87 results about "Channel filter" patented technology

The invention discloses a self-adaptive filtering method and system for an intelligent electric energy meter, and relates to the technical field of power grid signal processing, and the method comprises the steps: obtaining a power grid voltage and current signal set collected by a target intelligent electric energy meter historically, and obtaining a signal noise spectrum data set and a noise level evaluation result through spectrum analysis and noise level evaluation; if the result exceeds a preset noise threshold value, identifying an interference type and building a noise adaptive filtering multi-channel, integrating and deploying the noise adaptive filtering multi-channel into a target intelligent electric meter to complete signal filtering test and effect evaluation, and dynamically optimizing and generating an electric energy meter adaptive filtering multi-channel based on the obtained multi-channel filtering effect index parameter; and finally, signal filtering closed-loop control is realized. The technical problem that a traditional electric energy meter is weak in filtering pertinence and cannot adapt to dynamic noise of a power grid in electric power related scenes with complex dynamic interference is solved, and the technical effects that the electric variable measurement accuracy of the electric energy meter is improved, and the adaptive capacity of the electric energy meter to different interference scenes is enhanced are achieved.

The invention provides a Q / V frequency band large-scale satellite communication load channel optimization method, which comprises a forward input link and a backward output link, and is characterized in that the forward input link comprises a V frequency band multi-beam antenna feed source array, a plurality of input preselectors, a V frequency band low noise amplifier input switch ring and a V / Ka integrated receiver assembly which are connected in sequence; the output end of the V-band multi-beam antenna feed source array is connected with the input end of the V / Ka integrated receiver assembly through a waveguide. The reverse output link comprises a Ka / Q frequency converter, a Q-band channel filter, a Q-band traveling wave tube amplifier, a change-over switch, a Q-band output duplexer or filter and a Q-band feed beam which are connected in sequence, and the output end of the Ka / Q frequency converter is connected to the input end of the Q-band channel filter through a waveguide; and the output end of the Q-band channel filter is directly connected to the input end of the Q-band traveling wave tube amplifier through the waveguide. Therefore, the method is low in link loss, high in space utilization rate and high in feasibility.

The invention discloses an AI-based historical defective fresco digital restoration system, and relates to the technical field of AI restoration, a two-channel filter and a U-Net network are adopted to extract a fresco damage boundary, and edge detection is enhanced in combination with manual labeling; calculating a multi-scale Hurst index, and constructing a matrix quantization fractal feature change rule; dynamically generating a probabilistic grammar rule set based on the fractal incidence matrix, and defining a state transition probability function of texture growth; recursively executing texture generation driven by grammar rules from boundary points, and introducing random disturbance attenuating along with depth to simulate a stroke natural form; textures are generated through Laplacian pyramid layered correction, and the phase of a reference image is aligned in a Fourier domain to reserve structural consistency; and solving an affine transformation matrix with unchanged illumination in the transition zone, and globally optimizing color connection between the restoration area and the original wall painting. According to the method, the dynamic grammar rule base is established by analyzing the fractal features of the residual strokes, so that the generated texture follows creation logic, and the visual coherence of a recovery area is improved.

The application discloses a high-transmittance absorption type color matching filter, a preparation method and a three-channel filter set. The method comprises the following steps: cleaning, drying and surface activation treatment of a transparent substrate; preparing at least two absorption layer coating liquids with different spectral absorption characteristics according to the spectral characteristics of a target matching waveband; layer-by-layer coating and solidification of the coating liquids on the surface of the transparent substrate to sequentially form 2-5 absorption sub-layers, so as to obtain a composite absorption film; and depositing a transparent dielectric layer on the surface of the composite absorption film as a hard protective layer, so as to obtain the filter. The application also provides a high-transmittance absorption type color matching filter prepared by the method and a three-channel color matching filter set comprising X, Y and Z three-channel filters. The application is used for solving the problems of low matching precision and low transmittance of the existing color matching filter.

This invention relates to the field of dual-passband filter technology and discloses an ultra-narrowband high-temperature superconducting symmetrical dual-channel filter. The invention establishes a high-order coupled topology based on CT and CQ units, enabling free adjustment of the zero positions between the two sub-passbands and the introduction of a pair of transmission zeros out of the dual-passband filter, thus achieving good sideband suppression between sub-passbands and throughout the entire dual-passband filter.

The invention provides a spatial audio processing method of a volume sound source, spatial audio processing equipment of the volume sound source and a computer readable storage medium. The spatial audio processing method for the volume sound source comprises the following steps: acquiring first position information, a first geometric feature and a first acoustic feature of the sound source, second position information, a second geometric feature and a second acoustic feature of a shielding object, and third position information of a listener to perform ray tracing; determining the projection position of each tracking light on the spherical surface of the listener and the energy intensity corresponding to the projection position according to the light tracking result; determining a spherical harmonic coefficient of the sound source according to the projection position of each tracking light on the spherical surface of the listener and the corresponding energy intensity, so as to generate a multi-channel filter; and filtering a point sound source signal of the sound source using the multi-channel filter to generate a volumetric sound source signal conforming to the first geometric feature.

A method is disclosed of selecting users for multi user multiple-input multiple-output (MU-MIMO) communication from an initial set of potential users. The method comprises repeating the following steps in successive iterations until a stopping criterion is met: determining a channel correlation metric for each user in the set of potential users, reducing the set of potential users by exclusion of a user based on the channel correlation metric, and calculating a performance metric of the set of potential users. The method also comprises selecting users corresponding to one of the sets of potential users, wherein the selection is based on a comparison of the calculated performance metrics of the sets of potential users. The channel correlation metric for a user may comprise one or more of: a channel filter norm for the user, a channel norm for the user, a channel gain for the user, pair-wise correlations between the user and one or more other users of the set of potential users, and a channel eigenvalue for the user. The performance metric may comprise one or more of: a sum-rate, a per-user-rate, an average error rate, a maximum error rate, a per-user error rate, and a sum-correlation. Corresponding apparatus, network node and computer program product are also disclosed.

Techniques are disclosed for the use of Crest Factor Reduction (CFR) technique that utilizes a cancellation pulse signal having a reduced length. The CFR technique may be applied to a signal to be transmitted, which may comprise a composite signal having one or more carrier signals. Each carrier signal of the composite signal may be filtered via a respective channel filter and then recombined to form the signal to be transmitted, on which the CFR operations are then applied. The length of the cancellation pulse signal is less than the number of taps of the channel filter with the largest number of taps. This reduction in cancellation pulse signal length significantly reduces the processing power required to perform the CFR operations while maintaining regulatory emissions compliance.

The utility model belongs to the technical field of communication equipment, and particularly relates to a frequency division dual-channel filter, which comprises a cavity cover plate, a device cavity, a connector and a mounting bracket, the device cavity is of a hollow cuboid structure, and an opening is formed in the upper end face of the device cavity. The cavity cover plate is of a flat-plate-shaped structure matched with the opening and fixedly covers the opening in the upper end of the device cavity through evenly-distributed installation screws, and a sealed cavity is formed. According to the utility model, the large cavity design is adopted, and the insertion loss and standing-wave ratio index of a product are effectively improved, so that the transmission quality of communication signals is improved; two input ports and two output ports are arranged, so that when the device is connected with a dual-port device, the device can be connected through a jumper wire; the installation support is additionally designed, so that the product can be installed on a cabling rack, a cabinet or a platform, and installation and maintenance are convenient.

The utility model discloses a series power supply formula low -power consumption television receiving antenna signal amplifier circuit, including UHF signal input terminal anti -static and strong pulse circuit (1), UHF channel filter circuit (2), first -stage UHF channel amplification unit (3), second -stage UHF channel amplification unit (4). Further including amplifier UHF and VHF channel hybrid output circuit (11), VHF signal input terminal anti -static and strong pulse circuit (8), VHF channel filter circuit (9), power supply input rectifier filter circuit (6), voltage stabilizing and decoupling circuit (5), decoupling voltage division's front -stage series power supply circuit (7) and VHF amplification unit (10). Or including RF signal input channel filter circuit (13), first -stage RF channel amplification unit (14), second -stage RF amplification unit (15) and decoupling voltage division's front -stage series power supply circuit (7). The utility model discloses through series power supply mode, make the total current of amplifier equal the current of second -stage amplification unit, relative parallel type circuit saves nearly 50% power consumption, reduces the requirement to transformer power, thereby reduces the cost.

The embodiments of the present application disclose a measurement method, device, baseband chip, terminal, and storage medium, belonging to the field of communication technology. The method includes: estimating channel parameters based on a reference signal to obtain a parameter estimation result; determining a target filter from at least two candidate filters based on the parameter estimation result; performing channel filtering processing on the reference signal using the target filter to obtain a reference signal filtering result, wherein the channel filtering processing is used to filter out interference and noise in the reference signal; and calculating a measurement item based on the reference signal and the reference signal filtering result. The method provided in the embodiments of the present application can improve the measurement accuracy on the terminal side.

The utility model relates to the technical field of surfactant production, and discloses a filtering and impurity removing device for surfactant production, which is characterized in that a multi-channel conveying structure consisting of three liquid outlet pipes, filter pipes and a liquid inlet pipe of an upper box body is arranged, and each filter pipe can be independently and alternately used, so that the parallel operation of online filtering and offline cleaning is realized; when the filter efficiency of the filter element in a certain filter pipe is reduced due to impurity accumulation, the flow sensor monitors the flow change of the liquid inlet pipe in real time, when the flow change is lower than a preset threshold value, the electromagnetic valve of the corresponding liquid outlet pipe is automatically triggered to be closed, the warning lamp synchronously sends out a maintenance prompt, and the other filter pipes still maintain normal filtration. The problem that a whole machine is shut down when a traditional single-channel filter element is maintained is avoided, the production continuity is remarkably improved, the filter pipe is rapidly disassembled through a fixing piece, a fastening screw and a ring groove sealing structure, the single-time maintenance time is greatly shortened compared with a traditional mode, it is guaranteed that no material leaks in the disassembling process through a sealing gasket, and the productivity loss and the labor cost are effectively reduced.

A user equipment, method and computer program for adjusting an effective center frequency of a channel filter in a user equipment to improve adjacent channel selectivity when a network transmits on an irregular bandwidth channel and the user equipment receives signals via a channel filter with a passband wider than the channel bandwidth. The method includes filtering a received wireless communication signal at the channel filter. A preferred center frequency of the channel filter is identified by: adjusting the center frequency of the channel filter; determining a level of adjacent channel selectivity of the signal filtered by the channel filter; comparing the levels of adjacent channel selectivity at different center frequencies of the channel filter; and identifying the preferred center frequency as the center frequency that provides the highest level of adjacent channel selectivity.

System for processing signals from a gyroscope (102), comprising: at least one drive channel (104) designed to receive an output from a drive axis (110) of the gyroscope (102), wherein the at least one drive channel (104) includes the following: a drive channel analog-to-digital converter (ADC) (112) which receives a drive signal from the drive channel (104) and outputs a digitized drive signal; a drive channel phase-correct demodulator (114) that receives the digitized drive signal and generates a phase-correct demodulated drive signal; at least one drive channel filter (118) that receives the phase-correct demodulated drive signal and outputs a filtered phase-correct demodulated drive signal; and a phase-locked loop (PLL); a detection channel (106) designed to receive an output from a detection axis (108) of the gyroscope (102), wherein the detection channel (106) includes the following: a capture channel ADW (124) that receives an analog rate signal from the capture channel (106) and outputs a digitized rate signal; and a digital signal processor (125) which includes the following: a detection channel phase-correct demodulator (126) that receives the digitized rate signal and generates a phase-correct demodulated rate signal; a capture channel quadrature-phase demodulator (128) that receives the digitized rate signal and generates a quadrature-phase demodulated rate signal; a first acquisition channel filter (130) that receives the phase-correct demodulated rate signal and outputs a filtered phase-correct demodulated rate signal; and a second acquisition channel filter (132) that receives the quadrature-phase demodulated rate signal and outputs a filtered quadrature-phase demodulated rate signal; and a digital subtraction circuit (134) that subtracts the filtered phase-correct demodulated drive signal from the filtered phase-correct demodulated rate signal to generate a sensing axis output signal.

The application discloses a miniaturized hybrid bridge coupling filter combining module based on a copper-based LTCC and belongs to the technical field of wireless communication, which comprises a ceramic block Sub, the inner bottom side of the ceramic block Sub is provided with a symmetrically distributed first quadrature hybrid bridge C1 and a second quadrature hybrid bridge C2; the inner top side of the ceramic block Sub is provided with a parallel first band-pass filter F1 and a second band-pass filter F2; the first quadrature hybrid bridge C1 and the second quadrature hybrid bridge C2 are located in the lower half of the ceramic block Sub, while the first band-pass filter F1 and the second band-pass filter F2 are located in the upper half of the ceramic block Sub; and the compact and miniaturized product design is realized by using the stacked structure of the hybrid bridge and the filter, and the technical problem that the realization of the hybrid bridge coupling filter combining module in the prior art contains two same 90° electric bridges and channel filters, thereby resulting in a large volume in the traditional cavity scheme is solved.

The application discloses a kind of detection method and system based on improved yolov5-SFF in the field of video identification, comprising: real-time video data is input into the Yolov5-SFF detection model pre-trained to obtain the detection result of worker operation behavior;The training process of Yolov5-SFF detection model includes: historical video data is collected, and training dataset is constructed;Using difference hash sampling algorithm, the frame picture of each group of historical video data is sampled and screened, and the operation behavior in the frame picture screened is labeled;Add channel filtering module and spatial attention module to backbone network, sequentially stack backbone network, head network, space-time feature fusion module and identification module to build Yolov5-SFF detection model;Using historical video data in training dataset to which operation behavior label is added, train Yolov5-SFF detection model, repeat training until the detection accuracy of Yolov5-SFF detection model tends to be stable;It improves detection and identification precision, and also guarantees the speed of algorithm real-time detection.

This invention belongs to the field of multi-beam antenna arrays and discloses a filtered multi-beam array and method based on a four-channel filter jumper. By integrating a microstrip-to-substrate integrated waveguide structure, a filter Butler matrix containing a four-channel filter jumper, and an antenna array on a first metal layer, a filtered multi-beam array based on a multi-layer planar structure is constructed. The four-channel filter jumper utilizes multiple resonant cavities and coupling structures, and by precisely controlling the coupling phase between the resonant cavities, a preset phase shift is directly introduced while achieving the filtering response, thus integrating filtering and phase-shifting functions into a single device. This design avoids the complex structure of filter couplers and the additional losses of filter phase shifters in traditional integrated schemes, significantly simplifying the device architecture, reducing transmission loss, improving system integration and beamforming accuracy, and effectively meeting the urgent needs of 5G and future 6G communication systems for high performance, low loss, and high integration.

The application discloses a broadband gain and frequency tunable high-Q filter, which comprises a low-noise amplifier unit and a differential N-channel filter unit, wherein the low-noise amplifier unit is a load-balanced low-noise amplifier with tunable gain, single-end input and differential output; the differential N-channel filter unit is driven by a four-phase clock with a phase difference of 90 degrees, and the four-phase clock input is connected with an externally input signal with a phase difference of 90 degrees; the input end of the low-noise amplifier is connected with an input signal of an antenna end, the output positive end of the low-noise amplifier is connected with the input positive end of the differential N-channel filter, and the output negative end of the low-noise amplifier is connected with the input negative end of the differential N-channel filter. On the basis of the high-Q filter, the application realizes the characteristics of single-end to double-end signal receiving, gain adjustment, filter center frequency tuning, low noise, high bandwidth, output differential balance and strong load capacity.

According to the multilayer dual-channel substrate integrated waveguide filter, a cross slot is formed in a metal substrate between adjacent SIW cavities, the intersection point of the cross slot is located in the center of the SIW cavity and located at the strongest magnetic field position of a TE102 mode and a TE201 mode, the TE102 / TE201 mode and a TE101 mode can be physically segmented, the isolation degree is improved, and meanwhile, the cross slot is formed in the metal substrate between the adjacent SIW cavities; according to the invention, a multi-layer structure is adopted, strong coupling and energy transmission of two orthogonal modes TE102 and TE201 can be realized, and the unique orthogonal mode coupling mechanism is combined with the multi-layer structure, so that the structure shows good frequency selection characteristics and high channel isolation while keeping a compact size, and mode interference and crosstalk of a traditional multi-channel filter do not exist; and a high-performance dual-passband filtering function is realized.

A remote sensing satellite data transmission subsystem based on multi-stage noise suppression comprises a data transmission integrated intelligent terminal, a multi-stage high-suppression-performance channel filter, an adjustable suppression degree phased array antenna, power supply and control equipment; the signal output by the data transmission integrated intelligent terminal is transmitted through the adjustable suppression degree phased array antenna after being filtered by the multi-stage high-suppression-performance channel filter; the power supply and control equipment is used for power supply and data transmission with the data transmission integrated intelligent terminal and the adjustable suppression degree phased array antenna respectively; the multi-stage high-suppression-performance channel filter suppresses the sensitive frequency band of the data transmission subsystem through its own multi-stage coaxial cavity and tuning screw; the adjustable suppression degree phased array antenna suppresses the sensitive frequency band of the data transmission subsystem by setting resonators in its own filtering module.

The utility model belongs to the technical field of filtering devices, and particularly relates to a water conservancy channel filtering device which comprises a gutter channel, clamping grooves are symmetrically formed in the gutter channel, a square frame is arranged in the clamping grooves in a penetrating mode, two sets of filtering plates are symmetrically arranged in the square frame, threaded holes are symmetrically formed in the filtering plates, and the threaded holes are communicated with the clamping grooves. And supporting blocks are symmetrically arranged on the square frame, through holes corresponding to the threaded holes are formed in the supporting blocks, positioning bolts are arranged in the through holes in a penetrating mode, and a limiting assembly is arranged in the square frame. According to the water conservancy channel filtering device, when one group of filtering plates is detached and cleaned by installing the two groups of filtering plates, the filtering effect of the water conservancy channel filtering device on a water source cannot be influenced, the positioning bolts corresponding to the blocked filtering plates are rotated, so that the positioning bolts are separated from the threaded holes, and the filtering plates are not limited any more and can be detached, replaced and cleaned; and in the period, the other group of filter plates continue to filter the water source, so that the water source filtering effect is not influenced.

The utility model discloses a multi-channel filter with a shielding function. The multi-channel filter comprises an insulating body, a connecting terminal, a filtering assembly and a shielding piece, the plurality of filtering assemblies are transversely arranged at intervals, each filtering assembly is arranged in the corresponding mounting cavity, and the filtering assemblies are matched with the shielding parts to be arranged in the insulating body and located between the two adjacent mounting cavities, so that the filtering assemblies between different channels perform signal shielding through the shielding parts; therefore, signal crosstalk between the adjacent filtering assemblies is prevented, the distance between the adjacent filtering assemblies does not need to be increased, the overall size of the filter is reduced, meanwhile, filters of different channels do not need to be placed on the two sides of a mainboard respectively, the installation space of the mainboard occupied by the filters is reduced, and the installation efficiency is improved. And the requirement of product miniaturization can be met.

The application discloses a multi-channel filter and a frequency selection module thereof. The frequency selection module of the multi-channel filter comprises a multi-channel filter module, an input switch module and an output switch module; input ends of at least two filter channels are connected to an output end of the input switch module after being combined; input ends of at least two other filter channels are connected to another output end of the input switch module after being combined; output ends of the at least two filter channels are connected to an input end of the output switch module after being combined; output ends of the at least two other filter channels are connected to another input end of the output switch module after being combined; and a frequency range set after the input ends of the filter channels are combined is identical to only one frequency range set after the output ends of the filter channels are combined. The switching structure of the filter channels provided by the embodiment of the application is simple and the signal transmission effect is good.

The invention relates to the technical field of firmware burning, in particular to an OV camera firmware burning system and method, and the system comprises a bus channel screening module, a write-in instruction tracking module, an instruction path offset checking module, a read-back field collaboration module and a burning closed loop verification module. According to the method, the corresponding relation between the master control node serial number and the clock signal and data signal triggering time point is established, non-overlapping signal channels are screened to extract the first channel task identifier, the comparison logic between the field transmission track and the response sequence is constructed, and the task offset module is identified by combining the channel sequence and serial number mapping; and associating a task number interval according to field displacement characteristics, tracking the sequence difference of fields in the write-in and read-back processes, completing the joint comparison of a transmission path and a field number, enhancing the sequence cooperation capability of a cross-node task, and enhancing the completeness of field sequence consistency control and task process closed-loop tracking.

The main embodiment of the invention relates to a user equipment (UE) with a single receiver chain and a single channel filter which can operate in a first mode and in a second mode. In a first mode,

The invention discloses an in-band flatness compensation method and system based on a large-bandwidth spectrum analyzer, and relates to the technical field of signal processing, and the method comprises the following steps: obtaining and optimizing a complex compensation coefficient table corresponding to the in-band frequency response of a radio frequency front-end channel filter through a dynamic inner ring calibration and compensation optimization system; receiving a to-be-measured radio frequency signal, filtering the to-be-measured radio frequency signal through the radio frequency front-end channel filter, and performing analog-to-digital conversion and digital down-conversion processing to form a to-be-measured baseband I / Q data frame; performing windowing and fast Fourier transform on the baseband I / Q data frame to be measured to obtain a frequency spectrum of a signal to be measured; performing frequency domain complex multiplication on the frequency spectrum of the signal to be measured and the corresponding complex compensation coefficient in the compensation coefficient table to obtain a compensated signal frequency spectrum; and performing inverse fast Fourier transform on the compensated signal spectrum, and outputting an I / Q signal. According to the invention, logic resource consumption and errors can be reduced.

The invention belongs to the technical field of signal generators, and particularly relates to an IQ baseband generation method and device at any symbol rate, and the method comprises the steps: obtaining IQ symbol data, carrying out the channel filtering of the IQ symbol data, and generating channel filtering IQ data with a predetermined bandwidth, the channel filtering IQ data having an original sampling rate; performing fractional resampling on the channel filtering IQ data to generate resampled IQ data, the fractional resampling being configured to increase an original sampling rate to a target sampling rate, the target sampling rate being defined as an integer fraction of a digital-to-analog conversion sampling rate; and carrying out integral multiple interpolation filtering on the resampled IQ data, increasing the target sampling rate to be consistent with the digital-to-analog conversion sampling rate, and carrying out digital-to-analog conversion to generate an IQ baseband signal. According to the method, fractional resampling is carried out on the channel filtering IQ data, so that the baseband generator can support continuous change and arbitrary setting of the symbol rate, and the universality and flexibility of the system are greatly improved.

The invention discloses a copper-based LTCC (Low Temperature Co-Fired Ceramic)-based miniaturized hybrid bridge coupling, filtering and combining module, which belongs to the technical field of wireless communication and comprises a ceramic block Sub, and a first orthogonal hybrid bridge C1 and a second orthogonal hybrid bridge C2 which are symmetrically distributed are arranged on the bottom side in the ceramic block Sub; a first band-pass filter F1 and a second band-pass filter F2 which are parallel to each other are arranged on the top side in the ceramic block Sub; the first orthogonal hybrid bridge C1 and the second orthogonal hybrid bridge C2 are located at the lower half part of the ceramic block Sub, and the first band-pass filter F1 and the second band-pass filter F2 are located at the upper half part of the ceramic block Sub; and a compact and miniaturized product design is realized by utilizing a hybrid bridge and filter stacked structure, so that the technical problem of huge volume in a traditional cavity scheme caused by the fact that a hybrid bridge coupling filtering combining module in the prior art comprises two same 90-degree bridges and channel filters is solved.

This invention discloses a method and apparatus for implementing TLB obsolescence operations for multi-replica non-atomic writes. It provides a TLB obsolescence processing module comprising three request queues, a TLB obsolescence response counter, and a response channel filter. Through a unique protocol flow, processing method, and counting mechanism, it ensures that all preceding write operations have been truly completed by the time the TLB obsolescence instruction is executed, thus solving the implementation problem of TLB obsolescence operations in Non-MCAW. The completion of preceding write operations is marked by the arrival of the storage consistency point. Furthermore, the problem of determining the completion mark of write operations is solved by adding a two-level broadcast protocol flow and a TLB obsolescence response counter. This approach offers advantages such as reliable judgment results and low hardware implementation overhead.