56 results about "Electronic warfare" patented technology

A system and method are described for emitter identification and tracking in an electronic warfare (EW) environment. The system includes an antenna array configured to receive signals from radio frequency (RF) emitters during a dwell. Processing circuitry converts the received signals into digital signals. Pulses are detected and characteristics of the pulses determined to form pulse descriptor words (PDWs). The PDWs obtained during the dwell are deinterleaved using unsupervised machine learning to form clusters. The clusters are categorized using one or more supervised machine learning algorithms to determine whether the PDWs correspond to known or unknown emitters and the results tracked as in or out of library emitters. After merging the in or out of library emitters, an emitter report is generated and used to update a library of emitter profiles used by the supervised machine learning algorithms as well as determine countermeasures to generate.

The invention provides an arrival wave angle estimation method based on a zero scanning leaky-wave antenna. A rectangular waveguide is selected as a basic structure to design a periodic leaky-wave antenna only working in a-1 harmonic state; designing necessary antenna simulation parameters; a first leaky-wave antenna is designed; adjusting the gap interval p, and designing a second leaky-wave antenna; obtaining pattern functions of the first leaky-wave antenna and the second leaky-wave antenna; proper amplitude and phase parameters are selected for directional diagram synthesis, and a new directional diagram function is obtained; constructing an array guiding matrix suitable for the MUSIC algorithm; signal sources are arranged at different positions, simulation testing is carried out through MATLAB, and the incoming wave angle estimation capability of the zero-point scanning leaky-wave antenna is verified. According to the invention, a feasible technical path is provided for high-precision positioning and tracking application in future 6G mobile communication. The antenna is especially suitable for application in millimeter wave and terahertz frequency bands, such as vehicle-mounted communication, unmanned aerial vehicle platforms, military electronic countermeasures and the like.

The invention belongs to the technical field of radar test and simulation, and particularly discloses a multimode mixed injection type semi-physical radar target simulation evaluation system and method, which comprises a radar / electronic warfare beam synchronization unit, an injection type radar target simulation evaluation system and a simulation control unit. The system obtains radar real-time beam scanning information through a beam synchronization unit, carries out real-time fusion on the radar real-time beam scanning information and avionics control data from an avionics system test bench, drives an injection type system to generate a simulation radio frequency target containing a sum signal, an azimuth difference signal and a pitch difference signal, and provides the simulation radio frequency target to a radar to be tested in an injection mode. And the simulation control unit is responsible for man-machine interaction, controlling a test process and performing automatic comprehensive evaluation on a simulation result. According to the method, automatic evaluation of dynamic closed-loop simulation, multi-mode seamless switching and high-order tactical indexes can be realized, and the method is suitable for high-fidelity performance verification of a modern radar system.

The invention provides a collaborative array position planning method for remote support interference of an electronic warfare aircraft, and belongs to the technical field of shipboard aircraft combat operation. The method comprises the following steps: firstly, in a long-distance support interference scene, determining an interference coverage range of an electronic jammer from two aspects of pitching and orientation; and secondly, calculating the interference effect of the electronic jammer based on the interference unified equation. Thirdly, based on the interference coverage range, designing constraint conditions and a target function, and establishing an electronic jammer collaborative array planning problem model; and finally, based on the electronic jammer collaborative array planning problem model, a genetic algorithm is utilized to solve an electronic jammer optimal array planning scheme of long-distance support interference. The method is suitable for a collaborative array planning problem of electronic warfare aircraft remote support interference, interferes the enemy radar when the jammer formation executes a remote support interference task, reduces the detection threat of the enemy radar to the strike formation, and guarantees the smooth execution of our strike task.

A system and method are described for updating Machine Learning (ML) models in an electronic warfare (EW) environment. The ML models are updated automatically post mission using threat data of emitters in the EW environment and then deployed to hardware in an aircraft. The updated ML models are used during a subsequent mission and include an unsupervised ML model to deinterleave waveforms received from the emitters and a supervised ML model for emitter identification, waveform tracking, and anomaly detection based on the deinterleaved waveforms. The ML models are updated by augmenting templates that indicate the behavior of the emitters and training the ML models using many plausible superpositions of the augmented templates. The ML models are updated by selecting and applying non-linear augmentations of at least one of the templates and new templates randomly using a Monte Carlo approach.

A system and method are described for emitter identification, emission tracking, and anomaly detection in an electronic warfare (EW) environment. Association results are obtained of waveforms of the emitters in a current dwell. The association results include a current distribution of inferred groupings of the waveforms. Features are generated for each waveform by comparing the current distribution and recent emitter historical behavior contained in a Dynamic Emitter Library (DEL). A probability of association with a track is determined for each waveform based on the features generated through the comparison. An identity of an emitter based on the probability and anomalous behavior of the emitter are inferred for each waveform.

The application discloses a time difference positioning method based on random robust least square, mainly solves the threshold effect of the existing time difference positioning method when the measurement error increases, and leads to the problem of sharp deterioration of positioning accuracy, and the implementation scheme is as follows: a plurality of observation stations and noise measurement errors are set, the time difference positioning equation is obtained by using the position parameters and the measurement errors, an auxiliary variable is defined, the auxiliary variable is introduced into the time difference positioning equation to establish a constraint equation, the constraint equation is processed by using a random robust least square method to obtain a cost function, the cost function is solved by using a least square method to obtain a target position, a new constraint equation is established according to the internal relation of the auxiliary variable elements, the new constraint equation is solved by using a weighted least square method to obtain a positioning error, the target position is linearly corrected by using the positioning error to obtain a final positioning result, and the target positioning is completed. The application reduces the positioning error, improves the positioning accuracy and the robustness of positioning, and can be used in aerospace, navigation and electronic warfare.

The invention relates to the technical field of radar electronic countermeasures, in particular to an equipment intelligent decision-making method based on threat level classification. Comprising the following steps: constructing an electronic warfare decision state space containing own defense equipment, enemy attack equipment and an environment state; selecting threat assessment factors, determining the weight of each factor through a preset weight calculation method, quantifying the total threat value of single enemy equipment and a battlefield, and dividing at least two threat levels according to a threshold value; a collaborative decision-making framework comprising a high-level threat evaluation network, a plurality of low-level strategy networks and a time sequence state control module is constructed, the high-level network outputs threat levels and activates corresponding low-level networks, the low-level networks output decision-making actions, and the time sequence module calculates a state change score and judges whether a new decision is triggered or not; and network training optimization is carried out, the network is updated through initialization parameters, partition management track data and a preset algorithm, and the exploration rate is dynamically adjusted. The method has the advantages that decision pertinence and real-time performance are improved; and the decision-making stability of complex electronic warfare scenes is enhanced.

An electronic warfare apparatus includes a Doppler generator configured to change an input frequency of a transmission signal of a radar and output a deception signal having a deception frequency, a distributor configured to distribute the deception signal to a first path and a second path, a noise processing unit located in the first path and configured to mix noise with the deception signal and then control a signal intensity of the noise, a deception signal processing unit located in the second path and configured to control a signal intensity of the deception signal, and a combiner configured to combine a noise signal output from the noise processing unit and the deception signal output from the deception signal processing unit and output a noise mixture deception signal.

The invention discloses a strong electromagnetic protection design method for an electronic warfare unmanned aerial vehicle, and relates to the technical field of electromagnetic protection, electromagnetic interference and electromagnetic compatibility. Establishing an electromagnetic simulation model of the unmanned aerial vehicle and the electronic warfare load, and simulating the electromagnetic environment of the key position; distributing electromagnetic protection indexes of the electronic equipment according to the electromagnetic environment simulation result; front door protection design and rear door protection design are carried out on the equipment level, and comprehensive radio frequency management is carried out on the system level; and carrying out equipment electromagnetic compatibility test verification and full-system electromagnetic compatibility test verification, and finally ensuring compatible work of the unmanned aerial vehicle and the electronic warfare load. The invention provides a top-down strong electromagnetic protection design method for solving the electromagnetic compatibility problem caused by strong electromagnetic interference task loads such as a communication electronic warfare system and a radar electronic warfare system carried by the unmanned aerial vehicle, and the electromagnetic compatibility of the system is improved.

The invention relates to the technical field of national defense, in particular to a multi-sensor collaborative national defense electronic security monitoring system which comprises a sensing network layer, a collaborative perception layer, a control decision layer, a communication facility layer and a countermeasure effect layer. According to the multi-sensor collaborative national defense electronic safety monitoring system, multi-source data of radar, photoelectric and infrared thermal imaging, acoustics and vibration sensing and the like are integrated, multi-dimensional features of electromagnetism, vision, acoustics and the like are covered, complex targets are recognized, false alarms are filtered, and the multi-sensor collaborative national defense electronic safety monitoring system is obtained through the regional fusion module and the central situation fusion module. The method comprises the following steps: constructing a global battlefield situation map from sensor data, reasoning the intention of an enemy in combination with a cognitive engine, automatically adjusting sensor parameters, integrating military optical fibers, satellite communication, ad hoc networks and the like according to environment and task requirements, ensuring data transmission under extreme conditions, and integrating physical interception, electronic warfare and network confrontation through a confrontation effect layer. And a closed-loop logic scheme of detection-decision-strike-evaluation is realized.

The invention discloses an ultra-wideband microwave photonic link with in-band spurious suppression capability, which comprises a laser, an electro-optical modulator, a sideband phase shifter and a photoelectric detector, and is characterized in that the laser is used for outputting an optical carrier signal; the electro-optical modulator is used for modulating a radio frequency input signal to an optical carrier signal to form a modulated optical signal; the sideband phase shifter is used for performing phase shifting processing on the stray sideband to obtain a phase-shifted optical signal; and the photoelectric detector is used for carrying out photoelectric conversion on the phase shift optical signal and restoring a radio frequency signal as a radio frequency output signal. In the invention, coherent cancellation is carried out by adopting an optical domain spurious signal modulation sideband phase shift mode to realize directional suppression of spurious signals, so that spurious signal suppression in an ultra-wide transmission frequency band can be realized, the inherent broadband transmission capability of a microwave photon link is not damaged, and the method can be applied to the fields of radar, electronic warfare, communication, navigation, monitoring and the like.

A high energy laser (HEL) weapon system for counter-UAS (C-UAS) use comprises a fully self-contained laser system including a power supply, thermal management, high-capacity batteries, and integrated radar and electronic warfare subsystems.

This invention discloses a fully enclosed, expandable, air-cooled chassis, relating to the field of electronic warfare equipment technology. It includes an upper cover, a lower cover, and a chassis body. The chassis frame forms an independent air duct cavity and four sets of equipment mounting cavities. Full sealing is achieved through sealing rings and sealing ropes, meeting rainproof and electromagnetic shielding requirements. The frame features standardized interfaces, supporting longitudinal expansion of multiple chassis. The heat dissipation fins are equipped with heat collection chambers and slidably deployable heat dissipation teeth, combined with shape memory alloy heat collection springs and push rods to form an adaptive heat dissipation structure. Under low-power conditions, the heat dissipation teeth are partially embedded; under high-power conditions, they automatically extend and expand, improving heat dissipation area and efficiency. The fan is detachably connected via a fan mounting plate, supporting rapid model replacement. This invention solves the shortcomings of conventional chassis, such as poor environmental adaptability, low expandability, and fixed heat dissipation efficiency, and is suitable for complex electronic systems with high environmental adaptability requirements, such as electronic warfare systems.

The application discloses a multi-mode power amplifier circuit for electronic warfare and a dual-band communication system and belongs to the technical field of microwave integrated circuits. pn The application introduces a plurality of reconfigurable branches with the same structure in the circuit structure, each of which comprises a capacitor C sn , an inductor L pn , a DC blocking capacitor C sn and a switching transistor Q sn , the capacitor C pn and the inductor L pn are connected in parallel to form a band-pass network, one end of the band-pass network is connected with the drain of the switching transistor Q sn through the DC blocking capacitor C sn , the source of the switching transistor Q sn is grounded, the gates of the switching transistor Q sn in the first, second and third reconfigurable branches are connected and are all connected to a DC control power supply V gc . The switching of the ultra-wideband and the communication band can be realized by changing the control voltage of the switching transistor in the reconfigurable branch and the drain power supply circuit of the pre-stage electric amplification path, and the multi-mode operation of the high-performance power amplifier in the ultra-wideband and the dual communication band is realized.

The application belongs to the technical field of electronic warfare, and particularly relates to a single-station interference resource optimization configuration method. When a single-station system faces multiple radiation sources at the same time, the detection probability of each opponent radar is obtained based on the false alarm probability of each opponent radar and the signal-to-noise ratio of each opponent radar; the detection probability of a single radiation source is calculated based on the relationship among the detection probability of each opponent radar, each false alarm probability and each signal-to-noise ratio, and then the minimum fusion detection probability is found out under the condition that the single-station system allocates different interference resources, the single-station interference resource optimization configuration is performed according to the strategy, and the interference power is reasonably allocated so that the detection performance of the entire radar network reaches the minimum. The single-station interference resource optimization mathematical model is proposed, and the optimization configuration of the single-station interference resource when facing multiple radiation sources at the same time is realized.

The application discloses a comprehensive electronic warfare equipment station planning method based on a geographic information system. In the geographic information system, a protection target position, theoretical trajectory data, terrain data and optical end well information are fused to realize automatic and visual station planning of participating interference equipment, reconnaissance equipment and radar equipment and provide guidance for station planning of a test site.

The application provides a cooperative position planning method for long-range support jamming of electronic warfare aircraft, and belongs to the technical field of operational research of carrier-based aircrafts. Firstly, the jamming coverage range of electronic jammers is determined from the aspects of pitch and azimuth in the long-range support jamming scene. Secondly, the jamming effect of the electronic jammers is calculated based on a unified jamming equation. Thirdly, based on the jamming coverage range, a constraint condition and an objective function are designed, and a cooperative position planning problem model of the electronic jammers is established. Finally, based on the cooperative position planning problem model of the electronic jammers, a genetic algorithm is used to solve the optimal position planning scheme of the electronic jammers for long-range support jamming. The application is suitable for the cooperative position planning problem of long-range support jamming of electronic warfare aircraft, and the jammer formation can jam enemy radars when performing a long-range support jamming task, so as to reduce the detection threat of the enemy radars to the strike formation and ensure the smooth execution of the strike task.

The application discloses a KAN-Transformer radar signal classification method based on global context gate enhancement. It aims to solve the technical problem of poor radar signal sorting effect in a complex electromagnetic environment. It includes: 1) standardizing and preprocessing the input PDW sequence; 2) generating a time series feature tensor by using an independent feature embedding strategy; 3) constructing a KAN-based sequence encoding unit by stacking an adaptive spline nonlinear coding layer, using a residual topology structure with a pre-normalization Pre-Norm at each layer, and extracting a time series feature sequence; 4) introducing a gating mechanism at the output end of the encoding unit to suppress interference; and 5) based on the feature vector calibrated by the gating mechanism, using a multilayer perceptron MLP classifier to complete the classification decision of the radar signal. The application can realize efficient and accurate identification of signals in small sample, low signal-to-noise ratio and high pulse loss rate scenarios, and meet the real-time needs of electronic warfare systems.

The application provides a high-precision pattern acquisition method, a direction-finding verification method and device, comprising the following steps: fixing and installing electronic warfare equipment on a rotary table, arranging a radiation source in the direction of the array normal of the electronic warfare equipment with the center of the rotary table as the origin; calibrating the vertical distance from the radiation source to the electronic warfare equipment, measuring the distance from the center of the antenna array to the center of the rotary table; calculating the rotation angle of the rotary table and the angle correction model of the incident angle of the radiation source signal relative to the antenna array by using the measured distance from the center of the antenna array to the center of the rotary table; controlling the electronic warfare equipment to work normally, adjusting the radiation source parameters, and controlling the rotary table to rotate to acquire the pattern data of the electronic warfare equipment; correcting the pattern data by using the angle correction model; and completing direction-finding verification based on the corrected pattern data. The application eliminates the angle deviation caused by the fact that the center of the antenna array of the equipment does not coincide with the center of the rotary table, acquires high-precision pattern data, and improves the direction-finding performance of the electronic warfare equipment.

A system and method are described for updating Machine Learning (ML) models in an electronic warfare (EW) environment. The ML models are updated automatically post mission using threat data of emitters in the EW environment and then deployed to hardware in an aircraft. The updated ML models are used during a subsequent mission and include an unsupervised ML model to deinterleave waveforms received from the emitters and a supervised ML model for emitter identification, waveform tracking, and anomaly detection based on the deinterleaved waveforms. The ML models are updated by augmenting templates that indicate the behavior of the emitters and training the ML models using many plausible superpositions of the augmented templates. The ML models are updated by selecting and applying non-linear augmentations of at least one of the templates and new templates randomly using a Monte Carlo approach.

The invention provides a high-precision directional diagram acquisition method and device and a direction finding verification method and device, and the method comprises the steps: fixedly installing electronic warfare equipment on a rotary table, taking the center of the rotary table as an original point, and arranging a radiation source in the normal direction of the array surface of the electronic warfare equipment; calibrating the vertical distance from the radiation source to the electronic warfare equipment, and measuring the distance from the center of the antenna array to the center of the turntable; calculating an angle correction model of the rotation angle of the turntable and the incident angle of the radiation source signal relative to the antenna array by measuring the distance from the center of the antenna array to the center of the turntable; the electronic warfare equipment is controlled to work normally, radiation source parameters are adjusted, and the rotary table is controlled to rotate to obtain directional diagram data of the electronic warfare equipment; correcting the directional diagram data by using the angle correction model; and completing direction finding verification based on the corrected directional diagram data. According to the invention, the angular deviation caused by misalignment of the antenna array center of the equipment and the center of the turntable is eliminated, high-precision directional diagram data is obtained, and the direction finding performance of the electronic warfare equipment is improved.

The application discloses a bearing clustering method and device based on a heavy frequency distribution entropy and a medium, belongs to the field of electronic reconnaissance of electronic warfare signal processing, and comprises the following steps: introducing the heavy frequency distribution entropy to measure the clustering results of different bearing thresholds, then selecting an optimal bearing threshold according to the change of the heavy frequency entropy to cluster pulses, and finally selecting the optimal bearing threshold to cluster the pulses. The application can effectively improve the sorting capability for densely distributed radiation source targets.

The presently disclosed subject matter aims for an electronic warfare system including: (i) a Radar Warning Receiver (RWR) configured to receive: (a) at least one first signal being a radar emission signal emitted by a respective radar-based system in a first frequency spectrum, and (b) at least one second signal being a non-radar emission signal in a second frequency spectrum; and, (ii) a processing circuitry, being in communication with the RWR, configured to: obtain from the receiver the at least one first and second signals; analyze the at least one first signal and the at least one second signal to determine a set of characteristics associated with each of the signals; and upon the set of characteristics of at least one signal of the signals meeting a respective predefined set of characteristics, perform an action.

The application relates to a broadband low-noise microwave photon link, comprising a low-noise light source, a modulator connected with the low-noise light source and a photoelectric detector connected with the modulator, the low-noise light source is used for generating a laser signal, and the laser signal is sequentially subjected to optical amplification and narrow-band photon filtering, so that a high-power low-noise laser signal is output as an optical carrier of an electro-optic intensity modulator. In the application, the RIN noise of the laser source is suppressed by adopting the combination of optical amplification and optical filtering, the high-power low-noise laser signal is output, the noise coefficient of the microwave photon link can be reduced, and the application can be used in application fields such as radars, electronic warfare, communication, navigation and monitoring.

The invention provides an electronic warfare equipment stand-alone positioning capability verification device and method, the device comprises a flight platform, and electronic warfare equipment, an inertial navigation simulator and display control equipment which are carried on the flight platform, and the flight platform flies around a radiation source target; wherein the electronic warfare equipment is used for acquiring reconnaissance data of a radiation source target and completing positioning, a positioning algorithm is built in the electronic warfare equipment, and the positioning algorithm is used for performing positioning calculation on the radiation source target according to the reconnaissance data and inertial navigation data; the inertial navigation simulator is used for providing real-time inertial navigation data and a radiation source target position; and the display control equipment is used for verifying the positioning settlement result of the electronic warfare equipment by using the radiation source target position provided by the inertial navigation simulator. According to the invention, verification of the single-machine positioning capability of the electronic warfare equipment is realized in a desktop environment, on one hand, the test verification efficiency is improved, on the other hand, a scene required by positioning can be flexibly and conveniently simulated, and manpower and material resource consumption of flight test verification is saved.

The application provides a radar jamming decision and parameter optimization method and device based on hierarchical reinforcement learning, which comprises the following steps: constructing a radar countermeasure model; according to the radar countermeasure model, establishing state-action samples of radar working modes and jamming styles; according to the collected samples, an outer Q-Learning network obtains an optimal jamming strategy; an environment of an inner DDPG network is constructed, and the jamming strategy obtained by the outer layer is mapped to the inner DDPG network; an inner DDPG network model is constructed, the optimal jamming strategy is pulse parameter optimized by selecting actions on a continuous parameter space; an interference effect evaluation algorithm based on AHP-TOPSIS is used to evaluate the interference effect, and the interference effect evaluation result is used as environment feedback to update the radar countermeasure model; the application is suitable for cognitive jamming decision and parameter optimization in radar electronic warfare, the interference effect is evaluated by using the evaluation algorithm based on AHP-TOPSIS, and then the jamming decision and parameter optimization are carried out by using the model based on hierarchical reinforcement learning.

This invention is a robust pressure testing system designed for harsh environments with minimal user interaction and easy maintenance. It utilizes standardized electromechanical components and relay logic, avoiding custom elements to ensure long-term reliability and reduce obsolescence. The system operates at 24 VDC and accepts AC, internal battery, or external DC power, with overcurrent protection provided by fuses and breakers. It can pressurize and evacuate test volumes to user-specified levels, monitoring for leaks through pressure decay. The pneumatic system generates positive and negative pressures, controlled by electrically actuated valves, with filters and dryers preventing contamination. The instrumentation includes a pressure transducer and process timer for precise measurements, enhancing usability and adaptability in varied environments. Modular components and self-diagnostic features further improve system performance and compatibility.

The application discloses a dual-mode microwave power amplifier circuit for electronic warfare and communication systems and belongs to the technical field of microwave integrated circuits. The dual-mode microwave power amplifier circuit comprises an ultra-wideband front-stage amplification circuit and an ultra-wideband rear-stage amplification circuit. The ultra-wideband front-stage amplification circuit amplifies input signals and adjusts gate voltages. The rear-stage amplification circuit further amplifies output signals of the front stage and outputs the signals. Both the two-stage amplification circuits can switch between ultra-wideband and single communication frequency bands through reconfigurable branches. The switching can be realized by adjusting control voltages. Moreover, the center frequency of the single passband can be changed by changing the values of capacitors and inductors in the reconfigurable branches. The mode switching between the ultra-wideband and the communication frequency band can be realized through on-chip voltage control. The performance is maintained well before and after the switching, and the problem of dual-mode operation of high-performance power amplifiers in the ultra-wideband and the communication frequency band is solved.

The invention discloses a microwave photon interference scheme with a self-interference elimination function for a synthetic aperture radar. The invention relates to the technical field of radars and the technical field of microwaves, and is mainly applied to microwave photon interference signal generation and self-interference cancellation. The method is shown in an attached drawing, and comprises a laser device LD, a double-parallel dual-drive Mach-Zehnder modulator DP-DDMZM, an electric delay line DL, an electric attenuator ATT and a photoelectric detector PD. A sub-modulator DDMZM1 of a dual-parallel dual-drive Mach-Zehnder modulator DP-DDMZM is used for eliminating a self-interference signal, and a periodic rectangular pulse signal input to a lower radio frequency port of a sub-modulator DDMZM2 is used for realizing periodic change of an optical carrier amplitude. Periodic change of an optical carrier phase is realized through a periodic rectangular pulse signal input to a bias voltage port of the main modulator MZM, and finally photoelectric conversion of an optical signal output by the DP-DDMZM is completed through the photoelectric detector PD, so that flexible and effective two-dimensional interference and elimination of a self-interference signal on a distance domain and an azimuth domain can be realized at the same time. The two-dimensional interference signal generation and self-interference cancellation functions are integrated, parameter tuning is flexible, the structure is simple, the real-time performance is good, the generated interference signal is high in frequency band, the instantaneous bandwidth is large, the working range is wide, and the radar electronic warfare requirement and development trend at present are met.