Radio-technical reconnaissance station

FIELD: radio engineering, possible radio-technical reconnaissance of radio-electronic means of enemy.

SUBSTANCE: radio-technical reconnaissance station contains antenna device 1, receiver 2, bearing device 3, analyzer 4 of received signal parameters, device 5 for memorizing and processing received information, telemetric device 6, receiving antennae 7-9, block 10 for readjustment, first 11 and second 23 heterodynes, mixers 12-14 and 24, amplifiers 17-19 of first intermediate frequency, detector 20, first 21 and second 31 delay lines, key 22, amplifier 25 of second amplification frequency, multipliers 26,27 and 30, narrowband filters 28,29 and 32, phase detector 33, phase meters 34 and 35, engine 15 and supporting generator 16.

EFFECT: expanded area of reconnaissance and increased number of detected radio-electronic means due to positioning of radio-technical reconnaissance station onboard the helicopter.

3 dwg

 

The proposed station relates to the field of radio and allows technical intelligence electronic devices (red) enemy (radar, radio communications and control, and others).

Known station and electronic intelligence system radio emissions of the enemy (patent RF №2150178; U.S. patent No. 3.806.926, 3.891.989, 3.896.439; German patent No. 3.346.155; UK patent No. 1.587.357; French patent No. 2.447.041; akin S.A., LEV Shustov. The basics of jamming and electronic reconnaissance. M: Owls. radio, 1968, s, fig.10.2 and others).

Known stations and systems closest to the proposed station is electronic intelligence (wakin S.A., LEV Shustov. The basics of jamming and electronic reconnaissance. M: Owls. radio, 1968, s, fig.10.2), which was chosen as the standard.

This station contains consistently included antenna device 1, the receiver 2, the analyzer 4 parameters of the received signal, the device 5 storing and processing the received information, the second input is via a direction-finding device 3 is connected to the output of the receiver 2, and a telemetry device 6 whose output is the output station (figure 1).

The disadvantage of this station is bounded area of exploration.

An object of the invention is the extension of the exploration area is the number of scout radio-electronic means by placing station radio intelligence onboard the helicopter.

The problem is solved in that in the electronic reconnaissance containing the direction-finding device and consistently included antenna device, the receiver, the analyzer parameters of the received signal, the device memory and information processing and telemetry unit whose output is the output station, the receiver is made in the form of cascaded receiving antenna, the first smectites, the second input is via the first local oscillator coupled to the output block of perestroika, the amplifier of the first intermediate frequency, the detector, the second input is through the first delay line connected to its output, a key, a second input connected to the output of the amplifier, the first intermediate frequency, a second smectites, a second input connected to the output of the second local oscillator, and amplifier of the second intermediate frequency, the output of which is output to the control input of the block adjustment is connected to the output of the detector, the direction-finding device is made in two direction-finding channels, each of which consists of cascaded receiving antenna, smectites, a second input connected to the output of the first local oscillator, amplifier first intermediate frequency, multiplier, a second input connected to the output of the amplifier watts is Roy intermediate frequency, and notch filters, the output of the first notch filter connected in series, a third multiplier, a second input connected to the output of the second narrowband filter, the third narrowband filter and the first phase meter, the output of the second notch filter connected in series, a second delay line, a phase detector, a second input connected to the output of the second narrow-band filter, and a second phase meter, the second inputs of the phase meter connected to the output of the reference oscillator, and outputs connected to the device memory and processing the received information, the antenna device includes three receiving antennas, the receiving antenna of the receiver is placed over the sleeve of the rotor helicopter, the receiving antenna direction-finding devices placed on the ends of the main rotor blades of a helicopter, the engine is kinematically connected with the rotor helicopter and the reference generator.

The structural scheme of the proposed station electronic reconnaissance are presented in figure 2, the geometric arrangement of the receiving antennas on the helicopter is shown in figure 3.

The receiver 2 has consistently enabled receiving antenna 7, the first smesitel 12, the second input is via the first local oscillator 11 is connected to the output of block 10 of perestroika, the amplifier 17, the first intermediate frequency, the detector 20, the second input is which through the first delay line 21 is connected with its output, the key 22, a second input connected to the output of the amplifier 17, the first intermediate frequency, a second smesitel 24, a second input connected to the output of the local oscillator 23, and the amplifier 25 of the second intermediate frequency, the output of which is the output of the receiver 2 and is connected to the analyzer input 4 parameters of the received signal.

Direction-finding device 3 contains two direction-finding channel, each of which contains consistently included receiving antenna 8 (9), smesitel 13 (14), a second input connected to the output of the local oscillator 11, the amplifier 18 (19) of the first intermediate frequency, a multiplier 26 (27), a second input connected to the output of the amplifier 25 of the second intermediate frequency, and a narrow-band filter 28 (29). The output of the first notch filter 28 connected in series, the third multiplier 30, a second input connected to the output of the second notch filter 29, the third narrow-band filter 32 and the first phase meter 34, the output of the second notch filter 29 are connected in series, a second delay line 31, the phase detector 33, a second input connected to the output of the narrowband filter 29, and the second phase meter 35. The second inputs of the phase meter 34 and 35 connected to the output of the reference oscillator 16, and outputs connected to the device 5 storing and processing the information received. The antenna device is 1 contains three receiving antennas 7-9, receiving antenna 7 of the receiver 2 is placed over the sleeve of the rotor helicopter, the receiving antenna 8 and 9 direction-finding device 3 is placed at the ends of the main rotor blades of the helicopter (figure 3). The engine 15 kinetically connected with the rotor helicopter and the reference generator 16.

Station electronic reconnaissance works as follows.

The station is on Board the helicopter. The presence of the rotating propeller of the helicopter is used to determine the direction for emitting RES using the antenna device 1, the receiving antennas 8 and 9 which are located at the ends of the main rotor blades (figure 3).

Accept antennas 7-9 signals, such as phase shift keying (QPSK)

where U1U2U3the amplitude of the signal RES;

ωC- carrier frequency signal RES;

φ - the initial phase of the signal RES;

twith- the duration of the signal RES;

±Δω - instability of the carrier frequency signal, due to various destabilizing factors;

ϕk(t)={0,π} - manipulated component phases, reflecting the law of phase manipulation in accordance with a modulation code;

R is the radius of the circle, where the receiving antenna 8 and 9;

Ω=2πR - speed rotations is of receiving antennas 8 and 9 around the receiving antenna 7 (the speed of rotation of the rotor helicopter);

α - bearing (azimuth) on the radiant RES,

come to the first inputs of mixers 12-14, at the second input of which is supplied a voltage of the first local oscillator 11 linearly measured frequency

where- the rate of change of the lo frequency.

It should be noted that the search for QPSK signals RES opponent in a given frequency range Dfby using block 10 of perestroika, which periodically with period TPby sawtooth law changes the frequency ωG1lo 11. As block 10 realignment can be used sawtooth generator.

At the output of the mixers 12 to 14 are formed of the voltage of the combined frequencies. Amplifiers 17-19 stand out voltage of the first intermediate frequency:

where

To1- gain mixers;

ωPR1CG1the first intermediate frequency;

ϕPR1WithG1.

The voltage UPR1(t) from the output of the amplifier 17, the first intermediate frequency is supplied to at the od of the detector 20. When the detection signal RES at the output of the detector 20, you receive a DC voltage is supplied to the control input unit 10 realignment turning it off, on control input key 22, opening it, and to the input of delay line 21. The key 22 in the initial state is always closed. Time delay τ3the delay line is chosen such that it was possible to identify the detected QPSK signal, and to analyze its parameters.

When you turn off the unit 10 realignment amplifiers 17-19 there are the following voltage:

The voltage UP(t)from the output of the amplifier 17, the first intermediate frequency via a public key 22 is supplied to the first input of the mixer 24, the second input of which is applied the voltage of the second local oscillator 23 with a stable frequency ωT2

At the output of mixer 24 produces a voltage Raman frequencies. The amplifier 25 selects the voltage of the second intermediate frequency

where

ωAC2PR1T2the second intermediate frequency;

ϕAC2PR1T2,

which arrives at the analyzer input 4 parameters accept si is Nala, where are the duration τ3elementary parcels, from which is composed the QPSK signal, the number N (Tc=N τeand the law of phase manipulation.

The voltage UP(t) from the output of the amplifier 25 of the second intermediate frequency is simultaneously supplied to the second inputs of the multiplier products 26 and 27 direction-finding channels to the first input of which receives the voltage UWP5(t) and UP(t) with the outputs of the amplifiers 18 and 19 of the first intermediate frequency, respectively. The outputs of multiplier products 26 and 27 are formed fazokodirovannymi (FM) voltage of stable frequency ωT2the second lo:

where

To2- transfer coefficient multiplier products that stand out narrowband filters 28 and 29 frequency settings ωHG2.

The signs "+" and "-" before the value ofcorrespond to diametrically opposite locations of the antennas 8 and 9 at the ends of the main rotor blades of the helicopter relative to the receiving antenna 7, is placed over the sleeve of the rotor helicopter.

Therefore, useful information about the Peleng α is transferred to the stable frequency ωT2the second local oscillator 23. Therefore, the instability #x000B1; Δω carrier frequency due to various destabilizing factors, and type of modulation (manipulation), the received signal RES not affect the outcome of the bearing, thereby increasing the accuracy of the positioning of REFs.

The amount included in the composition of these fluctuationsand called the index of phase modulation, characterized by the maximum value of deviation of the phase of signals received by the rotating antennas 8 and 9 relative to the phase of the signal received fixed antenna 7.

Direction-finding device 3 the more sensitive to changes in angle α, the larger the relative size of the measurement phase R/λ. However, with increasing R/λ decreases the value of the angular coordinate αin which the phase difference exceeds a value of 2πi.e. comes the ambiguity of the reference angle α.

Hence, whencomes the ambiguity of the reference angle α. Elimination of the mentioned ambiguity by reducing the ratio ofusually not justified, because in this case you lose the main advantage of shirokobokova system. In addition, in the range of VHF and especially UHF waves to take small values ofoften fails due to design considerations.

the La increase the accuracy of the measurements of REFs in the horizontal (vertical) plane of the receiving antennas 8 and 9 are placed on the ends of the main rotor blades of the helicopter. The mixing of signals from two diametrically opposite receiving antennas 8 and 9, located at the same distance R from the axis of rotation of the rotor causes phase modulation obtained by using a single receiving antenna, rotating in a circle, the radius R is twice more (R1=2R).

Indeed, at the output of multiplier 30 is formed harmonic voltage

where

index phase modulation

given a narrow-band filter 32 and is supplied to the first input of the phase meter 34, the second input of which is applied the reference voltage generator 16

U0(t)=U0·cos Ωt.

Phase meter 34 provides accurate but ambiguous measurement of the angular coordinates α.

To resolve the resulting ambiguity of reference angle α it is necessary to reduce the index of phase modulation without reducing relations. This is achieved by using autocorrelator consisting of a delay line 31 and the phase detector 33, which is equivalent to reduction of the index of phase modulation to the value

where d1<R.

Output autocorrelator formed voltage

c indecomposable modulation Δ ϕm2coming to the first input of the phase meter 35, to the second input receives a voltage U0(t) of the reference oscillator 16. Phase meter 35 provides a rough, but unambiguous measurement of angle α.

The minimum distance R0from the RES to the rotor helicopter is determined from the expression

Fg(t)≈(V2·t2)/(λ·R0),

where Fg(t) is the Doppler frequency shift;

V= Ω·R;

λ - wavelength.

The Doppler frequency shift is measured in the analyzer 4 parameters of the received signal, which is determined by the R0. Last recorded in the device 5 storing and processing the information received.

The location of the RES is defined in the device 5 for measured values α and R0.

Telemetry device 6 is used to transmit intelligence information to the control point.

At the end of time τCthe constant voltage output from the delay line 21 is fed to the control input of the detector 20 and dumps its contents to zero. The key 22 is closed and the block 10 adjustment is enabled, i.e. they must be in their original position.

When the detection signal following the RES of enemy work station electronic reconnaissance is similar.

The trajectory of the helicopter is and, on Board which is placed a radio station exploration, usually laid in the border areas without violating the airspace of the enemy and without complications diplomatic character.

Thus, the proposed station radio intelligence compared to the baseline provides an extension of the exploration area and the number of scout radio equipment. This is achieved by placing station radio intelligence onboard the helicopter, the flight path which is laid in the border areas without violating the airspace of the enemy and without complications diplomatic character.

The proposed station radio intelligence provides accurate and unambiguous determination of the location of REFs. This direction-finding device is invariant to the type of modulation (manipulation) and instability of the carrier frequency of the received signal RES.

Station electronic reconnaissance containing the direction-finding device and consistently included antenna device, the receiver, the analyzer parameters of the received signal, the device memory and information processing and telemetry unit whose output is the output station, wherein the receiver is made in the form of a series who's receiving antenna, the first mixer, the second input is via the first local oscillator coupled to the output block of perestroika, the amplifier of the first intermediate frequency, the detector, the second input is through the first delay line connected to its output, a key, a second input connected to the output of the amplifier, the first intermediate frequency, a second mixer, a second input connected to the output of the second local oscillator, and amplifier of the second intermediate frequency, the output of which is output to the control input of the block adjustment is connected to the output of the detector, the direction-finding device is made in two direction-finding channels each of which consists of cascaded receiving antenna, mixer, a second input connected to the output of the first local oscillator, amplifier first intermediate frequency, multiplier, a second input connected to the output of the amplifier of the second intermediate frequency, and notch filters, the output of the first notch filter connected in series, a third multiplier, a second input connected to the output of the second narrowband filter, the third narrowband filter and the first phase meter, the output of the second notch filter connected in series, a second delay line, a phase detector, a second input connected to the output of the second is capolongo filter, and the second phase meter, the second inputs of the phase meter connected to the output of the reference oscillator, and outputs connected to the device memory and processing the received information, the antenna device includes three receiving antennas, the receiving antenna of the receiver is placed over the sleeve of the rotor helicopter, the receiving antenna direction-finding devices are located at the ends of the main rotor blades of a helicopter, the engine is kinematically connected with the rotor helicopter and the reference generator.



 

Same patents:

FIELD: radio communications.

SUBSTANCE: system has transmitting portion, which contains clock pulse generator 1, first and second D-code generators 21-22, first and second generator of double frequency manipulation 31-32, adder 4, modulator 5, frequencies synthesizer 6, pseudo-random numbers generator 7. said portion is connected through broadcast line 8 to receiving portion, which has demodulator 9, frequencies synthesizer 10, pseudo-random numbers 11, signals selector 12, clock pulses generator 13, block for selecting additional series 14, block for folding additional series 15, solving block 16. new set of significant features provides for possible implementation of distributed receipt with code structure of specific orthogonal quadruple-encoded series without expansion of available frequency resource.

EFFECT: broader functional capabilities, higher trustworthiness, higher efficiency, higher interference resistance.

2 cl, 5 dwg

FIELD: espionage protection techniques.

SUBSTANCE: method includes serial scanning of target surface by nonlinear locator, recording and processing received response in PC with displaying of positions of semiconductor devices. In case of appearance of response on target surface on command from PC visible laser is enabled, response points are lighted by it, pictured using digital camera and recorded in PC. Responses are process in conjunction with target surface image and integral picture of responses is built. On basis of received picture additionally visually detected are potentially possible places for placing semiconductor devices, and also trajectories of tracing of communications on target surface, structures of inbuilt metal construction and anomalies in said structures.

EFFECT: higher precision, higher efficiency, broader functional capabilities.

1 dwg

FIELD: methods for protection of an active radar against antiradar missiles.

SUBSTANCE: in the method and device for protection of radar against antiradar missiles accomplished are radiation of sounding signals, detection of antiradar missiles, guidance of anti-aircraft missiles on the antiradar missile, destruction of the anti-radar missile by blasting of the warhead of the anti-aircraft missile, guidance of the anti-aircraft missile at least during a time period directly preceding the blasting of the warhead of the anti-aircraft missile, all this is conducted on the trajectory passing in the vicinity of the imaginary line connecting the antiradar missile and the radar, in this case constantly are determined the distance from the radar to the antiradar missile Dr-arm, from the radar to the anti-aircraft missile Dr-aacm and from the anti-aircraft missile to the antiradar missile Daacm-acm, and at the time moments leading the moments of radiation of the radar sounding signal by value t=(Dr-aacm+Daacm-arm-Dr-arm)/v, where v - velocity of light, commands are given from the radar to the anti-aircraft missile for radiation of a signal simulating the radar signal.

EFFECT: reduced dynamic errors of guidance of anti-aircraft missile on antiradar missile.

3 cl, 6 dwg

FIELD: radio engineering; secret intelligence protected radio communication systems.

SUBSTANCE: proposed radio communication system incorporating provision for suppressing enemy's radio communication means and radio control channels has information subsystem, noise jamming subsystem, noise memory subsystem, information subsystem elements, and subsystem elements interface unit; each element of information subsystem is made in the form of multichannel time-division radio station; each element of noise jamming subsystem is made in the form of time division multichannel radio station, and each of noise jamming subsystem elements is made in the form of barrage jamming transmitter built around noise signal generating driver; used as drivers are self-stochastic generator operating in different frequency bands.

EFFECT: enhanced intelligence protection of communication channels, simplified design, enhanced reliability.

2 cl, 13 dwg

FIELD: technologies for preventing interception of data.

SUBSTANCE: transferred signal is concealed via adding noises to communication line in speech frequency range with linear addition of speech data signal with noise signal of higher level. Concealment is removed via adaptive filtration of received signal with compensation of noise component and separation of data component. Addition of noises to communication line is performed from the side of sensor. Noise signal during addition of noises and adaptive filtration is formed of a sum of counts of several noise series with nonevent sizes via their random querying. At the beginning of each communication session a signal is sent to side of receiver, characterizing order of querying of series, and starting signal, providing for synchronism of noises addition and filtering processes. All operations are performed by means of microprocessors, mounted on both sides of communication line, dependently of loaded software providing for change of direction of transmission and protection of speech data signal. Invention allows to simplify protection while providing for absolute confidentiality of transmitted data.

EFFECT: higher reliability.

6 cl, 4 dwg

The invention relates to the field of radio and allows for electronic protection of ships through the creation of sighting frequency and direction pulse and the masking noise enemy radioelectronic facilities

The invention relates to the field of radio and can be used for the jamming pulse-Doppler and pulsed radar (radar)

The invention relates to communication technology and can be used to protect information processed by technical means from leaking through the side channels of electromagnetic radiation and interference

The invention relates to the field of radio and can be used in the development of new and modernization of existing plants interference to radio communications

The invention relates to the field of optics, in particular to devices for the protection of verbal information from closed spaces from eavesdropping and recording using laser acoustic location systems

FIELD: the invention refers to the technique of processing signals of radiolocation stations.

SUBSTANCE: the essence of the invention is in providing controlled intensification, frequency transformation, disintegration on quadrature components, analog-digital conversion of signals, providing identity of amplitude and phase characteristics of an imaginary and a real component of a signal, digital oscillating, storing, optimal filtration (compression of phase-code-manipulated signals) entering from a high frequency receiver.

EFFECT: expansion of functional possibilities and improving main technical parameters of a radiolocation station.

3 dwg

FIELD: procedure of processing of radar signals.

SUBSTANCE: the device has the first and second receiving channels. The first receiving channel includes device of quadrature phase detection A1 and preliminarily processing device A3, quadrature phase detection device A1 of the first channel has an adder, amplifier unit with a time automatic gain control, the first and second frequency mixers, the first and second operational amplifiers, the first and second voltage comparators, the first and second low-pass filters, the first and second integrators, the first, second monitory circuit and a serviceability signal formation circuit. In its turn preliminarily processing device A3 of the first channel consists of the first and second analog-to-digital converters, the first and second digital-to-analog converters, digital heterodyning device, permanent storage of the digital heterodyning device, the first and second reversible counters, the first and second N-digit counter-type adders, the first and second multiplexers, write address driver, the first and second internal storages of every-period processing, read address driver, the first and second optimum filters, reference signal conditioner, first and second microcircuits FiFo ("first entered, first left"), control device, the first and second switches. The second receiving channel has quadrature phase detection device A2 and preliminary processing device A4, which schematically-structurally are made similarly to quadrature phase detection device A1 of the first channel and preliminary processing device A3 of the first channel. The radio receiving device of the coherent radar with optimum filtration signal includes the first and second decoders, crystal oscillator, level converter, frequency divider, band-pass filter, differentiating circuit, integrating circuit, the first and second tuned amplifiers, the third and fourth multiplexers and a signal synchronizer. The device also has a connector of the first channel input signal, connector of the input reference signal, connector of the second channel input signal, contact of the pulse for formation of the strobe pulse of antenna re-tuning, contact of the trigger signal the transmitter final stage, contact of the signal determining the phase of the transmitter trigger pulse, contact of the signal determining the phase of the transmitter trigger pulse, contact of the signal of the receiver blanking pulse, contact of the pulse accompanying the main signal, contact of the pulse of transmission beginning, connector of the output signal of the imaginary component, and a parallel information line.

EFFECT: expanded functional potentialities and improved basic technical characteristics of the radar parameters.

2 dwg

FIELD: a radar receiver with a large dynamic range by intermodulation of the third order refers to the field of radiolocation and may be used in radar stations in quality of a radar receiver.

SUBSTANCE: a radar receiver with a large dynamic range by intermodulation of the third order has an amplifier of high frequency, a high frequency filter, a second amplifier of high frequency and a second high frequency filter, an attenuator, a mixer, a diplexer filter, a preliminary low-noise amplifier of an intermediate frequency, a filter of an intermediate frequency on surface acoustic waves, a second low-noise amplifier of an intermediate frequency. A phase detector, an analogous-digital amplifier connected one after another and a filter of an oscillator's signal switched between the output of an amplifier of an oscillator's voltage and the second of the input of the mixer besides the mixer is fulfilled as a mixer of high level.

EFFECT: expansion of the dynamic range of the receiving track by intermodulation of the third order.

4 dwg

FIELD: mining industry.

SUBSTANCE: method includes continuous calculation of possibility distribution function of signal amplitude with noise, value of amplitude with noise is determined from it, matching minimum of this function, which is then taken as threshold level. This allows automatic adjustment of threshold level for different amplitudes of signal and noise, that is important for receiving information from deep wells along long communication lines with high level of broadband interference.

EFFECT: higher precision.

3 dwg

The invention relates to radar technology, namely to design the microwave part of the small active radar homing head (AGSN)

The invention relates to the field of radar and can be used in radar

The invention relates to techniques for signal processing radar (radar)

The invention relates to receivers, radio communication and navigation, including the use of pseudotumour signals with phase or frequency shift keying

The invention relates to a pulse technique and can be used in measuring devices, range finders to determine the duration of the signal, as well as in systems where it is necessary to define a small temporary misalignment between single pairs of pulses

The invention relates to the field of ground penetrating radar, and in particular to methods of identifying objects by probing condensed matter frequency-modulated continuous electromagnetic radiation
Up!