125 results about "Interference wave" patented technology

The invention belongs to the technical field of seismic exploration, and discloses a pre-stack gather optimization method based on multi-dimensional constraint dynamic time warping, which remarkably improves the space continuity and stability of a time shift field. According to the method, the time shift field which is smoother and more continuous in a three-dimensional space can be generated, and the common abnormal jump and unreasonable jitter of the time shift field in a conventional DTW method are effectively inhibited. This better conforms to the gradient characteristics of the geologic structure. Mismatching and processing illusion are effectively avoided, the adaptability of a complex structure area is improved, the global optimization capacity of the DTW algorithm is enhanced through multi-dimensional constraint, and the phenomenon that different horizons or effective waves are wrongly matched with interference waves due to local waveform complexity or noise interference is reduced. Therefore, common processing illusions such as event dislocation and local distortion in a conventional DTW method can be remarkably reduced.

The invention relates to the technical field of radio navigation and countering, and particularly discloses an unmanned aerial vehicle interference system and device based on phased array radar direction finding. The system comprises a phased array radar direction finding module, an environment electromagnetic propagation characteristic modeling module, an interference beam dynamic planning module and a digital beam forming interference module. Through constructing a three-dimensional electromagnetic propagation model and based on propagation loss and a multipath effect predicted by the model, a beamforming weight used for pre-compensating environmental influence is optimized and calculated, and finally an interference antenna array is driven to radiate an intelligent beam subjected to environmental pre-compensation, so that high-intensity interference is formed at an actual physical position of a target unmanned aerial vehicle, and the target unmanned aerial vehicle is subjected to environmental pre-compensation. Direction finding errors are overcome, and interference efficiency and electromagnetic compatibility are improved.

The invention belongs to the technical field of Internet of Things data processing, and discloses a multi-mode Internet of Things sensor data fusion processing method and system. Comprising the following steps: acquiring multi-modal sensor data in a monitoring environment; performing interference source positioning analysis on the data to generate an interference source distribution map; separating interference waveform characteristics of each modal data based on the distribution map; constructing an interference propagation network by using the features so as to quantify the coupling relationship of interference among different modes; performing noise correlation weakening on original data based on the network to obtain decoupled sensor data; performing dynamic fusion analysis on the decoupling data, and constructing a multi-modal fusion feature vector; and finally, accurately detecting a target event or state based on the feature vector. According to the method, the negative influence of noise correlation on fusion is eliminated, and the accuracy and robustness of target detection and the reliability of the system in a complex environment are improved.

The invention discloses a distribution network traveling wave head analysis and fault location method and system based on edge calculation. The method comprises the steps that S1, terminal parameters are configured on a power distribution terminal; s2, monitoring a traveling wave signal and a power frequency electrical quantity of the distribution line in real time, and starting wave recording when a traveling wave amplitude exceeds a threshold value; s3, wave recording data are screened through the power frequency electrical quantity change and the traveling wave starting sequence; and S4, carrying out wave head detection on the fault initial traveling wave recording data, carrying out section determination on the fault so as to carry out double-end distance measurement, and then carrying out correction processing on the distance measurement result of the power distribution terminal located in the fault section based on the line section parameters. According to the method, a marginal distribution calculation mode is adopted, and fault identification, wave recording screening and positioning calculation capabilities are integrated on a power distribution terminal side, so that the data communication traffic and the calculation pressure of a master station are greatly reduced, real faults and interference wave recording can be effectively distinguished, and distance measurement errors caused by wave velocity differences in a mixed line in a traditional method are overcome.

[Object]Provided are a radar apparatus that can prevent the leakage of interference waves from a radome, and an on-vehicle sensing system including the radar apparatus.[Solving Means]The radar apparatus of the present disclosure includes a substrate having an antenna structure in which a radiating portion for a radio wave is provided on a first surface, a radome disposed to face the first surface of the substrate, and a radio wave absorbing member disposed between the substrate and the radome, having an opening formed in a portion corresponding to the radiating portion, and including an insulator configured to absorb a radio wave.

The invention relates to the technical field of electronic countermeasures, in particular to an unmanned aerial vehicle group dynamic interception method and system based on distributed interference array collaboration. According to the method, an interference node cluster with autonomous logic association is dynamically deployed in a defense domain, and an elastically reconfigurable distributed interference field domain is formed through a software defined radio architecture; time-varying spectrum features are extracted through an adversarial neural network, and a dynamic threat fingerprint database is constructed; generating an interference vector with frequency band following and power self-adaption based on the dynamic threat fingerprint database, and updating the feature weight of the dynamic threat fingerprint database in real time according to interference efficiency feedback; and according to the situation evolution trend of the dynamic threat fingerprint database, a hierarchical interference wave sequence is generated based on a multi-agent consensus protocol, and a space-time coupled interception chain is formed. Through the method, the whole-process dynamic confrontation capability of the unmanned aerial vehicle group is realized, the efficient interception performance is maintained in a complex electromagnetic environment, and meanwhile, the interference risk on legal communication is reduced.

The invention provides a phase change blasting excitation seismic wave reflection method, a medium, equipment and a product, and relates to the technical field of tunnel engineering, the method comprises the following steps: arranging a detection hole and a plurality of blasting holes in a tunnel face, placing blasting tubes in the blasting holes, placing detectors in the detection hole, and generating seismic waves through phase change blasting; carrying out longitudinal wave and transverse wave separation on seismic wave signals detected by a detector, processing longitudinal waves and transverse waves by adopting a two-dimensional F-K digital filtering method, filtering interference waves, separating effective waves and direct waves, and dividing a data set of the effective waves into a training set and a test set; building a prediction model of the unfavorable geological disaster body in front of the tunnel face based on a support vector machine, and obtaining optimal parameters of the model by using a particle swarm algorithm; and training and testing the model by using the training set and the test set, and applying the tested model to tunnel geological forecast. According to the method, the accuracy of advanced geological forecast of the gas tunnel is improved, and the gas explosion risk is reduced.

Provided in the present application are a communication method and a communication apparatus, which can be applied to the field of communications. In the technical solutions provided in the present application, a communication device may predict, on the basis of historical interference information of an interfering satellite to a serving satellite and state information of the interfering satellite, interference of the interfering satellite to the serving satellite at a future time point. In this way, when it is detected that future interference information is greater than a threshold, the serving satellite may instruct the interfering satellite to disable a corresponding interfering beam or change a beam modulation and coding scheme, so that interference to communication can be reduced, and communication performance can be ensured.

The application relates to a wideband high-power microwave protection module design method based on field line coupling, and belongs to the technical field of circuit simulation. The method comprises the following four steps: testing the response of a protection device under a nanosecond pulse; constructing an equivalent circuit model of a pulse source and the protection device; designing a protection module and simulating the characteristics of the protection module through a field line coupling method; and optimizing the protection module. The application has the following advantages: the field line coupling characteristics are considered, a protection module protection performance verification model is constructed, a cable coupling interference waveform is used to verify the protection performance of the protection module, and the accuracy of the protection performance simulation of the protection module is improved.

Embodiments of the present application provide a kind of processing method and device of audio signal, it is related to media technical field, the method comprises: using N beams respectively to the audio signal to be handled is carried out beam processing, obtains N beam signals, N is greater than or equal to 2 integer;The audio signal to be handled is in target sound pickup range, and the audio signal including at least one sound source is collected by microphone, the coverage range of the N beams is in target sound pickup range;And determine N beam signals main beam signal and N-1 interference beam signals, the main beam signal is the beam signal of target sound source;And the adaptive filtering is carried out to main beam signal and N-1 interference beam signals, to obtain target sound source enhancement signal.Using the method provided in the embodiments of the present application, the interference signal in audio signal can be effectively suppressed, and the quality of audio signal is improved.

The utility model discloses an anti-interference shielding type data connecting line, which belongs to the technical field of data connecting lines, and is characterized by comprising a data line main body, the data line main body comprises a rubber material shell, a connector is arranged in the rubber material shell, and the data line main body is connected with a data transmission wire through an insulating layer and a sub-shielding layer of the data transmission wire in a transmission line. Through the synergistic effect of multiple layers of electromagnetic protection structures such as a main shielding layer of a central wire bundle, an outer anti-interference wave-absorbing layer and the like, an all-dimensional and multi-layer electromagnetic interference resisting system is formed, and the electromagnetic interference resisting system can be applied to conditions such as a strong electromagnetic radiation source in an industrial environment and complex radio frequency interference in a communication environment. The high-quality data transmission device can effectively block and absorb external electromagnetic interference even in a complex electromagnetic environment, guarantees the accuracy and stability of data transmission to the maximum extent, avoids the problems of data transmission errors and signal distortion and even interruption, and meets the requirements for high-quality data transmission in the complex electromagnetic environment.

The invention relates to quantum key distribution, in particular to a quantum key distribution and classical optical communication common-fiber transmission system and method, and the system comprises a signal transmitting unit which generates and transmits a quantum optical signal and a classical optical signal; the channel parameter adjusting unit is used for adjusting and controlling the power and time delay of the classic optical signal so as to reduce common fiber interference; the wavelength division multiplexing transmission unit is used for combining, transmitting and separating the quantum optical signal and the regulated and controlled classical optical signal; the signal receiving unit is used for receiving the separated optical signals and decoding, detecting or measuring the optical signals; the control center is used as a core decision-making and coordination unit of the system and realizes state monitoring, data analysis and flow scheduling of the system through staged control; according to the technical scheme provided by the invention, the defects that the key distribution quality is reduced and the key generation rate is reduced when the quantum optical signal and the classical optical signal are subjected to common-fiber transmission in the prior art can be effectively overcome.

The present disclosure provides a holographic antenna, a beam control method thereof, a storage medium and an electronic device, and belongs to the technical field of antennas. The present disclosure can solve the problem that the existing antenna structure is complex and the polarization direction is not variable. The holographic antenna comprises a dielectric substrate, a radiation layer and a plurality of switch units. The radiation layer is provided with a plurality of slit openings. The switch units are arranged correspondingly to the slit openings. The holographic antenna further comprises an acquisition unit configured to acquire a target wave and a polarity of the target wave; a construction unit configured to construct a reference wave based on the polarity of the target wave; a calculation unit configured to calculate an interference wave based on the reference wave and the target wave; a sampling unit configured to obtain an excitation sampling value of each slit opening; and a control unit configured to control the switch units to control the switching state of the slit openings. The present disclosure can realize dynamic reconfiguration of different polarizations by using the holographic principle combined with a slot antenna.

This invention discloses a multi-target adaptive jamming system based on an array antenna, belonging to the field of electromagnetic countermeasures and signal processing technology. The system includes an array antenna unit, a multi-channel RF front-end, a signal processing and control unit, and an environmental sensing unit. The array antenna scans the airspace and captures signals from multiple targets; the signal processing and control unit runs various algorithms to estimate the azimuth, frequency, and power parameters of multiple targets; an interference suppression matrix is ​​constructed based on singular value decomposition, generating multiple low-sidelobe focused jamming beams aimed at each target; the environmental sensing unit monitors background noise intensity in real time and dynamically adjusts the transmission power through a noise adaptive power control algorithm. This invention overcomes the shortcomings of traditional jamming techniques, such as energy dispersion, poor environmental adaptability, and unintelligent resource allocation. It can simultaneously achieve efficient and precise jamming of multiple targets, significantly improving the suppression ratio of a single target, and maintaining high jamming efficiency and resource utilization even in high-noise environments.

To provide a sensitivity measuring device and a sensitivity measuring method capable of measuring spectral sensitivity distribution of a light receiving element to be measured in a short time.SOLUTION: The sensitivity measurement device includes a light source, an optical system, a light collection mechanism, a position adjustment mechanism, a measurement unit, and an analysis unit. The optical system is configured to generate an interference wave by splitting light from a light source into two beams and causing the two beams to interfere with each other, and includes an optical path length difference changing mechanism configured to change an optical path length difference. The condensing mechanism condenses the interference wave at an irradiation position on the light receiving surface of the measured light receiving element. The position adjustment mechanism changes an irradiation position of the interference wave in a direction along the light receiving surface. The measurement unit controls the irradiation position and acquires a signal obtained by converting the interference wave from the light receiving element to be measured. The analysis unit calculates a component of the signal of each wavelength by Fourier transform of an interferogram obtained from the optical path length difference changed by the optical path length difference changing mechanism and the intensity of the signal measured by the measurement unit.SELECTED DRAWING: Figure 1

The application discloses a kind of lining demolition operation in geological anomalous body detection method and signal processing method, first, by being arranged in the lining inside and the cutting route parallel two detection lines in multiple detectors, vibration signal between cutting disc and concrete lining in the lining cutting operation process is acquired in real time, and vibration signal obtained in real time is handled.Then, the vibration signal after processing is carried out two-dimensional fast Fourier transform, and the frequency-wave number spectrum corresponding to vibration signal is obtained.Afterwards, dispersion curve and reflected wave signal are extracted from the frequency-wave number spectrum.Finally, dispersion curve is carried out interference wave inversion, and the shear wave velocity spectrum inside the geological body behind lining is obtained, and reflected wave signal is inverted and imaged, and the reflected interface image inside the geological body behind lining is obtained.Combining reflected interface image and shear wave velocity spectrum can accurately locate the anomaly of the geological body behind lining, and effectively detect the geological body anomaly behind existing lining.

This invention relates to a method and apparatus for designing seismic data acquisition trace spacing. The method includes: determining different first apparent velocities of effective waves and different second apparent velocities of interfering waves based on raw single-shot data; determining a first frequency corresponding to a first preset minimum energy value for each effective wave and a second frequency corresponding to a second preset minimum energy value for each interfering wave; determining a first candidate maximum wavenumber for each effective wave that does not produce spatial aliasing based on the first frequency and the first apparent velocity, and determining a second candidate maximum wavenumber for each interfering wave that does not produce spatial aliasing based on the second frequency and the second apparent velocity; determining a target maximum wavenumber from the first and second candidate maximum wavenumbers, and then determining the seismic data acquisition trace spacing for the target work area; and designing a trace spacing that can balance exploration costs and technical requirements using old single-shot data, saving costs and fully utilizing the value of old data.

The application belongs to the technical field of vector hydrophone, and particularly relates to a kind of column barrier under vector circular array element domain sound pressure vibration velocity joint anti-interference beam forming method, according to the model of vector circular array under cylindrical barrier plate, the element domain sound pressure guiding vector, radial vibration velocity guiding vector and tangential vibration velocity guiding vector are constructed, and then the spatial filtering pretreatment matrix is designed, the output data of vector array is preprocessed;Then use the sound pressure vibration velocity mutual covariance matrix generated by the filtered element domain data of each channel to combine the beam forming of each channel guiding vector, passive detection of target is realized, and the simulation experiment verifies that the achievement can improve the anti-interference ability of vector circular array under cylindrical barrier plate.

The application belongs to the field of oil and gas geophysical exploration, and discloses a kind of geophone combination to improve the calculation method of signal-to-noise ratio degree of single shot data, and the signal-to-noise ratio of geophone combination is improved multiple times compared with geophone single point G , the surface wave suppression amplitude value of geophone combination b 1, the refraction wave suppression amplitude value b 2, the reciprocal of the signal-to-noise ratio of geophone combination suppression random interference wave b 3, the amplitude ratio of surface wave and refraction wave k , the surface wave suppression coefficient, refraction wave suppression coefficient and random interference wave suppression coefficient of geophone combination are obtained, and finally the formula of the signal-to-noise ratio improvement multiple of geophone combination compared with geophone single point is obtained.The application is suitable for calculating the degree of signal-to-noise ratio of single shot data improved by geophone combination, the calculation result is clear, the reliability is strong, the calculation method is fast, and the quantitative basis can be provided for the selection of geophone combination number and group distance in seismic acquisition engineering technical design.

This invention provides an electromagnetic compatibility (EMC) testing method and system, relating to the field of EMC testing technology. The method includes: collecting background noise and constructing a background noise feature library when the device under test (DUT) is not powered on; collecting time-domain waveform data when the DUT is powered on and running, performing sliding window matching with the background noise feature library to filter strong background noise windows; constructing a reference signal using the strong background noise windows, extracting candidate interference waveforms after adaptive filtering to remove background noise, and then filtering steady-state interference waveforms through segmented energy accumulation and fluctuation amplitude analysis; comparing the steady-state interference waveforms with standard limit lines to mark the exceeding frequency bands and their time-domain waveform segments; finally, extracting time-frequency joint features and inputting them into a classification model to output interference source type identification results. This invention can effectively remove complex background noise in the field, accurately extract the device's own steady-state interference, and automatically identify the interference source type, improving the accuracy and intelligence level of EMC testing.

The application discloses a wind wave test system for testing an interference wave field under a static and dynamic section model, which comprises two support devices symmetrically arranged at two ends of the section model and located outside the test section, the support device comprises a stand column, the stand column is connected with a horizontal circular steel pipe, the end of the horizontal circular steel pipe is connected with a force sensor, and the force sensor is connected with two ends of a main shaft extending to the outside of the side wall of the wind tunnel; a hole in the form of a four-prism table is arranged in the lower part of the upper surface of the center of the section model, and a wave height instrument suspension component is arranged in the hole; the wave height instrument suspension component comprises a bearing sleeved on the main shaft, and a wave height instrument fastener in the form of a rectangular sleeve is connected below the bearing; static end plates or dynamic end plates are arranged at the two ends of the section model; the application can realize the test of the interference wave field under the section model under different clearances and different incoming flow wind attack angles, greatly saves the test cost, enriches the test content, and is more operable.

The invention discloses a multi-target pointing intelligent anti-interference beam generation method, and belongs to the crossing field of digital communication and artificial intelligence. The method comprises the following main steps: constructing a data set, generating a moving target pointing prediction intelligent model, generating an antenna pattern which aims at multi-target pointing and has an anti-interference capability, and realizing multi-target tracking and interference suppression. According to the invention, for the problems of errors and time delay in moving target positioning and the requirements of multi-direction pointing and multi-direction suppression, a method of predicting a target position by deep learning and generating a multi-antenna phase control antenna beam in parallel by an optimization algorithm is adopted, so that enhancement and suppression in multiple directions can be realized at the same time; the modular design is adopted, so that the module reusability is high, the framework processing logic is visual, and the process is clear and concise.

The application belongs to the field of electronic countermeasures and satellite communication interference technology, and discloses a kind of star chain satellite communication link intelligent interference method and device based on phased array antenna to solve the problems of insufficient interference beams and poor interference effect in traditional technology;Firstly, the application can generate and control multiple interference beams simultaneously based on analog-digital hybrid phased array antenna, realizing the synchronous coverage and interference of multiple "star chain" satellite links in the upper air;Secondly, through high-precision estimation of OFDM signal parameters based on cyclic spectrum, accurate signal feature guidance is provided for interference;Finally, based on the extracted signal feature parameters, an intelligent decision mechanism is introduced, and through interference waveform library construction and efficiency function optimization, dynamic and adaptive selection of interference waveform and parameters is realized, thus changing the inefficient mode of relying on preset waveform;Therefore, the application significantly improves the pertinence, adaptability and overall efficiency of the interference system.

Provided is an elastic wave device that can suppress an IMD and can suppress deterioration of reception sensitivity. An elastic wave device (1) includes a piezoelectric substrate (2), a first IDT electrode (3), reflectors (4A, 4B) provided on both sides of the first IDT electrode (3) in an elastic wave propagation direction, and a second IDT electrode (5) provided so as to sandwich the reflector (4A) and oppose the first IDT electrode (3) and constitute a second IDT (5A). The first and second IDT electrodes (3, 5) have a plurality of electrode fingers that overlap each other in the first and second intersection regions (A, B) in the elastic wave propagation direction. The first and second intersection regions (A, B) overlap each other in the elastic wave propagation direction. A third bus bar (16) of the second IDT electrode (5) is connected to a first bus bar (12) of the first IDT electrode (3), and a fourth bus bar (17) of the second IDT electrode (5) is connected to a ground potential. A resonance frequency of a portion including the second IDT electrode (5) is included in a frequency band of an interference wave signal.

This application provides a method and apparatus for measuring interference, capable of measuring beam lobe interference. The method includes: a first communication device transmitting reference signals on N time-frequency resources using N beams; a second communication device receiving the reference signals on the N time-frequency resources corresponding to the N beams; the N beams and N time-frequency resources are in one-to-one correspondence; a first beam among the N beams is the serving beam corresponding to the second communication device; at least one second beam among the N beams is an interfering beam corresponding to the second communication device; the first communication device receives indication information from the second communication device, indicating that the signal reception power of the reference signal received by the second communication device using a third beam on the first time-frequency resource corresponding to the third beam is greater than or equal to a first threshold, and the direction of the third beam satisfies a first condition with the direction of the first beam; at least one second beam includes the third beam; and the N time-frequency resources include the first time-frequency resources.

The present application relates to a kind of multi-domain denoising method, device, storage medium and equipment.The method comprises the following steps: S1, obtaining original gather.S2, original gather is carried out multi-domain wave field transformation.S3, the gather data in each information processing domain is respectively carried out specific interference wave elimination.S4, after the gather of interference wave elimination, wave field is reversed and all gather data after wave field reversal is merged to form optimized gather.Can reduce the error of different domain multiple denoising, improve original gather denoising precision, improve data quality, more in line with actual geological conditions, can provide reliable basis for exploration deployment.

This invention belongs to the field of marine electromagnetic detection technology, specifically relating to a decoupling method for wave-induced electromagnetic signals based on multi-scale symmetrical reconstruction. The method includes: performing multi-scale shear wave transform on the noise-interferenced wave-induced electromagnetic signal to extract shear wave coefficients at different scales and directions; utilizing the correlation and randomness differences between noise and the effective signal to remove shear wave coefficients dominated by noise interference, obtaining shear wave coefficients at each scale and direction dominated by the effective signal; calculating the energy entropy of the shear wave coefficients at each scale and direction dominated by the effective signal, comparing and processing them with a preset energy entropy threshold to obtain updated shear wave coefficients; identifying step points and reconstructing their shear wave coefficients; and using inverse shear wave transform to obtain a clean wave-induced electromagnetic signal. This invention can effectively suppress background noise interference and achieve accurate decoupling of wave-induced electromagnetic signals.

The invention discloses a DAS VSP data interference wave identification method and device, electronic equipment and a medium. The method can comprise the steps that multi-parameter feature analysis is conducted on DAS VSP data; performing interference wave identification according to the analyzed multi-parameter characteristics; and outputting a data channel number containing the interference wave as a final interference wave identification result. According to the method, the DAS-VSP data is subjected to multi-parameter feature extraction, and the interference waves are analyzed and recognized based on the wave field features, so that simple and effective DAS-VSP data interference wave recognition is realized.

The present technology relates to: a GNSS receiver capable of continuously detecting an interference wave for a satellite signal even after a reception setting has been switched; a reception method; and an information processing terminal. A GNSS receiver according to one aspect of the present technology comprises: a first signal processing unit that receives satellite signals from a plurality of satellite systems and uses a variable-bandwidth IF filter to output a signal within a prescribed IF signal frequency band; and a second signal processing unit that, with respect to the signal output by the first signal processing unit, performs frequency conversion based on an oscillation signal generated by an oscillator having a variable oscillation frequency, and generates a baseband signal. An interference wave for a satellite signal is detected on the basis of the signal which has passed the IF filter, and after a reception setting is switched from a first setting used when there is no interference wave to a second setting used when there is an interference wave, the reception setting is temporarily returned to the first setting to detect an interference wave. The present technology can be applied to mobile devices such as smartphones.