300 results about "Signal gain" patented technology

The invention relates to an unmanned aerial vehicle emergency communication spectrum scheduling method and system based on dynamic entropy optimization, and the method comprises the steps: 1, constructing an emergency communication system, and calculating the gain of a received signal; 2, constructing a spectrum sensing and user access model; step 3, evaluating the channel quality in the emergency communication system; 4, establishing a state, an action and a reward of deep reinforcement learning according to spectrum sensing, a user access model and channel quality evaluation; 5, constructing a deep reinforcement learning model, and performing training to obtain a trained deep reinforcement learning model; and step 6, obtaining an optimal strategy of unmanned aerial vehicle emergency communication spectrum scheduling in a spectrum environment by using the trained deep reinforcement learning model, and realizing multi-user aggregation spectrum access. According to the invention, through intelligent distributed spectrum management, the problems of limited spectrum resources and energy, multi-user dynamic competition and the like in a disaster rescue scene are solved, and the spectrum utilization efficiency and the communication reliability are remarkably improved.

The invention provides a transformer substation switch cabinet partial discharge detection method and system based on a sensor, and relates to the technical field of discharge detection, and the method comprises the steps: deploying an ultrasonic sensor according to a sensing collection channel, accessing a signal processing terminal, and configuring a sensor sensitivity threshold value and a signal sampling frequency; adjusting the signal gain of each monitoring node coordinate corresponding to the sensing acquisition channel, synchronously recording the monitoring time, the monitoring node coordinates and cabinet body temperature parameters, and setting a monitoring association control matrix in combination with a sensor sensitivity threshold and a signal sampling frequency; determining a partial discharge type and discharge intensity based on the signal processing terminal; and generating a discharge characteristic distribution map, and generating a partial discharge detection report in combination with the insulation performance index of the substation switch cabinet, a safe discharge threshold and a pulse frequency threshold. The technical problems that in the prior art, a transformer substation switch cabinet partial discharge detection method is poor in anti-interference capacity and low in recognition precision are solved.

The invention relates to the technical field of signal processing, and provides an intelligent sensing device electromagnetic interference suppression method and system based on AI identification, and the method comprises the steps: obtaining a multi-source electromagnetic signal set of a target intelligent sensing device in a preset monitoring period, and carrying out the electromagnetic interference feature extraction processing of the multi-source electromagnetic signal set, performing interference mode matching processing on the electromagnetic interference characteristic set based on a preset interference suppression model to generate an electromagnetic interference suppression strategy of the intelligent sensing equipment; the electromagnetic interference suppression strategy comprises a frequency band adjustment direction corresponding to an interference frequency band distribution characteristic, a signal gain compensation direction corresponding to an interference intensity fluctuation characteristic and an anti-interference filtering direction corresponding to an interference source correlation characteristic; and performing interference suppression operation on a signal acquisition module of the intelligent sensing equipment according to the electromagnetic interference suppression strategy so as to reduce the electromagnetic signal distortion rate of the intelligent sensing equipment.

The invention belongs to the technical field of metal crack detection, and discloses a metal microcrack ultrasonic detection method, which comprises the following modules: an ultrahigh frequency composite array probe with a center frequency dynamic adjustable range of 5-50 MHz; the dual-mode excitation and receiving module is used for independently generating a pulse reflection mode excitation signal and a diffraction mode chirp frequency modulation signal; the phase-controlled synthetic aperture dynamic focusing module is used for realizing + / -60-degree deflection and sub-wavelength level focusing of acoustic beams; the nonlinear harmonic enhancement module is used for exciting a crack nonlinear effect by superposing 1-2MHz fundamental waves; and a time-space-frequency three-domain data fusion module. According to the method, signal-to-noise ratio collapse caused by the diffraction effect in a traditional method is overcome, more importantly, the system has low-frequency penetrability and high-frequency resolution at the same time due to 80%-120% of broadband coverage of chirp frequency modulation signals, the diffraction signal gain is increased by 20 dB or above, a near-surface blind area is compressed to be within 0.2 mm, and the system can be applied to the field of radar imaging. And the core pain point of missing detection of the near-surface microcracks of the thin-wall component is solved.

Provided in the present disclosure are a patch antenna, an antenna array and a communication device. The patch antenna comprises: a feed circuit, a slotted ground plane, and a first patch layer, a second patch layer and a third patch layer, which are sequentially stacked in the direction of the slotted ground plane facing away from the feed circuit and are spaced apart from each other, wherein the feed circuit comprises two feed ports and an open-loop annular feed portion connecting the two feed ports; the slotted ground plane is located on one side of the feed circuit; the slotted ground plane is provided with a plurality of slots; the slotted ground plane is spaced apart from the feed circuit; the orthographic projections of the slots on the feed circuit at least partially overlap the open-loop annular feed portion; and the first patch layer comprises a first patch, the second patch layer comprises a second patch, and the third patch layer comprises a first annular patch. The simplification of the structure of a polarization switchable antenna, the reduction of the return loss and the increase of the signal gain and impedance bandwidth are facilitated.

The present disclosure provides an image sensor and a high dynamic range adaptive imaging method wherein the image sensor comprises: a pixel array comprising a photodiode acquisition circuit arranged in an array and photogenerating an image charge signal in response to incident light, the photodiode acquisition circuit comprising a dual conversion gain transistor and a row selection transistor; the pre-reading module is used for receiving initial sampling of the pixel photoelectric response signal before the reading stage and comparing the initial sampling with a threshold signal to generate a control signal; the reading module is used for driving the photodiode acquisition circuit according to the control signal and only reading the pixel electric signal under the selected path for output; and the synthesis module is used for generating a path label corresponding to the pixel electric signal and synthesizing a picture. According to the invention, the method can achieve the quick pre-reading judgment before the reading stage, thereby determining the optimal signal gain mode for output, effectively improving the frame rate, reducing the power consumption, and achieving the optimization of a dynamic range.

An integrated circuit (IC), comprising: a first gain stage configured to apply a first gain to a first signal to generate a first amplified signal; a first converter configured to convert the first signal to a first output signal; a first output pin for outputting the first output signal; gain update circuitry configured to: output a first internal gain control signal to the first gain stage to update the first gain of the first gain stage, subsequently output a first external gain control signal to a second output pin of the IC, wherein output of the first external gain control signal is delayed relative to output of the first internal gain control signal by a first predetermined delay, the first predetermined delay to compensate for signal chain delay between the first gain stage and the first output pin.

A hybrid multiport array antenna comprises a plurality of columns of hybrid dipole unit cells, each of the hybrid dipole unit cells having a first dipole of a first type, and a second dipole of a second type, wherein the first dipole of the first type and the second dipole of the second type are configured to receive a single pair of RF (radio frequency) signals, the pair of RF signals having two orthogonal polarization states, wherein the first dipole of the first type and the second dipole of the second type are spaced with an offset in a vertical direction. The arrangement of the hybrid dipole unit cells reduces the phase center distance between the dipoles in each column and between columns, thereby assuring high gain while reducing grating lobes and other signal gain degradations caused by longer distances between phase centers.

Systems and techniques are described for wireless communications. For example, a network device can receive, via receive antennas, signals transmitted from one or more devices. Each receive antenna is within one group of two or more groups. The network device can adjust, using gain control modules, a power level of each signal to produce power adjusted signals. The gain control modules are within one group of the two or more groups. At least a portion of the gain control modules is associated with different gain states. The gain states are based on at least one of distances of the one or more devices from the network device or power levels of the signals transmitted from the one or more devices. The network device can process the power adjusted signals.

The invention discloses a method for realizing intelligent gain adjustment of a 4G signal and a 5G signal of a wireless repeater, relates to the technical field of wireless network equipment, and solves the technical problems that the gain cannot be dynamically and intelligently optimized according to an actual signal environment, and the network coverage effect and the user experience are influenced. Based on base station configuration and link environment parameters, reasonable gains are accurately calculated, so that gain adjustment better meets actual signal requirements, weak coverage and complex scenes are distinguished, differentiated step lengths are set, different scene signal characteristics are adapted, gain adjustment effectiveness is improved, a'adjustment-monitoring-analysis-iteration 'complete closed loop is constructed, and signal quality is monitored after adjustment. In case of abnormality, a comprehensive analysis signal is generated and optimized and adjusted again, and through mechanisms such as mean value comparison and step length adaptation, the optimal gain adjustment effect is ensured, the network is prevented from being influenced by abnormal adjustment, and the adaptability of the repeater to a complex environment and the network coverage stability are improved.

The invention provides a signal gain self-adaptive control method based on dynamic feedback, which relates to the technical field of self-adaptive control, and comprises the following steps: carrying out initial gain control on an input signal to obtain a system output signal; the feedback quantity of the system output signal is collected, and the filtered actual output signal is obtained through filtering processing; based on the expected output signal and the actual output signal, calculating multi-order errors, including an amplitude error, a first-order derivative error and a second-order derivative error; calculating a collaborative weighting function according to the multi-order error; constructing a comprehensive error cost function based on the multi-order error and the collaborative weighting function; according to gradient information of the comprehensive error cost function and a product term of a second derivative error and a collaborative weighting function, updating a gain parameter by adopting a dynamic step length; and performing gain control on the input signal by using the updated gain parameter to obtain a new system output signal. According to the invention, dynamic self-adaptive adjustment of signal gain parameters can be realized, so that the response capability of the system to rapid dynamic change is improved.

The invention provides an optical gain and electro-optical modulation integrated device and a preparation method thereof, and relates to the field of photoelectron, the optical gain and electro-optical modulation integrated device comprises a chip platform, and an electro-optical modulator and a gain waveguide which are integrated on the chip platform, and the chip platform is doped with rare earth ions in a region corresponding to the gain waveguide; the electro-optical modulator is used for modulating an input optical signal to obtain a modulated optical signal; and the gain waveguide is used for amplifying the modulated optical signal under the action of the pump light and the rare earth ions to obtain a target optical signal. The electro-optical modulator and the gain waveguide are integrated on the chip platform, cooperative work between the electro-optical modulator and the gain waveguide is achieved through rare earth ions, integrated design is achieved, the defects of discrete devices are overcome, and the design target of an on-chip photonic system can be met.

The invention provides an electric power meter data real-time analysis and abnormity early warning method based on edge calculation, and belongs to the technical field of data analysis and early warning, and the method comprises the steps: collecting the multi-modal data of an electric power meter based on a multi-channel analog-to-digital converter, employing a hardware filter circuit to eliminate high-frequency noise, and obtaining the data of the electric power meter; signal gain self-adaptive adjustment is carried out based on a reconfigurable amplifier; a digital signal processing accelerator is used to carry out Fourier transform on a matrix constructed by the standardized data stream, and a multi-core processor is combined to carry out analysis to generate a feature vector; the method comprises the following steps: acquiring environmental parameters in real time based on an environmental sensor, dynamically adjusting an anomaly detection threshold in combination with a machine learning model trained by historical data, and comparing a feature vector with the dynamic threshold to generate an anomaly signal; the relay control circuit triggers sound-light alarm, the physically isolated communication module sends an early warning instruction to the cloud platform, and meanwhile, the redundant power supply module is started to control the electric power meter to operate continuously. And the efficiency and accuracy of subsequent abnormity early warning are improved.

The invention relates to the field of aeronautical material detection, and discloses an aeronautical material detection method and system.The method comprises the steps that an ultrasonic detection signal is obtained, and frequency characteristic analysis is conducted on the ultrasonic detection signal to obtain a frequency spectrum; based on the frequency spectrum, the system can judge the source information of the ultrasonic detection signals, so that the ultrasonic detection signals with background tendency and the ultrasonic detection signals with defect tendency are distinguished; aiming at signals from different sources, the invention innovatively adopts a differential gain processing strategy: low gain is applied to the signals with background tendency to effectively inhibit the intensity of the signals; high gain is applied to signals with defect tendency so as to ensure that even weak real defect signals can be fully amplified and identified; performing defect judgment on the ultrasonic detection signal subjected to gain processing; the problems that misjudgment is introduced by the signal gain compensation module due to probe sensitivity attenuation and normal background signals and real defect signals are difficult to distinguish can be effectively solved.

The invention provides a noise suppression and gain control method for a high-frequency signal, and relates to the technical field of adaptive control, and the method comprises the steps: collecting a high-frequency target signal and an environment reference signal through a dual-path parallel input channel; performing filtering processing on the high-frequency target signal by using an adaptive band-pass filter; carrying out weighted correlation detection on the filtered high-frequency target signal and the environment reference signal, calculating a correlation degree through a dynamically updated weight coefficient, and identifying effective signal components; performing gain control on the signal by adopting a Newton iteration method based on a second derivative, wherein the gain control comprises two stages of step-by-step coarse tuning and continuous fine tuning; signal-to-noise ratio monitoring is carried out at the output stage, and a monitoring result is fed back to the adaptive band-pass filter and the gain control link, so that bidirectional coupling closed-loop control is formed. According to the invention, the high peak noise in the high-frequency signal can be effectively suppressed, and the signal gain is kept in a proper range.

A DCS controller configured to control a digitally controllable scatterer, DCS, to simultaneously serve a subset of multiple receivers, where the DCS includes a plurality of scattering elements arranged on a scattering surface. The DCS controller is configured to determine a single-user codeword for each of the multiple receivers, where the single-user codeword defines a set of scattering elements of the scattering surface of the DCS for the respective receiver and a respective phase shift configuration for each scattering element in the set of scattering elements. The DCS controller is configured to determine a required signal gain for each of the multiple receivers and determine a subset of receivers based on the required signal gains. The DCS controller is configured to determine a subset of scattering elements of the scattering surface for each receiver in the subset of receivers and determine a multiple-user codeword based on the subsets.

A receiver system has at least one antenna that receives a plurality of signals, including a desired signal, across a wide band of frequencies. At least one tunable filter is in signal communication with the at least one antenna, and filters the plurality of signals to produce a plurality of filtered signals. Gain control circuitry is in signal communication with the at least one tunable filter, and produces a gain adjusted version of the filtered signals. A processing unit processes received signals in a portion of the wide band to extract signal characteristics of at least one undesired signal in the portion of the wide band. The at least one tunable filter is tuned based at least in part on the signal characteristics of the at least one undesired signal to maintain the SNR of the desired signal above a threshold level at the output of the gain control circuitry.

The invention relates to the technical field of electric energy distribution and signal energy distribution control, and discloses a product quality detection method based on machine vision, which comprises the following steps: acquiring signal energy distribution data representing product surface energy density, and mapping the signal energy distribution data to a complex frequency domain space to analyze a multi-scale phase component; constructing a local structure tensor by using a phase gradient, determining a background texture direction consistency index, establishing a phase feedback compensation mechanism, and adjusting a phase consistency weighting coefficient; according to the method, the problem of phase dispersion caused by non-uniform reflection is solved, the energy signal-to-noise ratio of the weak features is improved by dynamically adjusting the gain loop and energy distribution, and the signal-to-noise ratio of the weak features is improved. And precise quality identification under a high-reflection working condition is realized.

The invention relates to the technical field of positioning and tracking, and discloses a Beidou GPS fusion-based power distribution cabinet positioning and tracking method and system, and the method comprises the steps: carrying out the radio frequency front-end separation of a Beidou frequency band signal and a GPS frequency band signal received by an antenna in a mobile aviation power distribution cabinet, and obtaining a Beidou baseband digital signal and a GPS baseband digital signal; performing shielding attenuation analysis and signal gain compensation on the metal shell of the power distribution cabinet to obtain a signal after Beidou compensation and a signal after GPS compensation; performing geometric dilution precision calculation and power distribution cabinet attitude coupling analysis to obtain a Beidou system fusion weight and a GPS system fusion weight; and performing double-constellation weighted fusion and least square positioning solution on the signal after Beidou compensation and the signal after GPS compensation to obtain a real-time position coordinate, thereby solving the problem that the load state influence is neglected in the prior art, and improving the cooperative positioning precision of a double-constellation system.

The embodiment of the invention provides a solid-state key function implementation circuit and a terminal. The solid-state key function realization circuit comprises a touch panel, a power supply module, a signal gain module, a signal judgment module and an execution module, a first sensing assembly is arranged on the touch panel; the power supply module continuously supplies power to the touch panel, the signal gain module, the signal judgment module and the execution module in various states of the terminal; the first sensing assembly detects a first control operation and generates a first control signal; the signal gain module amplifies the first control signal to generate a gain signal; the signal judgment module compares the gain signal with a threshold signal to generate a comparison result signal; and the execution module maintains or modifies the current terminal state according to the comparison result signal. The scheme does not depend on a mechanical key, various defects of the mechanical key are avoided, various terminal state operations such as startup in a shutdown state and shutdown or restart in a crash state through a solid-state key are realized, and the user experience is improved.

The invention discloses a signal acquisition system and acquisition method for pressure sensors, the signal acquisition system comprises an excitation signal generation module, a first gating module, a second gating module, a gain adjustment module and a control module, the second gating module is matched with the first gating module, so that a plurality of pressure sensors respectively output first response signals; the gain adjusting module adjusts the multiple of the first response signal and outputs a second response signal; the control module receives the second response signal, controls the excitation signal generation module to adjust the excitation signal according to the second response signal, and controls the gain adjustment module to adjust the multiple so as to adjust the second response signal; according to the technical scheme, the excitation intensity and the amplification factor are dynamically adjusted according to the response signal collected each time, and the problem that in the prior art, signal collection is too weak or saturated due to the fact that the resistance change range of a pressure sensor is large is solved.

The invention provides a current measuring circuit and method for a photoelectric conversion device, and the circuit comprises a trans-impedance amplifier which is used for amplifying a current signal of the device and converting the current signal into a voltage signal; the high-pass filtering circuit is used for performing high-pass filtering on the voltage signal; the filter matrix comprises an all-pass filter and a low-pass filter; the first programmed switch is used for selectively outputting an output signal of one of the filter matrixes; the voltage follower is used for following an output signal of the first programmed switch; the subtractor with adjustable gain is used for acquiring the difference between the output signals of the voltage follower and the high-pass filter; the second programmed switch is used for selectively outputting an output signal of one of the high-pass filter, the subtracter and the voltage follower; the ADC module is used for collecting an output signal of the second programmed switch; and the main controller is used for controlling the programmed switch and acquiring a target current measurement value according to an output signal of the ADC module. According to the invention, functions of gain adjustability, bandwidth adjustability and calibration correction can be considered.

The invention discloses a signal enhancement super-permeable membrane for multi-system and multi-band wireless communication and a preparation method thereof. Relates to the technical field of electromagnetic regulation. The signal enhancement ultra-permeable membrane is composed of a large number of equilateral metal pattern units, a PET film layer and an electric smelting quartz glass dielectric layer. Each metal pattern unit is of an axially symmetric I-shaped metal structure with adjustable length and rotation angle; the transmission phase and amplitude modulation of incident electromagnetic waves can be realized by adjusting the length of the metal wire, the radian of the metal ring and the rotation angle. Full-wave simulation shows that the metal units with different sizes are orderly arranged on the PET film and are deployed on the two sides of the electric smelting quartz glass, so that macroscopic regulation and control of incident electromagnetic waves with different frequency bands can be realized respectively, and the signal gain peak value exceeds 30dB; signal enhancement of multi-band wireless communication can be realized by adjusting structural parameters of the unit structure.

This provides a configuration that allows the UE to perform DMRS bundling in PUCCH repetitions in response to an instruction from the base station. The UE receives an instruction from the base station to perform the configuration of bundling DMRS in repetitions of uplink control channel transmissions. The UE determines the DMRS bundling window based on the configuration. The UE transmits the bundled DMRS within the DMRS bundling window. The base station processes the bundled DMRS. Improved link quality and signal gain between the UE and the base station can be achieved by applying DMRS bundling accordingly through multiple repetitions of PUCCH transmissions.

The invention discloses an ultrasonic shock wave signal gain optimization method based on a time reversal mirror. The method comprises the following steps: S1, acquiring transmission characteristics of a channel; s2, performing system modeling of the virtual time reversal mirror based on the transmission characteristics; and S3, carrying out optimization processing on the TRM excitation signal. The ultrasonic shock wave amplitude is remarkably enhanced, the cracking capacity of the ultrasonic shock wave on high-hardness calcified plaques is improved, the ultrasonic shock wave enhancement device is suitable for shock wave enhancement application scenes in various acoustic systems, and the success rate and reliability of percutaneous coronary intervention therapy are improved.

The invention provides a linear beam span sensitivity homogenization calibration method and device based on an optical attenuation model, and relates to the field of linear beam detector calibration. The method comprises the following steps: constructing an optical attenuation model based on historical data, and obtaining a calibration range corresponding table between an installation distance and an optimal calibration range; acquiring a maximum infrared signal intensity value which has the maximum system gain and is within a preset signal margin; querying an optimal calibration range corresponding to the maximum infrared signal intensity value Vmax through a calibration range corresponding table, and calculating a distance judgment reference value based on the optimal calibration range; the automatic judging device is operated to obtain the installation distance, and the optimal calibration range is determined and recorded as the target calibration range; synchronously adjusting the current gain of the transmitting end and the signal gain of the receiving end; and carrying out consistency verification on the infrared signal intensity value, and if the verification is passed, automatically setting an alarm threshold value by adopting a relative attenuation model. The technical problems of different alarm sensitivity and poor calibration consistency under different installation distances are solved.

The present invention provides a method and system for automatically calibrating the analog front-end gain of a very low frequency detection system. The method comprises: generating a calibration signal sequence based on the total calibration time limit of the analog front-end circuit and the frequency sweep signal period; performing data acquisition on the calibration signal sequence to obtain sampled data; performing signal analysis on the sampled data to obtain the circuit gain of each frequency sweep point, and determining a curve of the gain of each frequency sweep signal varying with frequency; and performing linear interpolation based on the circuit gain of each frequency sweep point to obtain a gain variation curve corresponding to the analog front-end circuit. Through the present invention, the actual circuit gain of the detection system at each frequency point is accurately obtained, thereby significantly improving the accuracy of restoring the true strength of the received signal and solving the problem of insufficient accuracy in the prior art.

A vehicle antenna device installed on a vehicle and an operating method thereof. The vehicle antenna device includes a printed circuit board; a plurality of antennas disposed on the printed circuit board and arranged to have 360° coverage, a plurality of phase shifters electrically connected to the plurality of antennas in a one-to-one correspondence and each configured to control a phase of a wireless signal transmitted through a corresponding antenna, memory, comprising one or more storage media, storing instructions, and one or more processors communicatively coupled to the plurality of phase shifters and the memory, wherein the instructions, when executed by the one or more processors individually or collectively, cause the vehicle antenna device to transmit wireless signals of a same phase through at least two antennas among the plurality of antennas based on signal gains of wireless signals received through the plurality of antennas.

The present application relates to the technical field of microwave sensor, in particular to a wearable multi-modal flexible microwave sensor.The present application obtains a deformation state value by analyzing deformation data, analyzes stress data to obtain a stress state value, further analyzes element connection state information, then performs corresponding adaptive adjustment according to the element connection state, obtains an adaptive adjustment result, can monitor and analyze the connection of each internal element to obtain the corresponding connection state, can facilitate the user to find abnormalities in time and increase controllability; also, the signal state is obtained by identifying the signal comprehensive parameter, the corresponding signal gain control instruction is generated, the signal gain is executed according to the signal gain control instruction, the corresponding signal abnormal information is generated according to the gain execution, the result of the signal gain is judged, the connection state is confirmed again, and the accuracy of monitoring element connection abnormality is increased.

The invention provides an MA joint beam forming optimization method for a low-orbit satellite communication ground station, belongs to the technical field of satellite communication physical layers, and aims to solve the problems that in MA architecture related algorithms, antenna space layout and beam forming strategies cannot be effectively coordinated, but are limited by power consumption, size and mechanical structure constraints of a satellite-borne platform, the implementation difficulty is large, and the cost is high. The method comprises the following steps: establishing a three-dimensional geocentric spherical coordinate system and a three-dimensional geocentric Cartesian coordinate system; establishing a ground station center Cartesian coordinate system; acquiring an average reachable rate, a signal to interference plus noise ratio of a ground station and interference signal gains of other satellites; constructing an optimization problem P1 by taking the antenna position, the antenna spacing and the signal to interference plus noise ratio of the ground station and the interference signal gains of other satellites as constraint conditions; introducing an auxiliary variable, and converting the optimization problem P1 into a quadratic constraint problem p2; and decomposing the secondary constraint problem p2 into a sub-problem P3 to optimize AWV and a sub-problem P4 to optimize APV, and carrying out iterative solution.