71 results about "Residual interference" patented technology

The invention discloses a miniature piezoelectric driving type detection contact integrated laser module and a contact type calibration method, particularly relates to the technical field of precision measurement, is used for solving the problem of dynamic time-varying interference of high-voltage driving pulses on micro-force signals, and is an interference coupling path synchronous acquisition and dynamic resolving technology based on a distributed electromagnetic probe. Online identification of transient interference energy distribution characteristics is realized; a multi-dimensional parameter fusion mechanism of an interference-response dynamic model quantifies cross-domain characteristics of interference energy, system response and signal noise into a comprehensive suppression coefficient, and reverse compensation waveform injection and adaptive filter dynamic adjustment are performed, so that full life cycle offset of common-mode noise is realized, and damage of residual interference to closed-loop control is avoided; through cross-domain collaborative analysis of laser-mechanical data, a self-healing iteration mechanism of contact type calibration parameters is established, progressive pollution of dynamic interference to a calibration reference is eradicated, and long-term consistency of detection precision under complex working conditions is ensured.

The invention discloses a method and a system for suppressing electromagnetic interference in multi-modal fusion touch interaction. The method comprises the following steps of: acquiring signal data, extracting signal features to obtain a first signal data set, and extracting interference source features to obtain interference source feature data; performing spectrum conflict analysis according to the interference source characteristic data to obtain a conflict frequency range; when the conflict frequency range exceeds a preset frequency threshold value, performing dynamic frequency selection and sensor parameter adjustment to obtain a second signal data set, and performing intensity detection to obtain residual interference intensity; when the residual interference intensity is higher than a preset intensity threshold value, carrying out dynamic encryption operation to obtain an encrypted signal flow, and carrying out key dynamic updating and optimization to obtain an anti-interference touch signal flow; and according to the anti-interference touch signal flow, performing interference suppression effect quantification to obtain a final performance evaluation result of electromagnetic interference suppression. The method can realize real-time high-reliability electromagnetic interference suppression in a complex human-computer interaction scene.

The invention discloses a data full-link dynamic anti-interference optimization transmission method. The method comprises the following steps: S1, constructing a data transmission system architecture comprising a sending end, a transmission link and a receiving end; the sending end detects environment disturbance characteristics in real time, and the receiving end collects receiving signals containing background noise and link distortion; s2, designing a self-adaptive waveform coding strategy at a sending end; s3, performing active channel compensation on a transmission link; channel characteristics are extracted, and channel interference is counteracted in real time through pre-distortion waveform adjustment; s4, deploying an intelligent noise reduction decoding algorithm at a receiving end; a depth feature separation network is constructed, and link residual interference is filtered out by analyzing the time-frequency domain difference between a target signal and a noise component. Through a three-level anti-interference mechanism of adaptive coding of the sending end, active compensation of a transmission link and intelligent noise reduction of the receiving end, the problem that the transmission reliability of signals is reduced due to environment disturbance, channel distortion and noise pollution in a complex environment is solved.

The invention relates to the technical field of wireless communication, in particular to a dynamic power distribution method for a power chip, which comprises the following steps of: 1, acquiring dynamic parameters in real time; 2, calculating a power demand weight; 3, dynamically adjusting a power distribution proportion: generating an initial distribution proportion based on the power demand weight, and compensating and correcting the initial proportion through a residual interference predicted value of a previous adjacent time slot; 4, closed-loop control power output: the corrected power distribution proportion is converted into an actual transmitting power value, and the power output precision is ensured through feedback calibration; and 5, time slot switching transition and parameter updating: adjusting a power change rate based on channel coherence time during time slot switching, and updating an interference compensation parameter according to an actual power error. The stability, the power efficiency and the adaptability of a communication system are improved by combining real-time parameters and a refined power calculation and control mechanism.

The invention discloses a frequency spectrum monitoring and interference analysis method for power grid wireless communication, and particularly relates to the technical field of wireless frequency spectrum monitoring. Outputting an eddy current distribution parameter set based on the power frequency magnetic field intensity distribution data of the monitoring point; synchronously acquiring a frequency spectrum signal and a power frequency magnetic flux density signal; calculating high-frequency harmonic frequency point characteristics of secondary radiation generated by the frequency spectrum monitoring equipment in the power frequency magnetic field, and generating an eddy current characteristic spectral line graph; extracting a frequency band energy value matched with the eddy current characteristic spectral line diagram in the frequency spectrum signal, and calculating a pollution proportion of secondary radiation to the frequency spectrum signal in combination with the power frequency magnetic flux density signal; eliminating pollution signal components according to the pollution proportion, and outputting a real spectrum; and performing joint scanning on the real frequency spectrum, extracting modulation characteristics and spatial orientation of the residual interference signal, and generating an interference source positioning report. The problem of real spectrum signal distortion caused by eddy current secondary radiation in a power frequency magnetic field environment is solved, and the accuracy and reliability of spectrum monitoring and interference analysis are improved.

According to the self-shielding type anti-interference current transformer and the dynamic magnetic field compensation method thereof, external interference magnetic field data are detected in real time through the magnetic field sensing layer, a basis is provided for interference shielding of a magnetic field, reverse magnetic field data are set based on the external interference magnetic field data, a main shielding winding generates a reverse magnetic field, the reverse magnetic field and an interference magnetic field are superposed and offset, and the self-shielding type anti-interference current transformer is obtained. Auxiliary magnetic field data are set for further magnetic field shielding through the residual suppression layer based on the offset condition of reverse magnetic field data on external interference magnetic field data, the auxiliary shielding winding further eliminates high-frequency residual interference, finally 0-20 kHz broadband interference suppression is achieved, performance stability can be kept within the temperature range of-40 DEG C to 120 DEG C, three dynamic shielding layers are adopted, and the performance stability is improved. The problem of dynamic interference in a complex electromagnetic environment is solved, and the measurement precision is improved to 0.1%.

The invention relates to the technical field of electronic component parameter optimization, in particular to an electronic component parameter optimization method and system, and the method comprises the following steps: collecting high-frequency measurement data of an electronic component; performing preliminary interference separation on the high-frequency measurement data to identify and suppress continuous waveform distortion caused by impedance mismatching of the transmission line and accidental transient electromagnetic pulses caused by reduction of shielding capability of the transmission line, and obtaining data after preliminary interference separation; performing purity evaluation on the data after the preliminary interference separation to quantify the degree of residual interference in the data after the preliminary interference separation to obtain a purity evaluation result; and dynamically adjusting an optimization strategy and a data weight of an electronic component parameter optimization program according to a purity evaluation result so as to carry out electronic component parameter optimization. The accuracy and efficiency of parameter optimization of the electronic component can be improved.

The invention discloses a cable metal shielding layer fault live detection constant current source, which belongs to the technical field of live line fault diagnosis, and comprises an output end used for injecting adjustable direct current into a live cable; the primary protection module is used for inhibiting interference signals generated by a metal shielding layer of the live cable; the sampling module is used for collecting the output current of the output end after the interference signal is suppressed by the primary protection module; the secondary protection module is used for filtering the residual interference signal of the output current of the output end after the interference signal is suppressed by the primary protection module; the microcontroller unit is used for controlling the starting state of the secondary protection module according to the amplitude of the residual interference signal; the duty ratio adjusting module is used for dynamically adjusting the duty ratio of the pulse width modulation signal according to the output current of the output end; and the DC-DC converter is used for controlling and adjusting the output current of the output end according to the pulse width modulation signal. The constant current source can realize cable metal shielding layer fault live-line detection.

The invention discloses an anti-interference method suitable for a satellite navigation signal, and belongs to the field of satellite navigation signal anti-interference, and the method comprises the steps: collecting multi-channel satellite navigation signal data through a receiver array, processing an initial signal through a self-adaptive filtering algorithm to preliminarily reduce noise interference, and obtaining a preliminarily purified signal; extracting a spatial correlation matrix according to the preliminary purification signal, decomposing the matrix by adopting a principal component analysis algorithm to identify dominant spatial features, and determining an interference direction vector; obtaining the spectrum distribution of the direction suppression signal, further separating the spectrum overlapping part by adopting a principal component analysis algorithm, and judging the residual interference residue; through fusion of the direction suppression signal and the residual interference residue, an adaptive filtering algorithm is adopted to iteratively optimize the weight so as to enhance the navigation signal strength, and an optimized enhanced signal is obtained; and calculating a positioning parameter according to the optimized enhanced signal, judging whether the parameter stability meets a preset threshold value, and obtaining a final stable signal.

The invention provides an intelligent voice control system and a voice enhancement method in a reverberation environment. The method comprises the following steps: acquiring an initial voice signal in the reverberation environment; determining reverberation energy distribution in each frequency band according to the time-frequency spectrogram of the initial voice signal and the frequency response attenuation curve in each frequency band, and determining reverberation suppression gain of the initial voice signal in a time-frequency domain through all reverberation energy distribution; performing reverberation suppression on the initial voice signal according to the reverberation suppression gain to obtain a voice signal after reverberation suppression; performing time-frequency mask estimation on the initial voice signal to obtain a time-frequency mask of the initial voice signal, and determining residual interference energy of each time-frequency unit of the initial voice signal in a time-frequency domain according to the time-frequency mask and an interference covariance matrix of the target sound source; and performing harmonic enhancement on the voice signal after reverberation suppression through all residual interference energy to obtain a voice enhanced signal. By adopting the scheme of the invention, the acoustic crosstalk caused by reverberation can be suppressed.

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 relates to a joint beam forming and power control method in a communication and inductance fusion federated learning system, which comprises the following steps of: constructing a joint optimization problem which takes minimization of residual interference power of a base station receiving end as an optimization target and takes a beam forming vector and a power control factor set as optimization variables; a deep reinforcement learning framework is adopted to solve the joint optimization problem, and an optimal beam forming vector and an optimal power control factor set matched with the current channel state and the sensing task are dynamically output; and sending out a control instruction according to the optimal beam forming vector and the optimal power control factor set so as to perform cooperative control on a beam former of the base station and the transmitting power of each edge device. Beam forming and user power are jointly optimized, and resources are adaptively allocated by using deep reinforcement learning, so that sensing performance and power constraints are ensured, federated learning aggregation errors are remarkably reduced, and multi-device cooperative training efficiency and spectrum utilization rate are improved.

The invention provides an RS-485 bus passive protection device for on-line monitoring equipment of a transformer substation. The RS-485 bus passive protection device comprises a primary protection module, a primary filtering module, a residual voltage release module and a residual interference elimination module which are sequentially connected in series along an RS-485 bus signal path, all the modules are matched in sequence to provide graded protection for the RS-485 bus, the primary protection module is used for discharging high-voltage impact current generated by lightning stroke and surge, the primary filtering module is used for attenuating pulse group interference signals in the bus, the residual voltage release module is used for carrying out secondary clamping on residual high voltage and slowly releasing residual charges, and the secondary filtering module is used for carrying out secondary filtering on the residual high voltage. And the residual interference elimination module is used for filtering residual interference signals so as to ensure normal communication. The problem that high-voltage pulses such as field surges and lightning strokes break down an RS485 interface of online monitoring equipment is solved, meanwhile, interference of interference signals such as pulse groups and conducted disturbance on a bus is effectively solved, and the equipment can safely and reliably work in a complex electromagnetic environment.

The invention discloses an active eliminating type filtering method for cross interference of a charging module and a related device, which are used for improving the electromagnetic compatibility and the stability of a charging system and reducing the influence of the cross interference. The method comprises the following steps: monitoring a charging module output frequency spectrum, and decoupling the frequency spectrum to obtain interference frequency and interference intensity; constructing a digital twinborn model based on the interference frequency and the interference intensity; extracting working state characteristics of the target module, and analyzing by combining the working state characteristics and the expected coupling path to obtain a coupling strength coefficient; according to the digital twin model, generating an expected coupling interference signal generated by the target module; generating an anti-vector signal according to the expected coupling interference signal; injecting the anti-vector signal into a pulse width modulation carrier of the target module to generate an actual driving signal; monitoring a residual interference spectrum output by the target module, and calculating a deviation value between the residual interference spectrum and a preset threshold value; and according to the deviation value, parasitic parameters and anti-vector signals of the digital twin model are updated.

The application discloses a self-interference suppression method based on wideband digital beam forming, which comprises the following steps: S1. After a transmitter performs digital-to-analog conversion on a desired transmission signal through transmission beam forming, the signal is processed through a radio frequency transmitting device and then transmitted to a transmitting antenna array for transmission; S2. A receiver receives the signal from the transmitting end through the receiving antenna array, processes the signal through a radio frequency receiving device, performs analog-to-digital conversion, completes receiving beam forming, and gives a residual interference representation of the receiver; and S3. Coefficients of the transmitting beam forming and the receiving beam forming are designed, the self-interference coupled to the receiving array is suppressed while ensuring normal transmission of the transmitting array and normal reception of the receiving array, and the desired signal is normally demodulated. The application utilizes the symmetry characteristics of the coupled self-interference channel, alternately iteratively optimizes the transmitting and receiving beam forming coefficients, and minimizes the residual interference and noise power coupled to the receiver.

The invention belongs to the field of equipment radio frequency communication, and discloses an AR glasses radio frequency interference suppression method and system, and the method comprises the steps: collecting the characteristic data of a multi-band radio frequency signal; constructing a joint channel model, and solving joint channel model parameters based on the characteristic data; based on the joint channel model, generating an anti-phase counteracting signal, and inputting the anti-phase counteracting signal into a receiving link to perform interference pre-elimination; analog-to-digital conversion sampling is carried out on the signal after interference pre-elimination, and residual interference compensation is carried out through an adaptive filter; and adaptively adjusting the joint channel model parameters according to the change of the received signal, and carrying out real-time interference suppression on the multi-band radio frequency signal. According to the invention, through dual-band concurrent monitoring, nonlinear coupling interference modeling and cooperative suppression of an analog domain and a digital domain, the problems of dynamic characteristics and nonlinearity of cross-band interference are effectively solved.

The present invention discloses an underwater acoustic orthogonal frequency division multiplexing secure communication method. The multiple transmit time reversal pre-filtering at the transmitter focuses the energy of the legitimate channel on the main path, shortening the channel of the cooperating party, while the eavesdropper still exhibits severe multipath characteristics. An orthogonal frequency division multiplexing signal with a short cyclic prefix smaller than the channel delay spread is transmitted, causing severe inter-symbol interference and inter-carrier interference to the eavesdropper. At the legitimate receiver, an interference cancellation-decision feedback equalizer is used to eliminate the residual interference of the cooperating party, improving the quality of the communication link of the cooperating party. Moreover, the secrecy capacity expression of the proposed method is given to evaluate the security performance of the system. The present invention is suitable for the underwater acoustic environment and has good performance in the long-delay frequency-selective underwater acoustic channel. When the location and channel information of the eavesdropper are both unknown, a considerable secrecy rate is obtained without the assistance of artificial noise.

The invention discloses a self-adaptive subspace projection suppression method based on optical pump magnetometer external noise, and belongs to the technical field of neural magnetic imaging (MEG) signal processing.The method comprises the steps that brain magnetic signals are collected through a wearable optical pump magnetometer array and preprocessed, and a signal and noise subspace decomposition model is established; integrating a model-driven noise modeling method and a data-driven noise modeling method, and constructing a noise subspace base vector; constructing a signal subspace basis vector in combination with a guide field matrix and event correlation analysis; identifying residual noise components based on event correlation analysis, and perfecting noise subspace modeling; signal noise separation is realized by adopting a hierarchical projection strategy; and analyzing the time correlation of internal and external space signals, and constructing a time projection matrix to remove residual interference to obtain a clean MEG signal. According to the invention, various types of external noise interferences can be effectively suppressed, the signal-to-noise ratio and the reliability of brain magnetic signals are remarkably improved, and the method is particularly suitable for practical application of a wearable optical pump magnetometer system.

The present invention discloses a spectrum monitoring and interference analysis method for power grid wireless communications, specifically relating to the field of wireless spectrum monitoring technology. The method outputs an eddy current distribution parameter set based on the power frequency magnetic field intensity distribution data of a monitoring point; synchronously collects spectrum signals and power frequency magnetic flux density signals; calculates the high-frequency harmonic frequency characteristics of secondary radiation generated by spectrum monitoring equipment under the power frequency magnetic field, and generates an eddy current characteristic spectrum line diagram; extracts the frequency band energy value matching the eddy current characteristic spectrum line diagram from the spectrum signal, and calculates the contamination ratio of the secondary radiation to the spectrum signal in combination with the power frequency magnetic flux density signal; eliminates the contamination signal component according to the contamination ratio, and outputs a true spectrum; performs a joint scan on the true spectrum, extracts the modulation characteristics and spatial orientation of the residual interference signal, and generates an interference source location report. The method solves the problem of true spectrum signal distortion caused by eddy current secondary radiation under the power frequency magnetic field environment, and improves the accuracy and reliability of spectrum monitoring and interference analysis.

The invention discloses a fractional parameter estimation method of an ISAC system based on OTFS, and belongs to the technical field of wireless communication, and the method comprises the steps: carrying out the time delay-Doppler domain channel estimation of a radar receiving signal, and building the fractional time delay and fractional Doppler initial parameter estimation through dictionary matrix atom correlation; the GDR algorithm is refined through gradient descent, and parameters are iteratively optimized by maximizing the atom correlation function of the correlation dictionary; in iteration, multipath parameters are separated by a path decoupling interference elimination PDIC mechanism, and residual interference is eliminated by a residual error minimization interference elimination RMIC mechanism; after the residual error reaches a convergence condition, outputting a high-precision parameter estimation result; according to the fractional parameter estimation method of the ISAC system based on the OTFS, the problems that a traditional method is difficult to accurately estimate fractional delay and fractional Doppler, the multi-path interference influence is large, and the calculation complexity is high are solved, and high-precision parameter estimation, high anti-interference capacity and efficient resource utilization are achieved.

This invention relates to a method for separating vibration and flow noise in the underwater noise spectrum of a ship propeller, comprising: constructing a "frequency label" for vibration noise by fabricating two propeller models with identical geometry but significantly different material properties; a dual-model difference stage: calculating the absolute difference in the noise spectra of the two models and generating a vibration noise mask based on modal analysis results; a blind source separation stage: for the residual signal after difference, using an improved Independent Component Analysis (ICA) algorithm to further separate residual interference by utilizing the statistical independence of vibration noise; introducing a convolution kernel function in this stage to enhance the algorithm's adaptability to time-delayed signals; and introducing Cepstrum analysis technology to perform phase correction on the complex spectrum of the replacement frequency band. This method solves the significant shortcomings of existing noise control technologies in the coupling separation of vibration and flow noise, enabling the separation of the components of underwater noise from ship propellers, obtaining the noise components caused by blade vibration and the flow noise components separately.

The application discloses a scalable multi-array towed electromagnetic coil structure and a working method, and belongs to the field of towed transient electromagnetic detection equipment. The structure adopts a multi-array modular array design, one transmitting array element and two receiving array elements on the two sides of the transmitting array element form a modular working unit, and the compact connection of the array is realized by the common use of the receiving array elements of adjacent working units. The horizontal offset distance and the vertical distance between the transmitting array element and the receiving array element are constrained, the mutual inductance coefficient in the working unit approaches to zero, the primary field residual interference is suppressed at the physical level, and the shallow detection blind area is eliminated. Time division multiplexing technology is adopted to realize multi-unit round transmission and multi-channel signal synchronous acquisition, a spatial amplitude response matrix is constructed, and the accurate positioning of the center position and the geometric boundary of an underground abnormal body is realized. The application supports horizontal modular seamless expansion, significantly improves the scanning width and the detection efficiency, and can provide rich data basis for high-quality inversion of the underground abnormal body.

Provided is a system capable of reducing a residual interference when forming a null of a directional beam from a relay communication station in an upper airspace which forms a wide-area cell toward an antenna of a terrestrial cell base station. The wide-area cell base station and one or plural terrestrial cell base stations perform service link communications in the same frequency band using radio frames that are time-synchronized with each other. The wide-area cell base station determines a null-forming method according to the conditions of uplink (UL) and downlink (DL) of the service link communications that are performed synchronously in the radio frames of the wide-area cell and the terrestrial cell, and controls a beamforming by the service link antenna of the relay communication station so as to form a null toward within a coverage area of the terrestrial cell base station based on the null-forming method.

Provided is a system capable of reducing a residual interference when forming a null of a directional beam from an upper-airspace relay communication station that forms a wide-area cell, toward an antenna of a terrestrial-cell base station. The wide-area cell base station and the terrestrial-cell base station perform service-link communications in the same frequency band using radio frames that are time-synchronized with each other. The wide-area cell base station determines a null scheduling regarding a null allocation on time axis and frequency axis based on information regarding the terrestrial-cell base station, and transmits information on the null scheduling to the terrestrial-cell base station. Based on the information on the null scheduling received from the wide-area cell base station, the terrestrial-cell base station estimates an interference from the wide-area cell to a terminal apparatus of user located in its own cell, determines a user scheduling regarding an allocation of a terminal apparatus of user on time axis and frequency axis, and performs a communication with the terminal apparatus of user located in its own cell.

The invention relates to the field of wireless communication systems, and provides an RIS-NOMA resource allocation method based on deep reinforcement learning, which comprises the following steps: acquiring base station position information, RIS position information, position information of each user, base station total power, SIC residual interference coefficient and user QoS conditions as states; a distributed optimization strategy is adopted, and RIS element phases in all states and power and non-circular coefficients of signals transmitted to all users by the base station are output by utilizing an RIS phase network, a power distribution network at the base station and a non-circular coefficient distribution network; feedback is constructed according to the minimum transmission rate in the QoS conditions of the users and the sum of the secrecy rates of all legal users of the system, and the RIS phase network, the power distribution network and the non-circular coefficient distribution network are jointly optimized, so that the secrecy rate of the system is effectively improved under the limiting conditions of different transmission powers and the minimum transmission rate, and the reliability of the system is improved. And the eavesdropping risk of the user is reduced.

The invention relates to the technical field of vehicle-mounted electronics, in particular to a vehicle-mounted video interference suppression method and system based on EMC optimization, and the method comprises the steps: building a transmission reference model; comparing the model with a composite signal on a transmission link in real time, extracting a holographic electromagnetic wave interference component through holographic differential processing, analyzing an amplitude-phase transfer function, and generating a reverse holographic electromagnetic wave through phase conjugate inversion; reverse holographic electromagnetic waves are coupled and injected into a link through a distributed holographic modulation array, and coherent cancellation is carried out on the reverse holographic electromagnetic waves and original interference; residual interference is monitored at the downstream of the link, and the offset effect is dynamically optimized through an adaptive weight updating algorithm. According to the invention, channel noise in a transmission link is eliminated from the source through active cancellation, the technical problem that a video signal is submerged by noise before reaching a receiving end in a strong electromagnetic interference environment is solved, and the suppression effect under complex and changeable working conditions is ensured through a self-adaptive closed-loop system. And the transmission reliability and fidelity of the vehicle-mounted video signal are obviously improved.

The application discloses a power distribution method of a downlink non-orthogonal multiple access system based on a non-circular signal and belongs to the technical field of wireless communication systems. According to the characteristic that a non-circular signal can change the second-order statistics of a sending signal, the non-circular signal is applied to a two-user downlink non-orthogonal multiple access system, and a joint design scheme of a non-circular coefficient and power of a strong channel user is provided. The method implementation steps comprise the following steps: according to the distance between a user and a base station, determining the average channel noise ratio intensity of each user, and the residual interference intensity of an imperfect serial interference canceller adopted by a strong channel user; specifying the sending signal power of a weak channel user, the maximum sending signal power of the strong channel user, the target rate of each user and the maximum outage probability threshold of the weak channel user; and calculating the optimal signal sending parameter of the strong channel user according to a formula. The scheme is helpful to improve the transmission reliability of the strong channel user on the premise of ensuring the transmission reliability of the weak channel user.

The invention discloses an anti-interference visible light communication system based on dynamic spectrum hopping, and relates to the technical field of visible light communication. The system comprises a transmitting end, a receiving end and a feedback link, the transmitting end collects interference data through a multi-dimensional spectrum sensing module, after analysis, a reinforcement learning module dynamically generates a spectrum hopping sequence based on Q learning, and signals are transmitted through an LED array in combination with OFDM modulation and synchronous pilot frequency carrying Hash verification information; and a receiving end realizes stable synchronization by adopting dual mechanisms of pilot coarse synchronization and Hash check fine synchronization, detects residual interference while demodulating, and feeds back the residual interference to a transmitting end to form closed-loop adaptive optimization. The invention solves the problems of poor flexibility, unstable synchronization and lagging interference detection of the existing fixed frequency hopping, significantly improves the communication reliability and spectrum efficiency in a complex interference environment, supports high-speed transmission, has strong compatibility, and is suitable for multiple scenes.

The invention belongs to the technical field of electronic information, particularly relates to a lightweight neural network-assisted EMI filtering system, and aims to solve the problems of poor adaptability, high response delay and large resource consumption of a traditional filtering technology in a complex electromagnetic environment. The system collects multi-channel electromagnetic signals through a front-end sensing array, the signals are preprocessed and then input into a lightweight feature extraction neural network, interference features are extracted in combination with depth separable convolution and a time attention mechanism, dominant interference types are judged through an interference mode recognition engine, and the interference mode recognition engine is used for recognizing the interference types. And the dynamic filtering configuration controller is driven to call the optimal parameter to reconstruct the transfer function of the reconfigurable analog filtering array, and the closed-loop evaluation unit feeds back the residual interference level in real time to iteratively optimize the filtering performance. According to the scheme, accurate suppression of broadband and high-dynamic interference is achieved, quick response and low-power-consumption dual-mode operation is supported, and electromagnetic compatibility and system energy efficiency are remarkably improved.

This application discloses an active filtering method and related apparatus for eliminating cross-interference in charging modules, which improves the electromagnetic compatibility and stability of charging systems and reduces the impact of cross-interference. The application includes: monitoring the output spectrum of the charging module and decoupling the spectrum to obtain the interference frequency and intensity; constructing a digital twin model based on the interference frequency and intensity; extracting the operating state characteristics of the target module and combining these characteristics with the expected coupling path analysis to obtain the coupling strength coefficient; generating the expected coupling interference signal generated by the target module according to the digital twin model; generating an anti-vector signal based on the expected coupling interference signal; injecting the anti-vector signal into the pulse width modulation carrier of the target module to generate the actual driving signal; monitoring the residual interference spectrum output by the target module and calculating the deviation between the residual interference spectrum and a preset threshold; and updating the parasitic parameters of the digital twin model and the anti-vector signal based on the deviation.