RU2696002C1 - Method of relayed interferences creation - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: invention relates to radio engineering and can be used to disrupt the standard operation of counterbattery activities radar stations (RS) of the enemy. Technical result is achieved due to optimization of delay of counterbattery activities broadband radar signals at various time intervals and allowance for operational situation in the specified area, which makes it possible to hide fire positions of the protected artillery unit without negative consequences for neighbouring military formations.

EFFECT: high efficiency of the method of generating relayed interference owing to prolonged latent destructive action on the counterbattery activities radar station of the enemy's onboard radar.

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Description

The invention relates to radio engineering and can be used to disrupt the normal operation of radar stations (radar) counter-battery combat (KBB) of the enemy by exposing them to interference of the relay type.

The known method implemented in the system of creating radio interference (see Pat. USA No. 4103237, SEC N04K 3/45, N04K 3/46, N04K 3/28, N04K 2203/32, N04K 3/00, publ. 07.25.1978). It involves the reception of broadband signals (SHPS) of the KBB radar, amplification and storage, followed by their repeated re-emission.

The analogue method is able to disrupt the regular operation of the KBB radar. However, this destructive effect is easily detected. As a result, measures are being taken to rebuild the KBB radar or use fire action on a relay of a relayed interference (IRP).

A known method implemented in the system of counteraction of the enemy radar station "Antiradar" (see Pat. RF №2518515, IPC Н04К 3/00, G01S 7/38 (2006.01), publ. 06/10/2014, bull. No. 31).

The analogue provides directional reception and amplification of radar signals that are used as jamming signals, and multiple emission of jamming signals is carried out using a set of n spatially separated transmit antennas. The method provides the creation on the enemy’s radar screen of false targets moving both in range and direction. However, the analogue has a disadvantage that limits its use. The interference effect on the KBB radar is easily detected, which entails the restructuring of the station, and the effectiveness of the method tends to 0.

The closest in its technical essence is the method of creating deliberate interference (see Pat. RF No. 2543078, IPC N04K / 00 (2006.01), published on 02.27.2015, Bulletin No. 6). The method consists in measuring the coordinates of one’s own location, determining the composition of the orbital constellation of the global navigation satellite system used in a given area, receiving signals from navigation satellites for all users in a given area, storing received messages, distorting navigation messages in them by delaying them for various time intervals, the formation of the total interference signal with distorted navigation messages, the radiation of the total interference signal power exceeding power legitimate satellite signals, and during prolonged operation periodically update the previously stored navigation messages, wherein the user defined classes is set false and routes them velocity of each class of users, calculating corresponding values of signal delay.

The prototype method provides an increase in the time of latent distortion of navigation parameters for radio navigators of a group of users of the global navigation satellite system located in a spatially limited, but known area. A positive effect is achieved by optimizing the delay sizes of the signals of navigation satellites when they are relayed.

However, the prototype has a disadvantage that limits its use. The latter consists in the low efficiency of suppressing radar jamming radar, due to the ability of the enemy to quickly detect the destructive effect of relayed interference due to the fact that the delay of the fire alarm at different points in time is not consistent with the spatial position of the projectile or missile.

The objective of the proposed technical solution is to increase the efficiency of the method of creating relayed interference due to the long-term covert destructive impact on the enemy’s KBB radar by optimizing the delay of their SPS at various time intervals and taking into account the operational situation in a given area, which ultimately allows you to hide the real firing positions of the protected artillery unit without negative consequences for neighboring military units.

определяют значение временной задержки ШПС τ₀ на дистанции R из выражения τ₀=2R/c, где с - скорость света, задают стандартную траекторию полета снаряда G(t)_j j-го калибра, j=1, 2,…, J, и вычисляют его пространственные координаты (Х_сн, Y_сн, Z_сн)_i в моменты времени t; с дискретностью Δt, выпущенного из орудия с координатами местоположения (X, Y)_от, для каждого i-го дискретного интервала времени i At, i=1,2,…, I, рассчитывают удаление снаряда от ИРП на начальном этапе его полета длительностью Δt⋅I по формуле:The problem is achieved by the fact that in the known method of creating relayed interference, which consists in measuring the coordinates (X, Y) of the emitter of the relayed relay interference, receiving the enemy _{NPS of} duration T, remembering the received signal, distorting it by introducing a delay τ _ass for various time intervals, amplify and emit it as an interfering signal with a power exceeding the power of a legitimate signal, at the preparatory stage determine the exclusion zone, in which there are no military units dividing a spatial interval between the disturbance and the protected artillery unit, determine the coordinates (X, Y) _{from the} center of the zone, calculating the distance R between the position of the PRI and the center of the exclusion zone:

determine the value of the time delay of the NPS τ ₀ at a distance R from the expression τ ₀ = 2R / c, where c is the speed of light, set the standard flight path of the projectile G (t) _{j of the} j-th caliber, j = 1, 2, ..., J, and calculate its spatial coordinates (X _sn , Y _sn , Z _sn ) _i at time t; with discreteness Δt released from the gun with location coordinates (X, Y) _from , for each i-th discrete time interval i At, i = 1,2, ..., I, the distance of the projectile from the RPI at the initial stage of its flight of duration Δt is calculated ⋅I according to the formula:

and in the process of combat work, after a shot of the guns of the protected artillery unit, they fix the time t ₀ , the time of reception of the first ShPS t _i and determine the direction of Q to the radar KBB, form a response jamming signal based on the received ShPS by delaying it for the time τ _i = 2R (t _i ) / c, which is emitted in the Q direction, with the arrival of the next ALS of the KBB radar from the Q direction, an interfering signal is generated with a corresponding delay τ _l = 2R _l / c after the time interval l⋅Δt; after the time interval Δt⋅I, the formation cycle is completed jamming signal la, and the beginning of a new cycle of formation of an interfering signal is determined at the time of the next shot artillery guns protected units.

In this case, the relayed relay emitter is placed at a distance of 0.5 ... 0.7 km from the line of contact of the troops opposite the protected artillery unit.

The new set of essential features listed above is due to the fact that, using a delay in a certain way, the KBB radar signals simulate an artillery shot from another (empty) zone, which makes it possible to hide real firing positions of the artillery unit from the enemy and not harm the neighboring units.

The claimed method is illustrated by drawings, in which are shown: in FIG. 1 is an embodiment of a relayed emitter on a site;

in FIG. 2 - a generalized algorithm for the formation of relayed interference;

in FIG. 3 is a generalized block diagram of a relayed emitter;

in FIG. 4 - the main characteristics of some KBB radars.

It is known that the detection of artillery firing positions by means of the KBB radar is performed by discrete scanning of a phased array antenna beam at a constant value of its position in elevation (see Figs. 1 and 2). The elevation angle is chosen close to or equal to the angle of the shelter to the horizon plane (see Golik A.M. Multichannel radar stations for reconnaissance of firing positions. Part I, II. - M .: MO, 1997. - 84 s, - 74 s). The latter depends on the terrain. The radar probe signal is usually a radio pulse, phase-coded in accordance with the 13-position Barker code. It is emitted by packets at the search and auto-capture stages. Of all the radar marks from the projectile formed in a given angular position of the beam, one with the highest amplitude is selected and its autocapture is performed.

The measurement of the current coordinates of the projectile (missile) of the KBB radar is carried out using angular range discriminators, the functions of which are usually implemented in software algorithms. The determination of the coordinates of the firing positions is carried out by radar tracking of a flying projectile in three coordinates at the initial section of the flight path (see Fig. 1) and its extrapolation to the departure and hit points.

Modern KBB radars (see Fig. 4) operate in the ranges 2-4.4-8 and 9-12 GHz, which makes it possible to detect the firing positions of mortars at a distance of up to 30 km, artillery up to 50 km, and launchers of multiple launch rocket systems fire - up to 80 km (see the radar counter-battery struggle of foreign countries. Electronic resource http://www.modernanny.ru/article/126). Under conditions close to the simultaneous (less than 5 seconds) detection of several shells with a common trajectory in flight, they decide to participate in the artillery fire.

The invention consists in the following. Relayed interference emitter is placed as close to the contact line (preferably on the local elevation opposite the protected artillery positions. In the interval between artillery positions and disturbance selected exclusion zone, which lacks its military units. Determine the coordinates (X, Y) _IRP location IRP and the center of the exclusion zone (X, Y) _from ⋅ The exclusion zone in the proposed method is necessary so that the enemy makes an erroneous decision about the presence of a protected artillery unit in it.

To this end, measure the mutual distance between the IRP and the center of the exclusion zone

The value R to determine the value of the time delay NLS (signal delay time of the shot) τ ₀

where c is the speed of light in free space.

At the next stage, the standard trajectory of the projectile G (t) _{j of a} certain j-th caliber is set. The beginning of this trajectory coincides with the coordinates (X, Y) _from , and is oriented in the direction of the line of contact of the troops.

Next, determine the spatial coordinates of the projectile (X _sn , X _sn , Z _sn ) _i at time t _i with a given discreteness in time Δt. The operations mentioned above are performed using a special computer and a geographic information system, for example, Panorama. This operation is carried out only for the initial portion of the projectile flight.

For each i-th discrete time interval i⋅Δt, i = 1,2, ..., I, the projectile removal from the IRP is calculated

In the process of combat work after firing the guns of the protected artillery unit, this time point t _{0 is} fixed, the time of receiving the first ShPS is t _i and the direction Q is determined on the KBB radar. A response jamming signal is generated based on the received and amplified SHPS by delaying it for a while

which emit in the direction of Q. With the arrival of the next BBA of the KBB radar from the direction of Q, at a time interval l⋅Δt, a response jamming signal is generated with a new delay τ _l = 2R (t _l ) / c. After the time Δt⋅I completes the cycle of formation of the relayed interference signal.

The beginning of a new cycle of formation of an interfering signal t ₀ determines the moment of the next shot of the gun of the protected artillery unit. It should be noted that the delay between the moment of the shot and the beginning of the next cycle t ₀ should be maximally reduced or taken into account in the calculation in (4) as a constant coefficient.

In the process of long-term operation, to ensure the secrecy of the use of the used interference, it is advisable to periodically change the description of the projectile flight path G (t) _j , j = 1,2, ..., J, and, accordingly, the values of the latencies of the BSS in accordance with (3).

The inventive method can be implemented on the basis of known elements (see Fig. 3). The relay interference generating device comprises a receiving antenna 1, a high-frequency amplifier 2, an anti-jamming unit 3, a first memory unit 4, a delay element block 5, a power amplifier 6 and a transmitting antenna 7 connected in series to a delay calculation unit 8, and a second memory unit 9 and a control unit 10, the group of outputs of which is connected to the group of inputs of the block of delay elements 5, a clock generator 11, the output of which is connected to the synchronization inputs of the delay calculation unit 8, the first and second blocks memory shafts 4 and 9, respectively, of a block of delay elements 5 and a control unit 10, a first input bus 12 connected to a group of information inputs of a block 8, a second input bus 13 connected to a second information input of a control unit 10, a third group of information inputs of which are connected to the second output of block 2, in series connected to the spatial parameters meter ШПС 15 and the control unit of the transmitting antenna 14, the output of which is connected to the control input of the transmitting antenna 7, and the synchronization inputs of blocks 14 and 15 are united and connected to the output of the clock generator 11.

At the preparatory stage, the flight path G (t) _j , the coordinates of the location of the RPI and the exclusion zone, the geographic information system of the analyzed area, the values of Δt and I are set by the first input bus 12 to the delay calculation unit 8, and using the block 8, the mutual distance between the IRP and the center of the exclusion zone R (expression 1), the signal delay value is τ ₀ (expression 2). After that, using block 8 using the G (t) _j and GIS determine the spatial coordinates of the projectile at discrete time instants t _t . For each discrete time instant t _{i, the} distance of the projectile from the RPI R (t _i ) is calculated in accordance with (3). The obtained values of R (t _i ) are converted into the desired time delays in accordance with (4). The values of τ _i found in block 8; (expression 4) is stored in the second memory block 9. As a result, the device is ready for operation.

In the process, the input SHPS is received by antenna 1, amplified in block 2, after which it enters the interference protection block 3. The latter is a comb of narrow-band paths containing a filter and an interference detector.

The paths in which interference is detected are blocked, as a result of which sections of the NPS spectrum affected by the interference are rejected. The signal, cleared of interference, is fed to the inputs of the first memory block 4, where its implementation is recorded with a duration of T.

At the same time as block 1 of the ШПС РЛС, the KBB receives the spatial parameter meter ШПС 15, which determines the direction of its arrival Q. The measured value Q is supplied to the group of information inputs of the control unit of the transmitting antenna 14. In block 14, the value of Q is converted into an analog control signal, with which transmit antenna orientation 7.

The memorized implementation of the ШПС is read from the outputs of block 4 to the inputs of the block of delay elements 5, the operation of which is carried out under the control of block 10. When the signal (pulse) arrives at the second input bus 13 about the moment of the gun shot t ₀ and the time of arrival of ШПС t _i from the output of block 2 block 10 determines the value of the necessary time delay of the relay signal τ _l. Information about the shot (control pulse to bus 13) from the firing position of the artillery unit can be transmitted both over the air and over the optical fiber (preferred option). A control signal with a value of τ _{l of} block 10 is supplied to the group of control inputs of block 5. As a result, the received ШПС is delayed in block 5 by the specified time interval, amplified in block 6, and emitted by antenna 7 in the Q direction. These operations are synchronized by pulses of the clock generator 11 .

Thus, the proposed sequence of actions over the ShBB radar KBB provides a distortion of the information received by the enemy about the location of the protected artillery unit, and, therefore, effectively solves the problem.

Claims (4)

1. The method of creating relay interference, which consists in measuring the coordinates

a relay interference emitter (IRP), receive an adversary’s broadband signal (SHPS) of duration T, remember the received signal, distort it by introducing a delay τ _ass at various time intervals, amplify and emit it as an interfering signal with a power exceeding the power of the legitimate signal, different the fact that at the preparatory stage they determine the exclusion zone, in which there are no military units in the spatial interval between the IRP and the protected artillery unit, share coordinates

the center of this zone, calculate the distance R between the position of the IRP and the center of the exclusion zone according to the formula:

determine the value of the time delay of the NPS τ ₀ at a distance R from the expression τ ₀ = 2R / s, where c is the speed of light, set the standard projectile flight path

j-th gauge, j = 1, 2, ..., J, and its spatial coordinates are calculated

at times t _i with discreteness Δt released from the gun with location coordinates

for each i-th discrete time interval i⋅Δt, i = 1, 2, ..., I, calculate the removal of the projectile from the RPI at the initial stage of its flight of duration Δt⋅I according to the formula:

and in the process of combat work after a shot of the guns of the protected artillery unit, they fix the time t ₀ , the time of reception of the first ShPS t _i and determine the direction Q to the counter-battery combat radar (KBB radar), form a response jamming signal based on the received ShPS by delaying it for a while

which emit in the Q direction, with the arrival of the next BSS of the KBB radar from the Q direction, an interfering signal is formed with a corresponding delay after a time interval l⋅Δt

after the time interval Δt⋅I ends, the jamming signal generation cycle is completed, and the beginning of a new jamming signal generation cycle is determined at the moment of the next shot of the gun of the protected artillery unit. 2. The method according to p. 1, characterized in that the relayed relay emitter is placed at a distance of 0.5 ... 0.7 km from the contact line of the troops opposite the protected artillery unit.

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