converted digital signal to the signal processing unit 120 . .

The signal processing unit 120 acquires target detection information in dwell units based on the target reflection signal received through the radar receiving unit 110 .

Here, the target detection information may include a distance, a speed, an azimuth, and an elevation with respect to the target.

That is, the signal processing unit 120 may acquire sub-target detection information for each of a plurality of bursts, and may acquire target detection information in units of dwell based on the acquired plurality of sub-target detection information. Here, the sub-target detection information is obtained from information about one burst, and may include a distance, a speed, an azimuth, and an elevation to the target.

At this time, the signal processing unit 120 obtains sub-target detection information by processing the digital signal provided through the radar receiving unit 110 in burst units according to a preset algorithm, and based on a plurality of sub-target detection information acquired for each burst. can acquire target detection information in dwell units.

For example, the signal processing unit 120 may acquire target detection information in units of dwell by averaging a plurality of sub-target detection information.

Also, the signal processing unit 120 may acquire target detection information in units of dwell by weighting and summing a plurality of sub-target detection information based on a signal to noise ratio (SNR). That is, the signal processing unit 120 aligns the plurality of sub-target detection information based on the signal-to-noise ratio (SNR), and weights and sums the aligned plurality of sub-target detection information according to a preset criterion to obtain target detection information. have.

The tracker 130 acquires target tracking information in units of dwell based on the target detection information acquired through the signal processor 120 .

The resource manager 140 allocates an active beam resource based on the target tracking information acquired through the tracker 130 and acquires a control command.

The radar control unit 150 obtains a control signal in units of dwell based on the control command obtained through the resource management unit 140 , and provides the obtained control signal to the radar transmission unit 160 .

The radar transmitter 160 transmits an active beam according to a control signal provided through the radar controller 150 .

Next, a signal processing process of an active phased array radar according to a preferred embodiment of the present invention will be described in more detail with reference to FIGS. 4 and 5 .

FIG. 4 is a view for explaining a signal processing process according to a preferred embodiment of the present invention, and FIG. 5 is a view for explaining an active beam operation process according to a preferred embodiment of the present invention.

Referring to FIG. 4 , the radar transmitter 160 receives a control signal, amplifies power according to the received control signal, and transmits a transmission beam according to a pulse repetition interval (PRI).

The radar receiver 110 receives a target reflected signal reflected by a transmission beam transmitted through the active phased array antenna device hitting a target, converts the received target reflected signal into an intermediate frequency (IF), and AD (analog to digital) ) is converted into a digital signal through a converter, and the digital signal is transmitted to the signal processing unit 120 .

The signal processing unit 120 performs signal processing algorithms (pulse compression, FFT, CFAR, target association, etc.) planned in burst units, and then collects burst results (sub-target detection information) within one dwell and processes the signals to avoid ambiguity. The resolved final target detection information is provided to the tracking unit 130 in units of dwell.

The tracking unit 130 processes the target detection information for the target target to be tracked, outputs the estimated position tracking error of the target, and provides the result to the resource management unit 140 in dwell units.

The resource management unit 140 is the uppermost control unit of the active phased array radar, and reflects the input result of the tracking unit 130 to allocate active beam resources and generate a control command.

The radar control unit 150 generates a control signal by dividing it for each active beam (dwell) operated based on a control command allocated through resource management, and sequentially transmits the control signal to the radar transmission unit 160 .

The radar transmitter 150 receives a control signal and transmits a tracking beam in a beam steering direction corresponding to the control signal.

5 , in order to improve the accuracy of the active phased array radar, in the present invention, a plurality of bursts are included in one active beam (dwell for active tracking), and an independent transmission signal is allocated to each burst and operated, and then the dwell It is a method to obtain a single high-accuracy detection signal by properly combining the plot information detected through a plurality of bursts at the signal processing stage and processing the signal once more.

Among the features of the present invention, the real-time improvement part has the advantage of greatly securing the dwell signal processing time by allocating several bursts in one dwell signal processing. This indicates that when N bursts are used, N times the signal processing time can be secured compared to the prior art. Each step of the signal processing process shown in FIG. 4 is sequentially performed, and after each step, the signal is processed and data is transmitted through communication. Therefore, communication time and time in the sequential signal processing process occur, and if the dwell signal processing time is improved as shown in FIG. 5, the signal processing of each burst can be processed in parallel and the communication time in the signal processing process The improvement is approximated to N times of FIG.

Among the features of the present invention, the accuracy improvement part is to allocate and operate an independent transmission signal to each of the N bursts, so that it has a radar cross section (RCS) characteristic independent of the target, and N detection targets of the independent characteristic It is a method to obtain a single plot with improved measurement accuracy by combining dwell signal processing.

According to the present invention, it is possible to provide relatively excellent tracking switching capability by providing relatively excellent accuracy target information when operating the search active beam and requesting the tracking switching beam to the resource management unit 140 based on this. When the tracking beam is operated, target information with relatively high accuracy is input to the tracking unit 130 to provide finally improved tracking accuracy.

In order to improve active beam tracking accuracy, the tracking revisit period should be minimized and input to the tracking unit 130 , and the accuracy of the output of the tracking unit 130 should be improved by minimizing the tracking revisit period. However, there is a disadvantage in that performance is limited due to signal processing and data processing delay. However, the present invention has the effect of improving the accuracy of the output performance of the tracking unit 130 by greatly improving the measurement accuracy of the target measurement value that is input to the tracking unit 130 .

Then, the performance of the signal processing process of the active phased array radar according to a preferred embodiment of the present invention will be described with reference to FIGS. 6 and 7 .

6 is a view for explaining the accuracy of the active beam of the conventional active phased array radar, (a) of FIG. 6 shows the measurement error according to the distance, (b) of FIG. 6 shows the measurement accuracy according to the distance, 7 is a view for explaining active beam accuracy according to a preferred embodiment of the present invention, in which (a) of FIG. 7 shows a measurement error according to a distance, and (b) of FIG. 7 shows a measurement accuracy according to a distance .

Independent signal operation for each N bursts according to the present invention provides an independent target characteristic for each burst, thereby generating an effect of improving accuracy during dwell signal processing. When operating with non-independent signals, N target characteristics are formed similarly, and there is no effect of improving accuracy.

Accordingly, the present invention can improve accuracy in a wide range from a long-range target having a small signal-to-noise ratio (SNR) to a short-range target.

6 is a modeling and simulation of accuracy at the input terminal of the tracker according to the conventional active beam operation process shown in FIG. 2, and FIG. modeled and simulated the accuracy of At this time, the measurement error and measurement accuracy may be different depending on the hardware specification of the radar system, and the measurement error and measurement accuracy shown in FIGS. 6 and 7 assumes the hardware use of a specific radar system, and the conventional active beam operation The analysis was performed with significance on the amount of error improvement between the process (see FIG. 2 ) and the active beam operation process (see FIG. 5 ) of the present invention.

As shown in FIGS. 6 (a) and 7 (a), the signal-to-noise ratio (SNR) of the target reflected signal deteriorates as the distance increases, and the accuracy as a function of the signal-to-noise ratio (SNR) is an error will grow In addition, the amount of accuracy error increases due to Glint completion at close range.

배로 개선되게 된다.As shown in FIGS. 6A and 7A , it can be confirmed that the measurement error of the present invention is improved by about 2 times by using 4 bursts. That is, the measurement error is for the use of N bursts.

will be improved by boat.

As shown in FIGS. 6 (b) and 7 (b), the amount of improvement in the accuracy of the output stage of the tracking unit varies depending on the design and optimization degree of the tracking filter, but in general, it is improved by ½ compared to the accuracy of the input stage of the tracking unit. can be checked

Then, a signal processing method of an active phased array radar according to a preferred embodiment of the present invention will be described with reference to FIG. 8 .

8 is a flowchart illustrating a signal processing method of an active phased array radar according to a preferred embodiment of the present invention.

Referring to FIG. 8 , the signal processing apparatus 100 transmits an active beam according to a control signal ( S110 ).

Thereafter, when the active beam receives the target reflection signal reflected from the target ( S120 ), the signal processing apparatus 100 acquires target detection information in dwell units based on the target reflection signal ( S130 ).

That is, the signal processing apparatus 100 may acquire sub-target detection information for each of a plurality of bursts, and may acquire target detection information in units of dwell based on the acquired plurality of sub-target detection information. In this case, the signal processing apparatus 100 may convert the received target reflected signal into an intermediate frequency (IF) and convert the intermediate frequency into a digital signal. In addition, the signal processing apparatus 100 processes the digital signal in burst units according to a preset algorithm to obtain sub-target detection information, and based on a plurality of sub-target detection information acquired for each burst, target detection information in dwell units can be obtained

For example, the signal processing apparatus 100 may obtain target detection information in units of dwell by averaging a plurality of sub-target detection information. Also, the signal processing apparatus 100 may obtain target detection information in units of dwell by weighting and summing a plurality of sub-target detection information based on a signal-to-noise ratio (SNR). That is, the signal processing apparatus 100 aligns a plurality of sub-target detection information based on a signal-to-noise ratio (SNR), and weight-sums the aligned plurality of sub-target detection information according to a preset criterion to obtain target detection information. can

Then, the signal processing apparatus 100 acquires target tracking information in units of dwell based on the target detection information ( S140 ).

Then, the signal processing apparatus 100 allocates an active beam resource based on the target tracking information and obtains a control command (S150).

Then, the signal processing apparatus 100 acquires a control signal in units of dwell units based on the control command ( S160 ).

As described above, the present invention includes a plurality of bursts in one active tracking beam (dwell for active tracking) in order to improve the accuracy of the active phased array radar, and allocates and operates a transmission signal of an independent characteristic for each burst, It is a method to obtain a single high-accuracy detection signal by appropriately combining the plot information detected through multiple bursts at the dwell signal processing stage and processing the signal once more.

Accordingly, the present invention can improve the real-time of signal processing by securing a large dwell signal processing time by allocating multiple bursts in one dwell signal processing.

In addition, the present invention can improve accuracy by operating an independent transmission signal for each N bursts and performing dwell signal processing from detection plots measured for each burst.

In order to improve the accuracy performance, improve the quality of the target reflection signal or shorten the revisit time of the tracking cycle, and improve the quality of the output of the tracker by putting as much of the characteristics of the target signal that is changed for a short time into the input of the tracker. have to do The present invention provides the effect of efficiently improving the accuracy without increasing the hardware burden. In addition, the present invention can be applied to various fields (fire control radar, vehicle radar, short-range tracking radar, etc.) to improve the accuracy of the detected target and the accuracy of target information.

Even if all the components constituting the embodiment of the present invention described above are described as being combined or operated in combination, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more. In addition, although all of the components may be implemented as one independent hardware, some or all of the components are selectively combined to perform some or all functions of the combined components in one or a plurality of hardware program modules It may be implemented as a computer program having In addition, such a computer program is stored in a computer readable media such as a USB memory, a CD disk, a flash memory, etc., read and executed by the computer, thereby implementing the embodiment of the present invention. The computer program recording medium may include a magnetic recording medium, an optical recording medium, and the like.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes and substitutions are possible within the scope that does not depart from the essential characteristics of the present invention by those of ordinary skill in the art to which the present invention pertains. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are for explaining, not limiting, the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments and the accompanying drawings. . The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100: signal processing unit,
110: radar receiver,
120: signal processing unit,
130: tracking unit;
140: resource management department;
150: radar control unit;
160: radar transmitter

Claims (13)

a radar transmitter for transmitting an active beam according to a control signal;
a radar receiver for receiving a target reflection signal in which the active beam transmitted through the radar transmitter is reflected from a target;
a signal processing unit for acquiring target detection information in dwell units based on the target reflection signal received through the radar receiving unit;
a tracking unit configured to acquire target tracking information in units of the dwell based on the target detection information acquired through the signal processing unit;
a resource management unit for allocating active beam resources based on the target tracking information acquired through the tracking unit and obtaining a control command; and
a radar control unit for obtaining the control signal in the dwell unit based on the control command obtained through the resource management unit, and providing the obtained control signal to the radar transmission unit;
includes,
One said dwell,
including a plurality of bursts to which transmission signals independent of each other are allocated,
The signal processing unit,
acquiring sub-target detection information for each of the plurality of bursts, and acquiring the target detection information in units of the dwell based on the acquired plurality of sub-target detection information,
Signal processing unit for active phased array radar. In claim 1,
The burst is
Independent transmission signals are allocated using at least one of a method using independent code modulation for a transmission waveform, a method using an independent polarization characteristic of an antenna, and a method using an independent frequency signal,
Signal processing unit for active phased array radar. In claim 1,
The signal processing unit,
Obtaining the target detection information in units of the dwell by averaging the plurality of sub-target detection information,
Signal processing unit for active phased array radar. In claim 1,
The signal processing unit,
Acquiring the target detection information in units of the dwell by weighting and summing a plurality of the sub-target detection information based on a signal to noise ratio (SNR),
Signal processing unit for active phased array radar. In claim 4,
The signal processing unit,
Sorting the plurality of sub-target detection information based on a signal-to-noise ratio (SNR), and weighting summing the aligned plurality of sub-target detection information according to a preset criterion to obtain the target detection information,
Signal processing unit for active phased array radar. In claim 1,
The target detection information is
including distance, velocity, azimuth and elevation relative to the target;
Signal processing unit for active phased array radar. In claim 1,
The radar receiver,
Converting the received target reflected signal to an intermediate frequency (intermediate frequency, IF), converting the intermediate frequency into a digital signal, and providing the converted digital signal to the signal processing unit,
Signal processing unit for active phased array radar. In claim 7,
The signal processing unit,
Obtaining the sub-target detection information by processing the digital signal in the burst unit according to a preset algorithm, and acquiring the target detection information in the dwell unit based on the plurality of sub-target detection information acquired for each burst ,
Signal processing unit for active phased array radar. transmitting the active beam according to the control signal;
receiving a target reflection signal by which the active beam is reflected from the target;
acquiring target detection information in dwell units based on the target reflection signal;
acquiring target tracking information in the dwell unit based on the target detection information;
allocating an active beam resource based on the target tracking information and obtaining a control command; and
acquiring the control signal in the dwell unit based on the control command;
includes,
One said dwell,
including a plurality of bursts to which transmission signals independent of each other are allocated,
The target detection information acquisition step includes:
Obtaining sub-target detection information for each of the plurality of bursts, and acquiring the target detection information in units of the dwell based on the acquired plurality of sub-target detection information,
Signal processing method of active phased array radar. In claim 9,
The burst is
Independent transmission signals are allocated using at least one of a method using independent code modulation for a transmission waveform, a method using an independent polarization characteristic of an antenna, and a method using an independent frequency signal,
Signal processing method of active phased array radar. In claim 9,
The target detection information acquisition step includes:
Comprising of averaging the plurality of sub-target detection information to obtain the target detection information in units of the dwell,
Signal processing method of active phased array radar. In claim 9,
The target detection information acquisition step includes:
Based on a signal to noise ratio (SNR), weighted summing the plurality of sub-target detection information to obtain the target detection information in units of the dwell,
Signal processing method of active phased array radar. A computer program stored in a computer-readable recording medium for executing the signal processing method of the active phased array radar according to any one of claims 9 to 12 in a computer.

Images