RU2572083C1 - Jamming method and device (versions) - Google Patents

Abstract

FIELD: radio engineering, communication.

SUBSTANCE: method comprises opening a hop set used in the jammed radio network, and the generation of an interfering signal with matched structure and a given duration begins at said frequencies during pause in operation of network subscribers. A jamming device comprises first and second antenna systems, a multichannel radio receiving device, an analogue-to-digital conversion unit, a signal selector, an operating frequency determining unit, a cutoff frequency determining unit, a hop set determining unit, an interference transmitter, a reference frequency unit with corresponding links, a pause determining unit, as well as a control unit in a second version of the device and a switch, a multichannel pause detection unit, a control unit, an adder, m-1 interference transmitters and m-1 second antenna systems in a third version of the device.

EFFECT: providing effective radio suppression of a given radio network with pseudorandom operating frequency adjustment with significant reduction of power consumption at the same time.

6 cl, 14 dwg

Description

The group of the claimed objects, united by a single inventive concept, relates to the field of radio engineering, namely to the technique of creating intentional radio interference, and, in particular, can be used for selective radio suppression of radiation sources, a priori information about the load of operating frequencies of which is unknown, including those using the mode with pseudo-random tuning of the operating frequency (MFC) (see Nikitchenko V.V., Smirnov P.L. Evaluation of spatially polarized parameters of signals and noise when receiving radiation with pseudo-random tuning of the working frequency // Radio Engineering and Electronics, 1990, V. 35, No. 4, pp. 767-774; Nikitchenko VV, Smirnov PL Combined methods of noise protection (using adaptive antenna systems and pseudo-random frequency tuning) // Foreign radio electronics, No. 5, 1988, p. 24-32).

A known method of generating interference described in the book: Paly A.I. Electronic warfare. - 2nd ed., Revised. and add. - M.: Military Publishing House, 1989, p. 34, fig. 2.11. The method includes receiving signals from a radio emission source (IRI), determining signal parameters, generating a modulating voltage structure (see pages 15-17 there), modulating the pathogen signals, amplifying and broadcasting interference signals.

The disadvantage of the analogue is that it has a limited scope, since it allows you to effectively suppress communication systems that use only one carrier frequency as workers.

When suppressing sources of radio emissions using packet technology, in which the duration of radiation at each of the operating frequencies is about 5-10 ms, a situation arises when the interference is emitted at one frequency and the source of radio emissions is at another.

A known method of forming radio interference: Europatent EP 0293167 A2, published 30.11.1988, bull. 88/48, IPC H04K 3/00. This analogue includes receiving signals from a radiation source, determining the frequency and structural parameters of these signals (carrier frequency, transmission duration, moments of start and end of transmission of an adjacent “friendly transmitter”), shaping the structure of the modulating interfering voltage, modulating the exciter signals with the received voltage, amplifying and emitting broadcast interference radio signals only after the operation of the adjacent transmitter.

The disadvantage of this method is that it has a limited scope, since it allows you to suppress communication systems that work only in simplex mode of receiving and transmitting messages.

A known method of radio suppression of communication channels according to the patent of the Russian Federation No. 2104616 C1 of 02/10/1998, IPC H04K 3/00, bull. Number 4.

The method of radio suppression of communication channels is that they receive signals from a source of radio emission at all K used frequencies, k = 1, 2, ... K; determine the parameters of the received signals, form control signals of the transmission mode and the structure of the modulating voltages, modulate, amplify and emit interference signals.

The disadvantage of the analogue method is that it has a limited scope, since it only allows radio communication systems that effectively use a fairly limited number of operating frequencies to transmit data and information on the degree of their congestion is known a priori.

The closest in its technical essence is a method of creating deliberate interference, based on the formation of obstructive interference (see Paly A.I. Electronic warfare. - 2nd ed., Revised. And additional - M.: Military publishing house, 1989. - S. 47-51). The prototype method consists in the fact that the signals of the radio source are received at all K used frequencies, k = 1, 2, ...; determine the parameters of the received signals: cutoff frequencies - lower f ₁ and upper f _k , type of modulation (manipulation); generate control signals of the transmission mode and the structure of the modulating voltages, modulate, amplify and emit a broadband obstacle interference of the corresponding structure in the band ΔF = f _k -f ₁ .

The prototype method suppresses the operation of radio networks and radio directions using the frequency hopping mode. The advantage of the method in some situations should also include the fact that all radio networks with frequency hopping, sharing this frequency band ΔF are subject to suppression.

However, the prototype method has a drawback - its implementation involves significantly higher (about K times) energy costs compared to suppressed IRI. In addition, in the considered method there is no possibility of selective suppression of only a given network.

The aim of this invention is to develop a method for creating intentional interference, which provides effective radio suppression of a given radio network operating in the frequency hopping mode, while significantly reducing energy costs.

This goal is achieved by the fact that in the known method of creating intentional interference, including receiving signals from a radio source at all K used frequencies, K = 1, 2, ..., determining the parameters of the received signals: cutoff frequencies - lower f ₁ and upper f _k , type of modulation (manipulation), the formation of control signals of the transmission mode and the structure of the modulating voltage, modulation, amplification and emission of a broadband interfering signal in the band ΔF = f _k -f ₁ , determine the frequency ratings of the address group of frequencies, designed x for transmitting service information and depending on the identification code of the network of the radio emission source f ₁ , f ₂ , f ₃ , f ₄ and f ₇ , the numbers of which correspond to the time sequence of their reception, and the broadband interfering signal is emitted in the form of an interfering signal generated from the signals, simultaneously emitted at frequencies f ₁ , f ₂ , f ₃ , f ₄ and f ₇ .

In this case, the interfering signal begins to radiate in the time interval Δt _p between communication sessions in the suppressed radio network. The suppression cycle is considered complete if, after the next emission of an interfering signal of duration ΔT, there is no radio exchange in the suppressed radio network for a predetermined time interval Δt.

Thanks to a new set of essential features, by determining the frequency ratings at which the address group of the IRI frequencies is transmitted with frequency hopping, it allows radio suppression of a given radio network by generating an interference signal optimized for energy costs.

A device for the radio suppression of communication channels according to RF Pat No. 2229198, IPC H04K 3/00, publ. 05/20/2004 It contains a receiving and transmitting paths, the receiving path including an antenna, an input filter, a microwave amplifier, a first attenuator, and the transmitting path contains a transmitting antenna, a first and second microwave amplifiers, a first and second bandpass filters, a second attenuator , a low-pass filter and an intermediate-frequency amplifier with associated links. The device provides effective interference to a group of users of a cellular communication system, whose numbers are unknown, located in a limited but known area.

However, the analogue has disadvantages that limit the scope of its use by cellular communication systems. In the absence of a priori information about the operating frequency range of communication facilities with frequency hopping, the law of frequency change and the possibility of mutual synchronization, the analogue loses its functionality.

A device for creating obstruction noise, containing a receiving device, a spectrum analyzer, a control unit, a power amplifier and an interference transmitter (see Paly A.I. Electronic warfare. - M: Military Publishing House, 1989. - S. 47-51). Theoretically, the analogue is able to solve the problem of radio suppression of communication systems and means with frequency hopping in a given frequency band. However, this requires significant energy costs due to a wide band of operating frequencies ΔF IRI with frequency hopping and a significant time interval ΔT of radio suppression, which makes the technical implementation of the analogue impractical. In addition, the implementation of obstructive interference dramatically complicates electromagnetic compatibility in the area of radio suppression.

Closest to the proposed device in technical essence is a radio-frequency suppression device for radio links with frequency tuning (see Pat. RF No. 2334360, IPC H04K 3/00, G01S 7/495, published September 20, 2008. It contains a first-channel multi-channel antenna system connected in series a radio receiver, a block of analog-to-digital converters and signal selectors, a control unit, first and second spatio-temporal processing units, a control unit in series, an interference transmitter and a second antenna system, and a group and the information outputs of the signal selector are connected to the groups of information inputs of the first and second spatio-temporal processing units, the groups of information outputs of which are connected to the first and second groups of information inputs of the control unit, respectively, and the group of inputs of the interference transmitter is combined with the groups of control inputs of the first and second blocks spatially -time processing.

The prototype device suppresses short-term emissions of radio links with frequency hopping with varying signal durations. The selection of signals from a working IRI with frequency hopping of a suppressed radio line (radio network) is carried out according to spatial and energy parameters.

However, the prototype device has low efficiency. On rough terrain and in urban conditions in the VHF-UHF wave bands, the informativeness of the spatial parameter of the received signals decreases due to the multipath nature of the propagation of radio waves. The selection of IRI signals with frequency hopping located on mobile platforms (car, UAV, helicopter, etc.) further exacerbates the situation. In addition, the prototype device suppresses the radio network (radio direction) only at the time of operation of one of the selected subscribers. Radiations from other IRIs of this network are not subject to suppression due to differences in spatial Δθ, temporal Δτ and energy ΔP parameters, and, therefore, the problem is only partially solved.

The purpose of the claimed technical solutions is the development of devices to create intentional interference, which increase the efficiency of radio suppression of communication systems with frequency hopping due to the exclusion of the radio exchange of all subscribers to a given network (given networks for the third embodiment of the device).

The goal according to the first embodiment of the device is achieved by the fact that in the known device for creating intentional interference, consisting of a series-connected first antenna system, a multi-channel radio receiver, a block of analog-to-digital converters and a pulse selector, an interference transmitter and a second antenna system, the input of the second antenna system connected to the output of the interference transmitter, a unit for determining the operating frequencies, designed to find the values used in the operation, is connected in series those frequencies, a memory unit for orderly storing the nominal frequencies of the operating frequencies, taking into account the time of their reception, the unit for determining the address group of frequencies, designed to find the nominal frequencies f ₁ , f ₂ , f ₃ , f ₄ and f ₇ , and the group of information inputs of the block determining the operating frequencies is connected to the group of information outputs of the signal selector, and the group of information outputs of the unit for determining the address group of frequencies is connected to the group of control inputs of the interference transmitter. The reference frequency unit is designed to generate a high-frequency reference voltage, the output of which is connected to the reference inputs of a multi-channel radio receiver, an analog-to-digital converter unit, a signal selector, an operating frequency determination unit, an address group of frequencies, an interference transmitter and a control input of a memory unit. The group of control inputs of the signal selector is the first control bus of the device for creating intentional interference, designed to set the parameters of spatial Δθ, time Δτ and power ΔP signals for their selection from the input stream. The second group of inputs of the interference transmitter is the second control bus of the device for creating intentional interference, designed to set the suppression interval ΔT and the interval of analysis of the suppression efficiency Δt.

The goal of the second embodiment of the device is achieved by the fact that the known device for creating intentional interference, consisting of a series-connected first antenna system, a multi-channel radio receiver, a block of analog-to-digital converters and a signal selector, an interference transmitter and a second antenna system, the input of which is connected to the output of the transmitter interference, a unit for determining the operating frequencies in series for connecting the nominal values of the frequencies used in the operation, a memory unit, designed for orderly storage of the nominal values of the operating frequencies, taking into account the time of their reception, the unit for determining the address group of frequencies, designed to find the nominal frequencies f ₁ , f ₂ , f ₃ , f ₄ and f ₇ . Moreover, the group of information inputs of the unit for determining the operating frequencies is connected to the group of information outputs of the signal selector, and the group of information outputs of the unit for determining the address group of frequencies is connected to the first group of inputs of the control of the interference transmitter. A pause detection unit and a reference frequency unit for generating a high-frequency reference voltage, the output of which is connected to the reference inputs of a multi-channel radio receiver, an analog-to-digital converter unit, a signal selector, a pause detection unit, an operating frequency determination unit, an address frequency group determination unit, an interference transmitter and the control input of the memory unit. The group of control inputs of the signal selector is the first control bus of the device for creating intentional interference, designed to set the parameters of the signals for their selection from the input stream. The control unit is designed to generate control signals of the interference transmitter and the pause detection unit, the first output of which is connected to the second control input of the interference transmitter. The second group of information inputs of the control unit is the third control bus of the device for creating intentional interference, designed to set the suppression intervals ΔT in the suppression cycle T _P. The first information input of the control unit is connected to the output of the pause detection unit, designed to detect the fact that there is no radio exchange in the suppressed radio network, the first group of information inputs of which are connected to the group of outputs of the operating frequency determination unit, and the second group of information inputs is the second control bus of the device for creating intentional interference, designed to set the duration of the pauses Δt _p in the suppression cycle T _P , T _P = ΔT + Δt _p , and intervals of analysis of the effectiveness of suppression Δt. The second output of the pause detection unit is connected to the inputs of zeroing the definition of operating frequencies, the memory unit and the unit for determining the address group of frequencies, and the second output of the control unit is connected to the control input of the pause detection unit.

The goal of the third embodiment of the device is achieved by the fact that in the known device for creating intentional interference, consisting of a series-connected first antenna system, a multi-channel radio, a block of analog-to-digital converters and a signal selector, an interference transmitter and a second antenna system, the input of which is connected to the output jammer, connected in series to the unit for determining the operating frequencies, designed to find the nominal values of the frequencies used in the operation, the memory unit, rednaznachenny for orderly storage nominal operating frequency taking into account the reception time determining unit address frequency band intended for finding nominal frequencies f _1, f _2, f _3, f ₄ and f ₇ and the switch. Moreover, the group of information inputs of the operating frequency determination unit is connected to the group of information outputs of the signal selector. The m-1 interference transmitter and m-1 of the second antenna systems are introduced, the inputs of the second antenna systems being connected to the outputs of the respective interference transmitters. The first groups of control inputs of the interference transmitters are connected to the corresponding groups of information outputs of the switch. The adder, a multi-channel pause detection unit and a control unit, is designed to generate switch control signals, m interference transmitters and a multi-channel pause detection signal, the address output group of which is connected to the switch control input group, the first control outputs are connected to the corresponding second control inputs of m interference transmitters . The second group of m outputs of the control unit is connected to the group of corresponding m control inputs of the multichannel pause determination unit. The second group of information inputs of the control unit is the third control bus of the device for creating intentional interference, designed to set the suppression interval ΔT in the suppression cycle T _P. The first group of m information inputs of the control unit is connected to a group of m corresponding information outputs of a multichannel pause determination unit for determining the fact of radio exchange in each of m simultaneously suppressed radio networks. The second group of information inputs of the multi-channel pause detection unit is the second installation bus of the intentional jamming device, designed to set the duration of the suppression pause Δt _p in the suppression cycle T _P , T _P = ΔT + Δt _p , and the interval of analysis of the effectiveness of suppression Δt, Δt> Δt _p . The first group of information inputs of a multichannel pause determination unit is combined with a group of information inputs of a memory unit. The block of reference frequencies is designed to generate a high-frequency reference voltage, the output of which is connected to the reference inputs of a multi-channel radio receiver, block of analog-to-digital converters, signal selector, multi-channel block for detecting pauses, block for determining operating frequencies, block for determining the address group of frequencies, m interference transmitters and input control unit memory. The group of control inputs of the signal selector is the first control bus of the jamming device, designed to set the parameters of the signals for their selection from the input stream and the time interval T _en analysis. The output of the adder is connected to the inputs of zeroing of the unit for determining the operating frequencies, the memory unit and the unit for determining the address group of frequencies.

The listed new set of essential features due to the fact that new elements and communications are being introduced allows achieving the goal of inventions: to increase the efficiency of radio suppression of communication systems with frequency hopping due to the exclusion of radio communications of all subscribers of a given network (given networks is the third version of the device).

The claimed objects are illustrated by drawings, which show:

in FIG. 1 - the procedure for changing the address group of frequencies:

a) radio stations with frequency hopping AN / PRC-117;

b) radio stations with frequency hopping RF-5800V-MP;

in FIG. 2 is a photogram of a demodulated bit stream;

in FIG. 3 is a generalized block diagram of a first embodiment of a device for creating intentional interference;

in FIG. 4 is a flowchart of a first embodiment of an intentional jamming device;

in FIG. 5 is a generalized block diagram of a second embodiment of an intentional jamming device;

in FIG. 6 is a flowchart of a second embodiment of an intentional jamming device;

in FIG. 7 is a generalized block diagram of a third embodiment of a device for creating intentional interference;

in FIG. 8 is a generalized algorithm of the third embodiment of the device for creating intentional interference;

in FIG. 9 is a structural diagram of a signal selector;

in FIG. 10 is a block diagram of a pause detection unit;

in FIG. 11 is a structural diagram of a control unit;

in FIG. 12 is a structural diagram of a layout of a second embodiment of a device for creating intentional interference;

in FIG. 13 is a photograph of the appearance of the basic modules of the layout of the second embodiment of the device;

in FIG. 14 is a photograph of the appearance of an interference transmitter.

Over the past thirty years, radio devices have been widely used, using frequency hopping as an interference protection mode. Typical representatives of this class of IRI in the VHF range of radio waves are the products of HARRIS RF5800V-MP and others, as well as their predecessors AN / PRC-117 (see Smirnov P.L. et al. Technical characteristics and signal structure of a radio station with frequency hopping AN / PRC-117. Textbook. - L .: YOU, 1988; HARRIS: RF-5800V-MP. Http://factmil.com/board/snariazhenie/svjaz/14-13-2). As the main characteristics of these IRIs of interest, the following can be noted:

operating frequency range - 30-108 MHz;

frequency grid pitch in frequency hopping mode - 25 kHz;

speed hopping - 111 times per second;

radiation duration at the operating frequency - 8 ms (160 bits);

transient duration - 1 ms;

type of modulation - ChMn2.

The values of the nominal frequencies in the frequency hopping mode are determined by the formula:

f _k = 29.975 + n · 0.025 (MHz),

where n = 1, 2, ..., 3121; 3121 - the number of sub-frequencies in the frequency hopping mode in the range of 30-108 MHz. A standard modem with a speed of 16 kbit / s using frequency manipulation of ChMn2 is compatible with many data exchange systems of previous generations (see Fig. 1.a). In FIG. 1.a shows the sequence of transmission of service information by the HARRIS AN / PRC-117 radio station when it is tuned to a frequency of 30025 kHz. The transmission of the addressable frequency group (AHS) was carried out in the 5 MHz band. Information transfer in the frequency hopping mode in a wide frequency band (up to tens of MHz) makes the method of creating obstructive interference hardly applicable for several reasons: technical, energy, EMC, etc. The formation of "tracking" interference is also difficult because of the lack of a priori information about the frequency hopping law and short duration of radiation at used frequencies. The positive effect in the proposed method is based on the structural features of the signals of the HALRIS FALCON-II family of Iran.

The invention consists in the following. It is known (see http://fact-mil.com/board/snarjazhenie/svjaz/14-13-2) that in the FALCON-11 IRI the first 16 frequencies (according to the radiation time) in each communication session (broadcasting) ») Are intended for the transmission of official information. The frequencies with numbers 1, 2, 3, 4 and 7 (see Fig. 1.b) are repeated from session to session and depend on the network identification code (HOPSET ID) and the frequency band ΔF used. The named frequencies are replaced at a considerable time interval T. At each of the named frequencies, 160 bits of overhead information are transmitted for a standard time interval of 8 ms. Frequencies with numbers 5, 6, 8, 9, 11, 12, 14 and 15 form a repeating address group for starting the memory bandwidth generator (see Fig. 2). It was determined that it is sufficient to simultaneously generate an interfering signal at frequencies f ₁ , f ₂ , f ₃ , f ₄ and f ₇ in the interval between communication sessions to make it impossible for users of the selected radio network to enter into communication. The positive effect η achieved by reducing energy costs, which is achieved, depends on the number of frequencies K used in the work and is determined from the expression η = K / 5 and amounts to tens to hundreds of times. In addition, the external destructive effect on a given radio network is less contrast compared to the prototype. Significantly improves electromagnetic compatibility in the area of deployment of the jamming station. A similar AHS exists in the previous generation with a HARRIS frequency hopper (see Fig. 1.a).

The implementation of the method is illustrated as follows. Receive signals of a given IRI with frequency hopping in a certain frequency band (in the general case, 30-108 MHz). Reception of signals in a wide frequency band (tens of MHz) is achieved by parallel connection of several reception paths. However, the greatest technical difficulty is the operation of selecting emissions of a certain IRI from the total background in a wide frequency band ΔF. For this purpose, time-frequency features of the structure of signals with frequency hopping can be used (see RF Patents No. 2066925, No. 2107394), spatial radiation parameters (see RF Patents No. 2449473, No. 2449472, No. 2450422), signal power at the input of the receiving path (see RF Patent No. 2334360) and their combinations (see RF Patent No. 2477551).

From the entire set of operating frequencies determine the address group of frequencies in the composition of f ₁ , f ₂ , f ₃ , f ₄ and f ₇ . The latter is the frequency of radiation of a given IRI with frequency hopping frequency sequentially recorded in the proposed device from the moment it begins to work.

At the next stage, determine the type of modulation (manipulation) of the signal used: FM; FSK 16 kbps CVSD (delta modulation with adjustable slope characteristics) - voice communication; FSK 16 kbps - data exchange; 64 kbps IP option. Based on the analysis performed, a decision is made on the structure of the interfering signal. In many cases, this operation may be ruled out. In frequency hopping mode, delta modulation with adjustable slope characteristics is usually used. Therefore, it is advisable to use radiation with a similar type of modulation as an interfering signal.

The signal-noise situation in the operating frequency band ΔF is analyzed for the intensity of work in a given radio network with frequency hopping and, above all, for the presence and duration of radio silence intervals.

An optimal (in structure and radiated power) interference signal is generated at frequencies f ₁ , f ₂ , f ₃ , f ₄ and f ₇ . Studies have shown that for the violation of radio exchange, it is enough to form an interfering signal at four frequencies, for example, f ₁ , f ₂ , f ₃ and f ₄ . This circumstance can significantly simplify the implementation of the interference transmitter. The beginning of the emission of a group interfering signal should correspond to the absence of radio exchange in the suppressed radio network. Otherwise, the emitted interference signal will be ineffective (blocks an insignificant part of the operating frequencies) and will hardly affect the quality of the radio exchange. The generation of interference at the indicated frequencies at the time of radio silence makes it impossible to start and synchronize the PSP generators of the radio network subscribers with frequency hopping using service information at frequencies f ₅ , f ₆ , f ₈ , f ₉ , f ₁₁ , f ₁₂ , f ₁₄ and f ₁₅ . As a result, none of the radio stations is able to contact other network correspondents (transmits information, but no one receives it), which corresponds to the radio suppression of the radio network operating in the frequency hopping mode. The interference signal is emitted for a predetermined time interval ΔT. The latter is determined by the operator on the basis of preliminary information about the features of radio exchange in suppressed radio networks. On the basis of control listening (analysis) of duration Δt through a time interval ΔT, a decision is made on the appropriateness of further suppressing the selected radio network with frequency hopping. The Δt value is also determined by the device operator.

The first version of the device for creating intentional interference (see Fig. 3) contains a series-connected first antenna system (AC) 2, a multi-channel radio receiver (MCI) 3, a block of analog-to-digital converters (ADC) 4, a signal selector 5, a unit for determining operating frequencies ( BORCH) 6, designed to find the nominal values of the frequencies used in the work, a memory unit 7, designed to orderly store the nominal values of the operating frequencies, taking into account the time of their reception, the unit for determining the address frequency group (BOAGCH) 8, designed to be found I nominal frequencies f _1, f _2, f _3, f ₄ and f _7, jamming transmitter 9 and the second antenna system 10. The frequency reference unit 11 for generating a high-frequency reference voltage, the output of which is coupled to inputs of multichannel radio support 3, the block analog-to-digital converters 4, a signal selector 5, a unit for determining operating frequencies 6, a unit for determining an address frequency group 8, an interference transmitter 9 and a control input of a memory unit 7. The group of control input inputs of the signal selector 5 is the first control bus 1 of the device Wa deliberate interference. The second control group of the interference transmitter 9 is the second installation bus 12 of the device for creating intentional interference.

с учетом погрешности измерений ±σ. Временной параметр Δτ позволяет селектировать принимаемые сигналы по времени их излучения на рабочих частотах и по длительности переходных процессов (в общем случае - скорости ППРЧ). В процессе приема сигналов с ППРЧ наибольший интерес представляет местоположение на временной оси задних (передних) фронтов излучений, передаваемых на рабочих частотах (цикловая синхронизация) или еще более тонкая временная структура - местоположение фронтов элементарных информационных посылок (тактовая синхронизация). Энергетический параметр Р определяется уровнем принимаемых в полосе ΔF сигналов. Решение об использовании тех или иных параметров для селекции входного потока сигналов принимает оператор на основе априорной информации о сигнально-помеховой обстановке в районе развертывания устройства. Кроме того, по шине 12 задается длительность интервала подавления ΔТ и длительность контрольного прослушивания Δt, а по шине 1 - дискретность фильтрации входного потока сигналов Δf (в режиме ППРЧ необходимость в этой функции отсутствует).The operation of the first embodiment of the device for creating intentional interference (see. Fig. 3, 4) is as follows. At the preparatory stage, values of contrast parameters to block 5 are set on bus 1 (spatial Δθ, temporary Δτ, energy ΔР or their various combinations), on the basis of which the input signal stream will be selected. As Δθ, the spatial sector of the directions of arrival of the radiation with frequency hopping radiation of interest is specified (for searching for IRI). During the operation of the device (recognition), Δθ is replaced by a specific parameter value

taking into account the measurement error ± σ. The time parameter Δτ allows you to select the received signals by the time of their radiation at the operating frequencies and by the duration of the transient processes (in the general case, the frequency hopping frequency). In the process of receiving signals with frequency hopping, of greatest interest is the location on the time axis of the trailing (leading) edges of the radiation transmitted at the operating frequencies (cyclic synchronization) or an even finer temporal structure - the location of the fronts of elementary information packets (clock synchronization). The energy parameter P is determined by the level of signals received in the ΔF band. The decision to use certain parameters to select the input signal stream is made by the operator based on a priori information about the signal-noise situation in the area of deployment of the device. In addition, on bus 12, the duration of the suppression interval ΔT and the duration of the monitoring listening Δt are set, and on bus 1, the discrete filtering of the input signal stream Δf is set (in the frequency hopping mode, this function is not necessary).

In the process, the reception of radio signals is carried out using the first antenna system 2 and a multi-channel radio 3. In general, the number of reception channels corresponds to the number of antenna elements (AE). In the case when the number of AE A _i , i = 1, 2, ..., I; A≥2; more than the number of receiving channels M, M = 1, 2, ...; I>M; between units 2 and 3, an antenna switch is additionally installed.

The preferred geometry of AC 2 in the form of a ring equivalent antenna system with an odd number of AE. The orientation of the speakers can be arbitrary, its declination is subsequently taken into account according to the results of the AR collapse and control direction finding.

The functions of block 3 include the simultaneous reception of all signals in the ΔF band, for example, 60 MHz, pre-filtering and converting the received signals to an intermediate frequency to ensure the normal operation of analog-to-digital converters 4. The number of the last M corresponds to the number of receiving paths of block 3.

The received signals converted in block 4 are sent to the group of information inputs of the signal selector 5. The functions of block 5 include the selection of the received signals according to the parameters Δθ, Δτ, ΔР specified on bus 1 for their belonging to a specific IRR with frequency hopping. On the group of information outputs of block 5 there are signals of only one IRI with frequency hopping.

i-го ИРИ с ППРЧ с группы информационных выходов блок 6 поступают на группу информационных входов блока памяти 7.Next, in block 6, the nominal operating frequencies of the radiation of the analyzed source are determined. Improving the accuracy of estimating the carrier frequency is achieved by using the information embedded in all discrete samples of the power spectral density (see Pat. RF No. 2168759, G06F 17/14. Method (s) and device (s) for estimating the carrier frequency). Frequency Results

i-IRI with frequency hopping from the group of information outputs block 6 are fed to the group of information inputs of the memory block 7.

в буферную память блока 7. Накопление значений

осуществляется в течение заданного времени Т_ан, соответствующее, например, длительности передачи служебной информации. Значение Т_ан на постоянной основе хранится в блоке 7. Через названный интервал времени значения

,

,

,

,

с группы информационных выходов блока 7 поступают на группу информационных входов блока определения адресной группы частот 8.The functions of block 7 include an orderly storage of the nominal values of the operating frequencies, taking into account the order of their arrival. This operation is performed by sequentially recording all values.

to the buffer memory of block 7. Accumulation of values

is carried out for a predetermined time T _en corresponding, for example, the duration of the transmission of service information. The value of T _en on an ongoing basis is stored in block 7. After the named time interval values

,

,

,

,

from the group of information outputs of block 7 go to the group of information inputs of the block for determining the address group of frequencies 8.

,

,

,

и

в соответствии с адресами их хранения в блоке 7. Далее эти значения поступают на первую группу управляющих входов передатчика помех 9. Последний в соответствии с поступившими значениями формирует групповой помеховый сигнал, который далее поступает на вход второй антенной системы 10. Момент начала излучения помехового сигнала определяет оператор по второй шине управления 12.In block 8 determine the frequency ratings

,

,

,

and

in accordance with the addresses of their storage in block 7. Next, these values are sent to the first group of control inputs of the interference transmitter 9. The latter, in accordance with the received values, generates a group interfering signal, which then goes to the input of the second antenna system 10. The moment of the beginning of emission of the interfering signal determines operator on the second control bus 12.

Upon completion of the destructive impact cycle ΔT, the operation of the suppressed radio network is monitored. If it is absent for a period of time determined by the operator Δt, the device for creating intentional interference completes the suppression of the selected radio network and is ready for a new operation cycle. In FIG. 4 shows the algorithm of the inventive device. Using block 11 form the high-frequency reference voltage necessary for the normal operation of blocks 3, 4, 5, 6, 7, 8 and 9.

The second embodiment of the device for creating intentional interference (see Fig. 5) contains a series-connected first antenna system 2, a multi-channel radio 3, an analog-to-digital converter unit 4, a signal selector 5, an operating frequency determining unit 6, a memory unit 7, an address determining unit frequency groups 8, an interference transmitter 9 and a second antenna system 10, the group of control inputs of the signal selector 5 being the first control bus 1 of the intentional jamming device, the pause detection unit 12, and the control unit 13, the output of which is connected to the second control input of the interference transmitter 9, the second group of information inputs is the third control bus 15 of the intentional jamming device, the first information input of the control unit 13 is connected to the first output of the pause detection unit 12, the second group of information inputs of which is the second installation bus 14 of the device for creating intentional interference, and the first group of information inputs of block 12 is connected to the group of outputs of the unit for determining the operating frequencies 6, the reference block frequency 11, the output of which is connected to the reference inputs of a multi-channel radio receiver 3, an analog-to-digital converter unit 4, a signal selector 5, a pause detection unit 12, an operating frequency determination unit 6, an address frequency group determination unit 8, an interference transmitter 9 and a control input of a memory unit 7, the second output of block 12 is connected to the zeroing inputs of the operating frequency determination unit 6, the memory unit 7 and the determination unit of the address frequency group 8, and the second output of the control unit 13 is connected to the control input of the pause detection unit 12 .

The disadvantage of the first version of the device for creating intentional interference is that it requires the participation of the operator in deciding on the beginning and completion of the suppression of the radio network, which includes the i-th IRI. This disadvantage is eliminated in the second embodiment (see Figs. 5 and 6). For this purpose, the pause detection unit 12 and the control unit 13 are additionally introduced into the device according to the first embodiment (see Fig. 3). In this case, the purpose and functioning of the corresponding units, as well as their implementation, coincide in the first and second versions of the devices.

The operation algorithm of the pause detection unit 12 is based on the features of the operation of communication devices with frequency hopping: in the information transfer mode, the operating frequencies are changed (for example, at a speed of 111 times / s). Regular (for example, after 9 ms) the appearance of the signal at the output of the selector 5 (see Fig. 5) indicates the operation of a given IRI. Given this time interval Δt _p (which can be increased by two to three times in case of “missing a target"), it becomes possible to determine the moment of termination of the transmission of information. A message about a pause in the IRI from the output of block 12 is received at the information input of the control unit 13.

The function of the latter includes generating a control signal to the interference transmitter 9, allowing the formation of a group interfering signal at the frequencies indicated by block 8. The duration of the control signal of block 13 is ΔT. The latter is set on the third installation bus 15 before starting work. At this time interval, the input of block 9 is blocked to eliminate malfunctioning situations by zeroing the contents of blocks 6, 7, and 8 by a pulse generated at the second output of the pause detection block 12.

After the time interval ΔT is completed, the signal at the output of block 13 is removed, and the interference transmitter 9 goes into standby mode. If the suppressed radio network does not work for more than a predetermined time interval Δt (set in block 12 before starting work on the installation bus 14, ΔT> Δt, Δt> Δt _p ), the intentional jamming device is ready for a new operation cycle. The operation algorithm of the second embodiment of the device for creating intentional interference is shown in FIG. 6. The value Δt _{p is} also set via bus 14 at the preparatory stage and is stored in block 12. Synchronization of the operation of the device elements (see Fig. 5) is provided by pulses of block 11.

The third version of the device (see Figs. 7 and 8) comprises a first antenna system 2 connected in series, a multi-channel radio receiver 3, an analog-to-digital device unit 4, a signal selector 5, an operating frequency determination unit 6, a memory unit 7, an address frequency group determination unit 8 and the switch 16, m of the interference transmitters 9.1-9.m and m of the second antenna systems 10.1-10.m, the inputs of which are connected to the outputs of the corresponding interference transmitters 9.1-9.m, the first groups of control inputs of which are connected to the corresponding groups of information outputs of the switch RA 16, adder 17, a multi-channel pause detection unit (MBOP) 18 and a control unit 19, the address output group of which is connected to a group of control inputs of the switch 16, m of the first control outputs are connected to the corresponding second control inputs of m interference transmitters 9.1-9.m, the second group of information inputs of block 19 is the third control bus 15 of the device for creating intentional interference, and the first group of m information inputs of block 19 is connected to a group of m corresponding information outputs of the multi-channel block op breaks 18, the second group of information inputs of which is the second installation bus 14 of the device for creating intentional interference, and the first group of information inputs of block 18 is combined with the group of information inputs of memory block 7, the block of reference frequencies 11, the output of which is connected to the reference inputs of the multi-channel radio 3, analog-to-digital conversion unit 4, signal selector 5, multi-channel pause detection unit 18, working frequency determination unit 6, address frequency group determination unit 8, m transmitter interference 9.1-9.m and the control input of the memory unit 7, the group of control inputs of the signal selector 5 is the first control bus of the device for creating intentional interference, the second group of m outputs of the control unit 19 is connected to the group of corresponding m control inputs of the multi-channel pause detection unit 18, the second group of outputs of which is connected to the group of inputs of the adder 17, the output of which is connected to the inputs of zeroing of the unit for determining the operating frequencies 6, the memory unit 7 and the unit for determining the address group of frequencies 8.

The third embodiment of the device for creating intentional interference (see Fig. 7) is aimed at a more efficient use of the main (from the point of view of complexity and cost) units of the prototype device and the first two proposed device options: multi-channel radio 3, ADC 4, pulse selector 5, as well as blocks 6, 7, and 8, respectively. In the time interval ΔT of interference generation in the first and second embodiments of the device, they do not participate in the operation. Moreover, the larger the ΔT interval, the lower the efficiency of the device. In this regard, it is proposed to perform an analysis of the operation of other radio networks with frequency hopping and their simultaneous suppression in the named time interval. To this end, an adder 17, a multi-channel pause detection unit 18, a control unit 19, a switch 16, m-1 interference transmitters 9.2-9.m and m-1 of the second antenna are additionally introduced into the first embodiment of the device for creating intentional interference (see Fig. 3) systems 10.2-10.m (see Fig. 7).

The preparatory phase of the third and second embodiments of the device completely coincide. Define and enter into the appropriate blocks the parameters that determine the operating modes of the device: Δθ, Δτ, ΔP, T _en , ΔT, Δt, Δt _P.

,

,

,

и

записываются в буферную память блока 9.1 под воздействием очередного импульса, сформированного блоком 11. Передатчик помех 9.1 настраивается на эти частоты и находится в готовности к излучению на них помехового сигнала. Формирование сигнала, разрешающего излучение помехи на адресной группе частот первого ИРИ с ППРЧ осуществляется с помощью блоков 18 и 19. При обнаружении паузы длительностью Δt_p в работе абонентов первым каналом блока 18 формируется управляющий сигнал, поступающий на первую группу информационных входов блока управления 19. В результате на первом выходе последнего формируется сигнал длительностью ΔТ, поступающий на второй управляющий вход передатчика помех 9.1. Блок 9.1 совместно с 10.1 приступает к излучению помехового сигнала длительностью ΔT. Одновременно передним фронтом управляющего сигнала блока 19, проходящего через сумматор 17, обнуляется содержимое блоков 6-8. В результате устройство готово к новому циклу работы, а значения адресной группы частот первого обнаруженного ИРИ с ППРЧ сохраняются в буферной памяти блока 9.1.In the process of detecting the radiation of the first specified IRI with frequency hopping and determining its address group of frequencies is carried out using blocks 3-8. In the initial state, the block 19 generates a control signal for the switch 16, ensuring the connection of the group of information outputs of the block 8 to the first group of control inputs of the first interference transmitter 9.1 As a result of the frequency values

,

,

,

and

are recorded in the buffer memory of block 9.1 under the influence of the next pulse generated by block 11. The interference transmitter 9.1 is tuned to these frequencies and is ready to radiate an interference signal to them. The formation of a signal that allows noise emission at the address group of frequencies of the first IRI with frequency hopping is performed using blocks 18 and 19. When a pause of duration Δt _p is detected in the work of subscribers, the first channel of block 18 generates a control signal received at the first group of information inputs of control unit 19. V As a result, at the first output of the latter, a signal of duration ΔТ is generated, which arrives at the second control input of the interference transmitter 9.1. Block 9.1 together with 10.1 proceeds to the emission of an interfering signal of duration ΔT. At the same time, the leading edge of the control signal of the block 19, passing through the adder 17, nullifies the contents of blocks 6-8. As a result, the device is ready for a new cycle of operation, and the values of the address group of frequencies of the first detected IRI with frequency hopping are stored in the buffer memory of block 9.1.

,

,

,

и

. Одновременно с помощью блоков 18 и 19 формируется сигнал управления для коммутатора 16. В результате значения

,

,

,.

и

через блок 16 поступают на первую группу управляющих входов второго передатчика помех 9.2. Вторым каналом блока 18 определяется пауза в работе абонентов второй радиосети. С ее наступлением на выходе второго канала блока 18 формируют управляющий сигнал, поступающий на соответствующий (второй) вход первой группы из m информационных выходов блока управления 19. В результате блок 19 на втором выходе управления формирует сигнал длительностью ΔT. Последний поступает на второй управляющий вход второго передатчика помех 9.2. Блок 9.2 и 10.2 в течение интервала ΔТ излучают групповой помеховый сигнал. Одновременно передним фронтом названного сигнала управления через блок 17 обнуляется содержимое блоков 6, 7 и 8. Устройство готово к обработке следующих излучений с ППРЧ. По вышеописанному алгоритму осуществляется подавление всех последующих обнаруженных радиосетей с ППРЧ. После завершения интервала подавления ΔT в первом тракте формирования помех (блоки 9.1 и 10.1) на первом управляющем входе блока 19 завершается действие разрешающего сигнала. Первый канал блока 18 приступает к анализу наличия излучений подавляемой радиосети. Если в течение интервала времени Δt в подавляемой радиосети работа не отмечается, принимается решение о завершении работы по ее подавлению, а адресная группа вновь обнаруженного ИРИ с ППРЧ по описанному выше алгоритму записывается в буферную память первого передатчика помех 9.1.When detecting signals of the next specified IRI with frequency hopping units 6-8, an address frequency group is determined:

,

,

,

and

. At the same time, using the blocks 18 and 19, a control signal is generated for the switch 16. As a result of the value

,

,

,.

and

through block 16 enter the first group of control inputs of the second interference transmitter 9.2. The second channel of block 18 determines the pause in the work of subscribers of the second radio network. With its occurrence, at the output of the second channel of block 18, a control signal is generated, which arrives at the corresponding (second) input of the first group of m information outputs of control unit 19. As a result, block 19 generates a signal of duration ΔT at the second control output. The latter enters the second control input of the second interference transmitter 9.2. Block 9.2 and 10.2 during the interval ΔТ emit a group interfering signal. At the same time, the leading edge of the control signal through the block 17 resets the contents of blocks 6, 7 and 8. The device is ready to process the next emissions from the frequency hopping. According to the above-described algorithm, all subsequent detected radio networks with frequency hopping are suppressed. After the suppression interval ΔT is completed in the first interference path (blocks 9.1 and 10.1), the action of the enable signal is completed at the first control input of block 19. The first channel of block 18 starts analyzing the presence of radiation from the suppressed radio network. If during the time interval Δt no operation is noted in the suppressed radio network, a decision is made to complete the operation to suppress it, and the address group of the newly detected IRI with frequency hopping according to the algorithm described above is written to the buffer memory of the first interference transmitter 9.1.

Otherwise, when the operation of the suppressed radio network is resumed after a time interval smaller than Δt by the first channel of block 18, an analysis is performed to detect another pause in its operation. Next, using the blocks 18 and 19, a control signal of duration ΔТ is generated, which arrives at the second control input of the transmitter 9.1. As a result, during the next ΔT interval, the first radio network is suppressed. In this case, the values of the address group of frequencies of the suppressed radio network are stored in the buffer memory of block 9.1. Their replacement is carried out only if the decision is made by block 19 to complete the operation of suppressing and detecting the next IRI with frequency hopping (when the next values of the address group of frequencies come from the output of the switch 16 to the first group of control inputs of block 9.1). All operations are synchronized by the pulses generated by block 11. It should be noted that in the third embodiment of the device, it is assumed that the interference transmitters 9.1-9.m and second antenna systems 10.1-10.m are spatially removed from the receiving-analytical part of the device (blocks 2-8, 11, 16, 17-19), as well as their mutual diversity.

The implementation of all three variants of the device for creating intentional interference does not cause difficulties. Multichannel radio 3 is designed to simultaneously receive signals in a wide frequency band, for example 30 ... 108 MHz, and convert them to an intermediate frequency, for example, 90 MHz. Its implementation is known and does not cause difficulties (see Fomin NN, Bug NN and others. Radio receivers: Textbook for high schools. - 3rd ed., Stereotype. - M .: Hot line - Telecom, 2007 - P. 520; Golovin OV Radio receivers. - M .: Hot line - Telecom, 2004) The implementation of multichannel devices for all three device variants is identical.

The block of analog-to-digital converters 4 can be implemented on serial products manufactured by ZETlab Studio (http://www.zetlab.ru/catalog/). Other ADC implementation options are also possible (see "Professional Equipment and Technologies" (http://www.protehnology.ru/page/about)).

The signal selector 5 is designed to highlight the radiation of a given IRI with frequency hopping from the combination of the background in a wide frequency band ΔF. In FIG. Figure 9 shows a block diagram of a signal selection block 5, based on the use of the most informative parameters of the analyzed radiation: the time-frequency features of the structure of signals with frequency hopping, their spatial and power parameters. The signal selector 5 contains (see Fig. 9) a memory block 20, a decoder 21, a first switch 22, a spatial selector 24 and a second switch 28, the group of information outputs of which is a group of information outputs of the signal selector 5, a group of information inputs of a block memory 20 is a group of control inputs of the signal selector 5, the second group of inputs of the first switch 22 is a group of information inputs of the signal selector 5, the second group of information outputs of the first comm The ator 22 is connected to the troupe of information inputs of the selector for spectral power 23, the fourth group of information outputs of the first switch 22 is connected to the group of information inputs of the selector for spatial power parameters 26, the group of information outputs of which are connected to the third group of information inputs of the second switch 28, the second group of information the inputs of which are connected to the group of information outputs of the selector for spectral power 26, the fifth group of information outputs of the first comm Ator 22 is combined with a group of information inputs of the selector by spatio-temporal parameters 27, a group of information outputs of which is connected to a fourth group of information inputs of the second switch 28, a third group of information outputs of the first switch 22 is connected with a group of information inputs of the selector by time parameters 25, the group of outputs of which connected to the fifth group of information inputs of the second switch 28, the control input of which is connected to the output of the decoder 21, and the synchronization input is cheap the ifrarator 21 is combined with the synchronization inputs of the selector for spectral power 23, the selector for spatial parameters 24, the selector for temporal parameters 25, the selector for spatio-power parameters 26, the selector for spatio-temporal parameters 27, the clock input of the memory unit 20 is the reference input of the selector signals 5.

The operation of the signal selector 5 is as follows. At the preparatory stage, on the first installation bus 1, the operator sets the parameter (s) by which the input signal stream should be selected. The latter is recorded in the memory unit 20. With the arrival of the next clock pulse of the block 11, the contents of the block 20 go to the group of information inputs of the decoder 21. In this case, the contents of the block 20 are stored for the entire period of operation of the device until new data is received from the operator via bus 1. In the function of block 21 includes the conversion of the data received from block 20 to the form necessary for the normal operation of the first and second switches 22 and 28. The converted data from the output of block 21 goes to the group of control inputs of the first switch 24. the group of information inputs of the latter is present adopted by block 3 in the frequency band ΔF and converted to digital form in block 4, the total signal stream. The functions of block 22 include the direction (switching) of this stream to the input of the selector specified by the operator. The latter are the selector for spectral power 23, the selector for spatial parameters 24, the selector for temporal parameters 25 and their combinations: the selector for spatial-power parameters 26 and the selector for spatio-temporal parameters 27. Other combinations of parameters are possible for their use in selectors. In FIG. 9 are reflected most commonly used among them. The groups of information outputs of all of the above selectors are connected to the corresponding groups of information inputs of the second switch 28. The group of control inputs of block 28 is combined with the group of control inputs of the first switch 22. As a result, signals from only the selector specified by the operator pass to the output of block 28. The synchronization of the elements of block 5 is provided by the pulses of block 11. The function of the switch 28 can also be performed by an adder.

The implementation of blocks 20, 21, 22, and 28 is known and does not cause difficulties (see Large Integrated Circuits of Storage Devices: Reference Book / A.Yu. Gordonov, N.V. Bekin, V.V. Tsyrkin et al .; Ed. A .U. Gordonova. - M.: Radio and Communications, 1990. - 288 p.).

The implementation of the selector for spectral power 23 is known and does not cause difficulties. In the book. Zalmanzon L.A. Fourier, Walsh, Harra transforms and their application in management, communications and other fields. - M .: Nauka, 1989 .-- 496 p. on pages 182-189 the procedure for measuring the spectral power of received signals is described in detail. As a possible implementation of block 23, the device of Pat. RF №2137151. In the named device there is no need for discretization of the received signals, it is performed by block 4.

The implementation of the selector in spatial parameters 24 is known and does not cause difficulties. Can be implemented in accordance with Pat. RF №2449473. The selector 24, implemented on the basis of the "Multi-channel adaptive radio receiving device" provides noise-protective isolation of signals from one IRI with frequency hopping due to the optimization of directional properties of the radiation pattern of the first antenna system 2. This implementation of block 24 is expedient for the first (Fig. 3) and second (Fig. 5 ) embodiments of the device for creating intentional interference. In addition, block 24 may be made in accordance with US Pat. RF 2477551. Simultaneous spatial selection of signals from several IRI with frequency hopping is achieved by block 24 when it is implemented on the basis of Pat. RF №2449472 (the third embodiment of the device). In this case, the signal-to-noise ratio is also further improved by adaptively processing the received signals.

The implementation of the selector in time parameters 25 is known and does not cause difficulties. As the time parameters in the work of the selectors, the moments of the beginning (end) of radiation of radio means with frequency hopping at frequency positions (conventionally called cyclic synchronization) and a finer structure - the fronts of elementary information transmissions (clock synchronization) are usually used. The selector 25, providing the selection of the signals of one IRI with frequency hopping (the first and second version of the device) can be implemented similarly to a multi-channel adaptive radio receiving device according to Pat. RF 2107394. To ensure the simultaneous separation of signals from several IRI with frequency hopping, this operation can be implemented using a device based on Pat. RF 2066925 (third embodiment of a device for creating intentional interference).

The spatio-temporal selector 27 is expediently implemented using the device of Pat. RF 2450422, providing simultaneous noise-tolerant separation of signals from several IRI with frequency hopping. It should be noted that in the case of additional sector setting of spatial parameters on bus 1 (θ _min , θ _max ), in the selectors 24 and 27, blocks for comparing the measured values of θ _ism with the values of θ _min and θ _{max are entered} for decision making.

The selector for spatial power parameters 26 can be implemented similarly to the corresponding block 5.1 of the prototype device according to Pat. RF 2334360. Synchronization of all elements of the signal selector 5 is provided by pulses of the block of reference frequencies 11.

The implementation of the unit for determining the operating frequencies 6 is known and does not cause difficulties. Can be implemented in accordance with Pat. RF 2303786 “Method and device for estimating the carrier frequency of a signal”, which implements an estimate in the Vilenkin-Chrestenson bases and ensures high measurement accuracy. The difference in the implementation aspect is that there is no need for an analog-to-digital converter 1 in FIG. 2 (Pat RF 2303786), since this operation is performed by block 4. Other variants of block 6 are known (see Pat RF 2168759), allowing to realize its functions.

The memory unit 7 is designed for orderly storage of the nominal frequencies of a given IRI with frequency hopping, taking into account the time of receipt. The addresses of the memory cells of block 7 correspond to the order of occurrence of the radiation of radio stations with frequency hopping at frequency positions. Block 7 is easily implemented on reprogrammable read-only memory devices (KM 1609 series) and TTL-series diskette elements (see Large Integrated Circuits of Storage Devices: Reference Book / A.Yu. Gordonov et al .; Edited by A.Yu. Gordonov. - M .: Radio and communications, 1990. - 288 p.).

The unit for determining the address group of frequencies 8 is designed to find the nominal values of frequencies f ₁ , f ₂ , f ₃ , f ₄ and f ₇ from the set of data stored in block 7. Implementation of block 8 does not cause difficulties (see B. Shevkoplyas Microprocessor structures Engineering Solutions: Handbook. - 2nd ed. Revised and enlarged. - M.: Radio and Communications, 1990. - 512 p.).

Interference transmitter 9 (9.1-9.m) can be implemented using a MINI-CIRCUITS frequency synthesizer connected in series (see Yu. Nikitin. “MINI-CIRCUITS voltage-controlled oscillators for RF synthesizers” // Components and Technologies, No. 3, 2003) and a power amplifier of the same company ZHL-100W-GAN +.

As elements of the second antenna system 10 (10.1-10.m), omnidirectional antenna elements can be used: whip of coordinated length, disc cones, symmetric polyconic antenna (see Pat. RF 2486642), etc. In the case of setting the suppression sector for this purpose, find application log-periodic combined antenna (see Pat. RF 2427946). In the third embodiment of the device for creating intentional interference, the interference transmitters 9.1-9.m and the second antenna systems 10.1-10.m are expediently spatially separated by a distance of several wavelengths.

The block of reference frequencies 11 are identical, designed to form a highly stable signal (meander) with a frequency of 120 MHz. Block 11 contains a reference generator that provides the formation of a highly stable analog signal with a frequency of 10 MHz (performed using a DDS synthesizer). From the output of the synthesizer, a signal with a level of - 4 dBm is fed to an amplifier with a gain of 14 dB and then to a square wave driver with a frequency of 120 MHz. It is advisable to manufacture the latter on an ADCMP 551 comparator from Analog Devices (http://www.analog.com/static/imported-files/datasheets/ADCMP551.pdf).

Block 12 is designed to detect pauses in the operation of the radio network with frequency hopping, as well as the fact of the end of its work. The pause detection unit 12 (see FIG. 10) contains a pulse shaper 29 connected in series, a pulse counter 31 and a decision block 32, the first output of which is the first output of the block 12, the second output of the block 32 is the second output of the pause detection unit 12, and the second the group of information inputs of block 32 is the second installation bus 14 of the device for creating intentional interference, and a pulse divider 30, the output of which is connected to the counting input of the pulse counter 31, the information input of block 30 is the reference input of the block pause detection 12, the group of information inputs of the pulse shaper 29 is the first group of information inputs of the pause detection unit 12, and the first control input of the decision block 32 is connected to the input of zeroing the pulse counter 31 and the output of block 29, the second control input of block 32 is the control input of the detection block pauses 12.

The operation of the pause detection unit 12 is as follows (see Fig. 10). Before starting work, the decision block 32 on the bus 14 sets the values of the time intervals Δt and Δt _p. The value of Δt _{p is} determined on the basis of the technical characteristics of the suppressed IRI with frequency hopping (rate of change of operating frequencies). With IRI suppression, FALCON II Δt _p can be 10-20 ms. In the process of operation of the device, unit 5 extracts signals of a given IRI with frequency hopping. At the output of block 6, a sequence of nominal values of the frequencies used in the work is formed. The latter enters the group of information inputs of the pulse shaper 29. The unit's task is to generate a single pulse at its output at the time of the arrival of the next frequency value f _i ИРИ with frequency hopping. The input pulses of the decoder 30 receive the reference pulses of block 11. Their repetition rate is 120 MHz. The function of block 30 includes increasing the pulse repetition period to provide a smaller required capacity of the pulse counter 31. The division coefficient in block 30 can be 1000/1. The pulses from the output of block 30 are fed to the counting input of the pulse counter 31. The last is filled until the moment the pulse arrives from the output of the pulse shaper 29 to its zero input. With this pulse, the contents of the counter 31 are rewritten into the decision block 32 and reset. The contents of the counter is equivalent to the time interval between adjacent IRI radiation with frequency hopping at operating frequencies. In the decision block 32, the obtained value of t _{ISM is} compared with the threshold Δt _p . This process continues until the time t _ISM > Δt _p . Exceeding Δt _p indicates a pause in the work of the analyzed radio network. As a result, a pulse is generated at the first output of block 32, which arrives at the first input of control unit 13.

After the suppression cycle of duration ΔT is completed by block 13, a control signal (pulse) is generated that is fed to the second control input of decision block 32. With this signal, block 32 is put into the analysis mode of the effectiveness of the generated interference, the analysis interval is increased to Δt. If in the time interval Δt _p is noted in the operation of the IRI with frequency hopping, block 12 operates according to the algorithm described above, and the suppression of the radio network continues. Otherwise, the analysis is performed for Δt, Δt> Δt _p . If there is no work in the radio network for a predetermined time interval Δt, a decision is made to complete its suppression, a pulse is generated at the second output of block 32, which arrives at the zeroing inputs of blocks 6, 7, and 8. The device is ready for a new operation cycle. When radiation appears in the time interval Δt> t _meas > Δt _p , the radio network is suppressed with frequency hopping (the next pulse is generated at the first output of block 32).

The implementation of all the elements of block 12 is known and does not cause difficulties; they can be performed on the elementary element base of TTL-series microcircuits. The decision block contains a buffer memory block, two decoders, an RS trigger and an adder.

The control unit 13 is designed to generate a control signal to a unit 9 of duration ΔT for generating an interfering signal (pulse of unit amplitude and duration ΔT). In addition, at the second output of block 13, a control signal is generated to transfer block 12 to the mode of analysis of the effectiveness of the suppression procedure. The control unit 13 contains a first 33 and a second 34 pulse shapers and a memory unit 35, respectively. Before starting operation, the value of the duration of the suppression interval ΔT received via the device bus 15 is recorded in the memory unit 35. This value determines the duration of the pulse generated by block 34. The beginning of the formation of this pulse is determined by the moment the signal arrives from the first output of block 12. The trailing edge of the pulse generated by block 34 is used by block 33 to generate the second control signal (pulse). The latter is fed to the control input of block 12.

The multi-channel pause detection unit 18 contains m parallel connected identical pause detection units (similar to block 12, Fig. 10), the first groups of information inputs of which are connected to the corresponding groups of outputs of the switch. The information group of inputs of the latter is the first group of information inputs of block 18. To control the switch, a series-connected adder and a counter are introduced, the outputs of which are connected to the group of control inputs of the switch. The first outputs m of the pause determination blocks are connected to the corresponding inputs of the adder. After a pause is detected in the ith channel, an impulse is generated at its first output, which is necessary for block 19 to form a suppression command. At the same time, it enters the input of the adder and then to the counting input of the pulse counter, increasing its content.

The control unit 19 contains m identical channels (similar to blocks 13, Fig. 5) and an encoder. Each of the channels of block 19 is connected to the corresponding channel of block 18. The purpose of the encoder is to convert the channel number of block 19 into the code combination needed to control the switch 16. For example, the third control channel, using block 16, connects the address troupe of frequencies to the third jamming transmitter.

In addition, in the signal selector 5 for the third embodiment of the device, an additional timer is introduced into the switch 22, which provides a time limit on the analysis on the interval T _en . This operation is necessary to optimize the time spent on the detection and simultaneous suppression of multiple RF networks with frequency hopping.

In the limited liability company “Special Technological Center”, St. Petersburg, the prototyping of the proposed devices that have passed successful tests has been performed. To increase the speed of the device, reduce the overall dimensions and power consumption, increase its reliability, it is advisable to implement blocks 4, 5, 6, 7, 8, as well as 12, 13, 16, and 17 on the digital signal processor DSP TMS320c6455 (see http: / /www.compel.ru) in conjunction with the Virtex XC4SX35 FPGA chip (see FIGS. 12 and 13) and received the name “Digital Signal Processing Module” UIES 467415.004. In this case, all processing is performed digitally. As a multi-channel radio 3, the “Reception and Conversion Module” was used, developed by STTs LLC and received the name UIES 468151.013. The latter is a three-channel radio receiver with a bandwidth of 20 MHz for each channel. Provides simultaneous reception of signals in the 60 MHz band. As the interference transmitter 9 (9.1-9.m), the “Transmission frequency conversion module" (analog-to-digital transmitter) was used, which received the name UIES 464.217.001. The appearance of the interference transmitter is shown in FIG. 14. It is a frequency synthesizer (developed by STTs LLC) and a MINI-CIRCUITS ZHL-100W-GAN + power amplifier. As a block of reference frequencies 11, the “Module of 10/120 MHz frequency generators” was used, which received the name UIES 467871.006, developed by STTs LLC (see Figs. 12 and 13). The device is controlled from the "Control signal distribution board" UIES 469331.001. The digital signal processing module operates in accordance with the algorithm shown in FIG. 6. Using a model whose structural diagram is shown in FIG. 12, a second embodiment of an intentional jamming device is implemented. Field tests showed that the developed modules provide simultaneous effective control of the operation of four interference transmitters, which corresponds to the implementation of the third version of the device. In this case, the digital signal processing module operates in accordance with the algorithm shown in FIG. 8.

Thus, the experimental verification confirmed the possibility of achieving a technical result.

Claims (6)

1. The method of creating deliberate interference, which consists in the fact that the signals of the radio source are received at all K used frequencies, K = 1, 2, the parameters of the received signals are determined: cutoff frequencies - lower f ₁ and upper f _k , type of modulation (manipulation), generate control signals for the transmission mode and the structure of the modulating voltages, modulate, amplify and emit a broadband interfering signal in the band ΔF _p = f _k -f ₁ , characterized in that the frequency values of the address group of frequencies, pr designed to transmit service information and depending on the identification code of the network of the radio emission source f ₁ , f ₂ , f ₃ , f ₄ and f ₇ , the numbers of which correspond to the time sequence of their reception, and the broadband interference signal is emitted in the form of an interference signal formed from signals, simultaneously emitted at frequencies f ₁ , f ₂ , f ₃ , f ₄ and f ₇ . 2. The method according to p. 1, characterized in that the interfering signal begins to emit in the time interval Δt _p between communication sessions in the suppressed radio network. 3. The method according to p. 1, characterized in that the suppression cycle is completed if, after the next radiation of an interfering signal of duration ΔT, there is no radio exchange in the suppressed radio network for a predetermined time interval Δt. 4. A device for creating intentional interference, comprising a series-connected first antenna system, a multi-channel radio, a block of analog-to-digital converters and a signal selector, an interference transmitter and a second antenna system, the input of which is connected to the output of the interference transmitter, characterized in that a series-connected block is additionally introduced determining the operating frequencies, designed to find the nominal values of the frequencies used in the work, a memory unit designed for orderly storage of nominal in operating frequencies, taking into account the time of their reception, the unit for determining the address group of frequencies, designed to find the nominal frequencies f ₁ , f ₂ , f ₃ , f ₄ and f ₇ , and the group of information inputs of the unit for determining the operating frequencies is connected to the group of information outputs of the signal selector and the group of information outputs of the unit for determining the address group of frequencies is connected to the first group of inputs of the control of the interference transmitter, the block of reference frequencies, designed to generate a high-frequency reference voltage, the output of which is connected with the reference inputs of a multi-channel radio receiver, an analog-to-digital converter unit, a signal selector, an operating frequency determination unit, an address frequency group determination unit, an interference transmitter and a memory unit control input, the signal selector control input group is the first control bus of the intentional jamming device, intended for assignment of spatial Δθ, temporary Δτ and power ΔР parameters of signals for their selection from the input stream, and the second group of control of the interference transmitter is the second installation bus of the device for creating intentional interference, designed to set the duration of the destructive effect ΔT and the interval of analysis of the suppression efficiency Δt. 5. A device for creating intentional interference, containing a series-connected first antenna system, a multi-channel radio, a block of analog-to-digital converters and a signal selector, an interference transmitter and a second antenna system, the input of which is connected to the output of the interference transmitter, characterized in that a series-connected block is additionally introduced determining operating frequencies, designed to find the nominal values of the frequencies used in the work, a memory unit designed for orderly storage s of operating frequencies, taking into account the time of their reception, a unit for determining the address group of frequencies, designed to find the nominal values of frequencies f ₁ , f ₂ , f ₃ , f ₄ and f ₇ , and the group of information inputs of the unit for determining operating frequencies is connected to the group of information outputs of the signal selector and the group of information outputs of the block for determining the address group of frequencies is connected to the first group of inputs of the control of the interference transmitter, the block of reference frequencies, designed to generate a high-frequency reference voltage, the output of which is connected n with reference inputs of a multi-channel radio receiver, analog-to-digital converters unit, signal selector, pause detection unit, working frequency determination unit, address frequency group determination unit, interference transmitter and memory unit control input, the signal selector control input group is the first control bus of the creation device deliberate interference, designed to set the parameters of the signals for their selection from the input stream, the pause detection unit and the control unit, designed to form Bani transmitter interference and detection unit control signals pauses, a first output connected to the second input jammer control, second group of information inputs of the control unit is the third bus create jamming control device, intended for setting intervals ΔT suppression loop suppress T _P, the first information the input of the control unit is connected to the first output of the pause detection unit, designed to detect the fact of the absence of radio exchange in the suppressed radio network, the first group of information inputs of which is connected to the group of outputs of the operating frequency determination unit, and the second group of information inputs is the second control bus of the intentional jamming device, designed to set the duration of pauses Δt _p in the suppression cycle T _P , T _P = ΔT + Δt _p , and the intervals of the analysis of the suppression efficiency Δt, the second output of the pause detection unit is connected to the zeroing inputs of the operating frequency determination unit, the memory unit, and the second output of the control unit is connected to the control input of the appearance of pauses. 6. A device for creating intentional interference, comprising a series-connected first antenna system, a multi-channel radio, a block of analog-to-digital converters and a signal selector, an interference transmitter and a second antenna system, the input of which is connected to the output of the interference transmitter, characterized in that a series-connected block is additionally introduced determining the operating frequencies, designed to find the nominal values of the frequencies used in the work, a memory unit designed for orderly storage of nominal in operating frequencies, taking into account the time of their reception, the unit for determining the address group of frequencies, designed to find the nominal frequencies f ₁ , f ₂ , f ₃ , f ₄ and f ₇ , and a switch, and the group of information inputs of the unit for determining operating frequencies is connected to the group of information the outputs of the signal selector, m-1 interference transmitters and m-1 second antenna systems, and the inputs of the second antenna systems are connected to the outputs of the respective interference transmitters, the first groups of control inputs of which are connected to the corresponding groups of information outputs switchboard combiner, adder, multi-channel pause detection unit and control unit for generating switch control signals, m interference transmitters and multi-channel pause detection unit, the address group of outputs of which is connected to the group of control inputs of the switch, m of the first control outputs are connected to the corresponding second control inputs m jammers, a second group of m outputs of the control unit is connected to a group of corresponding m control inputs of a multi-channel determination unit pauses, the second group of information inputs of the control unit is the third control bus of the intentional jamming device, designed to set the suppression duration ΔТ in the suppression cycle T _P , and the first group of m information inputs is connected to a group of m corresponding information outputs of the multi-channel pause detection unit to determine the fact that there is no radio exchange in each of m simultaneously suppressed radio networks, the second group of information inputs of which is the second stanovochnoy bus create jamming device, designed to set the duration of the pause Δt _p loop suppress T _n, T _n = ΔT + Δt _p, and efficiency of the analysis interval suppression Δt, Δt> Δt _p, the first group of information inputs of multichannel detection unit pauses combined with a group of information inputs of the memory unit, and a group of m second outputs is connected to a group of m corresponding inputs of the adder, a reference frequency unit for generating a high-frequency reference voltage, the output of which is connected to the reference inputs of a multi-channel radio receiver, an analog-to-digital converter unit, a signal selector, a multi-channel pause detection unit, an operating frequency determination unit, an address frequency group determination unit, m interference transmitters and a memory unit control input, a group of signal selector control inputs is the first control bus of the creation device jamming signals intended for setting parameters for the selection of the input stream and perform analysis time interval T _an and vyho an adder coupled to the reset inputs of the operating frequency determination unit, storage unit and the address determination unit frequency band.

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