KR101764029B1 - Target detection apparatus and method for using elimination function of parasitic signal - Google Patents

Target detection apparatus and method for using elimination function of parasitic signal Download PDF

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KR101764029B1
KR101764029B1 KR1020150188613A KR20150188613A KR101764029B1 KR 101764029 B1 KR101764029 B1 KR 101764029B1 KR 1020150188613 A KR1020150188613 A KR 1020150188613A KR 20150188613 A KR20150188613 A KR 20150188613A KR 101764029 B1 KR101764029 B1 KR 101764029B1
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signal
target
parasitic
level
received
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KR1020150188613A
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Korean (ko)
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KR20170078266A (en
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김수경
양현배
김재호
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한국공항공사
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S13/34—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
    • G01S13/343—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal using sawtooth modulation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/42—Simultaneous measurement of distance and other co-ordinates
    • G01S13/44—Monopulse radar, i.e. simultaneous lobing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/91—Radar or analogous systems specially adapted for specific applications for traffic control
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/91—Radar or analogous systems specially adapted for specific applications for traffic control
    • G01S2013/916—Airport surface monitoring [ASDE]

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

An apparatus and method for detecting a target using a parasitic signal cancellation function are disclosed. An apparatus for detecting a target using a parasitic signal cancellation function includes an interface for receiving a reception signal including an organic signal having a part of the signal and a target signal received from the target object when a signal is transmitted to the target object, Adjusting the level of the signal by a predetermined unit size and if the parasitic signal generated from the organic signal in the received signal after the adjustment of the level is detected to exceed the predetermined threshold value, And a control unit for displaying a target signal in the received signal on the display when the parasitic signal is detected to be equal to or less than the threshold value.

Description

TECHNICAL FIELD [0001] The present invention relates to a target detection apparatus and method using a parasitic signal cancellation function,

The embodiments of the present invention improve the detection performance of the target object by suppressing the parasitic signal generated from the induced organic signal and providing false information about the target object as a part of the signal transmitted to the target object is induced. .

The ASDE (Airport Surface Detection Equipment) system transmits a signal to the target object, and can detect the target object by using the received signal reflected from the target object.

In the ASDE system, a SAW (Surface Acoustic Wave) filter is mainly used to remove adjacent channel interference to the receiver. At this time, when the transmitted signal is induced in the receiver, a parasitic signal delayed by the time delay characteristic is generated. When the parasitic signal occurs after the time corresponding to the radar minimum detection distance, it corresponds to the signal processing period (the received video processing period in which the valid signal is received), and when the signal is displayed on the display, A false target) is expressed, which can interfere with detection of the target object.

The present invention is characterized in that when a part of a signal transmitted to a target object is received and a received signal including an organic signal and an object signal received from the target object is received, The object of the present invention is to suppress false information about a target object caused by the parasitic signal by suppressing a parasitic signal generated from an organic signal in a received signal, thereby improving detection performance for a target object.

It is another object of the present invention to adjust the level of a received signal stepwise downward to enable the parasitic signal to be suppressed to the maximum within a range in which the target object can be detected through the target signal in the received signal.

A target detection apparatus using a parasitic signal cancellation function for receiving the above-mentioned object receives a reception signal including a target signal received from the target object and an organic signal including a part of the signal when the signal is transmitted to the target object And a control unit for adjusting the level of the received signal by a predetermined unit size and, after the adjustment of the level, if a parasitic signal generated from the organic signal in the received signal exceeds a predetermined threshold value, And a control unit for displaying the target signal in the received signal on the display when the parasitic signal is detected to be equal to or less than the threshold value.

In order to achieve the above object, a target detection method using a parasitic signal cancellation function includes receiving a reception signal including an organic signal having a part of the signal and a target signal received from the target object, A level adjusting step of adjusting a level of the received signal by a predetermined unit size; and a level adjusting step of adjusting a level of the received signal by adjusting a level of the parasitic signal generated from the organic signal in the received signal, Repeating the level adjustment step if the detected parasitic signal is less than the threshold value; and displaying the target signal in the received signal on the display when the parasitic signal is detected to be less than the threshold value.

According to an embodiment of the present invention, when a part of a signal transmitted to a target object is induced and a received signal including an organic signal and an object signal received from the target object is received, the level of the received signal is decreased The false information on the target object due to the parasitic signal is removed by suppressing the parasitic signal generated from the organic signal in the adjusted received signal so that the detection performance for the target object can be improved.

Further, according to the embodiment of the present invention, the level of the received signal is adjusted downward step by step, so that the parasitic signal can be suppressed to the maximum within a range in which the target object can be detected through the target signal in the received signal.

1 is a diagram illustrating an example of a configuration of a target detection apparatus using a parasitic signal cancellation function according to an embodiment of the present invention.
2 is a block diagram illustrating a configuration of a target detection apparatus using a parasitic signal cancellation function according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating a waveform of a signal measured by a target detection apparatus using a parasitic signal cancellation function according to an exemplary embodiment of the present invention. FIG. 4 is a view illustrating a display screen of the signal of FIG.
5 is a diagram illustrating a configuration of a signal processing unit for an STC control operation in a target detection apparatus using a parasitic signal cancellation function according to an embodiment of the present invention.
6 is a diagram illustrating a signal change according to an STC control operation for removing a parasitic signal in a target detection apparatus using a parasitic signal cancellation function according to an embodiment of the present invention.
7 is a flowchart illustrating a method of detecting a target using a parasitic signal cancellation function according to an embodiment of the present invention.

Hereinafter, an apparatus and method for detecting a target using a parasitic signal cancellation function according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention can be applied to an ASDE (Airport Surface Detection Equipment) system, but is not limited thereto.

1 is a diagram illustrating an example of a configuration of a target detection apparatus using a parasitic signal cancellation function according to an embodiment of the present invention.

Referring to FIG. 1, a target detection apparatus 100 using a parasitic signal cancellation function according to an embodiment of the present invention includes a signal generation unit 101, an interface unit 103, a conversion unit 105, and a control unit 107, . ≪ / RTI >

The signal generating unit 101 may generate a signal (e.g., a laser signal) and transmit it to the interface unit 103.

The interface unit 103 can transmit the generated signal to the target object by the signal generating unit 101. [

The interface unit 103 may receive a reception signal including a target signal received from the target object and an organic signal in which a part of the signal is transmitted when the signal is transmitted to the target object.

The converting unit 105 can adjust the level of the received signal by decreasing the level by a predetermined unit size. After the level adjustment, the conversion unit 105 may sense a parasitic signal generated from the organic signal in the received signal. Here, the parasitic signal may be generated by delaying a set time from the time when the organic signal is induced, and the generation time may be included in the signal processing period (or the received video processing period). In this case, the signal processing period is a period in which a valid signal is received, and may mean a time for receiving a target signal reflected from the target object after transmitting the signal.

If the parasitic signal is detected to be less than the threshold value (e.g., noise level), the converting unit 105 repeats the level adjusting step. If the parasitic signal is detected to be less than the threshold value, The repetition of the level adjustment step can be stopped. At this time, the converting unit 105 can finely adjust the received signal by decreasing the unit size to be adjusted by the lowering as the level adjusting step is repeated. For example, the converting unit 105 may set the unit size differently as the level adjusting step is repeated, and may reduce the size by '50 dB' in the first level adjustment and decrease by '20 dB' in the second level adjustment. When adjusting the level, you can reduce it by '10dB' size.

On the other hand, if the target signal in the received signal is less than or equal to the threshold value, the converting unit 105 may stop repeating the level adjusting step regardless of whether the parasitic signal is over detected.

In another embodiment, the conversion unit 105 determines the optimum level of the received signal in the detection target range direction in which the target object is located using STC (Sensitivity Time Control), and determines the optimal level The adjustment of the level can be repeated.

STC can be generally referred to as lowering the receiver sensitivity for a certain period of time after the pulse firing to suppress near-surface reflection in the radar. The conversion unit 105 can improve the target detection performance by effectively suppressing the parasitic pulse signal generated due to the organic signal of the transmission waveform by setting an appropriate reception sensitivity in the detection target range direction by utilizing the STC.

In other words, the converting unit 1050 determines the most ideal level for detecting the target object through the STC, and in a sequential drop adjustment process to the determined corresponding level, the parasitic signal is no longer displayed on the display below the threshold .

When the parasitic signal is detected to be equal to or lower than the threshold value, the control unit 107 can display the target signal in the received signal on the display. At this time, the control unit 107 removes the organic signal induced at a time other than the signal processing period from the received signal, and selects the target signal received at the time point within the signal processing period, Can be extracted and displayed on the display. Herein, the generation time of the parasitic signal is included in the signal processing section, but the parasitic signal can be excluded from the object to be displayed on the display as it is attenuated below the threshold value.

Therefore, the control unit 107 allows the target object to be recognized more accurately by displaying only the target signal effective for detecting the target object and restricting the display of the parasitic signal which is not effective for the target object detection.

2 is a block diagram illustrating a configuration of a target detection apparatus using a parasitic signal cancellation function according to an embodiment of the present invention.

2, the target detection apparatus 200 using the parasitic signal cancellation function may include a signal processing unit 201, an up / down conversion unit 203, an amplification unit 215, and an antenna unit 219.

The signal processing unit 201 can generate a transmission signal (e.g., a short or a long transmission pulse).

The up-and-down conversion unit 203 can perform frequency conversion on the generated transmission signal through the up-conversion unit 205.

The amplification unit 215 may be composed of, for example, four SSPA (Solid State Power Amplifier), and amplify the transmission signal whose frequency is converted to a high output (for example, 200 W).

The antenna unit 219 can radiate the amplified transmission signal to the target object.

Also, the antenna unit 219 can receive the target signal reflected by the target object within the detection range of the emitted transmission signal.

The up-and-down conversion unit 203 can adjust the received signal through the down-conversion unit 207. Here, since the reception signal has the same transmission / reception frequency, a part of the transmission signal is generated at the transmission time, and the organic signal input through the circulator 215 and the target signal received by the antenna unit 219 And can receive it as the received signal.

Here, the down-conversion unit 207 operates three sensitivity suppression attenuators for STC (Sensitivity Time Control) control (time-sensitive reception sensitivity control) on the received signal, thereby generating a parasitic signal generated from the organic signal in the received signal It can be adjusted below the set level. At this time, the down-conversion unit 207 includes three sensitivity suppression attenuators, which are a limiter 209, a first variable attenuator (VGA) 1 (211-1) and a second attenuator (VGA2) 211-2.

Here, the limiter 209 can down-convert the frequency of the received signal, and can perform an internal 50 dB attenuator operation, for example, to limit the organic signal inputted and induced from the transmitted signal. In addition, the first attenuator 211-1 and the second attenuator 211-2 can perform the reception sensitivity adjustment function of, for example, 20 dB, respectively.

As a result, the down-conversion unit 207 can down-adjust the reception sensitivity of 90 dB total through the limiter, the first attenuator and the second attenuator.

The parasitic signal (parasitic pulse) can be generated due to the delay characteristic of the SAW filter 213 while the organic signal in the reception signal output from the second attenuator passes through the SAW (Surface Acoustic Wave) filter 213 have. That is, the SAW filter 213 can output a parasitic signal (parasitic pulse) generated from the organic signal after an interval of delay time in addition to the inputted organic signal (Short Pulse, 75 ns). Here, as the organic signal is adjusted downward through the sensitivity suppression attenuator, the adjusted organic signal and the parasitic signal generated therefrom are converted into a conventional organic signal which does not adjust the reception sensitivity, as shown in FIG. 3 (b) (For example, a noise level), unlike the parasitic signal (FIG. 3 (a)).

Therefore, as the parasitic signal generated from the adjusted organic signal is lowered to the set level or less, as shown in FIG. 4 (b), when the signal is displayed on the display, (False Target) is not displayed, unlike the case where the target (false target) is displayed in a circular shape (i.e., a ring) (Fig.

5 is a diagram illustrating a configuration of a signal processing unit for an STC control operation in a target detection apparatus using a parasitic signal cancellation function according to an embodiment of the present invention.

5, the signal processing unit 500 may include an external signal connection block 501, a control signal generation block 503, and an STC control block 505.

The external signal connection block 501 receives an ACP (Azimuth Change Pulse) and an ARP (Azimuth Reference Pulses) trigger signal of the antenna and generates a physical or logical interface for the control and status signals based on the received signal .

The control signal generation block 503 synchronizes with the reference trigger signal and generates a control signal such as a burst (12 frame) trigger, a frame trigger, a short pulse trigger, a long pulse trigger signal Lt; / RTI > Each trigger signal can be flexibly varied through delay adjustment. Here, a reference time for controlling the trigger delay of the STC based on the frame trigger (trigger indicating the start of the detection pulse) can be provided.

The STC control block 505 controls the adjustment voltage of the three adjustment blocks VGA1 and VGA2 through a digital analogue converter (DAC) to adjust the sensitivity of the reception signal input to the down- Can be controlled over time.

The STC control block 505 controls the reception gain for the sensing signal attenuated in inverse proportion to the fourth square of the distance in the detection distance range to a ROM table . At this time, the STC control block 505 further adjusts the degree of attenuation in the period in which the parasitic signal flows, so that the parasitic signal can be adjusted without loss of the target detection object in the section. In addition, the STC control block 505 generates four types of STC profiles in one cycle (PRI) (a transmission interval between the transmission signal and the next transmission signal) and stores the STC profile in the ROM table. Thus, The optimum STC profile can be applied to suit the situation.

6 is a diagram illustrating a signal change according to an STC control operation for removing a parasitic signal in a target detection apparatus using a parasitic signal cancellation function according to an embodiment of the present invention.

Referring to FIG. 6, when a transmission signal (short transmission pulse) transmitted to a target object is transmitted to a receiving end through a circulator, an attenuator (a limiter for STC control, a first attenuator VGA 1, The attenuator VGA2 may operate to adjust the induced signal. The adjusted organic signal may be applied to the signal processing unit after the SAW filter signal delay. At this time, through the STC control, , The parasitic signal (parasitic pulse) generated from the induced signal is attenuated to the set noise level or less, and when the signal is displayed on the display, a prototype representing the false target is not displayed .

On the other hand, as the target signal received from the target object exceeds the noise level, it is displayed on the display in the display on the display for the signal so that the target object can be grasped.

7 is a flowchart illustrating a method of detecting a target using a parasitic signal cancellation function according to an embodiment of the present invention.

Referring to FIG. 7, in step 701, when a signal is transmitted to a target object, the target detection apparatus receives a reception signal including a target signal received from the target object and an organic signal, .

In step 703, the target detection apparatus can adjust the level of the received signal by a predetermined unit size.

In step 705, after the level adjustment, the target detection apparatus senses a parasitic signal generated from the organic signal in the received signal and confirms whether the sensed parasitic signal exceeds a predetermined threshold value. Here, the parasitic signal may be generated by a delay time set by a predetermined time from the time when the organic signal is induced.

If it is determined that the parasitic signal exceeds the threshold value, the target detection apparatus may move to step 703 and repeat the level adjustment. At this time, the target detection apparatus can lower the unit size to be adjusted by decreasing the level adjustment step as the level adjustment step is repeated.

On the other hand, if the target signal in the received signal is less than or equal to the threshold value, the target detection apparatus may stop repeating the level adjustment step regardless of whether the parasitic signal is over detected.

If it is determined that the parasitic signal is below the threshold value, the target detection apparatus may display the target signal in the received signal on the display in step 707. [ At this time, the target detection apparatus removes the organic signal induced at a time other than the signal processing section from the received signal, and selects the target signal received at the time point in the signal processing section to output a signal valid for target object detection Can be extracted and displayed on the display.

In an embodiment of the present invention, when a part of a signal transmitted to a target object is received and a received signal including an organic signal and an object signal received from the target object is received, the level of the received signal is adjusted to be lowered By suppressing the parasitic signal generated from the organic signal in the adjusted received signal, the false information on the target object due to the parasitic signal can be removed, thereby improving the detection performance for the target object.

Further, the embodiment of the present invention adjusts the level of the received signal stepwise downward to enable the parasitic signal to be suppressed as much as possible within a range in which the target object can be detected through the target signal in the received signal.

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

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

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

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

100: Target detection device using parasitic signal cancellation function
101: Signal Generation Unit 103: Interface Unit
105: conversion unit 107: control unit

Claims (11)

An interface unit for receiving a reception signal including an organic signal in which a part of the signal is transmitted and a target signal received from the target object when a signal is transmitted to the target object;
When a parasitic signal generated from an organic signal in the received signal is detected to exceed a predetermined threshold value after adjustment of the level by adjusting a level related to the magnitude of the received signal by a predetermined unit size, A conversion unit for repeating the adjustment of the first and second signals; And
When the parasitic signal is detected to be equal to or lower than the threshold value,
Lt; / RTI >
Wherein,
When the target signal in the received signal becomes less than or equal to the threshold value, the adjustment loop of the level is stopped irrespective of whether the parasitic signal is over detected
Target detection apparatus using parasitic signal cancellation function. delete The method according to claim 1,
Wherein,
As the adjustment of the level is repeated, the lowering unit adjusts the unit size to be adjusted
Target detection apparatus using parasitic signal cancellation function. The method according to claim 1,
Wherein,
And detects the parasitic signal generated by delaying a predetermined time from the time when the organic signal is induced
Target detection apparatus using parasitic signal cancellation function. The method according to claim 1,
Wherein,
The organic signal removed from the received signal at a time other than the signal processing period is removed and the target signal received at the time point in the signal processing period is selected
Target detection apparatus using parasitic signal cancellation function. The method according to claim 1,
Wherein,
Determining a level of the received signal in the detection target range direction in which the target object is located, the level being a specific level for detecting the target object, using STC (Sensitivity Time Control) The adjustment of the level is repeated
Target detection apparatus using parasitic signal cancellation function. The method comprising: receiving a received signal including an organic signal having a part of the signal and a target signal received from the target object when the signal is transmitted to the target object;
A level adjusting step of adjusting a level related to the magnitude of the received signal by a predetermined unit size;
Repeating the level adjusting step if the parasitic signal generated from the organic signal in the received signal after the adjustment of the level is detected to exceed a predetermined threshold value;
Stopping the repetition of the level adjustment step regardless of whether the target signal in the received signal is less than or equal to the threshold value, regardless of whether the parasitic signal is over detected; And
Displaying the target signal in the received signal on a display when the parasitic signal is detected to be below the threshold value,
A target detection method using a parasitic signal cancellation function. delete 8. The method of claim 7,
The step of repeating the level adjusting step may include:
A step of lowering and adjusting the unit size to be adjusted so that the level adjustment step is repeated
A target detection method using a parasitic signal cancellation function. 8. The method of claim 7,
The step of repeating the level adjusting step may include:
Detecting the parasitic signal generated by delaying the organic signal by a set time from the time when the organic signal is induced
A target detection method using a parasitic signal cancellation function. 8. The method of claim 7,
The step of exposing a target signal in the received signal on a display includes:
Removing the organic signal induced at a time point other than the signal processing period from the received signal and selecting the target signal received at a time point within the signal processing period
A target detection method using a parasitic signal cancellation function.
KR1020150188613A 2015-12-29 2015-12-29 Target detection apparatus and method for using elimination function of parasitic signal KR101764029B1 (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2544892Y2 (en) * 1991-05-30 1997-08-20 アイコム株式会社 Radar equipment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2544892Y2 (en) * 1991-05-30 1997-08-20 アイコム株式会社 Radar equipment

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