RU2386144C1 - Friend-or-foe identification method - Google Patents

Abstract

FIELD: radio engineering.

SUBSTANCE: friend-or-foe identification method does not require use of narrow-beam antennae for transmission of demand signals, consists in the fact that the objects integrated in a local information management system transmit the data on their own coordinates together with their personal ID number in the coded form in response to reception of coded demand signal to which the interrogator adds the data on the coordinates of the point which is supposed to be attacked; at that, the objects which have received the demand signal compare the data on the coordinates of the point which is supposed to be attacked to their own coordinates, and signal response is transmitted in case their own coordinates coincide with coordinates of the point which is supposed to be attacked with pre-set error.

EFFECT: improvement of reliability and prevention of attack and decrease of communication system traffic.

Description

The invention relates to radio engineering, in particular to recognition systems "friend or foe".

There is a known method of recognizing "friend or foe", including radiation towards the requested object modulated by the laser radiation request code, 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 (see patent No. 2100823 "System for detection and recognition"). This method requires recognition of direct visibility between the interrogator and the respondent, the possibility of its implementation depends on weather conditions and generally on the visibility conditions on the line "interrogator-responder". In addition, an angular reflector mounted on the transponder according to the described method increases the visibility of the latter for laser means of controlling enemy weapons.

There is a known method of recognition "friend or foe", implemented in the recognition system on the battlefield BCIS (see "Foreign Military Review" 2001, No. 7), which consists in transmitting a request signal modulated in frequency with a special code via a radar channel, using which the requested object is previously detected by the reception and decoding of the request signal by the equipment located on board the requested object, and the emission of the encoded response signal, the reception and verification of the authenticity of the response signal on board the interrogator, In order to operate the system, the millimeter wavelength range, the highly directional interrogator antenna, and the omnidirectional transponder antenna are used. This method is also applicable only in conditions of direct visibility between the object performing the request and the requested object.

Closest to the proposed is a method of recognition of "friend or foe", published in the magazine Defense express, September 2, 2005, adopted as a prototype.

The prototype method includes the receipt by individual navigation means of all objects integrated into a local information-management system, information about their own coordinates and its periodic transmission together with their personal identification number in encoded form to all objects of this information-management system, through a local communication network serving this information management system.

The prototype method, in principle, does not require direct visibility between objects and does not require the formation of a special request signal, since the location of “their” objects is periodically reported to all objects integrated by this information-control system.

The disadvantages of this method are the high load on the local communication network that serves this information management system, as well as the insufficient reliability of preventing an attack of “your” object due to the fact that during the time equal to the period of updating the information about the coordinates of a particular object, these coordinates can change significantly.

The aim of the invention is to increase the reliability of preventing the attack of "own" units and reducing the traffic of the communication system required to solve the problems of recognition of "friend or foe".

To address these shortcomings in the method of recognition of "friend or foe", including the receipt by individual navigation means of all objects combined into a local information-control system, information about their own coordinates and its transmission together with their personal identification number in encoded form, according to the invention, the transmission of information about their coordinates together with their personal identification number in encoded form is carried out in response to receiving encoded about the request signal, and in the request signal include information about the coordinates of the point at which they intend to strike, the objects that received the request signal, information about the coordinates of the point of striking are compared with their own coordinates, and the response signal is transmitted if their own coordinates coincide with the coordinates of the point of impact with a predetermined error.

The proposed recognition method is as follows. The requesting entity (interrogator) transmits an encoded request signal 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. Since the request signal is transmitted using an omnidirectional antenna, it is received by all radio facilities operating at the interrogator frequency or in a common local communication network with it, in which a certain time-frequency resource is allocated for the transmission-reception of friend-alien identification signals. The decoded request signal is decoded by them, and the received coordinates are compared with their own, which are determined, for example, using the equipment of a satellite navigation system such as GLONAS (NAVSTAR) or using autonomous navigation aids and are input into the transponder's equipment. A response signal to a request signal containing a personal identification number and an established code of belonging to “own” objects is generated and transmitted only by those objects whose own coordinates differ from those received in the request signal by no more than a predetermined value.

Thus, the number of objects simultaneously operating in the communication network, through which the transmission and reception of identification signals is carried out, is reduced, which reduces the traffic of the communication system, which must be allocated for solving identification problems. Since people are questioned about belonging to “their” objects located within a limited spatial area and immediately before striking, the reliability of preventing an attack of “their” unit increases.

Claims (1)

A method of recognizing “friend or foe”, including the receipt by individual navigation means 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 transmission of information about their own coordinates together with their personal identification number in encoded form is carried out in response to receiving an encoded request signal, and the request signal they include information about the coordinates of the point at which they intend to strike, objects that have received a request signal, information about the coordinates of the point of striking, are compared with their own coordinates, and the response signal is transmitted if their own coordinates coincide with the coordinates of the point of striking in advance established error.