KR20170063148A - System for analyzing location estimating performance and method thereof - Google Patents

System for analyzing location estimating performance and method thereof Download PDF

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Publication number
KR20170063148A
KR20170063148A KR1020150169183A KR20150169183A KR20170063148A KR 20170063148 A KR20170063148 A KR 20170063148A KR 1020150169183 A KR1020150169183 A KR 1020150169183A KR 20150169183 A KR20150169183 A KR 20150169183A KR 20170063148 A KR20170063148 A KR 20170063148A
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South Korea
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virtual
signal
threat
location
unit
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KR1020150169183A
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Korean (ko)
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신동조
이정훈
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국방과학연구소
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Publication of KR20170063148A publication Critical patent/KR20170063148A/en

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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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/40—Means for monitoring or calibrating
    • 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
    • G01S13/66—Radar-tracking systems; Analogous systems
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B9/00—Simulators for teaching or training purposes
    • G09B9/54—Simulation of radar

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Theoretical Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

The position estimation performance analyzing system according to an embodiment of the present invention includes a scenario executing unit for executing a scenario in which a virtual aircraft rotates a circular orbit around a position of a virtual threat, A location estimating unit for estimating a location of the virtual threat based on direction detection information related to the location of the virtual threat, and an estimated location of the virtual threat and the estimated location of the virtual threat, And a position estimation performance analyzer for detecting information related to a position estimation performance by the estimation unit.

Description

Field of the Invention < RTI ID = 0.0 > [0001] < / RTI &

The present invention relates to a system and method for analyzing a position estimation performance, and more particularly, to a system and method for providing performance analysis of a signal source position estimation algorithm using an incoming azimuth.

Recently, Electronic Support (ES) equipment not only detects the directions related to enemy threats, but also supports estimation of information related to enemy positions, and studies for reducing the error rate of such location estimation are continued have.

Moreover, in order to apply the above-described direction detection technique and position estimation technique to real equipment, it is required to accurately verify its performance in advance. As a conventional method for verifying the performance of the position estimation, a flight path of an aircraft is defined by using a simulation without injecting a radio frequency (RF) signal. By analyzing the measurement time interval and the arrival angle error And a method of verifying the position estimation performance.

However, there is a problem in that verification can be performed only on the position estimation algorithm to be applied to the position estimation technique. That is, the verification from the step of receiving the RF signal to the step of performing the position estimation algorithm prior to the step of receiving the RF signal can not be performed in a very limited manner.

As a method for solving the above-described problem, there is a method of verifying the position estimation performance by operating an actual aircraft. However, the method of actually operating the aircraft at each verification as described above requires a large amount of cost and resources for verification have.

Therefore, there is a need for a performance verification method which can be easily performed in a laboratory, can be economically implemented, and can integrally verify all the steps of the position estimation technique.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a position estimation performance analysis system and method that can be economically implemented in a laboratory and can integrally verify all stages from an RF stage to a position estimation algorithm .

According to an aspect of the present invention, there is provided a system for analyzing a position estimation performance, the system comprising: a scenario execution unit that executes a scenario in which a virtual aircraft rotates a circular orbit around a position of a virtual threat; A position estimating unit for estimating a position of the virtual threat based on direction detection information related to the position of the virtual threat collected in the process of executing the virtual threat and comparing the estimated position of the virtual threat with the estimated position of the virtual threat, And a position estimation performance analysis unit for detecting information related to the position estimation performance by the position estimation unit based on the comparison result.

In one embodiment, a signal transmitting unit for generating a simulated signal related to a signal generated from a position of the virtual threat and transmitting the generated simulated signal at a preset angle, and for simulating an electronic information receiver of the virtual aircraft, A signal receiving unit for receiving a simulated signal transmitted through a signal transmitting unit and a direction detecting unit for detecting information related to a direction of the simulated signal received through the signal receiving unit and providing the detected direction detecting information to the position estimating unit, And further comprising:

In one embodiment, the radio wave absorber further includes a radio wave absorber positioned in front of the signal receiver and absorbing at least one of reflected waves and scattered waves.

In one embodiment, the signal transmitting unit transmits the simulated signal to the signal receiving unit at 90 degrees.

In one embodiment, the scenario executing section executes a scenario in which the virtual aircraft is configured to rotate the circular orbit in a clockwise or counterclockwise direction.

In one embodiment, the scenario executing section re-executes the scenario in which at least one of the distance between the virtual aircraft and the position of the virtual threat and the rotational speed of the virtual aircraft is changed.

In one embodiment, the position estimating unit estimates the position of the virtual threat in consideration of at least one of position information and speed information of the virtual aircraft.

In one embodiment, the position estimating unit updates the estimated position of the virtual threat by reflecting the direction detection information accumulated according to the rotation of the virtual aircraft, and the position estimation performance analyzing unit estimates the position of the virtual threat, And calculating a time point at which an error between the position of the virtual threat and a position of the virtual threat reaches a predetermined reference value.

According to another aspect of the present invention, there is provided a control method of a position estimation performance analysis system, comprising: (a) executing a scenario in which a virtual aircraft is configured to rotate a circular orbit around a position of a virtual threat; (b) Estimating a position of the virtual threat based on direction detection information related to the position of the virtual threat collected in the rotating process; and (c) comparing the position of the virtual threat with the estimated position of the virtual threat, And analyzing the position estimation performance based on the comparison result.

In one embodiment, the method includes generating a simulation signal related to a signal generated from a position of the virtual threat, transmitting the generated simulation signal at a predetermined angle in a signal transmission unit, Receiving information at a virtual aircraft, detecting information related to a direction of the received simulated signal, and generating direction detection information based on the detection result.

As described above, according to the present invention, since it is possible to easily perform the position estimation performance verification in the laboratory, time and cost can be drastically reduced.

In addition, according to the present invention, it is possible to carry out integrated verification at all stages from the RF stage to the position estimation algorithm by linking with the simulator that performs verification of the RF stage.

1 is a block diagram of a position estimation performance analysis system according to an embodiment of the present invention;
FIG. 2 is an example of a scenario executed for analyzing the position estimation performance through the system of FIG. 1; FIG. And
3 is a flowchart illustrating a process of performing position estimation verification through the system of FIG.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

1 is a block diagram of a position estimation performance analysis system according to an embodiment of the present invention. Referring to FIG. 1, a position estimation performance analysis system 1 according to an embodiment of the present invention includes a signal transmission unit 10, a signal reception unit 20, a direction detection unit 30, a scenario execution unit 40, (50), and a position estimation performance analysis unit (60).

The signal transmitter 10 generates a simulated signal simulating a radio frequency (RF) signal generated from a virtual threat T in the simulation, and transmits the generated simulated signal at a predetermined angle. The signal transmitter 10 may include a plurality of antennas to generate signals according to a plurality of bands, and transmission of the signals may be performed periodically or non-periodically.

The signal transmitting unit 10 includes a console assembly for generating a simulated signal, an antenna assembly including a plurality of antennas for transmitting a generated simulated signal, an apparatus for analyzing a simulated signal to feed back information about a simulated signal, A network analyzer, a spectrum analyzer, an oscilloscope, a processor for vector signal analysis, and the like.

The signal receiving unit 20 receives a simulated signal transmitted through the signal transmitting unit 10 as a simulation for an electronic information receiver of the virtual aircraft P in a simulation. Like the electronic information receiver of an actual aircraft, the signal receiving unit 20 may include an antenna device for receiving the simulated signal generated by the signal transmitting unit 10 and a signal processing circuit for digital signal processing.

At this time, an electromagnetic wave absorber (not shown) may be additionally disposed in front of the signal receiving unit 20 so as to absorb surrounding interference waves, for example, scattered waves or reflected waves so that only a simulated signal transmitted from the signal transmitting unit 10 There will be.

The direction detecting unit 30 performs direction detection on the simulated signal received through the signal receiving unit 20 to estimate an incoming angle of arrival (AOA) of the simulated signal. Direction detection can be performed using various direction detection algorithms based on the phase comparison method, the amplitude comparison method, the amplitude-phase complex comparison method, and the like. Since the signal transmitting unit 10 transmits an RF signal at a predetermined angle, the result of performing the direction detection by the direction detecting unit 30 indicates a certain incoming azimuth angle within an RMS (root mean square) error range according to the direction detecting algorithm As shown in Fig.

For example, when the signal transmitting unit 10 transmits a simulated signal at 90 degrees to the signal receiving unit 20, the incoming azimuth angle will be calculated within an RMS error range centered at 90 degrees.

The scenario executing section 40 executes a scenario that satisfies the condition that the same incoming azimuth is obtained according to the above-described flight path.

2 is a diagram showing an example of a scenario.

Referring to FIG. 2, the scenario executing unit 40 executes a scenario in which the virtual aircraft P is configured to rotate a circular orbit around the position of the virtual threat T. FIG. According to such a scenario, when the direction detection is performed based on the simulation signal transmitted from the virtual threat T, the incoming azimuth angle of 90 degrees is maintained within the RMS error range at any point, so that the signal transmission unit 10 and the signal reception unit 20 It is possible to satisfy the requirements according to the application.

At this time, the virtual threat T exists at a constant position during the execution of the scenario, and the virtual aircraft P can rotate the circular orbit in the clockwise or counterclockwise direction, and can repeatedly rotate the circular orbit.

On the other hand, the scenario executing section 40 re-executes the scenario in which the radius of the circular orbit, that is, the distance between the virtual aircraft P and the virtual threat T and the rotation speed of the virtual aircraft P, Performance can be analyzed.

The location estimating unit 50 estimates the position of the virtual threat T based on the direction detection information on the virtual threat T collected in the process of rotating the virtual aircraft P around the virtual threat T, . The position estimation can be performed by various methods such as a linear / nonlinear LSE (Linear Least-squared Error) algorithm, a Stansfield algorithm, and the like, which are subjected to position estimation performance analysis according to a method of using an intersection point of an incoming azimuth angle calculated as a result of direction detection by the direction detection unit Algorithm, and is not limited to a specific algorithm.

In this manner, the position estimating unit 50 estimates the position of the virtual threat T based on the latitude and longitude position information and the speed information of the virtual aircraft P by applying various position estimation algorithms, The estimated position of the virtual threat T is updated by continuously reflecting the accumulated direction detection information as the pivot P rotates the circular trajectory. For example, assuming that the direction detection performance has a RMS error of 1 degree, if the virtual aircraft P rotates the circular orbit, the direction detection information within the range of ± 1 degree around 90 degrees is accumulated, Estimation results will be obtained.

The location estimation performance analysis unit 60 analyzes the location estimation performance by comparing the location of the virtual threat T with the location of the virtual threat T estimated by the location estimation unit 50. [ The position estimation performance analysis unit 60 can analyze the position estimation performance according to the radius of the circular orbit, the rotation speed of the virtual aircraft P, and the position estimation performance according to the direction detection cycle in response to the change of the scenario When the error between the position of the virtual threat T corresponding to the center of the circular orbit and the position of the estimated virtual threat T reaches a predetermined reference value, for example, the positional estimation error rate relative to the distance is smaller than a predetermined reference value And estimates the position estimation performance of the position estimating unit 50 by applying various parameters to the estimation of the arrival time.

As described above, the analysis result of the position estimation performance analysis unit 60 can be used as various basic data such as comparing the position estimation performance of each algorithm with each other or deriving a condition that shows excellent estimation performance of a specific algorithm.

FIG. 3 is a flowchart of a method for analyzing a position estimation performance according to an embodiment of the present invention. Referring to FIG. 3, an organic operation process of the system 1 shown in FIG. 1 will be described.

Referring to FIG. 3, a scenario is executed in which the virtual aircraft P is configured to rotate a circular orbit around the position of the virtual threat T (S10). During the course of the scenario, the location of the virtual threat (T) is fixed.

Thereafter, the virtual threat (T) of the scenario and the physical simulator of the electronic information receiver of the virtual aircraft (P) are driven. That is, a simulated signal generated from the virtual threat T is generated and transmitted, and a simulated signal is received through a receiving module simulating an electronic information receiver of the virtual aircraft P (S 20 and S 30). At this time, the transmission of the simulated signal is adjusted so as to be incident on the receiving module at 90 degrees so as to be associated with the above scenario.

Thereafter, direction detection is performed on the received simulated signal (S40), and a position of the virtual threat (T) is estimated based on the direction detection information (S50). Then, the location estimation performance analysis is performed by comparing the estimated location with the location of the virtual threat T in the scenario (S60). (S20, S30), direction detection (S40), and position estimation (S50) are repeatedly performed until a preset reference value, e.g., a position error rate relative to the distance, reaches a predetermined reference value The position estimation performance can be analyzed.

In this case, it is needless to say that the above steps may be repeated while varying various parameters such as the circular orbit radius, the rotation speed of the virtual aircraft P, the direction detection execution cycle, and the band of the simulated signal.

On the other hand, in the embodiment of FIG. 3, the analysis is continued until the predetermined reference value is reached. However, the conditions related to the termination of the scenario execution, such as the scenario end time, the rotation angle of the virtual aircraft P, It is possible to implement the position estimation performance until it is satisfied.

Unlike the embodiment of FIG. 3, the direction detection result calculated using the physical simulator of the signal transmission unit 10 and the signal reception unit 20 is stored in advance, and a scenario is generated based on the stored direction detection result And perform location estimation analysis.

As described above, the position estimation performance analysis system 1 according to the embodiment of the present invention includes a simulation apparatus including a signal transmission unit 10 that simulates a threat in a laboratory and a signal reception unit 20 that simulates a receiver of an aircraft In addition, by constructing scenarios that can be linked to the simulation apparatus, a system that can be economically implemented in the laboratory, and can be integrally verified up to the RF stage compared to the conventional technology, which is simply limited to the verification of the position estimation algorithm It can be seen that there is a technical significance in terms of being able to provide.

While the embodiments of the present invention have been described in detail, those skilled in the art will appreciate that various modifications, substitutions, and alterations can be made herein without departing from the spirit of the present invention.

The scope of the invention is defined by the appended claims rather than by the foregoing description and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced by the appended claims and their equivalents. As shown in Fig.

Claims (10)

A scenario executing section for executing a scenario in which a virtual aircraft is configured to rotate a circular orbit around a position of a virtual threat;
A location estimator for estimating a location of the virtual threat based on direction detection information related to the location of the virtual threat collected during the execution of the scenario; And
And a location estimation performance analyzer for comparing the location of the virtual threat with the estimated location of the virtual threat and for detecting information related to the location estimation performance by the location estimation unit based on the comparison result. The method according to claim 1,
A signal transmitter for generating a simulated signal related to a signal generated from the position of the virtual threat and transmitting the generated simulated signal at a preset angle;
A signal receiving unit for receiving a simulation signal transmitted through the signal transmission unit for simulation of an electronic information receiver of the virtual aircraft; And
And a direction detecting unit for detecting information related to a direction of the simulated signal received through the signal receiving unit and providing direction detection information generated as a detection result to the position estimating unit. 3. The method of claim 2,
And a radio wave absorber positioned in front of the signal receiving unit and absorbing at least one of a reflected wave and a scattered wave. 3. The method of claim 2,
Wherein the signal transmitter transmits the simulated signal at 90 degrees to the signal receiver. The method according to claim 1,
Wherein the scenario executing section executes a scenario in which the virtual aircraft is configured to rotate the circular orbit in a clockwise or counterclockwise direction. The method according to claim 1,
Wherein the scenario executing unit re-executes a scenario in which at least one of the distance between the virtual aircraft and the position of the virtual threat and the rotational speed of the virtual aircraft is changed. The method according to claim 1,
Wherein the position estimating unit estimates the position of the virtual threat in consideration of at least one of the position information and the speed information of the virtual aircraft. The method according to claim 1,
Wherein the position estimating unit updates the estimated position of the virtual threat by reflecting the direction detection information accumulated according to the rotation of the virtual aircraft,
Wherein the position estimation performance analysis unit calculates a time point at which an error between the virtual threat position and the estimated virtual threat position reaches a predetermined reference value. A method for analyzing a position estimation performance through a position estimation performance analysis system,
(a) executing a scenario in which a virtual aircraft is configured to rotate a circular orbit around a location of a virtual threat;
(b) estimating the position of the virtual threat based on the direction detection information collected in the course of the rotation of the virtual airplane and related to the location of the virtual threat; And
(c) comparing the location of the virtual threat with the location of the estimated virtual threat, and analyzing the location estimation performance based on the comparison result. 10. The method of claim 9,
Generating a simulated signal related to a signal generated from a position of the virtual threat;
Transmitting the generated simulated signal at a predetermined angle in a signal transmitting unit;
Receiving a simulated signal transmitted through the signal transmitter in a virtual aircraft; And
Detecting information related to the direction of the received simulated signal and generating direction detection information based on the detection result.
KR1020150169183A 2015-11-30 2015-11-30 System for analyzing location estimating performance and method thereof KR20170063148A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102267287B1 (en) * 2020-02-28 2021-06-21 숭실대학교산학협력단 LSTM-based future threat prediction method and apparatus
KR20210103300A (en) * 2020-02-13 2021-08-23 국방과학연구소 Avionics electronic signals intelligence warfare integration system and control method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210103300A (en) * 2020-02-13 2021-08-23 국방과학연구소 Avionics electronic signals intelligence warfare integration system and control method thereof
KR102267287B1 (en) * 2020-02-28 2021-06-21 숭실대학교산학협력단 LSTM-based future threat prediction method and apparatus
WO2021172673A1 (en) * 2020-02-28 2021-09-02 숭실대학교산학협력단 Method and device for predicting future threat factor on basis of lstm

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