Systems of measurement based on relative movement of target (G01S13/50)

ethod for determining location of a quasi-continuous broadband source of radio-emission by mobile complex of radio-technical supervision // 2645297
FIELD: radio engineering and communication.SUBSTANCE: invention relates to radio engineering and can be used in the development of multi-position complexes of radio technical supervision. Method consists in: receiving a quasi-continuous broadband signal by antenna array at each receiving position of the radio technical supervision complex, forming intervals of observation with duration tsup., on which the correlation matrix of signals Rxx(m) of the input realization of a quasi-continuous wideband signal is calculated according to a certain formula, calculating a difference correlation matrix of signals ΔRxx(m) = Rxx(m)-Rxx(m+l), calculating the determinant of the difference correlation matrix with the subsequent formation and normalization of dependence for constructing position lines; calculating the correlation function of dependence by the corresponding formula, determining the path difference for each position with respect to the maximum of the enveloping mutual correlation function by the system of mutual correlation processing, estimating the coordinates of the source of quasi-continuous broadband signal by the time difference method on the basis of analysis of the time dependence of the determinant of the difference-correlation matrixes of the signals generated in the elements of the antenna arrays at receiving points of the radio technical supervision complex.EFFECT: achieved technical result of the invention consists in improved accuracy of positioning the sources of a quasi-continuous wideband signal by a complex of radio-technical supervision and reduced time required to locate sources of radio emission.1 cl, 5 dwg

ethod of multistage filtration for auto support systems // 2616188
FIELD: radio engineering, communication.SUBSTANCE: signal coordinates of observation status is input to the multi-stage filter, which is a series of serially connected incremental dimension filters (n≥2) each of which forms the estimates used in the following as the measurement filter, according to the corresponding algorithm.EFFECT: provision of support unstalled intense maneuvering targets with high precision estimation of derivatives of the third and fourth order with a small number of measuring instruments used.6 dwg

ethod for coordinate identification of objects // 2591044
FIELD: radar and radio navigation.SUBSTANCE: invention relates to radio electronics and can be used in designing means of complex survey objects. Technical result is achieved by the fact that a probability of mineral and false estimates of coordinates, as well as dispersion deviation false estimates from extrapolated estimates of coordinates in the first channel, which are used to specify the extrapolated coordinate estimates in both channels and parameter identification. Updating extrapolated estimates of coordinates and parameter identification is achieved as a result of the weight of combining extrapolated estimates, calculated at the hypothesis on the appearance of estimates of coordinates with similar evaluations calculated at the hypothesis on occurrence of false estimates of coordinates with known statistical characteristics.EFFECT: high reliability of identification of objects due to specify extrapolated estimates of coordinates in both channels and parameter identification using additionally determined probability of occurrence of and false estimates of coordinates, as well as dispersions of deviation of false estimates from extrapolated estimates of coordinates in the first information channel.1 cl, 2 dwg
Detection method of target route and false route formed with synchronous repeater jamming (versions) // 2534754
FIELD: radio engineering, communication.SUBSTANCE: in a detection method of a target route and a false route formed with synchronous repeater jamming in space between its jammer and radar station (RS), which is based on wobbling of a repetition period of sounding signals, there set at wobbling are two strobes: one for signals of the expected false route and the other one for signals of the expected target route; a decision is taken on the route being checked depending on a strobe in which a signal has been received, and if the signal has been received in both strobes, a decision is taken on the fact that it is a target route protected by a false route. The achieved technical result as per the second version - detection of a false route and a target route at occasional use of variation of RS signal parameters. The above result is achieved by the fact that in the detection method of the target route and the false route formed with synchronous repeater jamming in space between its jammers and RS, based on variation of parameters of sounding signals at neighbouring sounding intervals, there preserved is a possibility of receiving signals of the preceding sounding interval, and a decision is taken on the route being checked: a false route if there has been received a signal with parameters of the preceding sounding interval; a target route if there has been received a signal with parameters of the current sounding interval; a target route protected by a false route if there have been received signals with parameters of the preceding and the current sounding intervals.EFFECT: avoiding overload of devices at detection of target routes and false routes.2 cl

Coherent-pulse radar set // 2503972
FIELD: radio engineering, communication.SUBSTANCE: coherent-pulse radar set comprises the following components connected to each other in a certain manner - a modulator, a power amplifier, a reception-transmission switch, four mixers, two amplifiers of intermediate frequency, four pole filters, two detectors, two accumulators, a clock oscillator, a generator of intermediate frequency, a transceiving antenna, a threshold device, a unit of intermediate frequency doubling, a subtraction unit, a filter of differential frequency, a filter of summary frequency, a phase changer by 90°, two multipliers, a key, a phase detector and a recording unit.EFFECT: higher sensitivity and accuracy of detection of a moving target by determination of value and sign of Doppler frequency under its low values.3 dwg

ethod of tracking path of moving ship // 2499278
FIELD: radio engineering, communication.SUBSTANCE: method involves radar measurement of coordinates of the ship at the present moment in time and then smoothing parameters of the path of the ship using an α-β filter. In order to select smoothing coefficients α and β, a procedure for simulating tracking of the ship at different values of α and β is performed, wherein the selected values of smoothing coefficients provide minimum mean-square deviation of the difference between current measurements of the coordinates of the ship and values calculated when simulating tracking.EFFECT: high accuracy of estimating current coordinates and the velocity vector of a ship when movement thereof includes areas of both rectilinear uniform and manoeuvring movement.3 dwg

Target class recognition method and device for realising said method // 2492501
FIELD: radio engineering, communication.SUBSTANCE: method is realised by enabling recognition of the class of a target by analysing the value of the signal β=Δτ0/τ3, wherein if β satisfies inequalities β>β1, β≤β2, the target is considered small, if β>β1 and β≤β3, the target is considered medium, if β>β3 the target is considered large; the class of the target is determined based on analysis of the value of the signal β=Δτ0/τ3 wherein if β satisfies the inequalities β>β1, β≤β2, the target is considered small, if β>β1 and β≤β3, the target is considered average, if β>β3 the target is considered large; said inequalities uniquely determine the class of a target at the following values β1=0.05, β2=0.25 and β3=0.40. The device which realises the method includes a transmitter, an antenna switch, an antenna, a receiver, a recognition channel, a target class determination unit, a "small target" indicator, a "medium target" indicator, a "large target" indicator, made and connected to each other in a certain manner.EFFECT: more information value.2 cl, 1 dwg

ethod of phasing radio signals // 2489729
FIELD: radio engineering, communication.SUBSTANCE: method of phasing radio signals emitted from spaced-apart points of a moving object, with action of said signals on radar stations with target selection according to speed, can be used in a radar station. The method is realised by generating, at each of said points of the object, paired signals and successively emitting said signals; frequency shifting between signals in a pair is carried out equal to the first intermediate frequency of the receiver of the radar station; when relaying a radio signal received from the radar station, frequency shift of each pair is carried out by the same value with separate selection of upper side and lower side frequencies, thereby introducing a direct detection mode into the radar station and maintain coherence and phase opposition of the signals; the dephasing action of the reflected signal is prevented by frequency deviation and overlapping the received oscillation with narrow-band noise.EFFECT: high efficiency of phasing.4 dwg

ethod of selecting moving targets and device for realising said method // 2470320
FIELD: physics.SUBSTANCE: inventions relate to radar. Disclosed is a method for three-pulse selection of moving targets with a variable pulse separation, wherein the correlation function of differences of received pulses and is determined, where and are first, second and third received pulses, respectively, in complex form, k is the increment number on range, with one of the received pulses normalised to the mean-square value of the modulus of that pulse, i=1, 2 or 3 is the number of the received pulse: wherein averaging is carried out on the range interval equal to a predetermined interval of stationarity of the moving extended passive jamming. The central increment of the averaging interval is not considered. The output signal is determined in the form . The disclosed device has a quadrature phase detector, an analogue-to-digital converter, three storage devices, three delay units and five computers, connected to each other in a certain manner.EFFECT: suppressing passive jamming in form of signals reflected from passive jamming sources, which simultaneously include fixed extended and/or point and moving extended reflecting objects.2 cl, 3 dwg

Systems and methods of attenuation of impact of wind turbines on radar // 2457359
FIELD: power industry.SUBSTANCE: control system includes transmitter provided with possibility of determining the data on operating mode of radar system, processor provided with possibility of receiving the data on operating mode of wind turbine and determining the sequence of change of wind turbine rotation mode based on the data on operating mode of radar system and on operating mode of wind turbine, and controller provided with possibility of ensuring the use of sequence of change of rotation mode with respect to wind turbine. Method of attenuation of impact of wind turbine on radar system consists in determination of the data on operating mode of radar system by means of transmitter, receipt of the data on operating mode of wind turbine and change of operating mode of wind turbine based on the data on operating mode of radar system and on operating mode of wind turbine.EFFECT: inventions allow attenuating the interference occurring at operation of radars of civil and military aviation, which are located near wind turbines.20 cl, 5 dwg

Abstract // 2449309
FIELD: radio engineering.SUBSTANCE: method consists in making it possible to detect a target class on the basis of analysis of a signal value β=Δθt/θA, at the same time if β corresponds to inequalities β>β1, β≤β2, the decision is made that the target is small, if it corresponds to inequalities β>β2 and β≤β3, the decision is made that the target is medium, if it corresponds to the inequality β>β3, the decision is made that the target is large. To realise the method, the device comprises a unit of target class detection and an indicator "small target", an indicator "medium target", an indicator "large target". The first output of the transmitter, the output of the receiver and the second output of the recognition channel are accordingly connected with the first, second and third inputs of the target class detection unit, the first, second and third outputs of which are accordingly connected to inputs of the indicator "small target", the indicator "medium target", the indicator "large target", the unit of target class detection comprises a distance meter, the first, second, third and fourth threshold devices, the first, second, third and fourth NOT elements, the first, second elements AND, the first, second and third keys, a signal setter.EFFECT: improved information value.2 cl, 1 dwg

ethod of detecting angular coordinate-extended target and device for realising said method // 2410714
FIELD: physics, radio.SUBSTANCE: invention relates to systems for detecting an object by reflecting radio waves from its surface. The technical result is achieved due to possibility of detecting an angular-coordinate extended target by measuring the antenna beam width ΘA is a target ΘT is present, determining the increase in the antenna beam width ΔΘT=Θt-ΘA, determining the ratio β=ΔΘT/ΘA, where β≥0.01 indicates an angular coordinate-extended target and β<0.01 indicates an angular coordinate-point target. To realise this method, the device has a scanning unit which is mechanically connected to an antenna and the detection channel has series-connected intermediate frequency amplifier, an antenna beam width ΘA measuring device for generating a signal proportional to the antenna beam width ΘT, a subtractor for generating a signal proportional to the value ΔΘT=Θt-ΘA, a divider for generating a signal proportional to the ratio β=ΔΘT/ΘA and a threshold device, where the input of the intermediate frequency amplifier is connected to the output of a mixer, while the first and second outputs of the threshold device are outputs of the detection channel, respectively, for an angular coordinate-extended target for β≥0.01 and an angular coordinate-point target for β<0.01.EFFECT: higher information content.2 cl, 1 dwg

ethod of detecting range-extended target and device for realising said method // 2410713
FIELD: physics, radio.SUBSTANCE: invention relates to systems for detecting objects by reflecting radio waves from the surface of said objects and can be used in radio location to detect a range-extended target. The technical result is achieved due to possibility of detecting a range-extended target by measuring duration of a signal reflected from a target τ0, determining the increase in duration of the reflected signal Δτ=τ0-τp, where τp is duration of the probing signal, determining the ratio β=Δτ0/τp, where β≥0.01 indicates a range-extended target and β < 0.01 indicates a point target. The device which realises said method has a transmitter, an antenna switch, an antenna, a receiver and a detection channel connected in a certain way. The transmitter has a modulator, a microwave oscillator and a first switch; the detection channel has a first delay line, a second switch, a mixer, an intermediate frequency amplifier, a signal duration measuring device, a subtractor, a divider and a threshold device. Components of the transmitter and the detection channel are connected to each other and the rest of the components of the detector in a certain way.EFFECT: increase in information content.2 cl, 1 dwg

Radar system with prediction of missing targets in doppler resection zones // 2408030
FIELD: physics.SUBSTANCE: system has a radar unit, an indicator device whose first input is connected to the first output of the radar unit, a unit for calculating the time for entrance/exit of the target from the scanning zone, whose input is connected to the second output of the radar unit, a unit for calculating parametres of the resection zone, whose input is connected to the second output of the radar unit, and the second output is connected to the second input of the indicator device, a decision unit, whose first input is connected to the output of the unit for calculating parametres of the resection zone, and the second input is connected to the output of the unit for calculating the time for entrance/exit of the target from the scanning zone, an extrapolation unit, whose input is connected to the output of the decision unit and the second output is connected to the third input of the indicator device, a unit for identifying targets, whose first input is connected to the first output of the radar unit and the second input is connected to the first output of the extrapolation unit, the third input is connected to signals of targets from other carriers, and the output is connected to the fourth input of the indicator device.EFFECT: high efficiency of operation of the radar unit and operators servicing the radar unit due to reduced loss of targets in Doppler resection zones.3 dwg

ethod for measurement of angular target co-ordinates and device for its realization // 2317562
FIELD: radio detection and ranging.SUBSTANCE: the device has antenna elevation channel, antennal azimuth channel, reference signal channel, unit for determination of target geometric center, the antenna elevation channel has the first and second antenna feeds, the first subtracting device, the first mixer, the first intermediate - frequency amplifier, the first phase detector, the first power amplifier, and the first antenna servo drive, the antenna azimuth channel has the third and fourth antenna feeds, the second mixer, the second intermediate - frequency amplifier, the second phase detector, the second power amplifier, and the second antenna servo drive, the reference signal channel has a summer, the third mixer, the third intermediate-frequency amplifier, automatic gain control circuit and a local oscillator. The method consists in the fact that the target geometric center is determined in compliance with expressions: φ=φi+(φi-φt)/2 ; β=βi+(βi-βt)/2 , where φi, βi, φt, βt - the angular positions of the initial and terminal points on the target body in the elevation and azimuth planes that are determined at the missile approach by electro-magnetic energy in the target direction in two planes and determination of the angular position of the initial and terminal points on the target body in each plane respectively at the instant of appearance and disappearance of the signal reflected from the target.EFFECT: enhanced accuracy of measurement of the target co-ordinates due to provision of measurement of target co-ordinate relative to the geometric center a length target.5 cl, 4 dwg

ethod for selection of above-water targets // 2311660
FIELD: radar equipment, applicable in pulse radars designed for navigation, aero-space reconnaissance of ships.SUBSTANCE: the method consists in expansion of the class of radars, in which detection and selection of the above-water ships on the background of false targets from the spatially arranged reflectors of the type of clouds of dipole reflectors (atmosphere precipitation, cloud cover, blocks of birds, areas of a disturbed sea surface) and small-sized reflectors of the corner reflector type (inflatable corner reflector, beacon, buoy, sign, barrel, etc.), as well as in reduction of time necessary for taking a decision of the truth of the detected target due to a simultaneous selection of the detected target as an above-water ship and by the criterion "above-water ship-cloud of dipole", and by the criterion "above-water ship-corner reflector" at a multi-frequency sounding with a returning of the carrier frequency to value Δf from sounding to sounding at m frequencies without an additional sounding at a constant carrier frequency.EFFECT: expanded class of radar, reduced time for taking the decision on the truth of detected target.1 dwg

Coherent-pulse radar // 2252430
FIELD: radar engineering; systems for recognizing differences between movable and motionless objects.SUBSTANCE: coherent-pulse radar has modulator 1, power amplifier 2, reception-transmission switch 3, mixers 4, 10, 15, intermediate frequency amplifier 5, bandpass filters 6, 16, detectors 7, 17, storages 8, 18, master oscillator 9, intermediate frequency oscillator 11, receiving-transmitting aerial 12, threshold unit 13, intermediate frequency doubling unit 14, subtracter 19. All the components of device connected together by corresponding couplings.EFFECT: improved precision of detection of moving object; reduced influence of passive error.2 dwg

Doppler radar system // 2009521
The invention relates to radar systems and can be used for receiving the reflected signal information about the object's motion
 
2551275.
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