181 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 provides a multi-sensor data fusion method and system based on an intelligent pod. According to the method, a radiation data flow of an intelligent pod multispectral sensor in an electromagnetic interference field is collected; based on the data, the quantitative attenuation coefficient of the radiation value of each wave band in the interference field is calculated by using a radiation transfer equation. And generating a directional beam of the phased-array antenna by using the coefficient, and scanning a target area to obtain echo data. And finally, performing joint sparse representation on the original radiation data stream and the target echo data to generate a fusion result. The invention discloses multi-sensor data fusion based on an intelligent pod. According to the method, the anti-interference wave beam scanning target is dynamically generated by quantifying the attenuation of electromagnetic interference on radiation of each wave band, and the sensing performance of the intelligent pod in a complex electromagnetic environment is improved by combining the joint sparse representation and fusing the multi-source data.

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.

This user device is for a 5G mobile communication system comprising memory and a processor. The user device performs a beam sweep using a resource block allocated by a base station, acquires information based on the noise intensity of an interference wave measured by an adjacent user device as a result of performing the beam sweep, and determines a beam to be used on the basis of information regarding an interfering beam.

The invention provides a seismic trace gather far offset energy preserving processing method, which comprises the following steps of: 1, decompiling field seismic data, and performing first arrival picking and trace gather extraction processing; 2, performing high-order dynamic correction processing on the extracted gather data to improve the influence of conventional dynamic correction stretching on the far offset; step 3, performing space-time variation cutting on gather first arrival waves and interference waves by adopting control points; step 4, performing offset resolution improvement processing on the gather data, and further improving the frequency dispersion problem of the far-offset data; and step 5, carrying out deconvolution, superposition and migration processing on the far-offset information preserving gather to obtain far-offset energy preserving seismic result data. According to the seismic trace gather far-offset energy maintaining processing method, recovery and maintenance of far-offset energy in seismic trace gather data can be realized, the imaging quality of seismic data of middle and shallow layers is improved, and recovery and maintenance of far-offset information are realized.

To suitably control the influence of cross-link interference.SOLUTION: User equipment is a user equipment of a 5G mobile communication system that includes a memory and a processor, performs beam sweeping using resource blocks allocated by a base station, obtains information based on the noise intensity of interference waves measured by adjacent user equipment as a result of performing the beam sweeping, and determines a beam to use on the basis of information regarding interfering beams.SELECTED DRAWING: Figure 7

The present disclosure provides an interference mitigation cartridge for cardiac vibrational waves. The reduction box comprises an upper end face, side faces, a bottom face and a box body inner cavity defined by the upper end face, the side faces and the bottom face. The impedance wave-absorbing layer on the upper end surface comprises a carbon fiber epoxy layer, a silica gel carbon powder layer and a porous silicone rubber layer of which the impedance values are gradually reduced from large to small, and a through hole is formed in the center of the impedance wave-absorbing layer; the through hole penetrates through the upper lining layer to form an upper inner layer facing the inner cavity of the box body; the damping resonant cavity is formed after a gap between the lower surface of the porous silicon rubber layer and the upper surface of the upper lining layer is sealed at the side edge; the input vibration acquisition plate is embedded into a groove which is sunken downwards from the upper surface of the impedance wave-absorbing layer and is used for receiving and conducting input vibration containing heart vibration waves and environmental interference waves; and the vibration wave sensor is connected with the lower surface of the input vibration acquisition plate through a magnetic connecting piece, is arranged in the inner cavity of the box body and is used for receiving heart vibration waves.

The invention belongs to the technical field of discharge noise processing, and particularly relates to a staff noise reduction method for partial discharge of an ethylene propylene rubber cable. Comprising the following steps of: 1, processing a periodic narrow-band interference signal by adopting an energy ratio method, and removing the narrow-band interference in a partial discharge signal; 2, reprocessing the processed point signal by adopting a generalized S transformation mode; carrying out modular matrix algorithm transformation on the high-frequency partial discharge signal; 3, setting a basic value gamma by adopting a smaller threshold method, and obtaining the number of all narrowband interferences; 4, acquiring effective data of the center frequency; 5, wave crest data below the standard curve are set as interference frequency data, and the wave crest value is an interference wave crest; 6, extracting frequency peak values corresponding to all narrowband interference signals in the atlas according to the interference peak definition; and 7, setting a frequency spectral line corresponding to the peak value as kp. The method is more thorough in noise processing and has good application value.

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 an intelligent electric power system remote monitoring device and a monitoring method thereof, relates to the technical field of electric power monitoring interference prevention, solves the problem that comprehensive and deep feature extraction is difficult to perform on complex waveforms, and provides an intelligent electric power system remote monitoring device and a monitoring method thereof through careful analysis of signal waveform features in a monitored line. A scientific characteristic value sequence recognition system is established; aiming at the standard waveform of each monitoring item, the characteristic value sequence of the standard waveform is accurately locked, and whether the signal waveform is interfered or not can be sensitively identified by virtue of change characteristic analysis and characteristic sequence matching; according to the method, the abnormal waveform points and the interference waveforms are accurately calibrated, a proportion value judgment method is applied, misjudgment caused by parameter numerical value fluctuation is effectively avoided, the interference recognition accuracy is greatly improved, frequency filtering is directly carried out on the waveforms which do not belong to monitoring items, and the filtering efficiency is improved; for the waveforms belonging to the monitoring item, the time of different waveforms is ingeniously adjusted by determining a time difference characteristic sequence.

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 field of speech analysis, and discloses a natural sound interference stripping algorithm and an application thereof in noise monitoring, which are used for efficiently and accurately stripping interference components in a target speech signal in a complex natural sound environment. Comprising the following steps: synchronously acquiring an environmental sound signal by using a spatially distributed microphone array, generating an original mixed voice signal with spatial coherence, performing real-time fractional order differential processing, strengthening resonance characteristics, realizing spatial separation of a voice guided wave mode and an interference radiation mode through real-time phase analysis, and extracting an interference radiation mode component. And reconstructing a time domain interference waveform, and outputting a pure target voice signal according to the original mixed voice signal and the reconstructed interference waveform. The system has the functions of residual interference sound energy recovery, equipment vibration suppression, environment sudden change monitoring, system resetting, bimodal output and the like, the stability, reliability and practicability of the system are effectively improved, and pure voice can be accurately extracted in a complex environment.

The invention discloses an anti-interference L-band microwave remote sensing radiometer, and the radiometer comprises a radio frequency receiving assembly which comprises a miniaturized array antenna, a single-pole three-throw switch, a band-pass filter, a low-noise amplifier, a frequency mixer, a local oscillation source, an intermediate-frequency filter, an intermediate-frequency amplifier, and a detector; a signal control and acquisition assembly; a calibration component; a data processing and transmitting component; the miniaturized array antenna is used for receiving a radio frequency noise signal in a target direction; the single-pole three-throw switch is used for respectively switching and receiving the radio frequency noise signal in the target direction, a radio frequency noise signal after heat source matching and a radio frequency noise signal after cold source matching; a radio frequency noise signal is processed through a band-pass filter, a low-noise amplifier, a frequency mixer, an intermediate-frequency filter, an intermediate-frequency amplifier and a detector in sequence, and a detection signal is combined with a calibration algorithm to complete noise temperature measurement in a target direction; the data processing and transmission assembly transmits the data to the platform. The radiometer provided by the invention has strong anti-interference capability and can be used for various scenes for retrieving environmental parameters.

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.