KR101221142B1 - Method and apparatus for estimating source location of radar pulse - Google Patents

Abstract

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a method for estimating a position using a relative phase delay difference of a radar pulse received at an antenna in order to more accurately estimate a position at which a radar pulse is emitted, and an estimation apparatus using the same.
According to one aspect of the present invention, in the radar pulse source position estimation apparatus, a receiving unit for receiving a radar pulse signal emitted from the radar through the antenna, a rectifier for converting the radar pulse signal received through the receiving unit into a low frequency signal and It provides a radar pulse source source estimation apparatus including a processing unit for estimating the position of the radar pulse source using the low frequency signal converted through the rectifier.
According to still another aspect of the present invention, in the method for estimating the position of a radar pulse source, (a) receiving a radar pulse signal emitted from a radar through an antenna (b) receiving the radar pulse signal received from the rectifier circuit It provides a method for estimating the position of the radar pulse source comprising the step of converting to a low frequency using the (c) and the position of the radar pulse generation source with the radar pulse signal converted into a low frequency.

Description

Radar pulse source location estimation method and estimation device using same {METHOD AND APPARATUS FOR ESTIMATING SOURCE LOCATION OF RADAR PULSE}

The present invention relates to a method for estimating the location of a radar pulse source and an estimation device using the same, and more particularly, to an apparatus and a method for more accurately estimating a position where a radar pulse is emitted.

Radar Warning Receivers (RWRs) are basically similar to radars, but radars actively radiate and receive their reflected waves, while radar alarm receivers receive radar waves of all frequencies but actively radar It is a device that performs identification identification or foe (IFF) by receiving radar radio waves from enemy radars and informs the bandit's distance and defense.

The conventional radar alarm receiver estimates the approximate distance and azimuth by considering the attenuation rate according to the distance of the received intensity intensity of the radar pulse received by the antenna as the first method for estimating the position of the device that emitted the radar pulse. In the second method, the azimuth angle and the elevation angle were calculated using the arrival phase delay difference between the two sensor units of the ultra-high frequency radar pulse signal of several tens of GHz, and the approximate position was estimated by the direction.

The problem in the case of the conventional first method is that it is difficult to estimate the position because the latest radar is applying various techniques in order not to be exposed to the counter radar alarm receiver. Among them, the typical technique is to randomly change the radar propagation intensity and the pulse repetition frequency (PRF), so that the radar alarm receiver of the other party is disturbed so that the radar pulse cannot be analyzed and the position and state of the radar pulse are emitted. do. Therefore, when the radar pulse divergence intensity changes from time to time, the radar pulse divergence position cannot be estimated.

가 레이더 펄스 주파수의 반 파장

보다 짧아야 하는 제한 조건이 발생하게 된다. 결과적으로 레이더 펄스가 수십 GHz에 달하는 초고주파이므로, 센서 유닛은 매우 짧은 거리를 두고 설치되어야 한다. 예를 들어, 레이더 펄스가 10 GHz까지 처리되기 위해서는 센서 유닛간 거리는 15mm 이내로 제한된다. 센서 유닛간의 거리가 짧아지면 위치 추정 가능한 영역이 제한 받게 되며, 방위각(Azimuth Angle)과 상하각(Elevation Angle)의 방향성만으로 한 지점을 추정하기 위해서는 항공기가 일정 거리를 이동하여야 하며, 항공기가 이동하는 동안 방위각과 상하각이 지시하는 하나의 지점을 역 추정하게 된다. 이 경우, 항공기가 직선경로를 이동하거나 이동경로가 짧은 경우 혹은, 상대 항공기가 빠른 속도로 이동하는 경우 한 지점을 잡기가 어려우며 정확도가 크게 떨어지게 된다.In the case of the conventional second method, the problem is that the distance between the antenna receivers is calculated in order to obtain the azimuth and vertical angle using the phase delay difference.

Half wavelength of the radar pulse frequency

There is a constraint that must be shorter. As a result, the radar pulse is a very high frequency of several tens of GHz, so the sensor unit should be installed at a very short distance. For example, in order for radar pulses to be processed up to 10 GHz, the distance between the sensor units is limited to within 15 mm. If the distance between the sensor units is shortened, the area that can be estimated is limited.In order to estimate a point using only the azimuth angle and the elevation angle, the aircraft must move a certain distance. In this case, one point indicated by the azimuth angle and the vertical angle is reversely estimated. In this case, when the aircraft moves on a straight path or the movement path is short, or when the other aircraft moves at a high speed, it is difficult to catch a point and the accuracy is greatly reduced.

In addition, in order to process the digital signal, the Nyquist frequency of the frequency of interest should be sampled at 2.56 times or more, and in order to quantize the ultra-high frequency signal of several tens of GHz and process it as a digital signal, hardware processing speed will be limited. Large data processing capacity is required.

Accordingly, an aspect of the present invention is to provide a method for estimating a position by using a relative phase delay difference of a radar pulse received at an antenna in order to more accurately estimate a position at which a radar pulse is emitted, and an estimation apparatus using the same. .

As a means of the present invention for achieving the above object, the invention of claim 1, the apparatus for estimating the position of generating an irregular high frequency radar pulse signal, comprising: a receiver for receiving the radar pulse signal through an antenna; A rectifier for converting the radar pulse signal received through the receiver into a low frequency signal; And a processor configured to estimate a position of a radar pulse generation source using the low frequency signal converted by the rectifier. Wherein the processing unit estimates the position of the radar pulse generating source using the arrival time delay difference of the radar pulse signal received by at least two receiving units, and obtains an irregular arrival time delay difference of the radar pulse signal. In addition, the present invention provides a radar pulse source position estimation apparatus using a cross-spectrum function in a frequency domain.

The invention according to claim 2, wherein the amplifying unit for amplifying the radar pulse signal received through the receiving unit and a filter unit to pass only a frequency of a specific band to the radar pulse signal amplified through the amplifying unit The rectifier further provides a radar pulse source position estimation device, characterized in that for converting the radar pulse signal filtered through the filter unit to a low frequency signal.

The invention as set forth in claim 3, further comprising an output unit for informing the position estimation result of the radar pulse generation source in the processing unit.

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The invention according to claim 7 is a line in which the processing unit connects a point where the arrival distance delay difference obtained by multiplying the movement speed of the radio wave by the arrival time delay difference of the radar pulse signals reaching the two receivers is The apparatus provides a radar pulse source position estimating apparatus for estimating the intersection of two or more hyperbolas generated from three or more receivers as a radar pulse divergence position using a hyperbolic characteristic.

The invention according to claim 8, wherein the processing unit provides a radar pulse source position estimation device, characterized in that a scanning technique is used for a predetermined point to obtain an intersection point of the hyperbola.

A method according to claim 9, further comprising the steps of: (a) receiving the radar pulse signal via an antenna; (b) converting the received radar pulse signal to a low frequency using a rectifier circuit; And (c) estimating a position of a radar pulse generation source using the radar pulse signal converted to a low frequency; Wherein the step (c) comprises estimating the position of the radar pulse generation source using the arrival delay difference of the radar pulse signal reaching at least two antennas, and obtaining the arrival time delay difference of the irregular radar pulse signal. A method of estimating a radar pulse source position is characterized by using a cross-spectrum function in a frequency domain.

The invention according to claim 10, wherein the step (b) comprises: (b1) amplifying the received radar pulse signal, (b2) the amplified radar pulse signal passes only a frequency of a specific band And (b3) converting the radar pulse signal having the passed frequency into a low frequency through a rectifier circuit.

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The invention according to claim 14, wherein the step (c) comprises connecting a point of arrival distance delay difference multiplied by the movement speed of the radio wave to the arrival time delay difference of the radar pulse signal reaching two antennas. The line provides a radar pulse source position estimation method for estimating the intersection of two or more hyperbolas generated from three or more antennas as a radar pulse divergence position using a characteristic of forming a hyperbola.

15. The invention according to claim 15, wherein the step (c) provides a radar pulse source position estimation method, wherein a scanning technique is used for a predetermined point to obtain an intersection point of the hyperbola.

State-of-the-art stealth fighters use a method that randomly changes radar pulse transmission intensity and pulse per unit time (PRF) to avoid exposure to an opponent radar alert receiver. Therefore, according to the present invention, the position is estimated using the relative phase delay difference of the radar pulse received by the antenna, it is possible to estimate the position of the radar pulse emitted even by the above method.

로 나누어 시간 지연 차를 얻음으로써 시간 지연 차를 더욱 크게 가져갈 수 있게 된다.In addition, in the present invention, in order to obtain the time delay difference of the ultra-high frequency radar pulse signal, a rectifier circuit is added to the existing radar alarm receiver to convert the ultra-high frequency radar pulse signal of several tens of GHz into a low frequency signal close to a rectangle having a pulse width of period T. Convert and Frequency to Phase Delay Difference for Low Frequency Signals

By dividing by to obtain the time delay difference, the time delay difference can be made larger.

As a result, in the present invention, the distance between the sensor units can be widened, the area capable of estimating a position can be expanded, and an accurate position can be estimated by applying a scanning technique to a region of interest of an infinite 3D region.

1 is a view schematically showing the configuration of an entire system showing a radar pulse source position estimation apparatus according to an embodiment of the present invention,
2 is a diagram schematically illustrating a circuit configuration of a rectifier according to an embodiment of the present invention.
3 is a diagram illustrating a process of applying a cross spectrum analysis technique to a radar pulse signal passing through a receiver antenna and a rectifier with a time delay according to an embodiment of the present invention.
4A is a diagram illustrating a scanning technique for finding a location where a radar pulse is emitted according to an embodiment of the present invention.
FIG. 4B is a diagram illustrating a result of scanning several time delays of two receiver antennas according to an embodiment of the present invention.
FIG. 4C is a diagram illustrating a result of estimating a position where a radar pulse is emitted in three cases with respect to three receiver antennas according to an exemplary embodiment of the present invention.
FIG. 5 is a diagram illustrating a coordinate setting method for scanning to find a location where a radar pulse is emitted for a 3D area according to an embodiment of the present invention;
6 is a view showing a radar pulse source position estimation method according to an embodiment of the present invention,
7 is a diagram illustrating a step of converting into a low frequency according to an embodiment of the present invention.

DETAILED DESCRIPTION The following detailed description of the invention refers to the accompanying drawings that show, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with one embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and is to be limited only by the appended claims, along with the full scope of the present invention, and all equivalents to which the claims are entitled. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

State-of-the-art stealth fighters use a method of changing the radar pulse transmission intensity and the pulse per unit time (PRF) irregularly to avoid exposure to the relative radar alarm receiver, so to solve this, the relative phase of the radar pulse received at the antenna is solved. Estimate the position using the delay difference.

In order to estimate the position by using the phase delay difference of the radar pulse reaching the receiver, the half wavelength of the frequency of interest of the radar pulse should be longer than the distance between the antennas of the two receivers. Otherwise, using the cross-spectral analysis technique, even if the phase difference of the radar pulses reached between the two receiver antennas must be compensated and summed after repeated times, the radar reached between the antennas of the two receivers It is difficult to find the time delay difference of a pulse.

개의 쌍곡선이 존재하게 된다. 결국, 레이더 펄스를 발산한 장치의 위치는 여러 개의 쌍곡선이 교차하는 지점이 된다. 또한, 쌍곡선이 교차하는 지점을 찾기 위해 3차원 공간상의 관심 영역을 정하고, 이 관심영역에 대하여 소프트웨어적으로 스캐닝하여 확률적으로 가능성이 가장 높은 지점을 레이더 펄스 발산 위치로 선정한다.
Therefore, in the present invention, a rectifier circuit is added to convert the ultra-high frequency radar pulse signal of several tens of GHz to low frequency, and the cross-spectrum analysis technique is applied to find the exact phase delay difference between the two receiver antennas. After obtaining the time delay difference by dividing the frequency f by the phase delay difference obtained through cross-spectral analysis, the difference in distance from the two sensors is obtained by multiplying the time delay difference by the radar propagation speed. The line connecting the point where the difference in distance from the two sensors obtained is drawn is hyperbolic, and when there are multiple receiver antennas

Hyperbola exists. As a result, the position of the device that emitted the radar pulse is the point where several hyperbolas intersect. In addition, to find the point where the hyperbola crosses, a region of interest in three-dimensional space is determined, and the region of interest is probable by software scanning to select the most likely point as the radar pulse divergence position.

Hereinafter will be described in detail with reference to the drawings in more detail.

1 is a diagram schematically showing the configuration of an entire system showing a radar pulse source position estimation apparatus according to an embodiment of the present invention.

The receiver 200 receives the high frequency signal of the radar pulse.

The high frequency signal of several tens of GHz radar pulses received through the receiver 200 is amplified by the amplifier 300.

The signal amplified by the amplifying unit 300 filters only the frequency band of interest of a specific band of the radar pulse through the filter unit 400. The filter unit 400 may be a band pass filter (BPF) for passing only a frequency of a specific band or a high pass filter (HPF) for passing only a frequency of a high frequency band.

However, in the present invention, it is preferable that the amplified signal passes through the filter unit 400 to receive only a specific band, but after passing through the filter unit 400, the signal passed through the amplifier 300 may be amplified. have.

A portion of the filtered signal is converted into a low frequency signal through the rectifier 500, and a portion of the filtered signal is transmitted without any processing.

The reason why the signal is not passed through the rectifier 500 is to maintain a unique function such as the PIA identification function of the existing radar alarm receiver.

In addition, the signal changed into a low frequency signal through the rectifier 500 is input to the processing unit 600, the processing unit 600 is a position where the radar pulse is emitted using the signal processing techniques proposed in the present invention the low-frequency signal To estimate the result through the output unit 700.

The output unit 700 indicates a position at which the estimated radar pulse is emitted, and provides visual information to a flight driver through a multi functional display (MFD) or provides an internal communication system (ICS). It provides an audible information to the flight driver to trigger an alarm.

2 is a diagram schematically illustrating a circuit configuration of the rectifier 500 according to an embodiment of the present invention.

As shown in FIG. 2, the circuit of the rectifier 500 includes a rectifier circuit 510 and a smoothing circuit 520, and the filtered signal is converted into a low frequency signal while passing through the rectifying circuit 510 and the smoothing circuit 520. do.

The rectifier circuit 510 is a circuit used to convert an AC signal into a direct current, and it is preferable to use a bridge diode as a full-wave rectification circuit proposed in the present invention, but other full-wave rectification circuits may be applied. . That is, while the positive value of the AC signal is maintained and the negative value is converted to the positive value and output through the rectifier circuit 510, the AC signal is converted into an absolute value.

In addition, the smoothing circuit 520 may be basically configured as a capacitor as shown in FIG. 2, and other smoothing circuits may also be applied. That is, the rectified signal through the smoothing circuit 520 is converted into a smooth signal close to the rectangle.

Hereinafter, a position estimation algorithm performed by the processor 600 shown in FIG. 1 will be described in detail.

, 두 수신부(200) 안테나 사이의 거리를

라면,

를 만족해야 하고, 레이더 전파의 주파수를

, 레이더 전파 속도를

, 레이더 펄스의 한 주기를

라고 한다면 하기의 수학식 1이 만족해야 한다.The maximum time delay difference transmitted to the two receivers 200 in the radar of the aircraft that emits the radar pulse is when the radar and the receiver 200 are in parallel with each other, and the half wavelength of the frequency is between the two receivers 200 antennas. Must be greater than the distance difference. In other words, in other words, the wavelength of the radar pulse frequency

, The distance between the two receiver 200 antenna

Ramen,

And the frequency of the radar wave

Speed radar propagation

One cycle of the radar pulse

Equation 1 below should be satisfied.

As can be seen from Equation 1, the position estimation method using the phase delay difference is dependent on the distance between the receiver 200 and is limited to the frequency domain, so the rectifier 600 should be placed.

By providing the rectifier 600, a low frequency component can be obtained from an ultra-high frequency radar pulse signal, thereby allowing a large distance between the receivers 200 to be obtained. In addition, the distance between the receivers 200 is increased, so that the three-dimensional ROI that can be estimated is also expanded, and the position estimation result is improved.

Hereinafter, a method of obtaining a time delay difference between the receivers 200 using the radar pulse signal received by the receiver 200 will be described in detail.

라 하고, 시간 지연

을 가지고 도달한 신호를

라고 한다면, 두 신호는 하기의 수학식 2와 같이 나타낼 수 있다.Among the two receivers 200, the first radar pulse signal

Time delay

Signal reached with

In this case, the two signals can be expressed as in Equation 2 below.

When the cross correlation function of two signals of Equation 2 is obtained, it can be expressed as Equation 3 below.

는

에서 최대 값을 가지며

가 두 센서 유닛의 도달 시간지연차가 된다. 상호상관함수를 이용하여 두 센서 유닛간 시간지연차를 구하는 경우, 채널 잡음이 많이 섞이게 되면 두 신호의 상관관계가 줄어들게 되어 오차가 커지게 된다.Cross-correlation function

The

Has the maximum value in

Becomes the time delay of arrival of the two sensor units. When the time delay difference between two sensor units is obtained by using the cross-correlation function, when the channel noise is mixed a lot, the correlation between the two signals is reduced and the error becomes large.

Therefore, the present invention includes a method for obtaining a time delay difference of radar pulses arriving at two sensor units using a cross-spectrum analysis technique that is less affected by noise as well as a cross-correlation function technique. When Fourier Transform (4) described above is obtained and the cross-spectrum function is obtained, the following Equation 4 can be expressed.

The cross-spectrum function shown in Equation 4 is transformed from the time domain to the frequency domain, and the magnitude of the cross-spectrum function is represented by the product of two signal amplitudes and the phase is represented by the phase difference between the two signal frequencies.

In addition, the multiplication of the two signals leaves only the frequency components common to both signals, and the frequency components existing in only one signal are attenuated, leaving only the frequency components of the radar pulses passed through the rectifier circuit. do.

와 주파수

사이에는

인 관계가 있으므로, 두 신호 사이의 위상 차를 이용하여 시간 지연을 구하기 위해서는 주기에 위상 지연비를 곱해야 한다. 즉, 시간 지연을

라고 하면, 시간 지연은 하기 수학식 5처럼 나타낼 수 있다.Next, after applying the cross spectral analysis technique, it is necessary to divide by frequency to find the time delay difference from the phase delay difference. In the method of determining a specific frequency, the radar pulse signal passing the rectifier is close to a rectangle, and the Fourier transform result of the rectangular signal is represented by a sink function, so the frequency component except the DC component (f = 0) is excluded. The highest value in the low frequency range is taken. Cycle

And frequency

In between

Since there is a relation, the period must be multiplied by the phase delay ratio to obtain a time delay using the phase difference between the two signals. In other words, time delay

In this case, the time delay may be represented by Equation 5 below.

라 하고, 두 수신부 안테나 사이의 도달 거리 지연 차를

라고 한다면, 안테나 사이의 도달 거리 지연 차는 하기의 수학식 6에서처럼 나타낼 수 있다.In Equation 5, the distance delay difference between the radar pulses reaching the two receiver antennas may be obtained by multiplying the propagation speeds of the radar pulses. That is, the radar pulse propagation speed

And the difference in the reach delay between the two receiver antennas

In this case, the difference in reach delay between antennas may be expressed as in Equation 6 below.

That is, when the distance difference from the antennas of the two receivers 200 follows a predetermined point, a hyperbola is drawn. When several receivers 200 are connected, the point where the hyperbolas meet is the position where the radar pulses are emitted.

As described above, in the present invention, as a method for obtaining a time delay difference between the radar pulse signals received by the receiver 200, the difference between the times at which the amplitude value of the threshold value or more is determined and the threshold value is determined or mutually reached Methods such as using correlation analysis techniques may be applied.

In addition, in the present invention, in order to find a point where several hyperbolas meet, scanning is performed on a region of interest to find a point that is probabilistically maximum, and FIG. 4A illustrates a position where the radar pulse is emitted according to an embodiment of the present invention. A scanning technique for finding a is shown. It will be described in detail below.

If the number of receivers 200 is assumed to be N, the number M of hyperbolas generated by the receiver 200 is expressed by Equation 7 below.

와

의 차에서 실제 두 수신부 사이에 측정된 거리 지연 차인

를 뺀 최소의 지점이 레이더 펄스가 발산된 위치가 된다. 즉, 이를 수식으로 나타내면 하기의 수학식 8과 같이 나타낼 수 있다.The position where the radar pulse is emitted is a distance from each scanning position to each of the receivers 200 as shown in FIG. 4A.

Wow

Is the distance delay difference measured between the actual two receivers in

The minimum point minus is the location where the radar pulse is emitted. In other words, this may be represented by Equation 8 below.

The point of Equation 8 is the position where the radar pulse is generated, and when the receiver antenna is N, the point shown in Equation 9 below is the position where the radar pulse is emitted.

According to the above-described process, FIG. 4B is a diagram illustrating a result of scanning several time delays with respect to two receivers 200, and FIG. 4C shows some time delays with respect to three receivers 200. It is a figure which shows the result of scanning about a difference.

In FIG. 4B, the distance between the two receivers 200 is set to 20 m in consideration of the wing width of the aircraft, and the scanning interest range is up to 300 km. FIG. 4C also shows the results of estimating the position of the three receivers 200 in some cases when the receiver 200 is formed with an equilateral triangle structure in order to form an actual aircraft. will be.

In addition, FIG. 5 illustrates a coordinate setting method for software scanning on a 3D area. In the scanning method, a sample pointer is minimized over the widest area in consideration of time. It is then preferable to use a method of gradually narrowing the region of interest.

6 and 7, the radar pulse source position estimation method of the present invention will be described. FIG. 6 is a view showing the radar pulse source position estimation method according to an embodiment of the present invention, Figure 7 is an embodiment of the present invention According to an example, a diagram illustrating a step of converting to a low frequency.

According to the present invention, in the method of estimating the location of a radar pulse generator, the radar pulse signal emitted from the radar is received through the antenna as described above (S100), and the received radar pulse signal is converted into a low frequency using a rectifier circuit (S200). ), A method of estimating the position of the radar pulse source using the radar pulse signal converted into a low frequency (S300).

That is, the radar pulse signal received in the process of changing the low-frequency signal, characterized in that for estimating the position of the radar pulse by the signal changed to the low frequency through the rectifying circuit and the smoothing circuit. Amplifies (S210), and also passes a filter to pass only a frequency of a specific band for the amplified radar pulse signal (S220), and the radar pulse signal passing through the filter is converted into a low frequency through a rectifying circuit and a smoothing circuit. It is preferable that the step (S230) is made.

However, in the present invention, as described above, the method of filtering the amplified signal to pass only a frequency of a specific band (S210, S220) is preferable in terms of noise, but after filtering first, the method of amplifying the filtered signal is applied. You may.

In addition, the method for estimating the position of the radar pulse generation source using the radar pulse signal converted into a low frequency using the time difference of arrival time delay of the radar pulse signal reaching two or more antennas, estimating the position where the radar pulse signal is emitted In order to determine the arrival time delay difference of the radar pulse signal, it is preferable to first obtain a phase delay difference by a cross-spectral function, and then obtain a time delay difference by dividing the phase delay difference by a frequency.

In this case, as a method for obtaining a time delay difference of the received radar pulse signal as described above, a method such as calculating a difference in time at which an amplitude value equal to or greater than a predetermined threshold value is determined and other threshold values are reached may be applied. Of course.

The line connecting the point where the difference in the arrival distance delay of the radar pulse signal reaching the two antennas by multiplying the time delay difference obtained above by the propagation speed is generated from three or more antennas using the hyperbolic characteristic. The intersection of two or more hyperbolic curves is estimated as the radar pulse divergence position.

In addition, the present invention proposes a method of using the above-described scanning technique for a predetermined point to find the intersection of the hyperbola which is the position where the radar pulse is emitted.

Although the present invention has been described by specific embodiments such as specific components and the like, but the embodiments and the drawings are provided to assist in a more general understanding of the present invention, the present invention is not limited to the above embodiments. For those skilled in the art, various modifications and variations can be made from these descriptions.

Therefore, the matters of the present invention should not be limited to the embodiments described above, and all of the equivalents or equivalents of the claims, as well as the claims described below, fall within the scope of the spirit of the present invention. I will say.

100: radar pulse source position estimation device
200: receiver 300: amplifier
400 filter unit 500 rectification unit
510: rectifier circuit 520: smoothing circuit
600: processing unit 700: output unit
800: input unit
S100: Receiving Radar Pulse
S200: converting into low frequency using rectifier circuit
S300: estimating the position of the radar pulse generation source
S210: amplifying the received radar pulse signal
S220: passing only the frequency of a specific band
S230: converting to low frequency through rectification circuit

Claims (15)

An apparatus for estimating a position for generating an irregular high frequency radar pulse signal,
A receiver for receiving the radar pulse signal through an antenna;
A rectifier for converting the radar pulse signal received through the receiver into a low frequency signal; And
A processor configured to estimate a position of a radar pulse generator using the low frequency signal converted by the rectifier;
Including,
The processor may estimate a position of the radar pulse generation source by using a difference in arrival time delay of the radar pulse signal received by at least two receivers.
And a cross spectral function in a frequency domain is used to obtain a difference in arrival time delay of the irregular radar pulse signal.
The method of claim 1,
An amplifier for amplifying the radar pulse signal received through the receiver; And
A filter unit configured to pass only a frequency of a specific band to the radar pulse signal amplified by the amplifier;
Further comprising:
And the rectifier converts the radar pulse signal filtered through the filter into a low frequency signal.
3. The method according to claim 1 or 2,
An output unit for informing the position estimation result of the radar pulse generation source in the processing unit;
Radar pulse source position estimation device further comprises.
delete delete delete The method of claim 1,
The processing unit may be configured to form a hyperbolic curve that connects a point where the arrival time delay difference multiplied by the movement speed of the radio wave multiplied by the arrival time delay difference of the radar pulse signals reaching the two reception units, from the three or more receivers. An apparatus for estimating the position of a radar pulse source, comprising estimating a generated intersection point of two or more hyperbolas as a radar pulse divergence position.
The method of claim 7, wherein
And the processing unit uses a scanning technique for a randomly determined point to obtain an intersection point of the hyperbola.
In the method for estimating the position of generating an irregular high frequency radar pulse signal,
(a) receiving the radar pulse signal via an antenna;
(b) converting the received radar pulse signal to a low frequency using a rectifier circuit; And
(c) estimating a position of a radar pulse generation source using the radar pulse signal converted to a low frequency;
Including,
In step (c), the position of the radar pulse generating source is estimated using the difference in arrival delay of the radar pulse signal reaching at least two antennas,
A method for estimating the position of a radar pulse source using a cross spectral function in a frequency domain when calculating a difference in arrival time delay of the irregular radar pulse signal.
The method of claim 9,
The step (b)
(b1) amplifying the received radar pulse signal;
(b2) allowing the amplified radar pulse signal to pass only a frequency of a specific band; And
(b3) converting the radar pulse signal having the passed frequency into a low frequency through a rectifying circuit;
Radar pulse source position estimation method comprising a.
delete delete delete The method of claim 9,
The step (c)
The line that connects the point of arrival distance delay difference multiplied by the speed of propagation of the radar pulse signal reaching the two antennas is a hyperbolic curve. A method for estimating the position of a radar pulse source, characterized by estimating an intersection point as a radar pulse divergence position.
15. The method of claim 14,
The step (c)
A method for estimating the position of a radar pulse source using a scanning technique for a predetermined point to find an intersection point of the hyperbola.

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