KR102040924B1

KR102040924B1 - Method for adaptive geo-positioning detection based on tdoa applied to multi-aircraft platform

Info

Publication number: KR102040924B1
Application number: KR1020170009567A
Authority: KR
Inventors: 김종규; 조제일; 박영주; 이병남
Original assignee: 국방과학연구소
Priority date: 2017-01-20
Filing date: 2017-01-20
Publication date: 2019-11-05
Also published as: KR20180085910A

Abstract

The present invention is the first arrangement step of placing the aircraft equipped with a receiver in a predetermined arrangement, the first position detection performing step of transmitting and receiving the position information between the receiver and performing the position detection based on the TDOA, by relocating the aircraft And performing a second position detection step of re-executing position detection based on TDOA, calculating an arrangement pattern based on a positional relationship between a master receiver and a target signal acquired through the first position detection performing step, and performing the aircraft according to the arrangement pattern. The present invention relates to an adaptive TDOA location detection method applied to an aircraft platform, wherein the location detection is re-executed by real-time relocation.

Description

Adaptive TDOA positioning method applied to aircraft platform {METHOD FOR ADAPTIVE GEO-POSITIONING DETECTION BASED ON TDOA APPLIED TO MULTI-AIRCRAFT PLATFORM}

According to the present invention, after performing position detection based on TDOA (Time Difference Of Arrival) with a plurality of aircraft equipped with a receiver, the aircraft is moved according to the position detection result calculated at the initial placement position, and thus the TDOA position is optimally positioned. A method of increasing the detection performance.

Location detection technology based on TDOA (Time Difference Of Arrival) is the most recent location detection technology in the EW (Electronic Warfare) field. In particular, many techniques have been researched and developed to detect TARA-based passive position detection by obtaining AOA (Angle Of Arrival) by sensing a target radiation signal. TDOA-based passive positioning technology calculates the location using the time difference of the target signal reaching each receiver by arranging four receivers, and the position detection performance is different according to the separation type of the receiver and the direction of the target signal. Will be shown. Fixed receivers cannot be moved after placement, so be cautious when deciding on the type of separation, and in the case of vehicle-mounted receivers, movement is possible, but in mountainous terrain, movement deployment is limited. Therefore, the conventional TDOA-based precision position detection technology using a fixed or in-vehicle receiver has a very good basic position detection performance, but there is a problem in that the performance is different depending on the spaced arrangement of the receiver and the direction of the target signal. . In addition, when considering the surface of the earth, it is difficult to secure a line of sight when detecting the location of the remote target signal, which places a limitation on the location detection of the target signal operated on the remote ground.

The present invention is equipped with a TDOA (Time Difference Of Arrival) based receiver in an aircraft in a plurality of spaced receiver-based position detection system, by optimizing by changing the arrangement of the receiver separation according to the direction of the target signal, An object of the present invention is to provide a precise location detection method having a higher accuracy for a target signal and an extension of a detection distance by securing a line of sight to a ground operation target signal.

The present invention is the first arrangement step of placing the aircraft equipped with a receiver in a predetermined arrangement, the first position detection performing step of transmitting and receiving the position information between the receiver and performing the position detection based on the TDOA, by relocating the aircraft And performing a second position detection step of re-executing position detection based on TDOA, calculating an arrangement pattern based on a positional relationship between a master receiver and a target signal acquired through the first position detection performing step, and performing the aircraft according to the arrangement pattern. Adaptive TDOA location detection method applied to the aircraft platform, characterized in that the location re-execution by real-time relocation.

The present invention can derive higher position detection accuracy by calculating an optimal receiver arrangement after initial TDOA (Time Difference Of Arrival) based position detection and redeploying the receiver after relocating the receiver. In addition, by installing and operating a receiver on the aircraft, it is possible to increase the detection distance of the ground operation target signal by securing a line of sight for the remote ground operation target signal.

1 is a conceptual diagram showing an initial arrangement step of an aircraft (receiver mounted) according to the present invention.
2 is a conceptual diagram illustrating a second position detection performing step according to the present invention.
3 is a flowchart of an adaptive TDOA location detection method applied to an aircraft platform according to the present invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiments of the invention may be modified in various forms, the scope of the invention should not be construed as limited to the embodiments described in detail below. This embodiment is provided to more completely explain the present invention to those skilled in the art. Therefore, the shape of the elements in the drawings and the like may be exaggerated to emphasize a more clear description. It should be noted that the same configuration in each drawing is shown with the same reference numerals. Detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention are omitted.

The present invention is the first arrangement step of placing the aircraft equipped with the receiver in a predetermined arrangement (S10) the first position detection performing step (S20), transmitting and receiving the position information between the receiver and performing the position detection based on the TDOA, the aircraft A second position detection performing step (S30) of relocating the position based on the TDOA and re-locating the positional relationship between the master receiver 1 and the target signal 3 acquired through the first position detecting performing step. The present invention relates to an adaptive TDOA position detection method applied to an aircraft platform, which calculates an arrangement pattern based on the arrangement pattern and repositions the aircraft in real time.

The arrangement pattern is calculated by measuring the direction of the target signal 3 based on the position of the master receiver 1.

Each aircraft is equipped with one said receiver and the receiver is a plurality of slave receivers and one said master receiver 1. In FIGS. 1 and 2, three aircraft equipped with the slave receiver and one aircraft equipped with the master receiver are applied, but the quantity of the aircraft may be changed.

The aircraft is arranged such that the slave receiver is equidistantly spaced about the master receiver 1 in the initial arrangement step S10. The “Y” shaped arrangement applied in FIG. 1 is equally detectable at any 360 ° position and thus is applied as a default value in the initial arrangement step.

The secondary position detection performing step (S30) is a target signal direction calculation step (S31) for calculating the direction of the target signal 3 based on the position of the master receiver 1, the direction according to the direction of the target signal Arrangement pattern calculation step (S32) of calculating an arrangement pattern, a movement point transmission step (S33) of transmitting a movement point for each receiver according to the arrangement pattern, a movement step (S34) of moving the aircraft to the movement point, the movement And a second TDOA location detection step (S36) for performing a location detection based on the TDOA at a point, and performing the step (S35) of transmitting and receiving the location information between the aircrafts after the moving step.

When the target signal 3 is positioned in front of the master receiver 1 in the target signal direction calculation step S31, the arrangement patterns in the arrangement pattern calculation step S32 are left and right of the master receiver. And a “ㅓ” shaped pattern in which the slave receiver is located at the rear side, and the rear side means the opposite side of the target signal with respect to the master receiver.

In FIG. 1, the "Y" -shaped arrangement pattern is applied, and in FIG. 2, the "Y" -shaped arrangement pattern is applied. Do.

Embodiments of the present invention described above are merely exemplary, and those skilled in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom. Therefore, it will be understood that the present invention is not limited to the forms mentioned in the above detailed description. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims. It is also to be understood that the present invention includes all modifications, equivalents, and substitutes within the spirit and scope of the invention as defined by the appended claims.

1: aircraft with master receiver
3: target signal
4: target signal detection
5: move the aircraft

Claims

An initial deployment step of arranging a plurality of aircraft carrying a receiver in a predetermined arrangement;
A primary location detection step of transmitting and receiving location information between the receivers and performing location detection based on a TDOA;
Performing a second location detection by relocating the plurality of aircraft and re-executing location detection based on the TDOA; Including
Based on the initial arrangement of the plurality of aircraft based on the positional relationship between the master receiver and the target signal obtained through the first position detection performing step to calculate the placement pattern and real-time repositioning the aircraft according to the placement pattern to re-execute the position detection ,
The arrangement pattern is calculated by measuring the direction of the target signal based on the position of the master receiver,
Each aircraft is equipped with one receiver and the receiver is a plurality of slave receivers and one master receiver,
In the initial deployment step, the plurality of aircrafts are disposed in a “Y” shape such that the slave receivers are equidistantly spaced about the master receiver.
The second position detection performing step may include: calculating a direction of the target signal based on the position of the master receiver;
A batch pattern calculating step of calculating a batch pattern according to a direction of the target signal;
A movement point transmission step of transmitting movement points for each receiver according to the arrangement pattern;
A moving step of moving the plurality of aircraft to the moving point;
And a second TDOA location detection step of performing location detection based on the TDOA at the movement point.
Adaptive TDOA position detection method applied to the aircraft platform, characterized in that the plurality of aircraft is arranged in the "ㅓ" shape according to the second position detection performing step.

delete

The method of claim 1,
When the target signal is located in front of the master receiver in the target signal direction calculation step, the placement pattern in the placement pattern calculation step, the slave receiver is located on the left, right and rear of the master receiver Adaptive TDOA Positioning Method Applied to an Aircraft Platform.

The method of claim 6,
And the rear side is the opposite side of the target signal with respect to the master receiver.