39 results about "Radar countermeasures" patented technology

The invention provides a radar countermeasure equipment effectiveness evaluation method based on hardware-in-the-loop simulation. Electromagnetic environment simulation in a lab and a hardware-in-the-loop environment simulated by a countermeasure object are used, a corresponding countermeasure scene is set according to application conditions and performance requirements of different pieces of countermeasure equipment, and a real-time and radio frequency-level hardware-in-the-loop simulation experiment is developed; according to recorded information, a multi-dimension effectiveness representation model is used, and a countermeasure effectiveness evaluation result is obtained. The method of the invention is applied to the performance detection and evaluation design step in the current radar electron countermeasure equipment development, the electron reconnaissance ability and the electron interference ability of the electron countermeasure equipment in different complexity signal environments can be detected under the lab condition, and promotion roles can be played in research on electromagnetic signal environment adaptability of the electron countermeasure equipment, electron interference effectiveness in view of different radar threat objects, and research on the countermeasure technology.

The invention discloses a convolutional neural network based cooperative radar network track deception jamming discrimination method, and belongs to the technical field of radar countermeasure. Track deception jamming is a new mode of deception jamming special for networking radar, and has the characteristics of strong confusability and high discrimination difficulty; in practical engineering, signals and data information reported by radar stations are quite rich, and the existing method using single data layer characteristics for hard decision has the disadvantages of poor reliability in discrimination results and high false discrimination probability. In order to solve the problem, the method mainly includes the following steps: (1) calculating an identification characteristics parameter set; (2) selecting training and testing samples; (3) utilizing the training sample to train the network, and utilizing the testing sample to test the network. The method is applicable to centralized radar networks and high in correct identification rate of false tracks, and has high engineering application value and popularization prospect.

The invention discloses a radar anti-jamming efficiency assessment credibility measurement realization method. For a relationship between mode classification and efficiency assessment, the efficiency assessment is regarded as efficiency grade classification, and from classification credibility, the assessment credibility is researched. An uncertainty theory is introduced in the method to realize uncertainty processing of test data. A credibility measurement method for an assessment model is obtained through calculation according to performance assessment indexes of the classification model. Multiple single-sample classification credibility calculation methods are fused to obtain a widely used single-sample assessment credibility calculation method, and further through a credibility propagation model, a comprehensive efficiency assessment credibility measurement result is obtained. According to the method, the radar countermeasure efficiency assessment credibility comprehensive analysis can be processed, and a complete analysis process and a corresponding calculation formula are given; and the assessment result analysis demands can be met in most weapon system efficiency assessment.

A modern radar generally uses a low probability intercept (LPI) radar signal to detect a target so that LPI signal classification is needed in radar countermeasures. Currently, a traditional artificial characteristic extraction algorithm is used to classify, and during practical application, the classification correct rate of the algorithm is not ideal. The invention provides a classification method based on the combination of a quadrature mirror filter group and a convolutional neural network. The method comprises the following steps of firstly, carrying out QMFB processing on an interceptedradar signal to obtain radar layered time frequency images; then, based on the novel convolutional neural network, classifying the radar layered time frequency images; and finally, outputting a LPI radar signal classification result. In the invention, based on the convolutional neural network, a plurality of LPI signal characteristics can be automatically extracted, and compared with the traditional algorithm, the method of the invention has improved classification efficiency and an improved identification correct rate.

The invention provides an associated display method for full-pulse signal multidimensional parameters. Color dimension and color piece width information are introduced on the basis of the full-pulse data time domain two-dimension display capable of only displaying two associated parameters, so that the function of conducting associated display on four parameters of the pulse arrival time, the frequency, the pulse width and the pulse amplitude of full-pulse signals in a two-dimensional graphical plane at the same time is achieved. The method can be directly used for development of a full-pulse visual analysis software tool of radar countermeasure equipment and can be used in cooperation with the existing full-pulse data time domain two-dimension display, and full-view comprehensive display and visual association analysis can be conducted on multi-dimensional associated parameters of the full-pulse signals in the time period to which a user pays attention.

The invention discloses a small-sized high-speed large dynamic digital receiver system and method. The receiver system comprises a digital analog conversion part and a signal extraction part; the digital analog conversion part adopts an ADC (analog to digital converter) chip; the output of the ADC chip is connected with an FPGA (field programmable gate array) chip logic functional module; the signal extraction part adopts an FPGA chip; the FPGA chip comprises and is sequentially provided with a data conversion module, two levels of FIFO (first in first out) modules, an FFT (fast Fourier transform) module and a super resolution compensation module; a gigabit Ethernet is connected to perform signal outputting after signal extraction. The realizing method of the small-sizes high-speed large dynamic digital receiver system comprises the steps of performing digital analog conversion on a radar simulation signal by the ADC chip, realizing the large dynamic wideband receiving and super resolution compensation processing by the FPGA chip, detecting and sorting the signals in the frequency band, and extracting one or more target signals. The small-sizes high-speed large dynamic digital receiver system is simple in structure, small in size, low in power consumption and strong in hardware reliability, can achieve 10bit sampling bit wide and 4GHz sampling rate, can be used for extracting one or more signals at the same time, and can be applied to multiple fields of radar countermeasure, remote sensing and the like.

The invention discloses a broadband radar target echo signal simulation system, which comprises a main control computer, a signal processor and a radio frequency machine. The main control computer isused for realizing system self-inspection, hardware state monitoring and test related parameter and command setting, and completing test initialization; the whole system is driven to operate, manage and monitor, and the system is controlled to safely, reliably and stably operate in various modes to finish preset test contents; the signal processor is mainly used for real-time generation, samplingand signal processing of intermediate frequency broadband signals. The radio frequency machine comprises an up-conversion module, a signal synthesis module and a down-conversion module. The inventionalso discloses a broadband radar target echo signal simulation method. According to the invention, real-time simulation of a broadband radar system on a universal computing platform can be realized, the open reconfigurable capability and high-speed data exchange capability of the system are greatly improved, a broadband radar countermeasure injection type simulation test can be carried out, and aresearch platform is provided for test and training of an electronic information system.

The invention provides a game-oriented radar countermeasure strategy generation method, which comprises the following steps: setting a countermeasure scene: setting a radar and an interference systemas two players, constructing a radar countermeasure game tree, setting two neural networks of a regret value and a countermeasure strategy and a corresponding cache region for each player, and initializing neural network parameters; traversing the K game trees within the iteration times, alternately training the radar and the interference party, training the regret value neural network by using the regret value cache region data, and then training the adversarial strategy neural network of the radar and the interference party by using the collected adversarial strategy cache region data untilthe adversarial strategy neural network converges. Compared with radar countermeasure static game research, the method has the advantages that a dynamic game model of incomplete information is constructed, Nash equilibrium of radar and interference system games is approximately solved by using a neural network under the condition that both parties are intelligent, and respective Nash equilibrium strategies are obtained through multiple times of dynamic iterative updating.

The invention relates to the technical field of radar countermeasure, and discloses a data processing method of radar countermeasure equipment test decision evaluation based on a rule engine. Throughadoption of flow chart graphical modeling of radar countermeasure equipment test data processing, a flow modeling method of directed graph element representation, XML definition and modular modeling,as well as the processes of flow analysis, process decomposition, graphical modeling and parameter configuration, custom design of a logical structure of the data processing flow of radar countermeasure equipment test is realized, that is, a radar countermeasure equipment test decision evaluation system is developed by the decomposition of the test data processing flow, structured modeling of thedata processing rule, resolution and execution of the data processing rule based on the rule engine, and analysis of a test evaluation result based on a process data class. The resolution and execution of the data processing rule for radar countermeasure equipment test are realized. The method can quickly judge the action of countermeasure and quickly evaluate the test result, and is of great practical significance for improving the test efficiency and test capability.

The invention discloses an onboard self-defense deception type interference method based on a multi-synthesis technology, and relates to the technical field of electronic warfare radar countermeasure.The method comprises the following steps that: S1: when an enemy single-pulse radar emits a detection signal, an own side onboard interference system receives the detection signal to obtain enemy seeker radar information; S2: an own side onboard electronic warfare system analyzes the enemy seeker radar information, and the enemy seeker radar information is combined with false target information to be synthesized into pre-programming information, and the pre-programming information is used for generating a multi-antenna feeding scheme; and S3: an own side onboard multi-antenna system calls a multi-antenna feeding scheme to emit an interference signal to synthesize a false target, and therefore, the enemy single-pulse radar can not discriminate the true target of the own side. By use of themethod, field distortion formed during multi-antenna radiation field synthesis is used for interfering the judgment of the radar for a field normal line, so that a wider interference range, a higherdegree of freedom and a bigger interference angle are generated, and an interference effect with better fraudulence is obtained.

The invention discloses a long-baseline radar net false track identification algorithm based on three-threshold delay determination, wherein the algorithm belongs to the field of radar countermeasure technology. A false track interference is a novel interference form and has high discriminating difficulty. The long-baseline radar net false track identification algorithm aims to settle the problems and mainly comprises the following steps of (1), converting measurement of each radar to an ECEF coordinate system, and realizing spatial alignment; (2), estimating a target state by means of Kalman filtering and calculating three polar coordinates of a relative radar; (3), constructing a sample and calculating an examination statistics amount gaba; (4), selecting a significance level and establishing a counter with an initial value of zero; (5), if gaban<=G0.5<n>, determining the track as a true track, if gaban>=G0.01<n>, determining the track as a false track, if G0.1<n><gaban<G0.01<n> and n is smaller than 7, adding one to the read number of the counter, and repeating the steps (2)-(5); and (6), if n=7 and the read number of the counter, determining the track as a false track, and otherwise, determining the track as the true track. The long-baseline radar net false track identification algorithm is suitable for identification of the false track by a long-baseline radar net and furthermore has relatively high engineering application value and good popularization prospect.

The invention relates to an accumulated non-contact broadband high-power rotating hinge and an achievement method thereof and belongs to the technical field of radar countermeasure antennas and microwaves. The accumulated non-contact broadband high-power rotating hinge and the achievement method are mainly used for solving the problem of broadband high-power input signal stimulus and output signal coupling of an accumulated multi-channel non-contact rotating hinge. According to the accumulated non-contact broadband high-power rotating hinge, short sections of radial lines are arranged at an input end and an output end of the accumulated non-contact broadband high-power rotating hinge respectively to support voltage probes to achieve input signal stimulus and output signal coupling; multi-stage impedance gradient matching sections are arranged in front of an input voltage probe and an output voltage probe respectively; gaps are formed between the input and output voltage probe and a coaxial line outer conductor; the multi-stage impedance gradient matching sections are connected with the coaxial line outer conductor; a radial choking device is arranged between a rotating portion and a relatively stationary portion of the coaxial line outer conductor; and a coaxial line inner conductor is utilized as an integral structure to penetrate multi-channel input signal cables of the accumulated non-contact broadband high-power rotating hinge.

The invention relates to a multi-radar countermeasure method and system. The method comprises the steps of carrying out the frequency division of a received radar radio frequency signal, obtaining a frequency division intermediate frequency signal after the frequency division of the received radar radio frequency signal and a frequency division local oscillator signal, carrying out the frequency detection of the pulse front edge of the frequency division intermediate frequency signal, and obtaining a pulse starting frequency; performing broadband and narrowband judgment on the frequency division intermediate frequency signal of the radar signal to obtain a broadband and narrowband judgment result of the broadband signal or the narrowband signal; calculating the center frequency of the broadband signal for the broadband signal according to the broadband and narrowband judgment result; determining a local oscillation signal frequency range of the narrow-band signal according to the pulsestarting frequency and switching to the corresponding local oscillation signal according to the broadband and narrowband judgment result; for the broadband signal, determining the frequency range ofa local oscillation signal according to the center frequency of the broadband signal and switching to the corresponding local oscillation signal; and mixing the local oscillator signal and the radar radio frequency signal to generate an intermediate frequency radar signal, and generating a radar interference signal according to the intermediate frequency radar signal.

The invention provides a radar equipment and radar countermeasure equipment synchronous training system, and a practice method thereof, and belongs to the field of radar and radar countermeasure training. The synchronous training system in the invention comprises radar equipment, radar countermeasure equipment, a moving target, a moving track and a fixed bracket. According to optical property design of an ellipse, due to detection and interference of the radar equipment and the radar countermeasure equipment on the same target, data is observed and recorded in real time; therefore, the combatefficiency of the equipment is evaluated; and furthermore, the training practicality and the raining effect are improved. According to the radar equipment and radar countermeasure equipment synchronous training system, and the practice method thereof in the invention, the problems that an electromagnetic environment is not complex enough, the training mode is single, an actual combat video screenis low and the like can be solved; due to synchronous training of the radar equipment and the radar countermeasure equipment, the radar equipment and radar countermeasure equipment training effect isimproved; the combat efficiency evaluation accuracy of the equipment is improved; and the system in the invention has the characteristics of being flexible in target arrangement, steady and reliable in performance, convenient to operate and use, easy to maintain.

The invention discloses an L waveband non-contact small axial size rotating hinge and a realization method for the same. The L wave band non-contact small axial size rotating hinge and the realization method solve problems that the bandwidth of an L waveband non-contact type rotating hinge is narrow and a big axial size is not convenient for design of a multi-channel rotating hinge inlay structure and is applied to mechanical scanning system radar countermeasures. About the L waveband non-contact small axial size rotating hinge, a transmission ring coaxial outer conductor and an annular flat wide coupling line constitutes a coupling transmission ring; a signal on a coaxial input port is divided into two signals which are transmitted to the coupling transmission ring and the two signals are combines into one signal which is outputted from a coaxial output port; the coaxial input port and the coaxial output port are connected to the coupling transmission ring in parallel; transmission ring coaxial inner conductors are annular flat coupling lines, between which a certain space is arranged; and two-stage matching sections and a polytetrafluoroethylene medium block constitute a short circuit adjustment device. The L wave band non-contact small axial direction size rotating hinge and a realization method for the same increase the bandwidth of the rotating hinge, reduce the axial size and provide convenience to multichannel rotating hinge inlay structure design, and is easy in part processing and reliable in processing.

The invention relates to the field of radar countermeasure device performance evaluation and measurement and particularly relates to a radar analog echo and interference signal measuring device. The application requirement of a radar countermeasure device performance evaluation test that a completely coherent radar analog echo signal can be generated in a low-cost manner, the amplitude and delay of the echo signal can be adjusted, different distances and target echoes with different sizes can be simulated, an interference signal and an echo signal can be mixed, dechirp processing is carried out to generate an intermediate frequency signal, the intermediate frequency signal is sampled and stored at a high speed, and a radar signal processing terminal is used for performing data analysis ismet, and the problem that a large number of test devices suitable for product debugging and used by testers are configured on a production line in the development and production process of the radar countermeasure device is solved.

The invention discloses a radar countermeasure detection guarantee skill training device which comprises a main control case and a radar signal generating case. A microwave front end module inside theradar signal generating case receives radar radio frequency signals, radar radio frequency signals received by the radar signal generating case are transmitted to a radar countermeasure detection receiver in a classified mode, a signal processing module is electrically connected with a servo control module and a transceiving control module, the servo control module and the transceiving control module are both in wired connection with a main control module, the main control module is in signal connection with a radar countermeasure control management system. Radar countermeasure detection guarantee skill training can be completed, the training cost is lowered, the training time is increased, and the training effect is improved; the microwave front end module is used for performing filtering, amplitude limiting and low-noise amplification on the radar radio frequency signals, needed radar signals can be conveniently diagnosed and recognized, faults of training equipment can be rapidly found, the training time is ensured, and the training efficiency is improved.

The invention relates to a multi-functional radar signal prediction mode based on a predictive state representation model. The method comprises the steps of (1) establishing a PSR model of MFR, (2) carrying out PSR model training, (3) carrying out MFR working mode posterior probability distribution estimation, and (4) carrying out MFR signal single-step and multi-step prediction. The method has the advantages that: (1) an MFR working identification and prediction problem is researched, the characterization ability of a dynamic system is stronger by using the PSR model, and the model is simple, (2) through extracting statistical amount information of training samples, landmarks and core events are used, and the dependence on MFR prior information is greatly reduced, and (3) the method has a strong application prospect, an MFR signal sequence can be accurately predicted, thus the dynamic analysis of the MFR working mode and scheduling strategy becomes possible, and a technical support is provided for the realization of adaptive radar countermeasure.

The invention discloses an active anti-interference method based on a frequency control array phase center. The method is specifically implemented according to the following steps of step 1, constructing a frequency control array radar system; step 2, deriving a phase center of the FDA radiation signal; step 3, controlling the phase center deviation by adjusting the frequency increment; and step 4, searching for the optimal frequency offset through an immune particle swarm optimization algorithm to maximize the phase center deviation. According to the method, the phase center deviation is maximum, the parameters are controllable, angle deception of an enemy jammer is achieved while the detection precision of the method is improved, and therefore active anti-interference based on the frequency control array phase center is achieved, a new thought is provided for radar countermeasure in electronic warfare, and compared with a traditional passive anti-interference method, the method has the advantages that positive defense of dominant confrontation is achieved, parameters are controllable, and the situation that interference changes and is limited to coping with is avoided.

The invention discloses a radar jamming method based on a multivariate vector synthesis technology, which relates to the technical field of electronic warfare radar countermeasures. The method comprises the following steps: 1, when an enemy radar transmits electromagnetic waves, the own electronic warfare system reconnoiters enemy radar radiation parameter information and seeker parameter information; 2, the acquired enemy radar radiation parameter information and the seeker parameter information are transmitted to the own warfare device loaded with a multivariate vector synthesis system, andthe multivariate vector synthesis system generates a set of preprogrammed programs to be transmitted to a multivariate vector control system; and 3, according to the preprogrammed programs transmittedby the multivariate vector synthesis system, the multivariate vector control system in the own warfare device opens jamming, and thus, the enemy radar can not distinguish the real target of the otherside. The problems that the existing radar jamming method is poor in jamming effects and small in application range can be solved.

The invention relates to an accumulated non-contact broadband high-power rotating hinge and an achievement method thereof and belongs to the technical field of radar countermeasure antennas and microwaves. The accumulated non-contact broadband high-power rotating hinge and the achievement method are mainly used for solving the problem of broadband high-power input signal stimulus and output signal coupling of an accumulated multi-channel non-contact rotating hinge. According to the accumulated non-contact broadband high-power rotating hinge, short sections of radial lines are arranged at an input end and an output end of the accumulated non-contact broadband high-power rotating hinge respectively to support voltage probes to achieve input signal stimulus and output signal coupling; multi-stage impedance gradient matching sections are arranged in front of an input voltage probe and an output voltage probe respectively; gaps are formed between the input and output voltage probe and a coaxial line outer conductor; the multi-stage impedance gradient matching sections are connected with the coaxial line outer conductor; a radial choking device is arranged between a rotating portion and a relatively stationary portion of the coaxial line outer conductor; and a coaxial line inner conductor is utilized as an integral structure to penetrate multi-channel input signal cables of the accumulated non-contact broadband high-power rotating hinge.

The invention discloses a dynamic knowledge base design method and device for intelligent radar confrontation. The method comprises the following steps: constructing an intelligent radar confrontation dynamic knowledge base and a form thereof; comprising a sample library, a target library, a model library, a sample library form, a target library form and a model library form; the existing radar data samples and radar knowledge are stored in a form of a knowledge base. Inputting an instruction, and extracting radar knowledge from the target library form; updating the sample library by using radar knowledge; extracting a radar data sample from the sample library, and extracting a radar algorithm model from the model library; processing the radar data sample by using the radar algorithm model, and extracting radar knowledge; and storing the radar knowledge in the target library, and updating the target library. According to the method, radar sample data, radar system knowledge and various algorithm models can be flexibly and effectively organized, radar signals are gradually analyzed and knowledge is extracted according to a signal processing flow, and the obtained knowledge has universality and authority.

The invention provides a radar countermeasure equipment effectiveness evaluation method based on hardware-in-the-loop simulation. Electromagnetic environment simulation in a lab and a hardware-in-the-loop environment simulated by a countermeasure object are used, a corresponding countermeasure scene is set according to application conditions and performance requirements of different pieces of countermeasure equipment, and a real-time and radio frequency-level hardware-in-the-loop simulation experiment is developed; according to recorded information, a multi-dimension effectiveness representation model is used, and a countermeasure effectiveness evaluation result is obtained. The method of the invention is applied to the performance detection and evaluation design step in the current radar electron countermeasure equipment development, the electron reconnaissance ability and the electron interference ability of the electron countermeasure equipment in different complexity signal environments can be detected under the lab condition, and promotion roles can be played in research on electromagnetic signal environment adaptability of the electron countermeasure equipment, electron interference effectiveness in view of different radar threat objects, and research on the countermeasure technology.

The present invention relates to the field of informatization, and in particular to a radar countermeasure device information collecting terminal, comprising: an embedded computer, wherein the embedded computer is connected to a peripheral control unit for controlling an external device, the peripheral control unit includes a networking communication device control module for controlling a networking communication device of remote data communication between the device and a command post, a positioning timing device control module for controlling a positioning timing device for performing high-precision time synchronization and device tracking positioning, and an environmental monitoring device control module for controlling an environmental monitoring device for monitoring internal environmental conditions of the device. The collection terminal can effectively overcome defects of the prior art that real-time and effective acquisition of work conditions and information interaction of the radar countermeasure device in practical work can not be realized.

The invention discloses a convolutional neural network based cooperative radar network track deception jamming discrimination method, and belongs to the technical field of radar countermeasure. Track deception jamming is a new mode of deception jamming special for networking radar, and has the characteristics of strong confusability and high discrimination difficulty; in practical engineering, signals and data information reported by radar stations are quite rich, and the existing method using single data layer characteristics for hard decision has the disadvantages of poor reliability in discrimination results and high false discrimination probability. In order to solve the problem, the method mainly includes the following steps: (1) calculating an identification characteristics parameter set; (2) selecting training and testing samples; (3) utilizing the training sample to train the network, and utilizing the testing sample to test the network. The method is applicable to centralized radar networks and high in correct identification rate of false tracks, and has high engineering application value and popularization prospect.

The invention relates to a multi-radar countermeasure method and system. The method comprises the steps of carrying out the frequency division of a received radar radio frequency signal, obtaining a frequency division intermediate frequency signal after the frequency division of the received radar radio frequency signal and a frequency division local oscillator signal, carrying out the frequency detection of the pulse front edge of the frequency division intermediate frequency signal, and obtaining a pulse starting frequency; performing broadband and narrowband judgment on the frequency division intermediate frequency signal of the radar signal to obtain a broadband and narrowband judgment result of the broadband signal or the narrowband signal; calculating the center frequency of the broadband signal for the broadband signal according to the broadband and narrowband judgment result; determining a local oscillation signal frequency range of the narrow-band signal according to the pulsestarting frequency and switching to the corresponding local oscillation signal according to the broadband and narrowband judgment result; for the broadband signal, determining the frequency range ofa local oscillation signal according to the center frequency of the broadband signal and switching to the corresponding local oscillation signal; and mixing the local oscillator signal and the radar radio frequency signal to generate an intermediate frequency radar signal, and generating a radar interference signal according to the intermediate frequency radar signal.

The invention discloses an antenna servo control and angle tracking guarantee skill training device for radar countermeasure equipment, and belongs to the technical field of training devices. The device comprises a direction finding antenna, an antenna rotating table, a control cabinet, a servo control panel and a software system for realizing control, wherein the direction finding antenna is connected with the antenna rotating table, and the control cabinet is connected with the servo control panel; the antenna rotating table comprises a direction finding receiver; the control cabinet comprises a collector ring, an intermediate-frequency excitation power supply, a synchronous machine, a mechanical transmission assembly, a motor drive, a PWM generation circuit, a servo control unit, a system control computer and an angle display; the software system comprises servo direction finding tracking main control software, direction finding processor embedded software and servo controller embedded software. Antenna servo control and angle tracking guarantee skill training for the radar countermeasure equipment can be completed on the open device, which reduces the training cost, prolongs the training time and adapts to equipment in service.

The invention discloses a column diagram generation method for tactical calculation in electronic warfare. The column diagram generation method comprises the steps: S1, converting a known formula intok + f1 (u) + f2 (v) = f3 (w); s2, obtaining the value ranges of the initial parameters u, v, k and f3 (w) and the width H and height L of the column diagram; using a column diagram method to carry out radar countermeasure tactical calculation in an on-map operation mode; completing corresponding tactical calculation. The time of operators from model understanding to model application for solvingthe actual military problem is shortened, the threshold for combat effectiveness calculation is lowered, manual rapid calculation can be conducted, the speed of combat effectiveness calculation is increased, and support is provided for fine calculation to assist military decision making.