RU2237372C2 - Device for generating radar station response noise - Google Patents

Abstract

FIELD: radio engineering; electronic suppression of radar stations.

SUBSTANCE: proposed device designed to generate noise having energy potential of high spectral density due to high precision of evaluating radar sounding signal carrier, degree of compliance of parameters of signals received to those of radar to be suppressed, and improved time synchronization noise and radar signals is provided with newly introduced pulse-length signal selector; two electronically controlled receiver and transmitter matrices N x M; coding and decoding units; communication channel; two generator and transmitter frequency standards; M receiver frequency channels each incorporating series-connected signal-frequency evaluating subsystem mixer, intermediate-frequency amplifier, frequency discriminator, and analog-to-digital converter; N transmitter frequency channels each incorporating series-connected synthesized frequency oscillator, signal frequency recovering subsystem mixer, band filter, high-frequency preamplifier, balance modulator, output band filter; and also modulating signal shaping unit incorporated in series-connected noise generator and pulse generator.

EFFECT: enhanced spectral density of noise energy potential.

1 cl, 1 dwg

Description

The invention relates to radio engineering and can be used for electronic suppression of pulse-Doppler and pulse radar stations.

Known radio interference station with automatic tuning to the frequencies of the suppressed means [1], containing the transmit-receive antenna, the transmit-receive switch, a pulse transmit-receive generator, a high-frequency amplifier (UHF), a receiver mixer, an intermediate frequency amplifier (UHF), a limiter, a discriminator , modulator, local oscillator, high-frequency circuits, transmitter mixer, intermediate frequency generator, modulator and frequency modulator, which alternately turns on the receiver and transmitter, which determines the frequency of the signal Radar enemy and automatically reconfigures the transmitter frequency to the received signal frequency.

A disadvantage of the known jamming station (SP) is the low efficiency of its operation under conditions of real band loading by different radars, when, despite the presence of several radars operating at different frequencies in the radiation pattern of the antenna (BD) of the SP, only one of them will be suppressed. In addition, in connection with the use of only one informative feature (radiation frequency), the identification of radar to be suppressed does not exclude the suppression of its own electronic equipment (RES).

Also known is a multi-channel automated device for interfering with radar stations [2], which contains a series-connected receiving antenna, input switch, UHF, switch, output UHF and transmitting antenna, as well as a splitter whose input is connected to the UHF output and the output of the switch, and N outputs connected to the corresponding inputs of the chains, each of which consists of a series-connected band-pass filter, detector, video amplifier (VUS), a shaper of the control strobe switch key th circuit, the input of which is connected to the output of the corresponding band-pass filter, and the output is connected to the corresponding of the N inputs of the adder, the output of which is connected to the output of the switch and the first input of the output UHF, the second input of which is connected to the second input of the gate-pulse shaper, the first input of which is connected with the second input of the input switch.

A disadvantage of the known device is the low spectral density of the interference energy potential, associated with the time error of combining the interference spectra and the radar signal due to the lack of their synchronization in time, as well as the insufficient accuracy of determining the carrier frequency and the need for using an oversized modulating spectrum width noise signal. An increase in the spectrum of emitted frequencies leads to inefficient use of the transmitter power, does not exclude the suppression of its own radar, and makes it difficult to ensure electromagnetic compatibility (EMC) with other RES.

Closest to the technical nature of the proposed device is an interference station [3], containing a receiving antenna, input key, UHF broadband, switch, splitter, bandpass filter, detector, video amplifier, control strobe driver, key switch switch, decoder, control and synchronization unit (BUS), the adder, the output of the UHF, the output channel switch, the strobe generator, the transmitting antenna and the unit for measuring time intervals.

A known jamming station operates as follows.

The signals received by the receiving antenna through the input switch open in reconnaissance mode, amplified by the input UHF in accordance with its carrier frequency, fall together with the noise signal into one of the frequency channels, where they are detected, amplified and fed to the channel control strobe shaper and the channel time interval measuring unit . In response to the incoming signal, the amplitude of which exceeds a certain threshold level of the driver of the control strobe, a switch of the key circuit is closed in this frequency channel.

In the device for measuring the time intervals of the channels, the signals are selected by the pulse repetition period. Based on the results of the analysis of these measurements and the measurement of the duration of the radar signals in the control and synchronization unit, control signals are generated for the frequency channel that determines the width of the interference spectrum and the temporal parameters of the interference signal.

The disadvantages of the prototype are the lack of accuracy and speed of measurement of the carrier frequency of the radar signal, which necessitates the emission of an excess noise interference spectrum equal in width to at least the passband of the channel band-pass filter, regardless of the width of the radar signal spectrum. As a result, the spectral density of the energy potential of the interference decreases, and the issues of providing an EMC device with other RES in the group become more complicated.

An additional decrease in the electron potential density and the lack of adaptation of the interference parameters to changing the radar operating mode are associated with the lack of time synchronization of the emitted interference with the received signal and the corresponding time error of the spectra combining. This is explained, firstly, by the inability to continuously monitor changes in the radar operation modes due to the method of temporary isolation of the receiver and transmitter adopted in the prototype, and, secondly, the need for the same reason to have pauses for additional reconnaissance during interference radiation.

The magnitude of the reduction in the useful energy potential of such interference compared to the ideal one - without pauses for additional reconnaissance and synchronized in time with the radar signal radiation, is determined by the duty cycle Q of the transmitter signal

where T is _useful. - time radiation interference, coinciding in time with the radar signal;

T _er. - a pause in the temporal structure of the transmitter signal caused by interference radiation that does not correspond to the changed radar signal parameters;

τ _decoupling - pause caused by the requirement of decoupling the receiver and transmitter.

The problem solved by the invention is the creation of an interference device with an increased spectral density of the energy potential, which ensures adaptation of the interference parameters to the parameters of the suppressed radar, temporary synchronization of the emitted interference with the signal of the suppressed radar and the electromagnetic compatibility of the device with other electronic means.

The solution to this problem is achieved by the fact that in a device containing a receiving antenna, an input switch, a broadband UHF, a splitter with a bandpass filter, a detector and a video amplifier in each arm of the splitter, a unit for measuring time intervals, which contains a signal selector for the pulse repetition period with N inputs and N outputs, the control and synchronization unit (BUS), the output UHF 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 wide input UHF band, the output of which is connected to the input of the splitter, N outputs of which are connected to the corresponding inputs of N bandpass filters, the outputs of which are connected to the inputs of the detectors whose outputs are connected to the inputs of the video amplifiers connected by their outputs to the corresponding inputs of the selector by the pulse repetition period, N the outputs of which are connected each to the corresponding given frequency channel, the first input of the control and synchronization unit, the first output of which is connected to the control In the course of the input switch, two electronically controlled switching matrices NxM were introduced - at the input of the receiving and output of the transmitting system, encoding and decoding devices for performing the corresponding operations with information and control signals, a communication channel that includes a transmitting path, a communication line, and a receiving path and designed to transmit encoded signals from the receiving to the transmitting system, two blocks of reference frequency generators for generating the local oscillator signals of the receiving and transmitting systems, M frequency channels of the receiver, providing a voltage proportional to the deviation of the radar input signals transposed into the intermediate frequency from the center frequency of the channel, including a mixer of the subsystem for determining the frequency of the input signal, an intermediate frequency amplifier (IF), and a frequency discriminator (BH) with output voltage proportional to the mismatch of the carrier frequency of the received signal and the center frequency of the channel, analog-to-digital Converter (ADC), designed for converting the BH constant voltage supplied to its input into a binary code, N frequency channels of the transmitter, providing inverse conversion, modulation and amplification of input signals, including a modulating signal generating device, which includes pulse and noise generators, as well as a generator synthesized frequencies, providing the formation of highly stable harmonic oscillations with a frequency determined by the value of the control code of the ADC receiver, the reproducing subsystem mixer the frequency of the input signal, the first and second bandpass filters, the preliminary UHF, balanced modulator, the first and second inputs of which respectively receive the signals from the outputs of the preliminary UHF and the device for generating modulating signals, the frequency and time parameters of which are determined by the corresponding parameters of the signals detected and to be suppressed by the radar and are set by voltage, respectively, from the outputs N + 2 and N + 3 of the decoding device, the remaining outputs of which are connected by a control signal with the control inputs of the block of reference generators and the output of an electronically controlled switching matrix of the transmitter, M output UHF and transmitting antennas, and the time interval measurement unit includes a signal selector for duration connected by N inputs to the output of the corresponding video amplifier, and outputs to N second inputs of the bus .

The newly introduced elements and communications make it possible to increase the accuracy of measuring the carrier frequency of the probing radar signals and, together with the increased number of measured time and frequency parameters, to increase the degree of correspondence of the received signals to the signal parameters to be suppressed by the radar.

In this case, the technical result consists in increasing the operational efficiency of the response interference generating device by increasing the spectral density of the interference energy potential and increasing the degree of adaptation of its frequency and time parameters to changing signal parameters and operating modes of the radar to be suppressed. The implementation of the increased performance indicators of the device is achieved thanks to the elements and connections introduced into the device, which provide the spatial decoupling of the “receive-transmit” modes and thus achieved the possibility of continuous monitoring of changes in the parameters of radar signals, providing temporary synchronization of interference emissions and the received signal, improving the accuracy and reliability of the interference signal settings. At the same time, the reduction in the necessary width of the interference spectrum, achieved by increasing the accuracy of determining the informative features (frequency and time parameters of the signal) of the radar to be suppressed, eliminates the possibility of suppressing own means, simplifies the solution of EMC device problems with other means in the group.

The indicated set of distinctive features is new, since the well-known literature on the issues of radio-electronic suppression of airborne radars was not given.

The drawing shows a structural electrical diagram of the proposed device for the formation of response interference radar.

The device contains:

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

input switch 2 - to connect the receiving path to the intelligence mode under the influence of the control signal of the control and synchronization unit 9, its output is connected to the input of the high-frequency amplifier 3, the switch can be made in the form of microassemblies on p-i-n diodes [4, p.222];

UHF 3 - to amplify the signal received by the receiving antenna 1; can be performed, for example, in the form of a cascade connection of low-noise transistors [5, p. 291];

splitter 4 - for supplying an input signal to the inputs of bandpass filters 5, N of its outputs are connected to N inputs of bandpass filters 5; the splitter can be made in the form of a multipolar device of a parallel type, the strip design of such a splitter is given, for example, in [6, p. 119];

input bandpass filters 5 — for dividing the input signals by the carrier frequency, their outputs are connected to the inputs of the detectors 6 and the inputs of the input switching matrix 10, the filters can be made on the basis of LC elements, spiral resonators, comb structures [7, p.22];

detector 6 - for detecting a signal of a given frequency channel, its output is connected to the input of video amplifier 7; it can be made, for example, based on point microwave diodes [5, p.23];

video amplifier 7 - to amplify the detected signal, its output is connected to the corresponding N inputs of the signal selectors for a repetition period of 8 ₁ and pulse duration 8 ₂ block 8 measuring time intervals;

block 8 measuring time intervals - to highlight signals with predetermined impulse parameters, its constituents 8 ₁ , 8 ₂ establish the fact of the presence in the frequency channels of signals with preset time values, incl. by the repetition period (selector 8 ₁ ) and the duration (selector 8 ₂ ) of the pulses; its N first and N second outputs are connected to N first and N second inputs of the BUS 9 corresponding to a given frequency channel; selection devices 8 ₁ and 8 _{2 of} block 8 can be performed, for example, in the form of detectors of selectors of time intervals [8. p. 522, 553]:

control and synchronization unit (BUS) 9 - to control the operation of frequency channels and the algorithm for generating interference parameters, its first output is connected to the control input of the input switch 2, N second, fifth, sixth, seventh outputs are connected to the control inputs of the input electronically controlled switching matrix 10 and the encoding device, M third and fourth outputs - with control inputs of the matrix 10 and the block of reference generators 15, the BUS can be made in the form of a combination of analog-digital and digital-analogue converters and microprocessors of the corresponding architecture [9, p. 158, 162];

electronically controlled switching matrix 10 - for unlocking the frequency channels of the receiver, each of its M outputs is connected to the input of the mixer 11 of the subsystem for determining the carrier frequency of the received signal; the matrix can be made on the basis of a combined connection of switching circuits, for example, on switching p-i-n diodes [4, p.222];

mixer 11 of the subsystem for determining the frequency of the signal - for converting the signal from the matrix 10 to an intermediate frequency, the mixer can be performed, for example, on the basis of crystalline, tunneling, inverted or parametric diodes [5, p.221];

UPCH 12 - to amplify the intermediate frequency signal supplied to its input from the mixer 11, the output of the UPCH is connected to the input of the frequency discriminator (BH) 13, the amplifier, depending on the requirements and linearity of the path, can be performed on bipolar or field-effect transistors [10, p.286, 306];

Frequency discriminator 13 - for detecting signals from the output of the amplifier 12, the output of the discriminator 13 is connected to the input of an analog-to-digital converter (AID) 14, the discriminator can be performed, for example, on the basis of a dual-circuit filter circuit in the load of the collector circuit of the transistor amplifier 12 [12 , p.401];

ADC 14 - for generating a frequency code by converting the BH voltage to a binary code, it can be performed on standard microcircuits, for example, type 1108 PV 1A;

a block of reference generators 15 - for generating signals of local oscillators of the frequency channels of the receiver, the outputs of the block are connected to the second inputs of the mixers 11 of the corresponding frequency channel of the receiver; can be made in the form of a set of discrete highly stable oscillators with quartz stabilization [12, p.303];

encoding device 16 — for generating a temporary code sequence based on conversion into codes of signals arriving at its control inputs from outputs 5, 6, and 7 of the busbar carrying information about the input filter number, frequency channel number, and radar operation mode, and combining them with codes the frequencies arriving at its information inputs (1, ..., M) from the ADC outputs can be performed on the basis of a combined connection of standard digital microcircuits according to the principles described, for example, in [13];

communication channel 17 — for transmitting a time code sequence from the encoder of the receiver to the decoding device of the transmitter, depending on the design of the equipment, taking into account the propagation conditions of the radio waves, special requirements, removal of the receiver and the transmitter, the communication channel can be made in the form of a feeder channel (two-wire line, coaxial, waveguide) or radio channel, which includes, as shown in the drawing, a transmitting path 18, a communication line 19 and a receiving path 20;

transmitting path 18 - for modulation, amplification and radiation of discrete information received at its input from the output of the encoder; can be performed on the basis of known devices of transmission systems according to the scheme given, for example, in [14, p.157];

communication line 19 - for the distribution of transmitter signals, depending on the construction of the communication channel, the communication line can be made in the form of a feeder or a radio channel;

a receiving path 20 for receiving and demodulating a signal received from a transmitter; can be performed on the basis of known devices of receiving systems according to the scheme given, for example, in [14, p.157];

decoding device 21 - for decoding information received at the input of the decoder from the output of the receiving path 20 in order to generate control commands for the operation modes of individual devices of the transmitting system: synthesized frequency generators 22, an electronically controlled switching matrix 28, modulating signal generating devices 29, reference oscillator unit 30 ; performed similarly to an encoding device [13];

synthesized frequency generator (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 corresponding RNG from the outputs 1, ..., N of decoder 21; The RNG can be performed on the basis of, for example, a phase locked loop (PLL) with a frequency divider having a variable division coefficient [15];

mixer 23 of the subsystem for reproducing the signal frequency — for converting the IF signal arriving at its first input from the RNG output 22 into the frequency of the input signal of the corresponding frequency channel, the output of the mixer 23 is connected to the input of the bandpass filter 24, the mixer can be made, for example, based on crystalline tunnel reversed or parametric diodes [5, p.221];

band-pass filter 24 - for frequency selection of the 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 the preliminary UHF 25, the filter, depending on the range, can be made on the basis of LC elements, spiral resonators or comb structures [7, p.22];

preliminary UHF 25 - to enhance the RF signals coming from the output of the bandpass filter 24, the output of the UHF 25 is connected to the input of the balanced modulator 26; UHF can be performed on the basis of a series connection of transistor cascades [5, p.291];

balanced modulator 26 - to modulate the harmonic microwave signal supplied to its first input from the output of the preliminary UHF, a noise signal supplied to the second input of the modulator from the output of the noise generator 29 _{2 the} output of the modulator is connected to the input of the bandpass filter 27; a balanced modulator can be performed, for example, based on mixing microwave diodes connected in a balanced circuit [11, p.260];

band-pass filter 27 - for the selection of signals of a given frequency channel arriving at its input from the output of the balanced modulator 26, the filter output is connected to the corresponding (1, ..., N) input of the output electronically controlled switching matrix 28, the filter 27 can be based on LC-elements, spiral resonators, comb structures [7, p.22];

output electronically controlled switching matrix NxM 28 - for connecting the path of the subsystem for reproducing the signal frequency (transmitter frequency channel) under the influence of control signals supplied to its N + 1, ..., 2N control inputs from the decoder output 21 corresponding to this frequency channel N + 4 (when controlling the information 1 ... N outputs of the matrix 28) and the control inputs coming from its 2N + 1, ..., 2N + M from the corresponding N + 5 outputs of the decoder 21 (when controlling the information 1, ..., M outputs matrix 28); matrix 28 can be performed by analogy with matrix 10 based on switching p-i-n diodes [4, p. 222];

a modulating signal generating device 29 for generating a noise signal with predetermined frequency and time characteristics;

noise generator 29 ₁ - for the formation of a noise modulating signal, across the width of the spectrum corresponding to the signal identified and to be suppressed by the radar, under the influence of a control signal from the N + 2 output corresponding to this frequency channel, decoder 21, the output of the noise generator 29 _{1 is} connected to the input pulse generator 29 ₂ ; the noise generator 26 ₁ can be performed, for example, based on noise diodes [16, p.114];

pulse generator 29 ₂ - for generating video pulses of a given duration under the influence of a control signal from the N + 3 output corresponding to a given frequency channel, decoder 21, the output of the pulse generator 29 _{2 is} connected to the second input of the balanced modulator 26; pulse generator 29 ₃ can be performed, for example, based on transistor electronic keys [11, p. 340];

a block of reference generators 30 — for generating highly stable harmonic oscillations, its outputs are connected to the second inputs of the mixers 23 of the frequency reproduction subsystem; block 30 can be performed by analogy with block 15 in the form of a set of discrete electronically controlled highly stable generators [12, p.303];

UHF output 31 - to amplify the interference signal coming to its input from the outputs of the switching matrix 28, UHF outputs are connected to the inputs of the transmitting antennas 32, UHF can be performed, for example, based on powerful transistors with wideband matching chains [17, p.73] ;

transmitting antennas 32 - for radiation of interfering signals arriving at their inputs from the outputs of UHF 31, in the direction of the explored radar, the antenna can be, for example, a mirror, horn or vibrator.

A device for creating interference to radar stations works as follows.

The signals received by the receiving antenna 1, through the input switch 2 open in reconnaissance mode, amplified by the input UHF 3, through the splitter 4, in accordance with their carrier frequency through one of the band-pass filters 5 are fed to the input of the detector 6, where they are detected, then amplified by a video amplifier 7 and enter block 8 for measuring the temporal parameters of the signal for selecting received signals with parameters that are within the specified limits of their change: in the selector 8 ₁ - according to the repetition period, in the selector 8 ₂ - according to the duration of the pulses. The output signals of the selectors, containing encoded information about the frequency channel and the pulse parameters of the probing radar signals, make it possible, based on a set of informative features, to decide whether the received signals belong to a certain type of radar. According to the results of evaluating the temporal characteristics of the pulses and choosing the type of radar to suppress, the control voltages from outputs 2 and 3 of block 9 are applied to N = 1, ..., 2N and 2N + 1, ..., 2N + M control inputs of the input switching matrices 10 for unlocking the corresponding information 1, ..., N inputs and 1, ..., M outputs, the signal from the output of the bandpass filter 5 is fed to the chain of series-connected mixer 11, the second input of which receives the signal of the block of reference generators 15, 12, the frequency discriminator 13.

The output voltage of the discriminator, corresponding to the frequency of the input signal, is fed to the input of the ADC 14, converted to binary code and fed to one of the M information inputs of the encoding device 16, the control inputs of which receive signals from the outputs 5, 6, 7 of the control and synchronization unit 9, carrying in binary code information about the number of the input filter, the number of the frequency channel and the operating mode of the radar, determined by the time characteristics of the received signal.

A temporary code sequence generated in the encoder 16 on the basis of information and control signals received at its inputs is fed to the input of the transmitting path 18 of the communication channel 17. The code sequence converted to a pulse-modulated signal from the output of the transmitter 18 through the communication line 19 is fed to the input of the receiving path 20 of the communication channel 17 and after demodulation enters the decoding device 21.

The control signals generated in the decoder 21 as a result of decoding are supplied to the control inputs of individual devices of the transmitting system as control commands for their operation modes. The signal from the output 1, ..., N controls the frequency of the signal of the RNG 22, setting it in accordance with the output voltage of the frequency discriminator 14. As a result, the output signal of the RNG 22, equal in frequency to the converted input signal of the receiving device, enters the chain of series-connected devices of the subsystem reproducing the frequency of the input signal (frequency channel of the transmitter): mixer 23, the second input of which receives the signal of the block of reference generators 30, controlled by frequency in accordance with the number of the analyzed the frequency channel with the signal coming from the output N + 1 of the decoder 21, the bandpass filter 24, the preliminary UHF 25, the balance modulator 26, the second input of which receives the signal from the output of the modulating signal generating device 29, the frequency and time parameters of which are set respectively by the control signals received from the outputs N + 2 and N + 3 of the decoder 21 to the control inputs of a series-connected noise generator 29 ₁ and a pulse generator 29 ₂ , a band-pass filter 27. The output signal of the filter 27 through 1, ..., M inputs and 1, ..., N outputs one switching matrix 28, open with the help of signals from the outputs N + 5 and N + 4 of decoder 21, respectively, to the control inputs (2N + 1), ..., (2N + M) and (N + 1), .. ., 2N of the matrix 28, is fed to the input of the corresponding output UHF 31 ₁ , ..., 31 _m , amplified, fed to the input of the transmitting antenna 32 ₁ , ..., 32 _m and is radiated in the direction of the suppressed radar.

The proposed radar response jamming device allows to increase the accuracy of estimation and reproduction of the carrier frequency of the signal of the suppressed radar in comparison with the prototype 5-10 times (depending on the bandwidth of the frequency channel). The reduction in the required width of the noise spectrum due to the aforementioned increase in the accuracy of reproduction of the carrier frequency of the radar signal provides an increase of 7-10 dB in the spectral density of the interference energy potential and the effectiveness of the effect on the radar of the proposed device. An additional increase in efficiency by about 1.5-3 dB compared to the analogue is achieved by reducing the duty cycle of the interference signal or by increasing the proportion of the useful emitted signal in the time structure of the transmitter signal (see the duty cycle calculation formula). This became possible due to the continuity of the parameters of the probing radar signals provided in the proposed device and the provision of temporary synchronization of the interference and radar signals due to the elements and communications introduced into the device, which provide spatial decoupling of the “receive-transmit” modes. As a result, it is possible to solve the problems of adapting the interference parameters and changing the parameters of the radar signals, optimizing the structure and energy potential of the radiated noise, and the EMC device with other means in the group.

LITERATURE

1. US patent 3431496, IPC N 04 K 3 / 00.1966.

2. US patent 3896439, IPC N 04 K 3/00, 1955.

3. RF patent 2054806, IPC N 04 K 3/00, 1996.

4. Design and calculation of strip devices. Ed. I.S. Kovaleva, M., "Sov. Radio", 1974.

5. I.M. Ainbinder. Input stages of radios. M., "Communication", 1973.

6. Radio transmitting devices. Ed. O.A. Chelnokova, M., "Radio and Communications", 1982.

7. G. Hanzel. Reference for the calculation of filters. M., "Sov. Radio", 1974.

8. Ya.S. Yitzhoki, N.I. Ovchinnikov. Pulse and digital devices. M., "Sov. Radio", 1973.

9. V.M. Volkov, A.A. Ivanchenko, V.Yu. Lapiy. Microelectronics. Kiev ", Technique", 1983.

10. Yu.L. Simonov. Amplifiers of intermediate frequency. M., "Sov. Radio", 1973.

11. Yu.A. Bulanov, S.N. Usov. Amplifiers and radio receivers. M., "Higher School", 1971.

12. B.S. Gershunsky. Fundamentals of Electronics. Kiev, "Higher School", 1977.

13. L.F. Borodin. Introduction to the theory of error-correcting coding. "Sov. Radio", M., 1968.

14. K.Yu. Agranovsky, D.N. Zlatogursky, V.G. Kiselev. Radio engineering systems. M., "Higher School", 1979.

15. Radio receivers, ed. A.G. Barulin. M., "Radio and Communications", 1984.

16.N.M. Teterich. Noise generators and noise measurement. M., "Energy", 1968.

17. Broadband radio transmitting devices. Under. ed. O.V. Alekseeva, M., "Communication", 1978.

Claims (1)

A response jamming device for radar stations, comprising a receiving antenna in series, an input switch, a high-frequency broadband amplifier (UHF), a splitter, N outputs of which are connected to inputs of N-input band-pass filters, N frequency channels, which include a series-connected detector, the input is connected to the output of the corresponding input band-pass filter, and the video amplifier, as well as the output of the UHF, the output is connected to the input of the transmitting antenna, the control unit and synchronization (BEAD), the first output of which is connected to the control input of the input switch, a time interval measurement unit with a signal selector for a pulse repetition period with N inputs, each of which is connected to the output of a video amplifier of the corresponding frequency channel, and with N outputs connected each to one of the first inputs of the BUS, corresponding to this frequency channel, characterized in that it includes a signal selector for pulse widths connected to the output of the video amplifier, respectively about the frequency channel with N inputs and N outputs - to the second inputs of the BUS as part of a time interval measurement unit, an electronically controlled switching matrix (EUPM) of the NxM receiver, the information inputs of which 1 ... N are connected to the outputs of the input bandpass filters, the EUPM of the NxM transmitter, the information outputs of which 1 ... M are connected to the inputs of the output of the UHF, encoding and decoding devices, a communication channel including a transmission path connected in series, the input of which is connected to the output of the encoding device, a communication line and the receiving path, the output connected to the input of the decoding device, the block of reference frequency generators of the receiver, the control inputs of which are connected to the fourth outputs of the BUS, the block of reference frequency generators of the transmitter, the control inputs of which are connected to the outputs N + 1 of the decoding device, M frequency channels of the receiver, including each series-connected mixer of the subsystem for determining the frequency of the signal, connected by the first input to the corresponding output 1 ... M of the receiver matrix, and the second input to the corresponding m output of a block of reference frequency generators of the receiver, an intermediate frequency amplifier, a frequency discriminator, and an analog-to-digital converter connected by an output to the corresponding information input of the encoding device, the control inputs of which are connected to the fifth, sixth, and seventh outputs of the bus, as well as N frequency channels of the transmitter, including each series-connected synthesized frequency generator, the control input of which is connected to the output 1 ... N of the decoding device, a mixer of the subsystem adjusting the signal frequency, connected by the second input to the output 1 ... N of the block of reference frequency generators of the transmitter, a bandpass filter, a preliminary UHF, balanced modulator, the first input of which is connected to the output of a preliminary UHF, an output bandpass filter connected to an input 1 ... N transmitter EUPM, as well as a modulating signal generating device, connected to the second input of the balanced modulator by an output and including a noise generator in series and a pulse generator, the control inputs of which are connected to the outputs N + 2 and N + 3 of the decoding device corresponding to a given frequency channel, the remaining outputs of which are connected by the control signal: N + 4 and N + 5 - with the output ECM, and N + 1 - with a block of reference frequency generators, whereby the N second and M third outputs of the BUS are connected respectively to N + 1, ..., 2N and 2N, ..., 2N + M by the control inputs of the input ECM.