RU2587474C1 - Method for detecting "own-alien" - Google Patents

Abstract

FIELD: radar.

SUBSTANCE: invention relates to radars, radio communication, radio navigation and radio control and can be used in systems of radar identification. Said result is achieved by fact that in system identification (information control system) concentrator is used featured with transponder, which receives information on coordinates of "own" objects, and also performs a range of functions previously performed each of them, which allows providing low probability of grip equipment response enemy.

EFFECT: technical result is reduction of probability of capture of enemy equipment response.

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Description

The invention relates to radio engineering, in particular to radar recognition systems (RLO).

A known method of identifying "friend or foe", including radiation towards the requested object modulated by the request code for laser radiation, receiving and demodulating laser radiation by the requested object and changing the reflective properties of the controlled corner reflector placed on board the requested object, in accordance with the established code [patent No. 2100823 "System for detection and recognition"]. The disadvantages of this method include: the need for direct visibility between the interrogator and the respondent; dependence on visibility conditions (in particular, on weather conditions) on the interrogator-responder line; increased visibility of the defendant for laser enemy control due to the angular reflector placed on the defendant.

A known method of recognition "friend or foe", implemented in the recognition system on the battlefield BCIS [Foreign Military Review No. 7, 2001, S. 24-25], which consists in transmitting a request signal modulated in frequency with a special code via a radar channel, with with the help of which the requested object is previously detected, by receiving and decoding the request signal by the equipment located on board the requested object, and emitting a coded response signal, receiving and verifying the authenticity of the response signal on board the interrogator, In order to operate the system, the millimeter wave range, the highly directional interrogator antenna, and the omnidirectional antenna of the transponder are used. The disadvantage of this method is its applicability only in conditions of direct visibility between the interrogator and the respondent.

There is a known method of recognizing “friend or foe” [Defense express of September 2, 2005], which consists in obtaining, by individual navigation means of all objects integrated into a local information-control system, information about their own coordinates and its periodic transmission together with their personal identification a number in encoded form to all objects of a given information management system through a local communication network serving this information management system. This method does not require the presence of direct visibility between objects and the formation of a special request signal, since the location of "their" objects is periodically reported to all objects united by this information-management system. The disadvantages of this method are: high load on the local communication network serving this information management system; a high probability of an attack of “one's own” object due to the fact that during the update of information about the coordinates of a specific object, these coordinates can change significantly.

Closest to the claimed method is a method of identifying "friend or foe" [patent No. 2386144 "Method for identifying" friend or foe ""], which is selected as a prototype. The method does not require the use of pointed antennas for transmitting request signals and consists in transmitting, by objects integrated into the local information management system, information about its own coordinates together with its personal identification number in encoded form in response to receiving an encoded request signal in which the requestor includes information about the coordinates of the point at which it is supposed to strike, and with the objects that received the request signal, information about the coordinates of the point struck The shock state is compared with its own coordinates, and the response signal is transmitted only if their own coordinates coincide with the coordinates of the point of impact with a predetermined error. However, when using this method, it is highly likely that the enemy will capture response equipment that provides information about the own coordinates of the identifiable object together with its personal identification number in encoded form in response to receiving the encoded request signal, since this equipment is equipped with all “their” identifiable objects.

The inventive method of recognizing "friend or foe" can reduce the likelihood of the enemy capturing the response equipment. This is achieved due to the fact that the response equipment (defendant) is equipped with only one object - a hub. The respondent receives from the interrogator a coded request signal containing information about the coordinates of the point of striking, compares this information with information about the coordinates of its objects and gives the interrogator a response signal “own” only if the coordinates of one of “its” objects coincide with the coordinates of the point of striking with predetermined error. At the same time, “their” objects, except for the hub, do not receive request signals and, therefore, do not answer them, since they do not have the corresponding response equipment.

Since only the concentrator is equipped with the response equipment, and “its” objects in the general case are N (including the concentrator), the probability of the enemy capturing the response equipment is reduced by a factor of N compared with the prototype (provided that the concentrator for the enemy does not differ from the reconnaissance features any of the objects).

For proof, suppose that all of the N “own” objects are the same. Let any of them be captured with probability P ₁ . In the prototype, all such objects are equipped with response equipment, so the capture of any of them is equivalent to the capture of response equipment, that is

P _{capture AO} = P ₁ .

). Следовательно, при предлагаемом способе вероятность захвата аппаратуры ответа равна вероятности захвата концентратораIn the proposed method, one of the N objects acts as a hub, and only it is equipped with response equipment. If the concentrator by intelligence features is no different from other objects, then the response equipment will be captured only when one of the N objects is captured (probability of this is P ₁ ) and it turns out to be a concentrator (probability of this $$R_{\mathrm{to}}=\frac{\mathrm{one}}{N}$$

) Therefore, with the proposed method, the probability of capturing the response equipment is equal to the probability of capturing the hub

and indeed N times smaller than in the prototype.

The proposed recognition method is as follows. The object making the request (the interrogator) transmits the encoded request signal to the concentrator responder to identify “its” object before striking. The structure of the request signal includes information on the coordinates of the point at which it is planned to strike. The request signal received by the hub response equipment is decoded and the coordinates of the strike point are compared with the coordinates of their location received from "their" objects, which are determined using the individual navigation tools of the objects. If the coordinates of one of "your" objects coincide with the coordinates of the point of impact with a predetermined error, the concentrator response equipment generates and gives the interrogator a response signal "your own".

Thus, the availability of response equipment only at the concentrator reduces the likelihood of its capture by the enemy.

New features with significant differences are:

1. Equipping the response equipment (respondent) with only one “own” object - a hub.

2. The hub receives information on the coordinates of each of its “own” objects.

3. Transfer of functions performed by each of its “own” objects (receiving a request signal, comparing the coordinates of the object with the coordinates of the point of impact, generating a response signal to the interrogator) to one concentrator responder.

These signs have significant differences, as in the known methods are not found.

The use of these signs will provide a low probability of capturing the response equipment by the enemy.

Implementation of the proposed method is possible using structural schemes of recognition systems of various types [Radar systems of multifunctional aircraft. T. 1. Radar - the information basis of the combat operations of multifunctional aircraft. Systems and algorithms for primary processing of radar signals. Ed. A.I. Kanaschenkova and V.I. Merkulova. - M .: Radio engineering, 2006, p. 620, 622, 623, 633, 637, 638]. The principle of operation of the autonomous recognition system, as well as the block diagram of the interrogator and respondent of such a system are given in [Radar devices (theory and construction principles). Ed. V.V. Grigorina-Ryabova. - M .: Owls. Radio, 1970, S. 659, 661, 662].

Claims (1)

A method of recognizing “friend or foe”, including the receipt by individual navigation aids of all objects integrated into a local information-management system, information about their own coordinates and its transmission together with their personal identification number in encoded form, characterized in that the reception of this information is used as part of this system, a hub equipped with a transponder, which, upon receipt of an encoded request signal from the interrogator, includes information Ration about the coordinates of the point of the prospective strike, compares the coordinates of each of its “own” objects with the coordinates of the point of strike and, if they coincide with a predetermined error, generates and gives the interrogator a response signal “own”.