Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
36 results about "Space-based radar" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Space-based radar refers to space-borne radar systems that may have any of a variety of purposes. A number of earth-observing radar satellites, such as RADARSAT, have employed synthetic aperture radar (SAR) to obtain terrain and land-cover information about the Earth.
Inflatable reflector antenna for space based radars
A space deployable antenna that includes an inflatable envelope, a cylindrical reflector formed on a wall of the envelope, a catenary support frame for maintaining the cylindrical shape of the cylindrical reflector, and a feed array support structure connected to the catenary support frame.
Owner:RAYTHEON CO
In-orbit moving target detecting method with space-based radar and infrared data fusion
InactiveCN106204629AAvoid moving out of the pipelineImprove performanceImage enhancementImage analysisRadar detectionTrack algorithm
The invention discloses an in-orbit moving target detecting method with space-based radar and infrared data fusion. The method includes the steps that when an infrared detecting system is used for detection, background suppression is carried out on each frame in an infrared image sequence by adopting a filtering method based on the morphology, self-adaptive threshold segmentation is carried out on images obtained after background suppression, a single frame detection result is extracted, a multi-frame target is determined through a tracking algorithm, and whether the detection result is a real target or not is judged to obtain the detection result of the multi-frame target; during radar detection, pulse doppler (PD) is adopted for processing. After time calibration and space calibration are carried out on the obtained infrared and radar target information, data fusion is carried out on the information by adopting a measurement fusion method, and track prediction is carried out on fused data to obtain the estimated position of the target.
Owner:XIDIAN UNIV
Wave absorbing and transmitting integrated metamaterial radome and application thereof
ActiveCN107946763AAchieve stealthTo achieve the purpose of absorbingRadiating element housingsOptical elementsDielectric substrateSpace-based radar
The invention relates to a wave absorbing and transmitting integrated metamaterial radome and application thereof, belonging to the field of metamaterials. The radome comprises a dielectric structurelayer, a wave absorbing sandwich layer and a frequency selecting surface layer. The dielectric structure layer comprises first and second dielectric substrates, the first dielectric substrate is arranged on one side of the wave absorbing sandwich layer, the frequency selecting surface layer is arranged on the side of the wave absorbing sandwich layer away from the first dielectric substrate, and the second dielectric substrate is arranged on the side of the frequency selecting surface layer away from the wave absorbing sandwich layer. The radome is provided with a dielectric structure layer, awave absorbing sandwich layer and a frequency selecting surface layer, so that waves can be transmitted in the operating frequency band of the radome; at the same time, the frequency selecting surface reflects the out-of-band electromagnetic waves as a reflecting layer of the wave absorbing sandwich layer to achieve the purpose of absorbing waves, thereby realizing the stealth of a system using atransmitter and a receiver, such as a dual- (multi-) base station radar or space-based radar system. When the radome is used in optical imaging or miniaturized antennas or electromagnetic wave stealth, the wave absorbing and transmitting effect is obvious.
Owner:AEROSPACE SCI & IND WUHAN MAGNETISM ELECTRON +1
System and method for combining displaced phase center antenna and space-time adaptive processing techniques to enhance clutter suppression in radar on moving platforms
InactiveUS20060181451A1Easy to solveThe environment is moreRadio wave reradiation/reflectionRadar systemsSpace-time adaptive processing
A system and method are disclosed for enhancing the suppression of clutter and target detection in a radar system located on a moving platform. For example, a radar system including an MTI subsystem is located on a moving platform (e.g., ship-borne, airborne or space-based radar system) with a DPCA processing unit located nearer to the front end of the radar receiver, and a STAP processing unit located nearer to the back end. The DPCA processing unit provides gross cancellation and suppression of the received clutter signals, and the STAP processing unit provides fine tuning for the clutter suppression process. In other words, the front end DPCA processing unit removes most of the rapidly varying clutter, which gives the back end STAP processing unit a more benign clutter environment to process. As such, using a DPCA processing unit on a space-based radar platform improves system performance, because the space-based platform is relatively stable and not subject to air turbulence or wave motion. Also, using a DPCA processing unit provides independence from clutter statistics, which is important because relatively little empirical clutter data is available from space-based radar platforms. Using a STAP processing unit for clutter suppression on the space-based radar platform provides fine tuning of the suppression process.
Owner:HONEYWELL INT INC
Ground clutter interference real-time suppression method for space-based external radiation source radar
ActiveCN105182300AAdapt to real-time processing needsReduce complexityWave based measurement systemsRadar systemsTarget signal
The invention relates to a ground clutter interference real-time suppression method for a space-based external radiation source radar. The ground clutter interference real-time suppression method comprises the steps of: completing key parameter design of a space-based external radiation source radar system according to transmitting and receiving time sequence requirements for system RF signals; analyzing spatial position and moving relation between a space-based radar platform and an external radiation source, and establishing a space-based external radiation source radar ground clutter mathematical model; constructing a reference signal by utilizing a direct wave signal, carrying out cross-correlation processing on the reference signal and a target signal received by a two-channel echo antenna; eliminating ground clutter interference of correlation result of an nth frame signal of a channel 1 and correlation result of an (n-1)th frame signal of a channel 2 by adopting a two-pulse canceller; and repeating the cross-correlation processing and the two-pulse cancelling steps for carrying out Fourier transform on N frame signals after clutter suppression along a speed dimension to achieve phase-coherent accumulation, and adopting a constant false-alarm criterion to realize target detection. The ground clutter interference real-time suppression method can be used for suppressing clutter interference effectively, reduces complexity of the algorithm, and is convenient to achieve real-time data processing of the space-based platform.
Owner:SHANGHAI RADIO EQUIP RES INST
Multi-frame coherent TBD method for improving envelope shifting compensation and fractional order Fourier transformation
InactiveCN104597434AEfficient detectionAccumulation effect is goodRadio wave reradiation/reflectionSignal-to-noise ratio (imaging)Prior information
The invention discloses a multi-frame coherent TBD method for improving envelope shifting compensation and fractional order Fourier transformation. The multi-frame coherent TBD method comprises the steps of firstly storing multi-frame echo data received by a space-based radar in a data matrix, taking out data in one azimuth unit of each frame one by one, arranging the data together, using the data as target echo data to be processed, calculating distance moving amount of a target in all azimuth units based on space target parameter prior information, shifting the taken echo data to a distance unit according to the calculated distance moving amount, finally conducting phase compensation on the echo data shifted to one distance unit so as to perform fractional order Fourier transformation, using a result obtained through fractional order Fourier transformation to perform constant false-alarm detection processing so as to judge whether the target exists or not. By means of the multi-frame coherent TBD method, a maneuvering target can be effectively detected under the situation of low signal-to-noise ratio, and accordingly the effectiveness of the method is verified.
Owner:CIVIL AVIATION UNIV OF CHINA
High-speed maneuvering target parameter estimation method based on frequency domain polynomial phase transformation
InactiveCN104849708AWave based measurement systemsFast Fourier transformSignal-to-noise ratio (imaging)
The invention discloses a high-speed maneuvering target parameter estimation method based on frequency domain polynomial phase transformation. On the basis of data received by a space-based radar, pulse compression processing is carried out on high-speed maneuvering target echo data, fast Fourier transform is carried out along a quick time direction of the data after the pulse compression processing to obtain range frequency domain-slow time data, delaying is carried out on the range frequency domain-slow time data, conjugation of the range frequency domain-slow time data through delaying and the range frequency domain-slow time data without delaying are multiplied to realize frequency domain polynomial phase transformation, inverse fast Fourier transform is carried out along a range frequency domain direction of the data after frequency domain polynomial phase transformation processing, fast Fourier transform is carried out along the slow time direction on the basis to obtain range cell-Dopple data, and finally the range cell-Dopple data are used for target parameter estimation. In the condition of a low signal-to-noise ratio and a limited accumulated pulse number, a high-precision target parameter estimation result is acquired.
Owner:CIVIL AVIATION UNIV OF CHINA
Dual pulse-repetition frequency ambiguity solving method for space-based radars
InactiveCN110208786AAlleviate pairing issuesReduce deblurring ghost rateRadio wave reradiation/reflectionAmbiguityEngineering
The invention provides a dual pulse-repetition frequency ambiguity solving method for space-based radars. The method has the advantages that a speed ambiguity solving process is separated from a distance ambiguity solving process by introducing a dual carrier frequency design for each pulse-repetition frequency, the speed ambiguity is firstly solved by utilizing two different carrier frequencies of a same pulse-repetition frequency and the distance ambiguity is considered to be solved on an one-dimensional distance by utilizing a dual pulse-repetition frequency, so that on the one hand, the pairing problem and the ghost problem existing during the two-dimensional ambiguity solving of an overlap algorithm are alleviated, and on the other hand, the space filling time of the space-based radars is reduced by a large margin and the robustness of the target ambiguity solving is improved.
Owner:XIAN INSTITUE OF SPACE RADIO TECH
Space-based radar electromagnetic spectrum environment cognition system and anti-interference method
ActiveCN110618399AEasy accessAbility to counteract interferenceWave based measurement systemsFrequency spectrumRadar systems
The invention discloses a space-based radar electromagnetic spectrum environment cognition system and an anti-interference method. According to the method, the space-based radar electromagnetic spectrum environment cognition system is constructed on the basis of a space-based radar, fast beam scanning is performed on a task region continuously by multiple times through the space-based radar electromagnetic spectrum environment cognition system, signals outside a radar signal band range are intercepted from multiple collected signals for spectral analysis, the characteristics of pure interference signals are extracted, and band information of all the interference signals is acquired quickly; and information of the direction of arrival is estimated according to the change of each interference normalization power along with a beam scanning angle, electromagnetic spectrum environment perception prior information is obtained and fed back to the radar system in real time, and consequently the space-based radar system has an anti-interference ability and still maintains a target detection tracking ability even in a complicated electromagnetic environment. Through the method, the characteristics of the pure interference signals can be extracted rapidly, the direction of arrival of interference is estimated, interference information is fed back to the radar system in real time, and theanti-interference function of the system is achieved.
Owner:XIAN INSTITUE OF SPACE RADIO TECH
Reflecting surface folding and unfolding structure of foldable and deployable antenna of space-based radar
The invention provides a reflecting surface folding and unfolding structure of a foldable and deployable antenna of space-based radar, belongs to the technical field of the space-based radar and solves the problems of existing foldable and deployable antennas. The reflecting surface folding and unfolding structure comprises a reflecting surface, transverse ribs, bistable composite foldable and deployable cylindrical shells and auxiliary unfolding inflatable arms, wherein the reflecting surface is rectangular, the multiple transverse ribs arranged in the width direction of the reflecting surface are mounted on the surface of one side of the reflecting surface, are bonded with the reflecting surface and adopt a hollow tubular structure, the surface, bonded with the reflecting surface, of each transverse rib is a plane, and the surface, opposite to the surface bonded with the reflecting surface, of each transverse rib is an indent arc surface; at least two bistable composite foldable and deployable cylindrical shells are arranged between every two adjacent transverse ribs, and two ends of each bistable composite foldable and deployable cylindrical shell are contacted with the adjacent transverse ribs respectively; the two transverse ribs located on the outmost side of all the transverse ribs are connected through the at least two auxiliary unfolding inflatable arms. The reflecting surface folding and unfolding structure is applied to the space-based radar.
Owner:HARBIN INST OF TECH
System and method for locating targets using measurements from a space based radar
A system and method for determining a position of a target within an acceptable tolerance using an iterative approach. A airborne or space-based measuring device is used to measure an estimated position of the target. The information from the measuring device is used in conjunction with either live captured or stored topography, or the like, information relating to the surface of the planet proximate the target to iteratively determine the actual position of the target.
Owner:MITRE SPORTS INT LTD
Space-based radar efficiency optimization method
ActiveCN105137406AImplement multiple probesMeet the demand for high time resolution detectionWave based measurement systemsImage resolutionRadar
The invention provides a space-based radar efficiency optimization method. The method includes the following steps: determining an inclination angle of a track on the basis of a latitude zone of a target area and the loading distance of space-based radar; calculating the height of the track according to the loading distance of space-based radar and the inclination angle of the track; and arranging multiple space-based radar satellites on the same track surface by enabling the phase angles of the satellites to be equal or arranging the space-based radar satellites on N track surfaces. A zero-degree inclination angle of a non-zero-degree inclination angle of a track can be selected on the basis of a latitude zone of a target area and the loading distance of space-based radar, that is to say, a track with a low inclination angle can be selected. Therefore, the target area can be detected many times and the high system efficiency can be achieved by means of relatively less satellites, and a high temporal resolution detection requirement of an airplane target can be met.
Owner:SHANGHAI SATELLITE ENG INST
Multi-pulse-set optimization design method of space-based early warning radar
ActiveCN109581367AReliable detectionReduce transmit pulse occlusionRadio wave reradiation/reflectionRadarAmbiguity
The invention provides a multi-pulse-set optimization design method of a space-based early warning radar, and belongs to the technical field of radar early warning. Various factors including target doppler ambiguity, range clutter ambiguity, range blind areas, space filling time, target range ambiguity resolving and speed ambiguity resolving are fully considered, while reliable target detection isensured, the influence of transmission pulse shielding and sub-satellite point shielding is lowered to the maximum extent, and therefore range ambiguity clutters and range detection blind areas are reduced. Specifically, through the design criteria of the minimum multi-pulse, while reliable target detection is ensured, the influence of transmission pulse shielding and sub-satellite point shielding is lowered to the maximum extent, and therefore the range ambiguity clutters and the range detection blind areas are reduced. The relation between a multi-pulse set and the duty ratio and the protecting window length is restrained, no space and time filling is required during switching of different multi-pulses of the space-based radar, and working efficiency of the radar is greatly improved.
Owner:XIAN INSTITUE OF SPACE RADIO TECH
Large-length antenna-oriented containerized storage type on-orbit assembling device and method
ActiveCN112265656AUnified configuration designImprove connection strengthToolsMetal working apparatusRadarEngineering
The invention discloses a large-length antenna-oriented containerized storage type on-orbit assembling device and method. A one-way conveying mechanism, a two-way conveying mechanism and an assemblingassembly are fixedly mounted on a supporting frame; each space-based radar board unit is fixedly connected with a one-way conveying mechanism, the one-way conveying mechanisms drive the multiple space-based radar board units to move synchronously, and limiting structures matched with the space-based radar board units are arranged on the one-way conveying mechanisms to limit torsion and shaking ofthe space-based radar board units. The bidirectional conveying mechanism drives the space-based radar board units located at the bottom of the stacked structure to be coplanar with the last but one space-based radar board unit located at the bottom of the stacked structure, or drives the multiple space-based radar board units formed through splicing to move in the opposite direction of the splicing direction. The assembling assembly is used for splicing and fixing the space-based radar board unit located at the bottom of the laminated structure and the last but one space-based radar board unit located at the bottom of the laminated structure into an integral plane structure. The method has the characteristics of simple system composition, expandability, high realizability and the like.
Owner:BEIJING INST OF SPACECRAFT SYST ENG
Method for connecting space-based radar antenna reflection surface to bistable composite material deployable cylindrical shell
The invention provides a method for connecting a space-based radar antenna reflection surface to a bistable composite material deployable cylindrical shell, belonging to the technical field of space-based radars. The problems of an existing deployable antenna are solved. The method comprises a step of connecting the space-based radar antenna reflection surface to the bistable composite material deployable cylindrical shell by using an aramid rope and aramid cloth, multiple aramid cloth is arranged along the aramid rope and is arranged at two opposite sides of the aramid rope with intervals, the center line positions of the aramid cloth are aligned with the aramid rope, the aramid cloth and the aramid rope are in stitching joint and bonding connection, and the total number of the aramid cloth is odd, wherein aramid cloth in odd number positions is bonded to the reflection, the aramid cloth in even number positions is bonded to the bistable composite material deployable cylindrical shell, and at the same time, the aramid rope is arranged between the aramid cloth in odd number positions and the bistable composite material deployable cylindrical shell. The method is used for the space-based radar antenna reflection surface.
Owner:HARBIN INST OF TECH
Space-based radar clutter simulation method and device in consideration of terrain height
The invention discloses a space-based radar clutter simulation method and device in consideration of terrain height. Abnormal points are rejected through the space-based radar effect distance and earth elevation, and echo suitable for simulating the space-based radar equidistant clutter of any orbit is generated by adopting an iteration computation method. The method disclosed by the invention isin consideration of the influence of an earth sphere model and the earth autorotation, and can be used for the simulation of the space-based radar clutter, the simulation of the space-based radar two-dimensional clutter spectrum, and the evaluation of the space-based radar clutter inhibition method, and further can be used for the space-based radar orbit design.
Owner:XIAN INSTITUE OF SPACE RADIO TECH
Space-based radar space moving target detection and parameter estimation method and system
ActiveCN113267756AReduce the search dimensionImprove computational search efficiencyWave based measurement systemsSustainable transportationDistance correctionMatched filter bank
The invention provides a space-based radar space moving target detection and parameter estimation method and system. The method comprises the steps that S1, radar echoes are preprocessed to obtain baseband echo signals; s2, a corresponding phase compensation function is constructed based on echo characteristics of Doppler ambiguity and Doppler distortion signals so as to eliminate influences of Doppler ambiguity and Doppler spectrum distortion in baseband echo signals at the same time; s3, Keystone transformation is performed on the baseband echo signal subjected to Doppler ambiguity and Doppler distortion elimination to complete linear range walk correction; s4, after distance correction is completed, an acceleration matched filter bank is constructed to eliminate residual distance curvature and Doppler spread; and S5, after range walk and Doppler spread correction are completed, two-dimensional Fourier transform is utilized to complete a final coherent accumulation result. Compared with a traditional Keystone transformation matched filtering method, the provided correction Keystone transformation matched filtering method can achieve coherent integration of the high maneuvering target under the condition that the signal-to-noise ratio is not reduced.
Owner:SHANGHAI JIAO TONG UNIV
Smallsat Surveillance Constellation Using Mimo Radar
ActiveUS20200233080A1High resolutionLower launch costsCosmonautic vehiclesCosmonautic partsMulti inputEarth surface
A method is presented for the formation of a constellation of small satellites (smallsats) for radar surveillance employing multiple input, multiple output (MIMO) radar operation. Such a constellation can be used for cost-effective fine angular resolution and persistent remote sensing of targets or regions on, above, and below a planet's surface. Applications include, but are not limited to, surface mapping (including change detection), mapping of meteorological conditions, and detection of fleeting events. The method pertains to satellite configurations whose costs and aggregate masses are much less than those of conventional space-based radar measurements attempting to attain comparable angular resolution, while providing persistent surveillance.
Owner:WEISSMAN SCI & ENG CO LLC
Parameter Estimation Method of High Speed Maneuvering Target Based on Frequency Domain Polynomial Phase Transformation
InactiveCN104849708BWave based measurement systemsFast Fourier transformSignal-to-noise ratio (imaging)
The invention discloses a high-speed maneuvering target parameter estimation method based on frequency domain polynomial phase transformation. On the basis of data received by a space-based radar, pulse compression processing is carried out on high-speed maneuvering target echo data, fast Fourier transform is carried out along a quick time direction of the data after the pulse compression processing to obtain range frequency domain-slow time data, delaying is carried out on the range frequency domain-slow time data, conjugation of the range frequency domain-slow time data through delaying and the range frequency domain-slow time data without delaying are multiplied to realize frequency domain polynomial phase transformation, inverse fast Fourier transform is carried out along a range frequency domain direction of the data after frequency domain polynomial phase transformation processing, fast Fourier transform is carried out along the slow time direction on the basis to obtain range cell-Dopple data, and finally the range cell-Dopple data are used for target parameter estimation. In the condition of a low signal-to-noise ratio and a limited accumulated pulse number, a high-precision target parameter estimation result is acquired.
Owner:CIVIL AVIATION UNIV OF CHINA
Smallsat surveillance constellation using MIMO radar
ActiveUS10962639B2High resolutionLimited amountCosmonautic partsArtificial satellitesMulti inputEngineering
A method and system are presented for the formation of a constellation of small satellites (smallsats) for radar surveillance employing multiple input, multiple output (MIMO) radar operation. Such a constellation can be used for cost-effective fine angular resolution and persistent remote sensing of targets or regions above, below, or upon a planet's surface. Applications include, but are not limited to, surface mapping (including change detection), mapping of meteorological conditions, and monitoring of time-varying events. The method and system pertain to satellite configurations whose costs and aggregate masses are much less than those of traditional space-based radar measurements attempting to attain comparable angular resolution, while also providing intervals of persistent surveillance.
Owner:WEISSMAN SCI & ENG CO LLC
Performance Optimization Method for Space-Based Radar
ActiveCN105137406BImplement multiple probesMeet the demand for high time resolution detectionWave based measurement systemsRadarImage resolution
The invention provides a space-based radar efficiency optimization method. The method includes the following steps: determining an inclination angle of a track on the basis of a latitude zone of a target area and the loading distance of space-based radar; calculating the height of the track according to the loading distance of space-based radar and the inclination angle of the track; and arranging multiple space-based radar satellites on the same track surface by enabling the phase angles of the satellites to be equal or arranging the space-based radar satellites on N track surfaces. A zero-degree inclination angle of a non-zero-degree inclination angle of a track can be selected on the basis of a latitude zone of a target area and the loading distance of space-based radar, that is to say, a track with a low inclination angle can be selected. Therefore, the target area can be detected many times and the high system efficiency can be achieved by means of relatively less satellites, and a high temporal resolution detection requirement of an airplane target can be met.
Owner:SHANGHAI SATELLITE ENG INST
Space-based Radar Foldable and Expandable Antenna Reflector Folding Structure
ActiveCN106785311BWith foldable functionHigh storage ratioInflatable antennasMarine engineeringRadar
Owner:HARBIN INST OF TECH
Multi-frame coherent tbd method with improved envelope shift compensation and fractional Fourier transform
InactiveCN104597434BEfficient detectionAccumulation effect is goodRadio wave reradiation/reflectionSignal-to-noise ratio (imaging)Prior information
Owner:CIVIL AVIATION UNIV OF CHINA
Multi-satellite ultra-close-flying space-based radar system
ActiveCN107678018BGuaranteed distanceGuaranteed flatnessRadio wave reradiation/reflectionRadar systemsEqualization
The invention discloses a space-based radar system for multi-satellite ultra-short-distance follow-up flight. , large data volume transmission system; the satellite body is composed of satellite structure, attitude control, thermal control, power supply, and other sub-systems, which provide guarantee conditions for the work of the radar antenna. In the present invention, by launching a plurality of small-area radar antenna satellites, an ultra-short-distance follow-up flight is formed on orbit to ensure the distance and flatness between the antennas.
Owner:SHANGHAI SATELLITE ENG INST
Multi-satellite ultra-short-range flight-following space-borne radar system
ActiveCN107678018AGuaranteed distanceGuaranteed flatnessRadio wave reradiation/reflectionNatural satelliteRadar systems
The invention discloses a multi-satellite ultra-short-range flight-following space-borne radar system composed of satellite bodies, a space-borne radar antenna, a high-precision inter-satellite measurement system, an ultra-short-distance flight-following control system, a high-precision planeness measurement system and a big data volume transmission system. Each satellite body is composed of a satellite structure, an attitude control unit, a heat control unit, a power source and a halving system and provides supporting conditions for operation of the radar antenna. According to the invention,through launching multiple small-area radar antenna satellites, ultra-short-range flight following is achieved on track, so that distance and planeness among the antennas are ensured.
Owner:SHANGHAI SATELLITE ENG INST
Real-time ground clutter suppression method for space-based external radiation source radar
ActiveCN105182300BAdapt to real-time processing needsReduce complexityWave based measurement systemsRadar systemsMathematical model
The invention relates to a ground clutter interference real-time suppression method for a space-based external radiation source radar. The ground clutter interference real-time suppression method comprises the steps of: completing key parameter design of a space-based external radiation source radar system according to transmitting and receiving time sequence requirements for system RF signals; analyzing spatial position and moving relation between a space-based radar platform and an external radiation source, and establishing a space-based external radiation source radar ground clutter mathematical model; constructing a reference signal by utilizing a direct wave signal, carrying out cross-correlation processing on the reference signal and a target signal received by a two-channel echo antenna; eliminating ground clutter interference of correlation result of an nth frame signal of a channel 1 and correlation result of an (n-1)th frame signal of a channel 2 by adopting a two-pulse canceller; and repeating the cross-correlation processing and the two-pulse cancelling steps for carrying out Fourier transform on N frame signals after clutter suppression along a speed dimension to achieve phase-coherent accumulation, and adopting a constant false-alarm criterion to realize target detection. The ground clutter interference real-time suppression method can be used for suppressing clutter interference effectively, reduces complexity of the algorithm, and is convenient to achieve real-time data processing of the space-based platform.
Owner:SHANGHAI RADIO EQUIP RES INST
A Space-Based Radar Range/Velocity Defuzzification Method Based on Fuzzy Matrix Update
ActiveCN111289953BAvoid the problem of fractional order errorSolve the problem of ghostingRadio wave reradiation/reflectionUltra high speedDefuzzification
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY +1
A simulation method of space-based radar clutter
The invention provides a space-based radar clutter simulation method. The method considers influence of an earth sphere model and earth rotation, through projection and coordinate transformation, the longitude and latitude of equidistant clutter rings on the earth surface can be obtained, clutter Doppler is obtained through coordinate system transformation, and then the reflection power of a clutter unit is calculated, thereby obtaining clutter echoes of equidistant rings. The method can be applied to simulating echoes of space-based radar equidistant clutter rings of any track, and can calculate the positions of the equidistant clutter rings, thereby laying a foundation for determining the clutter type. The method can also be used for space-based radar clutter two-dimensional spectrum analysis, space-based radar clutter suppression method assessment, analysis of influence of a space-based radar track on system performance and the like.
Owner:XIAN INSTITUE OF SPACE RADIO TECH
Space-based radar distance/speed ambiguity resolution method based on ambiguity matrix updating
ActiveCN111289953AAvoid the problem of fractional order errorSolve the problem of ghostingRadio wave reradiation/reflectionUltra high speedAlgorithm
The invention discloses a space-based radar distance / speed ambiguity resolution method based on ambiguity matrix updating, which belongs to the technical field of radars. According to the method, a fuzzy matrix is adopted to replace a traditional distance-speed two-dimensional separation ambiguity resolution criterion, the problem of fractional order errors can be avoided in the modes of matrix expansion, element sorting, amplitude variance sorting and element updating, and meanwhile the problem of virtual images caused by multi-target pairing errors and noise pairing can be solved. Under multiple PRF observations, the space-based radar target detection multi-target distance-speed ambiguity resolution is realized, and the occurrence of virtual images can be inhibited. The method has the advantages of being high in operation speed, good in real-time performance and high in anti-noise capacity, can cope with the situation of multi-target or missile defense penetration, and has good engineering application value. The method is especially suitable for ultra-high-speed target detection multi-target distance-speed ambiguity resolution.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY +1
A space-based radar electromagnetic spectrum environment cognition system and interference countermeasure method
ActiveCN110618399BEasy accessAbility to counteract interferenceWave based measurement systemsRadar systemsFrequency spectrum
Owner:XIAN INSTITUE OF SPACE RADIO TECH
Features
- R&D
- Intellectual Property
- Life Sciences
- Materials
- Tech Scout
Why Patsnap Eureka
- Unparalleled Data Quality
- Higher Quality Content
- 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com