Device for the formation of reciprocal interference radar stations

 

The invention relates to the field of radio and can be used for the jamming pulse-Doppler and pulsed radar (radar). The technical result is the creation of interference with the increased spectral density of the energy potential by improving the accuracy of the carrier frequency of the probing signal RLS, the degree of conformity of parameters of received signals parameters subject to suppression radar and improve timing signal interference and radar. For this part of the device with corresponding connections are introduced, the selector signal pulses, two electronically controlled matrix of receiver and transmitter NxM, encoders and decoders, channel, two sets of generators of the reference frequency of the receiver and transmitter, M frequency receiver channels, each comprising connected in series mixer subsystem frequency signal, the intermediate frequency amplifier, a frequency discriminator and an analog-to-digital Converter, the N frequency channels of the transmitter, including each connected in series generator synthesized frequency mixer subsystem of the play is also a device for generation of modulating signals comprising series-connected noise generator and pulse generator. 1 Il.

The invention relates to electrical engineering and can be used for the jamming pulse-Doppler and pulsed radar (radar).

Known station interference with locked loop for frequency suppressed tools [1], comprising a receiving-transmitting antenna switch of acceptance, the pulse generator of acceptance, power, high frequency (UHF), the mixer of the receiver, the intermediate frequency amplifier (if amplifier, limiter, discriminator, modulator, oscillator, high frequency circuit, the transmitter mixer, the intermediate frequency generator, a modulator and a frequency modulator, performing alternate switching on of the transmitter and receiver determines the frequency of the radar signals of the enemy and automatically rebuild the transmitter frequency to the frequency of the received signal.

A disadvantage of the known station interference (JV) is the low efficiency in terms of the real load range radar, when, despite the presence of the antenna pattern (BOTTOM) JV multiple radars operating at different frequencies will be suppressed only one of them. In addition, in connection with the use toleda suppression own electronic devices (red).

It is also known multichannel automated device for jamming radar stations [2], containing connected in series receiving antenna, the input switch, UHF, switch, output UHF and transmitting antenna and the splitter, the input connected to the output of the UHF and output switch, and N outputs connected to respective inputs of chains, each of which consists of series-connected band-pass filter, a detector, an amplifier (WAC), the gate driver control key switch circuit, an input connected to the output of the corresponding bandpass filter, and the output is connected to respective of the N inputs of the adder, the output of which is connected to the output switch and the first input of the UHF output, a second input connected to the second input of the shaper strobe, the first input connected to the second input of the input switch.

A disadvantage of the known device lies in the low spectral density of the energy potential interference associated with a time error of combining spectra of the noise and signal radar due to the lack of synchronization in time and insufficient accuracy nessel. Increase the spectrum of emitted frequencies leads to inefficient use of transmitter power, does not exclude the suppression own radar and difficult to ensure electromagnetic compatibility (EMC) with other RES.

The closest in technical essence to the proposed device is a station of the interference [3], comprising a receiving antenna, an input key, a broadband UHF, switch, splitter, bandpass filter, detector, amplifier, shaper gate control, key switch circuit, a decoder, a control unit and synchronization (BEADS), the adder, the output UHF output channel switch, oscillator strobe pulses, transmitting antenna and the unit of measurement of time intervals.

Known station interference is as follows.

The signals taken by the receiving antenna through the open in exploration mode input switch, amplified UHF input in accordance with its carrier frequency fall together with the noise signal in one of the frequency channels, where detected, amplified and fed to the gate driver control channel and the unit of measurement of time intervals of the channel. In response to the received signal, the amplitude of which exceeds a certain threshold at Hemi.

The unit of measurement of time intervals of the channels is carried out by selection signals according to the pulse repetition period. According to the results of the analysis of these measurements and measurements of the duration of radiation of radar signals in the control unit and the synchronization signals are formed control frequency channel, determining the width of the spectrum of the interference, and the timing signal interference.

The disadvantages of the prototype are insufficient accuracy and speed of measurement of the carrier frequency of the radar signal, which causes the need for excessive radiation spectrum of noise interference, the same width as the minimum bandwidth bandpass filter channel regardless of the width of the spectrum of the radar signal. This reduces the spectral density of the energy potential interference, as well as complicated issues of electromagnetic compatibility of the device with other RES in the group.

A further reduction of the electronic density of capacity and lack of adaptation of the parameters of the interference to the mode change operation related to the lack of time synchronization emitted interference with the received signal and the corresponding time error overlapping spectra. This is due, first, the impossibility of continuous the a and the transmitter, and secondly, the necessity for the same reason, the presence of breaks for exploration at radiation interference.

The magnitude of the reduction of useful energy potential such interference compared to the ideal - without pausing for further exploration and synchronized in time with the emission of a radar signal, is determined by the duty cycle of the Q signal transmitter

where T[Izl].reached.- time radiation noise that coincides with the signal of the radar;

T[Izl].Osh.- pause in the time structure of the signal caused by radiation interference, not corresponding to the changed parameters of the radar signal; and

Razvan.- pause caused by the requirement interchange receiver and transmitter.

The problem solved by the invention is a device interference with the increased spectral density of the energy potential, providing adaptation parameters noise parameters suppressed radar, time synchronization emitted interference with the signal suppressed radar and electromagnetic compatibility of the device with other electronic means.

The solution to this problem is achieved that the device containing the receiving antenna, the input switch, broadband UHF, razvetviteley, containing in its composition, the selector signals according to the pulse repetition period with N inputs and N outputs, the control unit and synchronization (BEADS), UHF output and transmitting antenna and the output of the input switch, the first input connected to the output of the receiving antenna, is connected to the input of a broadband UHF, the output of which is connected to the input of the splitter, the N outputs of which are connected to respective inputs of the N bandpass filters whose outputs are connected to respective channel inputs of detectors whose outputs are connected to the inputs of the video amplifier, is connected by its outputs to the corresponding inputs of the selector pulse repetition period, N outputs of which are connected each to the respective given frequency channel, the first control unit and synchronization, the first output of which is connected with the control input of the input switch, two electronically controlled switching matrix NxM - input reception and output of the transmitting system, coding and decoding device, ensure the implementation of appropriate operations with information and control signals, the communication channel includes the transmit path, the communication line and the receive path and pregernig frequency for generating signals of heterodyne receiving and transmitting systems, M frequency channels receiver capable of forming a voltage proportional to the deviation transposed into the intermediate frequency of the input signals of the radar station from the Central frequency of the channel includes a mixer subsystem determine the frequency of the input signal, the intermediate frequency amplifier (if amplifier), the frequency discriminator (BH) with an output voltage proportional to the misalignment of the carrier frequency of the received signal and the center frequency of the channel, analog-to-digital Converter (ADC) that converts arriving at its input DC voltage BH binary code of N frequency channels of the transmitter, providing the inverse transform, modulation and amplification of input signals, incorporating the device for generation of modulating signal which includes a pulse generator and noise, as well as the generator synthesized frequencies capable of forming a highly stable harmonic oscillations with a frequency determined by the value of control code ADC receiver, mixer playback subsystem frequency of the input signal, the first and second bandpass filters, advanced UHF, balanced modulator, at first the Finance modulating signals, frequency and timing of which are determined by the corresponding parameters of the signals identified and subject to suppression radar and set the voltage respectively with outputs N+2 and N+3 decoder, the remaining outputs of which control signals are connected to control inputs of the block of the reference generator and the output of the electronically controlled switching matrix of the transmitter, M output UHF and transmitting antennas, and the unit of measurement of time intervals included the selector signals in duration, are connected to N inputs to the output of the corresponding amplifier, and outputs to the N second inputs of BEADS.

The newly introduced elements and connections allow us to increase the accuracy of the carrier frequency radar probing signals and collectively increased the number of measured time and frequency parameters to increase the degree of conformity of received signals to the signal parameters subject to suppression radar.

The technical result is to increase the efficiency of the operation of the device forming reciprocal interference by increasing the spectral density of the energy potential interference and increase the degree of adaptation of its frequency and time of parametera the efficiency of the device is achieved thanks to the included in the device elements and relations, providing spatial separation of the modes “transfer” and achieved so it is possible the continuous monitoring of changes of parameters of radar signals, to provide temporal synchronization of the radiation interference and the received signal, increase the accuracy and reliability of the configuration of signal interference. Thus reducing the required width of the spectrum of the noise, achieved by improving the accuracy of informative features (frequency and time parameters of the signal) subject to suppression, radar, and eliminates the possibility of suppression of own funds, makes things easier EMC device with other devices in the group.

This set of distinctive features is new, because in the existing literature is devoted to the jamming of the onboard radars, are not used.

The drawing shows a structural electrical diagram of the device is the formation of reciprocal interference radar.

The device includes:

the receiving antenna 1 for receiving signals emitted by the radar, its output connected to the first input of the input switch 2; the antenna can be, for example, mirror, horn, or the vibrator;

the input switch 2 - to connect the receiving tra is inen with the input of the amplifier high frequency 3, the switch can be made in the form of valves for p-i-n diodes [4, 222 S.];

UHF 3 for amplifying a received receiving antenna 1 signal; may be performed, for example, in the form of a cascade connection of low-noise transistors [5, S. 291];

splitter 4 for the input signal to the inputs of bandpass filters 5, N its outputs connected to N inputs of bandpass filters 5; splitter can be made in the form of a multipole device parallel type, strip the design of this coupler, as described, for example, in [6, 119 S.];

the input bandpass filters 5 for dividing the input signal by the carrier frequency, their outputs connected to inputs of the detectors 6 and inputs the input switching matrix 10, the filters can be made on the basis of LC-elements, helical resonators, comb-like structures [7, S. 22];

the detector 6 for detecting the signal of a given frequency channel, its output connected to the input of the amplifier 7; it can be performed, for example, on the basis of point microwave diodes [5, S. 23];

amplifier 7 for amplifying detected signal are being shown, its output is connected with the respective N inputs of the selectors of the signal repetition period 81and pulse duration 82unit 8 measurement of time in the and, it contains selectors 81, 82establish the existence of a frequency channel signals with predetermined timing values, including the repetition period (selector 81) and duration (selector 82) pulses; N first and N second outputs connected to respective given frequency channel N first and N second inputs of the BEADS 9; device selection 81and 82unit 8 may be performed, for example, in the form of detectors selectors time intervals [8. S. 552, 553]:

unit 9 of the control and synchronization (BEADS) to control the operation of the frequency channels and the algorithm parameters interference, its first output connected with the control input of the input switch 2, N second, fifth, sixth, seventh outputs connected to control inputs, respectively, of the input electronically controlled switching matrix 10 and the coding device, M third and fourth outputs - control inputs of the matrix 10 and the reference generator block 15, BEADS can be made in the form of a set of analog-to-digital and digital-to-analogue converters and microprocessors appropriate architecture [9, S. 158, 162];

electronically controlled switching matrix 10 to unlock the frequency of the AC the received signal; the matrix can be made on the basis of the combined connection of the switching circuits, for example, on a switching p-i-n diodes [4, 222 S.];

the mixer 11 subsystem frequency signal to convert the signal from the sensor 10, to an intermediate frequency, the mixer can be performed, for example, on the basis of crystal, tunnel, converted or parametric diodes [5, S. 221];

Amplifier 12 for amplifying the intermediate frequency signal received at its input from the mixer 11, the output of the amplifier is connected to the input of a frequency discriminator (BH) 13, power, depending on the requirements and linearity tract can be performed on bipolar or field-effect transistors [10, S. 286, 306];

The frequency discriminator 13 is for detecting signals output from the amplifier 12, the output of the discriminator 13 is connected to the input of analog-to-digital Converter (AID) 14, the discriminator may be performed, for example, on the basis of the circuit diagram of the filter in the load collector circuit of transistor amplifier 12 [12, S. 401];

ADC 14 - for code generation frequency by converting the voltage BH binary code that can be executed on standard chips, for example, type 1108 PV 1A;

block reference generator 15 is formed for the respective frequency channel of the receiver; can be made in the form of a set of discrete high-stability quartz stabilization generators [12, S. 303];

the encoder 16 for the formation of the provisional code sequence on the basis of the conversion codes of the signals received at its control inputs from outputs 5, 6 and 7 BEADS, which carry information about the number of the input filter, the number of the frequency channel and mode of operation, and combining them with codes frequency received at its data inputs (1,..., M) from outputs of the ADC can be made on the basis of the combined connection standard for digital integrated circuits according to the principles described, for example, in [13];

the communication channel 17 for passing the time code sequence from the coding device of the receiver to a decoding device of the transmitter, depending on the features of construction equipment, including radio propagation conditions, special requirements, removal of the receiver and transmitter, a communication channel may be in the form of feeder channel (two-wire lines, coaxial and waveguide) or radio channel, including its composition, as shown in the drawing, the transmit path 18, line 19 and the receive path 20;

the transmit path 18 for the modulation, amplification and radiation of the disk is local devices transmitting systems under the scheme, see, for example, in [14, S. 157];

line 19 - for distribution of signals from the transmitter, depending on the build of the communication channel, the communication line may be in the form of feeder or radio channel.

the receive path 20 for reception and demodulation of the received transmitter signal; may be made on the basis of known devices receiving systems according to the scheme given in [14, S. 157];

the decoding device 21 for decoding information received at the input of the decoder with the output of the receive path 20 to form a control command modes separate devices transmitting system of generators of synthesized frequencies 22, electronically controlled switching matrix 28, the devices forming the modulating signal 29, the reference generator block 30; is the same codereuse device [13];

generator synthesized frequency (RNG) 22 for the formation of highly stable harmonic oscillations with a frequency determined by the value of the control code received at the input of the respective random number generator with outputs 1, ..., N decoder 21; RNG can be performed based on, for example, the system phase-locked loop (PLL) frequency divider having a variable division factor [15];

servy input from the output of the RNG 22, the frequency of the input signal of the corresponding frequency channel, the output of mixer 23 is connected to the input of bandpass filter 24, the mixer can be performed, for example, based on the crystalline tunneling converted or parametric diodes [5, S. 221];

band-pass filter 24 for selection of frequency signals of a given frequency channel, arriving at its input from the output of the mixer 23, the output of the filter 24 is connected to the input of pre UHF 25, filter, depending on the range, may be made on the basis of LC-elements, spiral resonators or comb-like structures [7, S. 22];

preliminary UHF 25 - to amplify the RF signals from the output of bandpass filter 24, the output of the UHF 25 is connected to the input of balanced modulator 26; UHF can be made based on the series connection of transistor cascades [5, S. 291];

balanced modulator 26 - modulation harmonic microwave signal received at its first input with the pre-output UHF noise signal to the second input of the modulator from the output of the noise generator 292the output of the modulator is connected to the input of bandpass filter 27; balanced modulator may be performed, for example, based on the mixing of microwave diodes connected on balanced output of the balanced modulator 26, the output of the filter is connected with the corresponding (1, ..., N) input output electronically controlled switching matrix 28, the filter 27 can be made on the basis of LC-elements, helical resonators, comb-like structures [7, S. 22];

the output of the electronically controlled switching matrix NxM 28 to connect tract subsystem frequency signal (frequency channel of the transmitter under the influence of control signals at its N+1, ..., 2N control inputs with matching frequency channel N+4 output decoder 21 (when the control information 1...N outputs of the matrix 28) and arriving at its 2N+1, ..., 2N+M control inputs from the corresponding N+5 output decoder 21 (when the control information 1, ..., M outputs of the matrix 28); matrix 28 can be performed by analogy with the matrix 10 on the basis of the switching p-i-n diodes [4, 222 S.];

the device 29 of the formation of the modulating signals for the formation of the noise signal with the specified frequency and temporal characteristics;

the noise generator 291in order to create a noise modulating signal, the width of the spectrum corresponding to the signal is identified and subject to suppression radar, under the influence of the control signal N+2 output is enerator pulses 292; the noise generator 261can be performed, for example, on the basis of the noise diodes [16, 114 S.];

the pulse generator 292- for the formation of videokursov specified duration under the influence of a control signal with N+3 outputs of the respective frequency channel, the decoder 21, the output of pulse generator 292connected with the second input of the balanced modulator 26; the pulse generator 293can be performed, for example, on the basis of transistor electronic keys [11, S. 340];

the block of the reference generator 30 for generating a highly stable harmonic oscillations, its outputs are connected with the second inputs of the mixers 23 playback subsystem frequency; block 30 can be performed by analogy with block 15 in the form of a set of discrete electron managed high-stability oscillators [12, S. 303];

weekend UHF 31 - to enhance the interfering signal arriving at its input with the outputs of the switching matrix 28, the outputs UHF connected to inputs of transmitting antennas 32, UHF can be performed, for example, on the basis of powerful transistors with broadband matching circuits [17, S. 73];

transmitting antenna 32 for radiation noise and interference signals received at their inputs with outputs UHF 31, in healthy lifestyles is Denmark interference radar stations operates as follows.

The signals taken by the receiving antenna 1 through the opened in exploration mode input switch 2, amplified UHF input 3, via splitter 4, in accordance with its carrier frequency through one of the bandpass filter 5 is fed to the input of the detector 6, which are detected and then amplified by amplifier 7 and fed to the unit 8 measurement timing signal for selection of received signals with parameters that are within the specified limits edit: in the selector 81- the repetition period, the selector 82- pulses. The output signals of the selectors containing coded information about the frequency channel and pulse parameters radar probing signals, allow for the combination of informative features to decide on a set of received signals to a particular type of radar. The results of the evaluation of the temporal characteristics of the pulses and selecting the type of radar to suppress, outputs 2 and 3 unit 9 serves the control voltage, respectively, for N=1, ..., 2N and 2N+1, ..., 2N+M control inputs input switching matrix 10 to unlock the corresponding information 1, ..., N inputs and 1, ..., M outputs, the outputs of the bandpass filter 5 will poshupat on a series of soy discriminator 13.

The output voltage of the discriminator corresponding to the frequency of the input signal received at the input of the ADC 14 is converted into a binary code and is supplied to one of M information inputs of encoder 16, the control input of which receives signals from the outputs 5, 6, 7 unit 9 of the control and synchronization, bearing in binary code the number information of the input filter, the number of the frequency channel and mode of operation, defined temporal characteristics of the received signal.

Provisional code sequence generated in the encoder 16 based on the received at its inputs the information and control signals received at the input of the transmitting tract 18 channel 17. Converted into a pulse-modulated signal with the code sequence output from the transmitter 18 through line 19 is fed to the input receiving channel 20 channel 17 and after demodulation is supplied to the decoding device 21.

Formed in the decoder 21 in the result of decoding the control signals are sent to the control inputs of the individual devices transmitting system as control commands modes of their operation. Output 1, ..., N controls the frequency of the signal RNG 22, installing it in accordance with vyhodnem input signal receiving device, comes on a chain of series-connected devices of the subsystem frequency of the input signal (frequency channel transmitter): mixer 23, the second input of which receives the signal block of the reference generator 30 driven at a frequency in accordance with the number of analyzed frequency channel signal output N+1 decoder 21, a band-pass filter 24, a preliminary UHF 25, balanced modulator 26, the second input of which receives the signal from the output 29 of the formation of the modulating signals, frequency and time parameters which are set respectively by the control signals, outputs of N+2 and N+3 of the decoder 21 to the control inputs of series-connected noise generator 291and pulse generator 292, band-pass filter 27. The output signal of the filter 27 through 1, ..., M inputs, and 1, ..., N outputs output switching matrix 28 opened by signals from outputs of respectively N+5 and N+4 decoder 21 on the control inputs (2N+1), ..., (2N+M) and (N+1), ..., 2N matrix 28, is fed to the input of the corresponding output UHF 311, ..., 31mamplified, is fed to the input of the transmitting antenna 321, ..., 32mand is radiated in the direction of the noise reduct is the playing of the carrier frequency signal is suppressed radar compared to the prototype 5-10 times (depending on the bandwidth of one frequency channel). Reducing the required width of the noise spectrum due to the aforementioned increase in the fidelity of the carrier frequency of the radar signal provides an increase of 7-10 dB spectral density of the energy potential interference and effective action on the radar of the proposed device. Additional increase in efficiency of about 1.5 to 3 dB compared to analogue is achieved by reducing the duty cycle of signal interference or increase the proportion of useful radiated signal in the time structure of the signal transmitter (see the formula for calculating the duty cycle). This became possible due under the proposed device for the continuous monitoring of parameters of radar probing signals and providing timing signals interference and radar at the expense included in the device elements and relationships that provide spatial isolation modes “transfer”. The result is addressing the adaptation of the interference parameters and change the parameters of radar signals, optimizing the structure and the power radiated interference, EMC device with other devices in the group.

LITERATURE

1. U.S. patent 3431496, IPC H 04 To 3/00,1966.

2. U.S. patent 3896439, IPC H 04 To 3/0 is, M., "Sov. radio", 1974.

5. I. M. Ainbinder. The inputs of the receivers. M., "Communication", 1973.

6. Radio transmitting devices. Edited by O. A. pH Meters, Radio and communication, 1982.

7. G Hansel. The reference calculation filters. M., "Sov. radio", 1974.

8. J. C. Itzhaki, N. And. Ovchinnikov. Pulse and digital devices. M., "Sov. radio, 1973.

9. C. M. Volkov, A. A. Ivanchenko, V. Y. Lapiy. Microelectronics. Kiev, Tekhnika, 1983.

10. Y. L. Simon. The intermediate frequency amplifiers. M., "Sov. radio, 1973.

11. Y. A. Bulanov, S. N. Moustache. Amplifiers and a receiving device. M., "Higher school", 1971.

12. B. C. Hersonski. Fundamentals of electronics. Kiev, "Higher school", 1977.

13. L. F. Borodin. Introduction to theory of error-correcting coding. "Owls. radio", M., 1968.

14. K. Y. Agranovsky, A. N.Zlotogorski, V., Kiselev. Radio system. M., "Higher school", 1979.

15. A receiving device, Ed. by A. G. Barulin. M., "Radio communication, 1984.

16. N. M.Teterycz. Generators of noise and measurement noise characteristics. M., "Energy", 1968.

17. Broadband wireless devices. Under. ed O. C. Alekseeva, M., "Communication", 1978.

Claims

Device for the formation of reciprocal interference radar stations containing connected in series receiving antenna, the input is the od of the N-input of bandpass filters, N frequency channels, which are connected in series United detector input connected to the output of the corresponding input bandpass filter and amplifier, as well as UHF output, the output connected to the input of the transmitting antenna, power management and synchronization (BEADS), the first output of which is connected with the control input of the input switch, the unit of measurement of time intervals with the selector signals according to the pulse repetition period with N inputs, each of which is connected to the output of the amplifier corresponding frequency channel, and N outputs, each connected to one of the first inputs of BEADS corresponding to the given frequency channel, characterized in that its composition is introduced selector signal pulses, is connected to the output of the amplifier corresponding frequency channel N inputs and N outputs, to the second inputs of the BEADS in the unit of measurement of time intervals, electronically controlled switching matrix (EUPM) receiver NxM, information inputs which 1...N are connected to the outputs of the input bandpass filters, EUPM transmitter NxM, information which outputs 1...M are connected to the inputs of the output UHF, coding and decoding ustroistvo to the output of the coding device, communication line and the receive path, an output connected to the input of the decoding device, the block generator reference frequency of the receiver, the control inputs of which is connected to the fourth output BUS, the block generator reference frequency of the transmitter, the control inputs of which are connected to the outputs of the N+1 decoding device, M frequency receiver channels, each comprising connected in series mixer subsystem frequency signal connected to the first input with the corresponding output 1...M matrix of the receiver, and the second input with the corresponding output block generator reference frequency of the receiver, the intermediate frequency amplifier, a frequency discriminator and an analog-to-digital Converter, connected access to the information input of the coding device, the control inputs of which is connected to the fifth, sixth and sedmimi outputs BEADS, and N frequency channel of the transmitter, including each connected in series generator synthesized frequency control input connected to the output 1...N the decoding device, the mixer subsystem frequency signal connected to a second input with a respective given frequency Kani modulator, first input connected to the output of the pre UHF output band-pass filter, the output is connected to input 1...N EUPM transmitter, and a device for generation of modulating signals, an output connected to the second input of the balanced modulator and includes connected in series noise generator and the pulse generator, the control inputs of which are connected with corresponding frequency channel outputs N+2 and N+3 decoder, the remaining outputs of which control signals are connected: N+4 and N+5 - output EUPM, a N+1 - block generator reference frequency, and N the second and third outputs of the BEADS are connected respectively with N+1, ..., 2N and 2N, ..., 2N+M control inputs input EUPM.

 

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2 dwg

FIELD: radio engineering, namely, equipment for generating artificial interference, possible use for protecting information from leaking along vibro-acoustic channel from a room.

SUBSTANCE: in accordance to method for protecting speech information along vibro-acoustic channel, interference is generated for masking speech signal, while interference is formed as M-series of pulses with following transformation, while transformation of M-series of pulses is performed in form of generation of vibration impact signals, by which speech signal is multiplicatively masked, while M-series of pulses is generated from period to period in accordance to random rule.

EFFECT: increased efficiency of technical means for information protection, decreased acoustic radiations, interfering with negotiations, radiations, affecting operation of nearby radio-electronic means, and also disclosing a structure of noise interference, decreasing probability of it being filtered.

2 dwg

FIELD: engineering of equipment for counteracting commercial and industrial espionage.

SUBSTANCE: device includes auxiliary transmitting-receiving antenna, antenna commutator, controllable interference generator, radio radiation detector and additional generator of interference with individual antenna. Launch circuit of controllable interference generator is connected to of radio radiation detector. The latter is made with possible recording of beginning of emission of radio interface of cell phone during its communication with external device, determining presence and frequency channel of unsanctioned communication with radio interface and adjustment of frequency of controlled interference generator. Commutator is enabled with possible switching of auxiliary antenna from input of radio emission detector to output of controllable interference generator for suppressing unsanctioned data transfer through radio interface. Output of radio radiation detector is connected to controlling inputs of commutator and controlled interference generator. For additional interference generator, mode of permanent generation of interference is set in radio spectrum of global positioning systems, excluding capability for determining coordinates of cell phone.

EFFECT: increased efficiency of cell protection from unsanctioned pickup of information from radio interface with reliable suppression of attempts of determining current location of cell phone.

3 cl, 1 dwg

FIELD: technology for creating artificial interference for masking speech information in industrial network of alternating current.

SUBSTANCE: device (dwg. 1) contains rectifier 2 and, connected serially, noise signal generator 4, noise signal power amplifier 5 and emitter 6, in noise signal amplifier 5, mode B or AB is implemented, between rectifier 2 and power chain of noise signal generator 4 and power amplifier of noise signal, impulse automatic-compensation voltage stabilizer 8 is inserted, at output of which upper frequency filter is mounted, lower cut frequency of which is higher than upper frequency of audible spectrum, but lower than clock frequency of impulse automatic-compensation voltage stabilizer 8.

EFFECT: increased protection of sound amplification equipment from possible electromagnetic leakage of sound information along power chains.

2 dwg

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