Method for electronic jamming of radio communication system

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to radio engineering and can be used to jam shipborne and airborne radio communication equipment. The method for electronic jamming a radio communication system involves using an aircraft as a jamming system carrier which is maintained on a "receiver-transmitter" line at the shortest possible distance from the receiver. The jamming system receives a probing information signal of the jammed system, reproduces carrier frequencies of the signal based on the signal and generates a noise signal, which is amplified and radiated towards the equipment being jammed. When radiating periodically with a period of about 3 s, pauses with duration of about 3 ms are made, during which the probing information signal of the transmitter is received and frequencies of the noise signals are refined when new carrier frequencies emerge.

EFFECT: high efficiency of electronic jamming.

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The invention relates to radio engineering, namely the radio-electronic suppression (RAP) is active interference of radio electronic facilities (REF), in particular radio communications with pseudorandom change the operating frequency, and can be used to suppress the ship and aircraft radio communications.

The known method REP RES active interference implemented in the active interference, protected by the RF patent for the invention №2103705, CL G01S 7/38, 1994, the station mask and impulse noise, is protected by RF patent for useful model №29818, CL NC 3/00, G01S 7/38, 2002, and in the forming device interference, protected by the RF patent for useful model №29198, CL NC 3/00, G01S 7/38, 2002, In accordance with this method, take the probe information signal, it plays its carrier frequency, form response noise interference on this frequency, amplify and radiate in the direction of the jammed RES.

The reception of the probe information signal, the reproduction of its carrier frequency, the formation of interfering signal, its gain and radiation in the direction of the jammed RES are essential features of the proposed method.

Factor hindering the achievement of the technical result provided by the invention, these analogues is relatively narrow frequency range suppression REF. R is SIRENIA same frequency band suppression RES makes the required energy potential station interference is so great, that way it becomes either impossible or very suppression is ineffective.

The closest in technical essence to the proposed method REP (prototype) is a method that implements polyharmonically interference [see, for example, Borisov, V.I. and other Immunity of radio communication systems with expansion of the range of signals, the method of pseudo-random adjustment of the operating frequency. - M.: Radio and communication. - 2000. - P.53-59, RIS, 1.24]. In accordance with this method, as in the above analogues, take the probe information signal, it reproduces the carrier frequency and form of response interference, amplify and radiate in the direction of the jammed RES. However, interference is not a noise signal in a wide range, and a set of unmodulated harmonic oscillations of equal power, distributed over the range of operating frequencies jammed RES and simultaneously radiated in his direction.

The reception of the probe information signal, to form the reciprocal interference, which is a set of unmodulated harmonic oscillations, the gain and the radiation in the direction of the jammed RES are essential features of the proposed method.

Describes how the prototype is somewhat more effective than noise interference and ceteris paribus obespechivaetsya high spectral density of the noise.

Factor hindering the achievement in prototype technical result provided by the invention is its relatively low efficiency. Are particularly affected by suppression systems with pseudorandom change the operating frequency (frequency hopping).

The fact that these systems are sufficiently wide range of frequency tuning and creating polyharmonically signals in this range is extremely difficult, although to a lesser extent than in the case of noise interference. It should be noted that suppressed the receiver, as a rule, is moved in space relative to the station interference, and in principle may be at a greater distance from the station interference, which directly reduces the interference power is proportional to the square of this distance. In addition, the simultaneous emission of a large number of harmonic signals virtually eliminates the reception of the probe information signal at the time of this radiation, and the transmitter suppressed system during this time may change the part of the carrier frequencies, or all of the carrier frequency, which is also ultimately reduce the effectiveness of interference.

Technical problem on which the invention is directed, is to increase the effectiveness of the RAP.

The technical result is achieved by the fact that in the known method the REP system radiosvjaz is continuously measure the coordinates of the carriers of the transmitter and receiver suppressed system, as the carrier complex RAP used aircraft, while retaining the carrier in place on the line "transmitter - receiver" at the lowest possible distance from the receiver, when detected in a received probe information signal transmitter information of radio photomanipulating signal from abruptly changing from one pulse to randomly carrier frequency measure their duration, repetition period and the carrier frequency, if the results of the measurement index values of the parameters of the probe information signal suppressed system generate interfering signals representing continuous signals on those frequencies as the carrier frequency of received probe information pulses, but without phase manipulation, the generated signals simultaneously at all frequencies amplify and radiate in the direction of suppressed receiver, the radiation periodically with a period of about three seconds to make a pause of about three milliseconds, during which accept the probe information signal transmitter and specify frequency noise and interference signals in the case of new carrier frequencies.

The combination of the newly introduced actions to hold complex RAP on the minimum distance the AI from suppressed receiver and the formation of breaks in radiation interference to ensure the "exploration" of the carrier frequencies for the adaptation of the parameters of the noise and interference signals to be suppressed not obvious from the prior art. There are no sources in which these actions independently or in conjunction with other method would be described. This allows us to consider the inventive method REP new and inventive.

The invention is illustrated by the drawing, which shows the following notation:

As the carrier 1 can be, for example, the aircraft airborne early warning (AWACS) with transmitter suppressed system "Getids" [N. Klimenko. and other Foreign Radioelectronics. - M.: Radio and communication - 1988, No. 5. P.85-96], as the carrier of the 2 - surface ship that has one of the receivers of this system, and as a carrier 3 - helicopter or unmanned aerial vehicle, to the torus is a complex REP, implements the inventive method.

The proposed method consists in the following.

Constantly measure the coordinates of all three carriers 1, 2, 3, have suppressed the transmitter, receiver and complex RAP. On the measured coordinates of the carriers 1 and 2 determine the direction of the carrier 1 carrier 2".

The position of the carrier 3 in the space is controlled so that it is constantly kept in line carrier 1 carrier 2" at the lowest possible distance R from the carrier 2, the reception antenna mounted on it complex RAP (see, for example, N. Klimenko. and other Radio VHF: status, prospects, especially the use of mode-hopping frequency. Foreign electronics, part 2. - M.: Radio and communication - 1990, No. 8, s, table 2) - discouny vibrator, and the transmitting antenna is aimed in the direction of the carrier 2 receiver suppressed system.

Mounted on the carrier 1, the transmitter generates, amplifies and radiates in the right directions, including the direction of the carrier 2, the probe information signal representing the radio photomanipulating signal duration of about 6 μs and a repetition period of about 25 μs. The carrier frequency of these pulses is abruptly changed from one pulse to pseudo law in which the range of about 250 MHz in increments of not less than 5 MHz (approximately 50 fixed frequencies). Each of the impulses is a sequence of about 30 parcels duration of 0.2 μs each carrier frequency, and each parcel corresponds to 1 or 0, which is determined by the phase shift keying. Thus, the information in the probe information signal is transmitted through phase manipulation.

The possible range of changes of the parameters described signal recorded in the memory of the computer complex RAP in the directory suppressed funds.

The complex RAP on the format 3 accept radiated by the transmitter of the probe information signal, measure the duration, the repetition period and the carrier frequency of the probe information of the radio pulses, determine the presence of phase manipulation. The measurement results are compared with the catalog values. If the decide to RAP. For this form of continuous interfering signals with the measured carrier frequencies. These signals increase and all at the same time radiate in the direction of the carrier 2. In the radiation periodically with a period of about three seconds provide a short pause of about three milliseconds. This allows for "exploration" of the probe information signal, that is, to determine, has not stopped his radiation and did not change the carrier frequency. In the latter case the appropriate change frequency noise and interference signals.

Radiated by a complex REP interfering signals with the probe information signal transmitter suppressed system is fed to the input of the receiver mounted on the carrier 2. Thus among these disturbances signals is necessarily present, except for short-term trehmilliardnyh pauses, the signal of the same frequency as the probe information, therefore, to decode the probe information signal is not possible.

Rate if K-factor_Pexceeding the interfering signal on the probe information for the model parameters suppressed funds and complex REP and their mutual arrangement:

PG_P=3·10⁴W is the energy of suppressed communication systems

where: P=3·10³W - power radiation,

G_P=10 DB antenna gain;

PG_RAP=10⁵W is the energy of the complex RAP.

where P=10³W - power radiation,

G_RAP=20 DB antenna gain;

γ_P=0,5 - coefficient mismatch of the polarization is suppressed, and noise and interference signals;

Δf=250 MHz tuning range of the carrier frequencies of the probing signal information;

Δf_CR=5 MHz bandwidth receiver suppressed system;

D=150000 m - distance carrier 1 carrier 2";

R=5000 m - distance carrier 2 - novtel is 3".

The calculation of K_Pcan be made according to the formula

$$K_P=\frac{P{G}_{PEP}\cdot D^2\cdot \Delta f_{pp}\cdot {\gamma }_P}{P{G}_P\cdot R^2\cdot \Delta f}$$.

Substituting numerical values, we get

$$K_P=\frac{{10}^5\cdot {150000}^2\cdot 5\cdot \mathrm{0,5}}{3\cdot {10}^4\cdot {5000}^2\cdot 250}=30$$.

Thus, the coefficient of excess of the interfering signal on the probe information signal is To_P=30, that is, of 14.8 dB, which is sufficient for effective suppression of the latter.

It should be noted that in the method-prototype distance R between media 2 and 3 are not controlled and may significantly exceed 5 km. It may be, for example, (50÷100) km In this case, the suppression ratio will not exceed values of 0.075÷0,3 that is not enough to ensure the ecene any effective interference, or requires such energy complex REP that its implementation becomes impossible.

In addition, in the method prototype noise radiated continuously, which is not able to receive any signals during radiation due to the limited isolation between the receiving and transmitting antenna complex RAP. This further reduces the efficiency of suppression of the radio system, if interference all carrier frequencies or part of them in the probe information signal will be changed.

In the inventive way by minimizing the distance R between media 2 and 3 and the introduction of short pauses in the emission of noise and interference signals these drawbacks are absent. This allows us to conclude that the effectiveness of the proposed method is higher than that of the prototype method.

The proposed method RAP fairly easy to implement.

The coordinates of the carrier 3 can be determined using a specially established its satellite Navigator (see, for example, Rembowski A.M. and other radio monitoring: problems, methods, tools): Hot line - Telecom - 2006. - S-340, RIS, 8.19, 8.20, or the site of JSC "IRCOS", Moscow). Coordinates media 1 and 2 by using specialized tools opening the radio environment, members of the media 3 (see, for example, Rembowski A.M. and other radio monitoring: problems, methods, means the a - M: Hot line - Telecom - 2006. - S - 277, RIS; Nikolenko NF and other fundamentals of theory of electronic warfare. - M.: Voenizdat - 1987. P.21-23, 21, 22; pp.272-276, RIS).

Detection equipment and probing analysis of the information signal can be made on the basis of the digital receiver direct amplification with an omnidirectional antenna and an instrument module MS 32.01-based VLSI System-on-chip" 1879 VMZ (see, for example, the website of the SEC, "Module", Moscow), and on the basis of digital superheterodyne receiver, paired with the PC, with an offset frequency of eight narrowband channels relative to each other on the bandwidth of the intermediate frequency amplifier 32 MHz with an average frequency of 70 MHz (see, for example, Rembowski A.M. and other radio monitoring: problems, methods, funds. - M.: Hot line - Telecom - 2006. - P.132-135, 4.3).

Generators of noise and interference signals can be made on the basis of the integrated frequency synthesizers (see, for example, L. Belov electronics. Technology. Business. 2004), No. 3 - p.44, table 2).

Preliminary and terminal power amplifiers can be made on the basis of a monolithic solid-state amplifiers (see, for example, the website of ZAO "Microwave systems" www.mwsystems.ru and Akimiski. Electronics: Science. Technology. Business 2010, No. 2, pp.62, figures 1 and 2).

Transmitter antenna interference can be performed is based shestnadtsatiletnei flat phase grating (see, for example, beetle, MS, Molochkov SHE): - L.: Energy - 1966 - C, Fig.3-31 (similar)pattern Week_bottoms=21 degrees, the gain K_y=21 dB, the spatial angle Up=180 deg and a width and a height of about 1 m, beam steering which is the phasers and the switch (see, for example, product catalogs NPF "Micran", Tomsk, website www.micran.ru and firms Elisra, HERLEY General Microwave ISRAEL website www.mw-elisra:com).

The feasibility of the main devices on modern element base complex RAP, receipt of the probing signal, analyzing, shaping, and strengthening radiation interference, confirms the feasibility of the proposed method the jamming of radio communication systems.

Method the jamming of radio system based on the probe information signal suppressed system, playback of the carrier frequency, the formation of interfering signal, the gain and the radiation in the direction of the oppressed means, characterized in that the continuously measure the coordinates of the carriers of the transmitter and receiver suppressed system, as a carrier of complex electronic countermeasures used aircraft, while retaining the carrier in place on the line "transmitter - receiver" on the shortest possible distance from the pickup is nick, when detected in a received probe information signal transmitter information of radio photomanipulating signal from abruptly changing from one pulse to randomly carrier frequency measure their duration, repetition period and the carrier frequency, if the results of the measurement index values of the parameters of the probe information signal suppressed system generate interfering signals representing continuous signals on those frequencies as the carrier frequency of received probe information pulses, but without the phase manipulation, the generated signals simultaneously at all frequencies amplify and radiate in the direction of suppressed receiver, the radiation periodically with a period of about three seconds to make a pause about three milliseconds, during which accept the probe information signal transmitter and specify frequency noise and interference signals in the case of new carrier frequencies.