336 results about "Interference reduction" patented technology

The invention provides a satellite navigation interference detection and suppression system and method, and belongs to the technical field of signal analysis. The sensor module is used for determining a target area where a sensor is installed according to a target detection sky, and deploying and installing the sensor in the target area to obtain original signal data of a satellite; the signal processing module is used for standardizing the original signal data to obtain standard signal data and converting the standard signal data into a first frequency spectrum; the feature recognition module is used for analyzing features of the first frequency spectrum through fast Fourier transform and screening signal points with abnormal fluctuation; the interference analysis module is used for classifying the features of all the signal points and matching corresponding interference categories to obtain all interference categories of the original signal data; and the interference suppression module is used for adjusting parameters in real time to reduce interference by using an adaptive filter according to the dynamic characteristics of the interference category. The reliability of navigation signals is improved, and the anti-interference capability is enhanced.

Aspects of the subject disclosure may include, for example, identifying one or more radiating elements of an antenna system that are to be adjusted based on interference determined to affect an operation of the antenna system, and altering one or more properties of the one or more radiating elements to effect polarization adjusting such that an impact of the interference on the antenna system is minimized. Other embodiments are disclosed.

The invention discloses a resource allocation method for LTE (Long Term Evolution) wireless communication, relates to the technical field of wireless communication, and is used for solving the problem that wireless communication resource allocation is not clear. According to the method, the future position of the user is predicted by acquiring the historical position and speed data of the user and combining with the time step length, the channel quality is predicted through the path loss and interference model, the target cell is identified, data is provided for resource allocation, and the resource occupation state of the target cell is evaluated. The resource reservation proportion is dynamically adjusted in combination with user service requirements and channel quality, the communication quality and service continuity of high-speed users in the switching process are guaranteed, then, a shared resource pool is constructed, and low-interference resource blocks are preferentially allocated to high-priority users through an interference coordination strategy in combination with an interference thermodynamic diagram generated in real time, so that the high-priority users are subjected to resource allocation. The interference influence is reduced, the priority and the resource allocation strategy are dynamically adjusted, user migration is triggered in combination with the load balancing index, and global optimization of resource allocation and improvement of network performance are achieved.

The invention discloses a phased array computing terminal real-time beam forming and interference reduction method, which comprises the following steps of: 1, acquiring an observation signal by an observation target, calculating an independent narrow-band beam former for each sub-band channel for a channelized frequency domain baseband signal, and further realizing frequency domain real-time beam forming on all baseband signals at the same time, based on the dynamic change of the propagation environment, the beam forming weight is updated, the beam shape and direction are adjusted, and the maximum signal-to-noise ratio beam forming is realized; and 2, effective interference reduction is realized by adopting spatial filtering in phased array calculation terminal equipment, a spatial filter is constructed in combination with a subspace projection method, identification and elimination of interference signals are realized through calculation and characteristic decomposition of a covariance matrix, and finally filtered signal data are obtained. According to the method, a large number of independent tasks in matrix operation can be efficiently processed, so that the calculation time is remarkably shortened, and the observation capability of a system and the adaptability of an application scene are improved.

Methods and apparatuses for interference reduction and coordination in a wireless communication system. A method for operating a base station includes determining first information for a first serving cell that includes a first interference level from a set of interference levels, a first priority level from a set of priority levels, and a first resource from a set of resources. The first interference level and the first priority level are associated with the first resource. The method further includes transmitting the first information.

An artificial intelligence-based adaptive interference reduction system (100), comprising: a signal acquisition unit (102) configured to acquire and digitize raw signals from an environment via one or more sensors; an interference detection module (104) comprising a processor configured to implement a Convolutional Neural Network (CNN) and Support Vector Machine (SVM) model for identifying and categorizing interference patterns based on frequency, amplitude and spectral properties; an adaptive filter control module (106) configured to implement reinforcement learning-based adaptive filtering by dynamically adjusting the filter parameters based on detected interference conditions; a machine learning module (108) configured to implement a hierarchical deep neural network (DNN) model trained on historical interference patterns to predict and prevent interference in real time; and a feedback control module (110) configured to monitor and evaluate the interference reduction performance and to provide iterative adjustment signals to the adaptive filter control module (106).

The invention provides a beam weight optimization method and device based on a low-altitude scene, electronic equipment and a storage medium. The method comprises the following steps: acquiring measurement report MR data reported by a flight terminal in the low-altitude scene according to a set flight route period; performing coverage simulation on all weights in a preset cell beam weight library to obtain simulation data corresponding to different beam weights in the low-altitude scene; based on the simulation data and the MR data, optimizing a wave beam weight of a network side to obtain an optimized wave beam weight; and dynamically adjusting the beam weight of the base station antenna based on the optimized beam weight. In a low-altitude scene, by simulating the preset beam weight, aiming at low-altitude environment complex interference, the interference source is effectively identified and avoided, the beam weight is optimized, and the influence of the interference on the signal quality is reduced, so that the signal strength is enhanced, the stable connection between the flight terminal and the base station is ensured, the signal quality is improved, and the user experience is improved. And high efficiency and accuracy of data transmission are ensured.

The invention discloses a multi-band spectrum resource allocation method based on A2-MADDPG, and belongs to the technical field of MAB attention mechanisms. According to the technical scheme, a communication system framework is constructed, and a multi-band resource allocation environment is defined; modeling is carried out for frequency band characteristics, and cooperative work is realized; extracting multi-scale features of a system state by adopting self-adaptive multi-scale convolution and a dynamic attention mechanism; the hyper-parameters are optimized through an evolutionary strategy, and optimal resource allocation is achieved; a dynamic reward mechanism is established, weights are adjusted in real time according to actions and environments, and short-term and long-term targets are considered. The beneficial effects are that the method combines multi-agent deep reinforcement learning, adaptive multi-scale convolution, an attention mechanism and an evolutionary strategy to construct a multi-band collaborative resource allocation scheme, and can reduce inter-band loss to improve the spectrum utilization rate; the self-adaptive scale convolution and the dynamic attention mechanism are fused, the self-adaptive capability of the algorithm is improved, the system can keep high performance under different network environments and demand changes, interference is remarkably reduced, and the spectrum utilization rate is improved.

This disclosure provides methods, components, devices and systems for interference reduction between wireless communication devices of overlapping basic service sets (OBSSs). Some aspects more specifically relate to signaling mechanisms associated with an OBSS channel sounding operation and power control mechanisms associated with OBSS interference mitigation, either or both of which a first access point (AP) associated with a first basic service set (BSS) may leverage as part of a coordinated beamforming scheme with a second AP associated with a second BSS. In accordance with OBSS channel sounding, the first AP may associate a set of sounding packets with one or more parameters indicative of the second BSS such that the sounding packets appear, to OBSS stations (STAs), as in-BSS sounding packets. Additionally, or alternatively, the first AP may employ a power control mechanism according to which the first AP may apply portion-by-portion transmission power control.

The present application relates to a synchronization method, a security grating and a device, the method comprising the following steps: the transmitter of the security grating emits two infrared modulated signal lights composed of different verification methods in a polling manner, including a first infrared modulated signal light and the remaining infrared modulated signal lights, the first infrared modulated signal light and the remaining infrared modulated signal lights respectively carry information in different ways; the receiver distinguishes the received infrared modulated signal lights in two corresponding verification methods, and according to the information carried by the corresponding infrared modulated signal lights, the matching and synchronization of all transmitting tubes and receiving tubes in the transmitter and receiver of the security grating are achieved. The present application can reduce the use cost of the security grating, and reduce interference, so that the security grating can work normally.

The invention discloses a PVC film coating uniformity detection method based on spectral analysis, and relates to the technical field of optical detection, and the method comprises the following steps: S001, adopting a controllable incident illumination system with a multi-angle rotation function to carry out continuous angle scanning on the surface of a PVC film, collecting reflection spectrum intensity data in a corresponding wave band range according to different incident angles, and generating a spectrum data matrix containing interference characteristics; and S002, carrying out continuous wavelet transform processing on the spectral data matrix, carrying out multi-scale local decomposition on a spectral response signal, extracting and separating a periodic interference characteristic signal, and obtaining a purified spectral matrix after interference reduction. According to the method, through multi-angle spectrum collection and interference feature stripping, accurate identification of a coating thickness abnormal area and combination of strength indexes, spraying parameters are regulated and controlled, a detection-compensation-reinspection closed-loop mechanism is constructed, interference misjudgment is effectively avoided, and the accuracy and regulation and control efficiency of uniformity detection of the PVC film coating are improved.

This disclosure provides systems, methods, and apparatus, including computer programs encoded on a computer storage medium, for interference reduction techniques between passive wireless devices. In some aspects, a source device, a reader device, or a passive wireless device may support one or more interference avoidance mechanisms, according to which the reader device may experience less interference from other devices within the system, such that the reader device may experience less interference from the other devices within the system. Messages for the reader device may be decoded more accurately based on radio frequency signaling received at an antenna of the reader device, or both. In some implementations, a plurality of passive wireless devices may each add or apply a respective communication signature to a reflected or backscattered signal from the passive wireless device. The respective communication signature may uniquely identify backscatter signaling from a particular passive wireless device such that the reader device may parse the received signaling and extract and decode related messages.

This disclosure provides methods, components, devices and systems for interference reduction between wireless communication devices of overlapping basic service sets (OBSSs). Some aspects more specifically relate to signaling mechanisms associated with an OBSS channel sounding operation and power control mechanisms associated with OBSS interference mitigation, either or both of which a first access point (AP) associated with a first basic service set (BSS) may leverage as part of a coordinated beamforming scheme with a second AP associated with a second BSS. In accordance with OBSS channel sounding, the first AP may associate a set of sounding packets with one or more parameters indicative of the second BSS such that the sounding packets appear, to OBSS stations (STAs), as in-BSS sounding packets. Additionally, or alternatively, the first AP may employ a power control mechanism according to which the first AP may apply portion-by-portion transmission power control.

The invention relates to the technical field of optics, in particular to an optical lens, an optical engine, an imaging module and a 3D camera. The invention aims to improve the signal-to-noise ratio of three-dimensional detection by reducing interference signals. The optical lens provided by the invention comprises a plurality of lenses and an aperture diaphragm which are sequentially and coaxially arranged from the object side to the image side, the absolute value of the difference between the number of lenses, facing the object side, of the aperture diaphragm and the number of lenses, facing the image side, of the aperture diaphragm is smaller than or equal to 2, and the difference between the numbers of the lenses on the two sides of the aperture diaphragm is small so as to reduce distortion. The full-view-field distortion of the optical lens is less than 1%, and the imaging performance and the detection precision are ensured; moreover, the wavefront root-mean-square value is increased to be not less than one wavelength, so that transition pixels are increased, and the detail contrast ratio is reduced, thereby reducing point cloud fluctuation caused by micro-mirror artifacts, laser speckles and the like, and improving the signal-to-noise ratio and detection precision of three-dimensional detection.

The invention discloses an underground data wireless transmission system based on the Internet of Things technology, and relates to the technical field of wireless signal transmission control, and the system carries out the comprehensive monitoring and analysis of different channel performance data of LoRa, Wi-Fi, 5G, Bluetooth and NB-IoT through a channel monitoring module, and facilitates the switching to a qualified channel. In combination with a laser radar technology, an underground environment is scanned, a three-dimensional model is established, underground obstacles and influences of moisture content changes of the underground obstacles on signal propagation are identified, and targeted optimization strategies such as adjustment of signal transmitting power and antenna angles are generated so as to deal with the problems of environment changes and signal attenuation. Further, through underground multipath effect analysis, after a second early warning instruction is received, the system can identify a reflecting surface and a refracting surface in signal propagation in real time, analyze the influence of the multipath effect on the signal and generate an optimization scheme, such as measures of arranging relay equipment, adjusting antenna beams and the like, so that interference is remarkably reduced, and the transmission quality of wireless signals is improved.

The invention discloses an RGB-T salient target detection method based on asymmetric illumination perception progressive decoding. The method comprises the following steps: acquiring an RGB-T salient target detection data set, and inputting the RGB-T salient target detection data set into a trained RGB-T salient target detection network; the method comprises the following steps of: acquiring a multi-level feature by adopting two Swin Transform backbone networks; effective interaction of RGB features and T features is realized in an asymmetric mode by using an asymmetric illumination perception interaction module, and interference information is reduced; through a channel spatial feature fusion module, cross-modal feature fusion is realized in two dimensions of a channel and a space. Decoding the fused features by adopting a staged progressive decoding strategy, and outputting a final saliency map; according to the method, a cross-modal feature interaction and fusion method and a multi-scale information aggregation strategy are explored, and the precision of RGB-T salient target detection is improved.

The invention discloses an intelligent file cabinet file query method based on the RFID technology, and relates to the technical field of intelligent file management.The internal space of a file cabinet is divided into small grid units through virtual grid modeling, each grid has a clear number, preliminary positioning of each RFID tag is achieved, and the file query efficiency is improved. According to the method, the file is not limited to an approximate area any more and is accurate to a specific grid, multi-antenna cooperative reading is combined with multiple reading and analysis of signal intensity and phase angles, the positioning accuracy is further improved, errors can be corrected according to signal differences and phase angles through a maximum likelihood estimation model, more accurate file position query is achieved, and the positioning accuracy is improved. According to the technical scheme, labels in a coverage area are read for multiple times in a multi-antenna cooperative reading mode, interference is reduced through signal calibration between the antennas, and errors caused by signal reflection, interference or overlapping are reduced by carrying out weighted average on signal strength and correcting differences between the antennas through a least square method.

This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for interference reduction techniques between passive wireless devices. In some aspects, a source device, a reader device, or a passive wireless device may support one or more interference avoidance mechanisms according to which the reader device may experience less interference from other devices within a system or may more accurately decode messaging that is meant for the reader device from the radio frequency signaling received at an antenna of the reader device, or both. In some implementations, multiple passive wireless devices may each add or apply a respective communications signature to a reflected or backscattered signal from that passive wireless device. The respective communications signatures may uniquely identify backscattered signaling from a specific passive wireless device such that a reader device may parse through received signaling and extract and decode a relevant message.

The invention relates to the technical field of live broadcast management, in particular to a digital intelligent live broadcast bullet screen supervision method and system. The method comprises the following steps: acquiring live broadcast bullet screen data and real-time live broadcast data; analyzing the live broadcast bullet screen data, and determining an abnormal bullet screen and an abnormal level of the abnormal bullet screen; performing risk assessment on the abnormal bullet screen in combination with the real-time live broadcast data, and determining a dynamic shielding judgment threshold value of the abnormal bullet screen; and comparing the abnormal level with the dynamic shielding judgment threshold, and determining a display strategy of the abnormal bullet screen according to a level comparison result. And in combination with the real-time live broadcast data, risk assessment is performed on the abnormal bullet screen, the dynamic shielding judgment threshold of the abnormal bullet screen is determined, and the high-risk scene recognition accuracy is improved. And comparing the abnormal level with a dynamic shielding judgment threshold, and determining a display strategy of the abnormal bullet screen according to a level comparison result, thereby reducing interference, retaining free expression of the user, reducing the complaint rate of the user, and inhibiting malicious screen refreshing diffusion.

A radar system includes a first transmitter channel and a first receiver channel. In a first mode of operation the radar system determines a first channel response. In a second mode of operation, the radar system modifies a received signal based on the first channel response.

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 discloses a blade detection method and related equipment, and relates to the field of tool detection. A target detection electric signal meeting a preset condition and corresponding to a to-be-detected blade is obtained, signal processing is conducted on the target detection electric signal, a damage factor corresponding to the to-be-detected blade is obtained, and the damage factor is a parameter representing the damage condition of the to-be-detected blade; judging whether the damage factor meets a preset damage condition or not, wherein the preset damage condition is determined according to an electric signal corresponding to the damaged blade; and under the condition that the damage factor meets a preset damage condition, sending a detection result indicating that the to-be-detected blade is damaged to the front end. The damage condition of the to-be-detected blade is detected comprehensively, the influence of interference signals on the detection result is reduced, and the blade detection accuracy is improved.

An electromagnetic tracking (EMT) system is configured for determining a frequency for generating at least a portion of a magnetic field signal using a transmitter coil of a plurality of transmitter coils. The EMT system configures a time-division multiplexed (TDM) control signal configured to cause the transmitter coil to transmit bursts of the magnetic field signal at the frequency. The EMT system configures a filter for filtering the TDM control signal, the filter configured to shape each burst to reduce or eliminate a harmonic artifact of the bursts. The EMT system causes the transmitter coil to generate the shaped bursts of the magnetic field signal. The EMT system receives, from a sensor, a sensor signal that corresponds to the magnetic field signal, the sensor including the output response indicative of the location of the sensor relative to the transmitter.

The invention discloses a time-frequency cooperative multi-sub-pulse adaptive matched filtering main lobe intermittent sampling interference resisting method, which comprises the following steps of: modeling a radar multi-sub-pulse transmitting signal to obtain an echo signal, modeling a radar system total receiving signal, filtering an interference signal, recovering a target signal, and obtaining a pulse pressure result. According to the method, multi-channel pulse compression is completed, then distance gate alignment is carried out, finally, distance and speed information of a real target is further highlighted through intra-sub-pulse coherent accumulation and inter-sub-pulse coherent accumulation, and intermittent sampling interference is effectively suppressed. According to the method, a multi-sub-pulse structure is utilized, the interception length of a single sub-pulse by a jammer can be reduced, so that the interference degree of the single sub-pulse is reduced, and the intermittent sampling interference can be effectively suppressed under the condition that interference prior information does not need to be known.

The invention provides a galvanized steel pipe inner wall defect quality detection device, and relates to the technical field of pipe body inner wall detection, the galvanized steel pipe inner wall defect quality detection device comprises a detection mechanism used for extending into a galvanized steel pipe for detection, and an equipment external connection mechanism used for receiving data sent back by the detection mechanism, the equipment external connection mechanism is mounted at one end of the detection mechanism, and the detection mechanism comprises a connection extension pipe, a probing part and a laser transmitting and receiving device. When the device is used, the connecting extension pipe is arranged to drive the probing part to gradually go deep into the galvanized steel pipe, and meanwhile, all the laser emitting and receiving devices synchronously emit laser to the inner wall of the galvanized steel pipe and receive the reflected laser for distance measurement; the laser transmitting and receiving device transmits received data to the operation platform through the equipment external connection mechanism to generate a spacing curve, whether the inner wall of the galvanized steel pipe has defects or not is judged through fluctuation of the spacing curve, and the effects of reducing interference and improving accuracy are achieved.

A wireless communication network performs multi-static radar operations, including operating multiple access points as geographically-diverse radar transmitters that transmit illumination signals, for illumination of a target region, and an example User Equipment (UE) operates as a radar receiver with respect to the multi-static radar transmission. The network may perform multi-static radar operations on demand, for power savings and interference reduction, and UEs may indicate particular radar-sensing needs or capabilities when requesting multi-static radar operation, for consideration by the network when configuring the corresponding illumination-signal transmissions.

The invention discloses a same-frequency interference adaptive processing method applied to a shipborne navigation radar, and the method comprises the steps: dividing each echo into sub-segments with equal sample lengths, and obtaining the amplitude mean value measurement and the flatness value measurement of each sub-segment; secondly, obtaining the interference number of each echo, the starting point and the ending point of each interference, and obtaining the bottom noise of each echo; thirdly, obtaining statistical characteristics of interference quantity, interference length and interference intensity, and obtaining bottom noise statistical characteristics of echoes in a frequency domain; and finally, calculating a new waveform adjustment parameter according to the analysis of the interference characteristics. Through omnidirectional detection and analysis of time-frequency characteristics and statistical characteristics of same-frequency interference, the shipborne radar adaptively selects waveform parameters to realize active interference avoidance, the influence of interference is reduced, and a guarantee is provided for perception robustness of the shipborne radar under the condition of same-frequency interference.

Systems and methods for reducing interference between content play and video recording among multiple devices located proximate to each other. Microphones of devices recording video are muted, or content play is interrupted, according to the actions of a majority of nearby devices. For example, if most devices are recording video, content play may be interrupted to prevent the video from unintentionally recording unwanted sounds from play of the content. Conversely, if most devices are not recording video, only those devices which are may have their microphones muted. Actions to reduce interference may be taken according to the current behavior of a majority of proximate devices.

A radar system operates in two modes: a calibration mode and a sensing mode. In the calibration mode, the radar system sends a set of test signals via a set of transmitters and receives responsive signals at a corresponding set of receivers. Based on the received signals, the radar system estimates the channel responses. In a sensing mode of operation, the radar system transmits a signal, receives a responsive set of signals at the receivers, and detects characteristics of nearby objects based on the received signals. In the sensing mode, the radar system employs the estimated channel responses to precode the signals for transmission and thereby reduces the components of the received signals that are due to self-interference.

The invention discloses an anti-interference strong-robustness high-precision differential positioning method which is applied to real-time dynamic differential positioning of a Beidou No.3 receiver in a complex electromagnetic environment. Comprising the following steps: step 1, performing gross error combined processing: a, forming an LI combined observation value and an MW combined observation value by using double-difference phase observation values and double-difference pseudo-range observation values on B1 and B3 respectively; according to the method, a staged combined processing strategy is innovatively adopted, in the preprocessing stage, large gross errors are accurately eliminated through a median method (with the formula: XiM formula > k * MAD as the criterion, k = 5), and interference can be reduced from the source; in the parameter calculation stage, robust estimation iteration is only carried out on the residual small gross error, limitation of a single standard is avoided, the calculation amount is greatly reduced, balance of gross error processing effectiveness and real-time performance is achieved, and support is provided for efficient operation of an embedded processor.