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163 results about "Channel power" patented technology

Grid-connected inverter control method based on second-order linear active disturbance rejection

The invention discloses a grid-connected inverter control method based on second-order linear active disturbance rejection, and particularly relates to the field of grid-connected inverter control. Voltage and frequency error signals between the output side of the inverter and the power grid are obtained, a pre-synchronization control model is constructed, and voltage amplitude and frequency synchronization is achieved; a second-order linear active-disturbance-rejection controller is introduced in the frequency synchronization control process, an extended state observer is adopted to estimate the output frequency, the frequency change rate and a disturbance term, and a state error feedback control law is combined to generate a frequency regulation control quantity, so that accurate frequency control is realized; after grid connection, a dual-channel LADRC power regulation controller is constructed, and decoupling tracking control is carried out on active power and reactive power; meanwhile, on the basis of fast Fourier transform processing as a stable grid-connected state criterion, the method has the advantages of being high in control precision, high in anti-interference capability, good in current waveform quality, high in adaptability and the like, and is suitable for various grid-connected application scenes.
Owner:NANCHANG INST OF TECH

Power adaptive congestion control method for power grid monitoring

The invention is applicable to the technical field of power distribution network monitoring, and provides a power grid monitoring-oriented power adaptive congestion control method, which comprises the following steps of: acquiring a network performance index and a power grid operation parameter of a power grid monitoring data transmission network, and determining a congestion state of a current network through a preset congestion evaluation model; a 5G ad hoc network node connection strength coefficient, a new energy monitoring data priority label, a west-to-east transmission channel power flow fluctuation coefficient and a regional vulnerability index are used as decision variables, and the minimum weighted transmission delay, the packet loss rate and the maximum new energy consumption responsivity are used as objective functions. Generating a control strategy corresponding to the current network congestion state according to the hybrid intelligent optimization model fusing reinforcement learning and a genetic algorithm; executing the control strategy to dynamically adjust the network resources; monitoring the execution effect of the control strategy, and feeding the result back to the model to update the parameters; and therefore, the requirements of multi-target optimization and differential service quality in a complex power grid monitoring scene can be met.
Owner:GUANGXI POWER GRID CORP

Channel power spectrum estimation method based on measurement report data and related equipment

The embodiment of the invention provides a channel power spectrum estimation method based on measurement report data and related equipment. The method comprises the following steps: acquiring multiple pieces of measurement report data of a communication system to be tested; inputting each piece of measurement report data into a data positioning model for prediction processing to obtain a prediction position corresponding to each piece of measurement report data; based on each piece of measurement report data and the corresponding prediction position, communication grid division is carried out on each piece of measurement report data to obtain a division grid set, and the division grid set comprises a communication grid index of each piece of measurement report data; determining average grid report data of a plurality of pieces of measurement report data in each communication grid based on the divided grid set, and determining a grid center position of each divided grid; and performing estimation calculation based on the average grid report data and the grid center position to obtain an estimated channel power spectrum from the base station to each communication grid, thereby improving the accuracy and robustness of power spectrum estimation.
Owner:SHENZHEN RES INST OF BIG DATA

Time-sharing multi-channel power distribution system and control method thereof

The invention provides a time-sharing multi-channel power distribution system and a control method thereof, and the system comprises a microwave excitation source which is used for generating a continuous wave radio frequency signal; the common end of the multi-channel radio frequency switch is connected with the output end of the microwave excitation source, and the multi-channel radio frequency switch is used for switching a radio frequency signal to any one of a plurality of output channels of the multi-channel radio frequency switch in a time-sharing manner; the control module is electrically connected with the control end of the multi-channel radio frequency switch, and the control module is used for outputting a control signal according to a preset time sequence so as to drive the multi-channel radio frequency switch to be switched among different output channels; the directional protection module is connected between the microwave excitation source and the multi-channel radio frequency switch and is used for guiding reflection power from an output channel to a matched absorption load, so that the inherent problem of power division attenuation of a traditional power divider is solved; therefore, each output channel can obtain almost all original input power in the working gap, thereby greatly improving the power utilization rate and the transmission efficiency.
Owner:ZHONGJIU FLASH MEDICAL TECHNOLOGY CO LTD

Multi-path power regulator control method and system

The invention relates to the technical field of output sharing control, in particular to a multi-path power regulator control method and system, and the method comprises the following steps: collecting real-time data to establish a data queue, calculating a mean value and a standard deviation to generate a dynamic operation baseline, collecting the real-time data to establish the queue, calculating the mean value and the standard deviation to generate a dynamic baseline, the method comprises the following steps: calculating an adaptive over-current and open-phase alarm threshold based on a baseline, adding an external control quantity to obtain a total power demand, adjusting the number of cycles according to the stability of a load, reducing the number of active whole waves in proportion when the number exceeds the limit, and stopping a thyristor triggering instruction when the current or voltage abnormally and continuously reaches a preset count. According to the method, the self-adaptive threshold is calculated by establishing the dynamic operation base line in combination with the fluctuation amplitude and the sensitivity factor, current and voltage abnormity is specifically recognized, the total cycle number and the active whole wave number are adjusted in combination with the external power requirement and the load stability, single trigger angle control dependence is avoided, and power distribution balance and electric energy supply stability are achieved; and the equipment damage risk is reduced.
Owner:HUNAN SANSUO INTERNET OF THINGS INFORMATION TECH CO LTD

A method and system for determining a bitrate allocation of a plurality of optical channels in an optical transmission link

A method for determining a bitrate allocation of a plurality of optical channels in an optical transmission link with discretized channel bitrates, the method comprising determining an initial discretized bitrate allocation and a corresponding initial power allocation for the plurality of optical channels for supporting the initial discretized bitrate allocation with the proviso that all optical channels meet a pre-defined optical signal-to-noise, OSNR, threshold for the respective initial discretized bitrate allocated to the respective optical channel; starting from the initial power allocation, varying, for an investigated optical channel of the plurality of optical channels, a channel power of the investigated optical channel to estimate a highest supported discretized bitrate for the investigated optical channel, wherein the highest supported discretized bitrate is the highest discretized bitrate for which the investigated optical channel meets a corresponding OSNR threshold; including the investigated optical channel in an upgrade candidate subset of the plurality of optical channels for potential bitrate upgrades based on the highest supported discretized bitrate exceeding the initial discretized bitrate for the investigated optical channel; and providing the upgrade candidate subset to an upgrade allocation algorithm.
Owner:HOCHSCHULE FUR ANGEWANDTE WISSENSCHAFTEN MUNCHEN

Bridge road section monitoring early warning and prevention and control system

The invention relates to a bridge road section monitoring early warning and prevention and control system, and belongs to the technical field of traffic safety. The system comprises a data acquisition end, a data processing end, a first dual-channel power supply module and a second dual-channel power supply module, the data acquisition end comprises an image processing device, a sensor, a video sensing device and an unvarnished transmission data sending device; the data processing end comprises a core control unit, an early warning screen controller, a bridge abnormal state early warning screen and a transparent transmission data receiving device; according to the invention, real-time monitoring of the health state of the bridge in the bridge section can be realized, the method is suitable for in-service highway bridges, the traffic safety capability of the bridge section under severe weather conditions is improved, the defects of traditional bridge monitoring are overcome, and monitoring blind spots of the highway bridges are eliminated.
Owner:YUNNAN TRAFFIC PLANNING DESIGN RESEARCH INSTITUTE CO LTD

Device for testing dark current of photodiode

The utility model discloses a photodiode dark current testing device, comprising an LED lamp, a light shield, a dual-channel power supply, a desk type universal meter, a one-chip microcomputer control board and a multi-channel test board, the light shield is covered on the multi-channel test board, the multi-channel test board is provided with PD sockets having the same number as the channels of the multi-channel test board, and the PD sockets are connected with the desk type universal meter. The PD socket is composed of a 4P socket and Y-shaped sockets arranged side by side. After the scheme is adopted, the efficiency is greatly improved through multi-channel testing, and the vertical pins can be automatically tested through the design of the Y-shaped socket.
Owner:XIAMEN SAN U OPTRONICS

Circuit for realizing multi-path power supply output under-voltage fault indication

The invention relates to a circuit for realizing multi-path power supply output under-voltage fault indication, and belongs to the field of power supply converters. The invention provides a circuit for realizing multi-path power supply output undervoltage fault indication. The circuit comprises voltage-regulator tubes D2 and D3, resistors R2, R3, R4, R5 and R6, photoelectric couplers U1 and U3, MOS (Metal Oxide Semiconductor) tubes U2 and U4, an indication lamp D1 and a 3.3 V power supply V3. According to the circuit, under-voltage fault monitoring can be carried out on the output voltage of multiple paths of power supplies, the circuit is not limited to whether the outputs of the paths are in common ground or not, the under-voltage threshold value of the output voltage can be set by adjusting the voltage stabilizing value of the voltage stabilizing tube, and when any path is under-voltage, the fault indicating lamp can be triggered to work. Every time one path of output voltage detection is added, a primary optocoupler is connected in series in a detection main loop.
Owner:BEIJING INST OF COMP TECH & APPL

Parallel aging test device for ac-dc signal acquisition terminal

The utility model provides a kind of parallel ageing test device of ac-dc signal acquisition terminal, and the device core is in the ageing test technical field of acquisition terminal, and the efficiency, reliability and economy of ageing test are significantly improved by multi-channel power input and intelligent switching mechanism;It adopts multi-channel ac and dc power input design, and the input voltage state is accurately monitored by means of opto-coupler isolation chip, and the relay is intelligently controlled by microcontroller according to the collected data, to realize the flexible switching of ac and dc power supply, effectively avoid the interference of input abnormality on test process, and enhance the stability and adaptability of test. It aims at solving the problems of low reliability of single voltage input, low test efficiency, high cost and inability to realize multi-channel voltage independent adjustment in the prior art.
Owner:XIAMEN FOUR-FAITH SMART POWER TECH CO LTD

Multi-channel power supply system in self-sustaining energy type underwater closed cabin

The invention provides a multi-channel power supply system in a self-sustaining energy type underwater closed cabin. The multi-channel power supply system comprises a self-sustaining battery, a power supply control board, an integrated communication circuit, a multi-channel output load circuit, a power supply system external trigger on-off controller and a power supply system external communication interface, the self-sustaining battery is connected with the power supply control board through the onboard rectangular connector; the power supply control board comprises an input connector, a filter circuit, an integrated circuit wall-attached heat conduction shell and an output interface; the integrated communication circuit is arranged on the power supply control board, is connected with an external communication interface of a power supply system and is used for receiving an external trigger instruction and sending internal state information; the power supply system external trigger on-off controller is connected with the integrated communication circuit so as to control on-off of the power supply system based on an external trigger signal; the multi-channel output load circuit comprises a plurality of output channels, each output channel comprises a relay, and the relays are connected with the integrated communication circuit so as to control output on-off based on the internal state information and the external state information.
Owner:SHANGHAI MARINE ELECTRONIC EQUIP RES INST (NO 726 RES INST OF CHINA STATE SHIPBUILDING CORP)

Multi-channel power analyzer

The utility model relates to the technical field of analyzers, and discloses a multi-channel power analyzer, which comprises a bottom plate and a box body, a dismounting mechanism is fixedly arranged on the side surface of the box body, and a heat dissipation mechanism is arranged in the box body; the dismounting mechanism comprises a mounting box, and a connecting plate is fixedly mounted on the inner wall of the mounting box. When the interior of the analyzer needs to be overhauled and maintained after the analyzer is used for a long time, a pressing block is pressed to drive an ejector rod to move downwards, at the moment, the ejector rod pushes a slope arranged on the side face of a clamping block to move and compresses a second reset spring, and when the clamping block is separated from a bayonet formed in the side face of a cover plate, the cover plate can be separated from a box body by pulling a handle. The interior of the box body is overhauled and maintained, after overhauling is completed, a cover plate makes extrusion contact with a clamping block through a handle, a second reset spring resets to push the clamping block to enter a clamping opening, fixing of the cover plate is completed, the overhauling and maintaining speed and efficiency of the device can be improved to a great extent, practicability is improved, and the labor intensity of workers can be relieved.
Owner:NANJING JIATUO ELECTRONICS CO LTD

Active intelligent lock system and control method thereof

The invention discloses an active intelligent lock system and a control method thereof, and belongs to Internet of Things safety equipment. The active intelligent lock system is provided with an environment energy collection module, a dual-channel power management module, a dynamic power consumption controller, a multi-mode authentication module, an authorization authentication module, a communication module and a master control MCU (Microprogrammed Control Unit), the environment energy collection module and the dual-channel power management module can improve the power supply endurance of the active intelligent lock system and the safety emergency processing of power supply faults, and the dynamic power consumption controller can provide three different power consumption modes to optimize the dynamic energy consumption in multiple use scenes, so that the utilization rate of electric energy is improved; the multi-mode authentication module and the authorization authentication module provide a multi-person combined unlocking mechanism, the industrial-grade centralized supervision requirement and intelligent management are met, and the use safety and operation convenience of the active intelligent lock system are effectively improved.
Owner:STATE POWER INVESTMENT GRP HUBEI YICHANG NEW ENERGY CO LTD

Circuit board (DCDC multi-channel power supply module)

1. The name of the design product: circuit board (DCDC multi-channel power module). 2. The use of the design product: mainly used for circuit board. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best indicates the design points: perspective view.
Owner:ZHENGZHOU QINXIN ELECTRONIC TECHNOLOGY CO LTD

Multi-channel parallel batch aging test device for special memory cards

ActiveCN224137910UEliminate signal attenuation defectsIntegrity guaranteedStatic storageConvertersChannel power
The utility model relates to a multichannel parallel batch aging test device for special memory cards, and belongs to the field of test tools. Aiming at the technical problems of insufficient channel density, large power supply fluctuation, low protocol conversion efficiency and high data packet loss rate of a traditional test system, the device adopts a bearing framework to integrate 50 independent slot positions, and each slot position is configured with a PCI-E to Express interface converter; the multi-channel power supply distribution unit cooperates with the transient voltage suppression network through the distributed voltage regulation module to realize stable power supply; the central control unit is integrated with the main control processor and the FPGA logic module to realize multi-channel parallel control. The device effectively improves the density of test channels and the quality of a power supply, guarantees the integrity of signal transmission, has wide temperature range adaptability and modular expansion capability, and meets the batch aging test requirements of industrial-grade memory cards.
Owner:CHONGQING AEROSPACE ROCKET ELECTRONIC TECH CO LTD

Broadband Schottky frequency tripling circuit structure and related components

The invention discloses a broadband Schottky frequency tripling circuit structure and related components, and relates to the field of signal processing. Two groups of Schottky diode strings which are reversely connected in parallel are integrated on a single radio frequency circuit substrate, and an input split-phase structure and a synthesis output structure are matched, so that independent frequency doubling and power synthesis of two paths of differential signals in a single-chip circuit are realized, the effective power capacity is improved to twice that of a traditional single-channel structure, and the output power is improved. According to the structure, while the power is improved, a complex waveguide network and a plurality of independent radio frequency circuit substrates required by a traditional multi-channel power synthesis technology are avoided, the problems of transmission loss, volume expansion and channel consistency caused by the complex waveguide network and the plurality of independent radio frequency circuit substrates are eliminated, and the unification of high power, broadband, miniaturization and high integration level is really realized.
Owner:INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS

Calibration system and calibration method for noise monitoring device

The invention discloses a noise monitoring device calibration system and method, and the system comprises a standard signal generation module which is used for synchronously generating at least two paths of electric signals based on a first control signal; the multi-channel power amplification and sound source module is used for amplifying each path of electric signal and outputting the electric signal through a corresponding loudspeaker unit; the aliasing sound field control module is used for outputting a first control signal based on the calibration scheme; the standard microphone is used for collecting a sound pressure actual measurement signal of an actually generated mixed sound field; the standard signal acquisition and analysis module is used for performing spectral analysis on the sound pressure actual measurement signal and comparing the spectral analysis result with the preset target sound field parameter, so that the total sound pressure level and the frequency spectrum of the mixed sound field are consistent with a preset target; the calibration management module is used for outputting a calibration scheme; and the comparison module is used for acquiring measurement data of the noise monitoring device to be measured, and comparing and analyzing the measurement data with the sound pressure actual measurement signal and a preset standard value to obtain a comparison result.
Owner:CHINA ELECTRIC POWER RESEARCH INSTITUTE CO LTD +1

Redundant mechatronic system and method for operating

Redundant mechatronic system, wherein: - the redundant mechatronic system (2) is designed as a two-channel system and is connected or connectable to a mechanical arrangement for the delivery of varying mechanical power, - both channels each have a power supply (12.1, 12.2) or a common power supply is connected upstream of both channels, - both channels each contain a control circuit (11.1, 11.2) and are controllable by means of at least one control unit (13), - the control unit (13) acts on the control circuits (11.1, 11.2) such that the control circuits (11.1, 11.2) each switch an electrical power specified by the control unit (13) and obtained from the power supply (12.1, 12.2) to each winding set (10.1, 10.2) of at least one electrically operated actuator in order to generate the mechanical power, - the two channels are operated in parallel during normal operation. suchthat each channel provides half of the currently available mechanical power, - each of the two channels is designed such that, in the event of failure of the other channel, it alone provides the maximum mechanical power required to fulfill a function of the mechanical arrangement, wherein the redundant mechatronic system (2) has arrangements connected to the control unit (13) by means of which overloads in the channels and / or the components of the channels and / or in the mechanical arrangement can be detected by the control unit (13), - when an overload is detected by means of the control unit (13), a reduction factor (Rf) counteracting the overload can be determined and applied by means of the control unit (13), - the reduction factor (Rf) is dimensioned such that, when the reduction factor (Rf) is applied by the control unit (13), the maximum available system power of both channels is sufficient to fulfill the function,- the channel power can be controlled by the control unit (13) using the reduction factor (Rf) as a control variable, such that the respective current channel power counteracts the overload, characterized in that, by means of the control unit (13) of the redundant mechatronic system (2), the reduction factor (Rf) can be set in the mechanical arrangement when an overload occurs, such that when applied by the control unit (13), the power is reduced in one channel and increased in the other channel by the same amount, alternating over time.
Owner:AUDI AG

Miniaturized multi-channel power divider applied to low frequency band

The invention discloses a miniaturized multi-channel power divider applied to a low frequency band, which comprises a total port matching transmission line, at least two groups of sub-port matching transmission lines and corresponding sub-port isolation networks, and is characterized in that the total port matching transmission line is connected with each sub-port matching transmission line through a microstrip transmission line and a T-shaped transmission line; the tail ends of the branch port matching transmission lines are connected with the branch port isolation networks, the tail ends of all the branch port isolation networks are communicated with one another, and the working frequency range is 32.5 MHz to 37.5 MHz. The lumped elements and the microstrip lines are matched to optimize the impedance characteristic, the size is only 1 / 10 of that of a conventional power divider, and the problem that the size of a low-frequency-band power divider is too large is solved; and meanwhile, the multi-path power divider has low insertion loss, high port isolation and good phase consistency, can realize multi-path power distribution by adjusting the number of branches, is adaptive to the compact radio frequency module requirements of portable and embedded equipment, and is suitable for scenes such as private network communication, Internet of Things, aviation communication and the like.
Owner:ANHUI HEXU MICROWAVE TECH CO LTD

Receiving end converter station small interference modeling method based on power dynamic decomposition

The invention provides a receiving end converter station small interference modeling method based on power dynamic decomposition. The method comprises the following steps: decomposing power disturbance corresponding to a phase dynamic transfer function of potential in a receiving end converter station into a synchronous power component, a damping power component and a channel power component; defining kinetic parameters of the receiving-end converter station according to the three decomposed power components, and reconstructing a phase motion equation of the internal potential of the receiving-end converter station through the kinetic parameters; and combining the phase motion equation with the amplitude dynamic transfer function of the potential in the receiving end converter station to obtain a small interference model of the receiving end converter station. According to the method, the phase motion equation of the potential in the receiving-end converter station is reconstructed through the kinetic parameters, so that the construction of the motion equation is more scientific and reasonable, and the dynamic process of the receiving-end converter station under small interference can be described more accurately.
Owner:WUHAN UNIV OF TECH +2

Power flow scheduling method and system of direct current transmission channel, electronic equipment and medium

The invention relates to the technical field of new energy scheduling, in particular to a power flow scheduling method and system for a direct-current power transmission channel, electronic equipment and a medium. According to the method, related data of a power generation side, a power grid side and a load side and annual transmission electric quantity standard information of a direct current channel are obtained, multi-period production analog simulation processing is executed, and a power transmission channel power flow curve is generated. Comparing the power flow curve of the power transmission channel with the annual transmission electric quantity standard information; if not, feedback correction processing is executed, and multi-period production analog simulation processing is carried out again. And in response to the comparison judgment value reaching a preset standard value, converting a continuous basic curve in the power transmission channel power flow curve into a daily operation template in a piecewise constant form to output a power flow scheduling scheme. According to the technical scheme, the limitation that in the prior art, cooperation of a direct current transmission plan and receiving end power grid operation is insufficient is overcome, and the compliance, economical efficiency and engineering feasibility of direct current transmission channel power flow scheduling are improved.
Owner:STATE GRID ECONOMIC TECH RES INST CO LTD +4

Multi-channel power conversion system based on partial discharge state feedback

The invention discloses a multi-channel power conversion system based on partial discharge state feedback, and particularly relates to the field of power electronics, which comprises a multi-channel power conversion module, a partial discharge monitoring module, a signal processing and anti-interference module, a state evaluation and decision module, a dynamic power control module, a data communication and management module and a predictive maintenance module, partial discharge characteristic parameters are extracted by monitoring partial discharge signals of each power unit in an insulation state in real time, an insulation health state is dynamically evaluated according to the partial discharge characteristic parameters, a corresponding power control strategy is generated, and finally active distribution and optimization of power are achieved by adjusting working parameters of each power conversion unit. According to the multi-channel power conversion system, the crossing from passive protection to active health management is realized, the insulation aging process can be effectively inhibited, and the reliability, the service life and the operation economy of the multi-channel power conversion system are improved.
Owner:HUANTAI POWER SUPPLY CO OF STATE GRID SHANDONG ELECTRIC POWER CO

SSPC-based insulation resistance detection method and SSPC

The invention provides an insulation resistance detection method based on SSPC and the SSPC. The detection method is a method for detecting insulation resistance between the SSPC channel power output and the shell ground and insulation resistance between the SSPC channel power ground and the shell ground. According to the detection method, insulation resistance detection can be carried out on the SSPC channel under the two conditions that the SSPC channel has power voltage input and has no power voltage input. The detection method comprises the following steps: respectively acquiring respective input voltage, output voltage and channel current by using two SSPCs, and calculating to obtain the insulation resistance. According to the detection mode, insulation resistance detection is carried out under the two conditions that the SSPC channel power ground and the machine shell ground are in common ground and are not in common ground. The method is suitable for the aviation field, insulation state self-inspection and fault early warning of power distribution equipment are achieved by measuring SSPC channel input and output insulation resistance, and the reliability of an aviation power distribution network is improved.
Owner:TIANJING AVIATION ELECTRO-MECHANICAL CO LTD

Communication cabin horizontal plate-based switch ring layout method and communication cabin

The invention discloses a switch ring layout method based on a communication cabin horizontal plate and a communication cabin, and belongs to the technical field of spacecraft design. Arranging microwave input equipment on the inner surface of the floor; microwave output equipment is arranged in the area above the horizontal plate on the inner surface of the south-north plate; arranging waveguides on the inner surface of the ground plate and the upper and lower surfaces of the horizontal plate to form input and output waveguide switch rings; and laser and digital processing extension equipment is arranged in the area below the south-north horizontal plate. The corresponding communication cabin adopts the partition layout structure. Through scientific partition and switch ring design, space and heat dissipation layout are optimized, meanwhile, full-system backup of the microwave channel power amplifier unit is achieved, and reliability and expandability of communication loads are remarkably improved.
Owner:XIAN INSTITUE OF SPACE RADIO TECH

Signal power adaptive hierarchical based parallel fiber amplifier channel equalization system

The application discloses a parallel optical fiber amplifier channel equalization system based on signal power adaptive grading, and is characterized in that: the system further comprises a power detection and grading module arranged in front of the parallel amplifier and used for detecting the input optical signal in real time and dividing the optical signal into several power grades based on a preset or adaptive threshold, and a signal distribution and merging module used for guiding the optical signals of different power grades divided to corresponding parallel amplifier paths and merging the optical signals output by each path after the parallel amplifier completes amplification processing to realize channel power equalization; through power grading and differential amplification, the application reduces the difference value of the output power of each channel, realizes intelligent equalization of multi-channel optical signals, improves system gain flatness, effectively reduces the bit error rate caused by power imbalance, avoids the problems of gain saturation of high-power signals and insufficient gain of low-power signals, and improves channel capacity.
Owner:HANGZHOU SUOTONG PHOTONIC TECHNOLOGY CO LTD

Bit and power loading method for OFDM-PON based on hierarchical modulation

The application discloses a kind of OFDM-PON bits and power loading method based on layered modulation, belong to passive optical network field.The application includes: based on the signal-to-noise ratio between each branch optical network unit and optical line terminal in OFDM-PON, each optical network unit is grouped;Low-order quadrature phase modulation modulation format is used as base layer in the optical network unit group with low signal-to-noise ratio, high-order quadrature amplitude phase modulation-16 and quadrature amplitude phase modulation-64 modulation format are used as enhancement layer in the optical network unit group with high signal-to-noise ratio;The trough point of the frequency selective fading of each group optical network unit in OFDM-PON is calculated;According to bit allocation method, power allocation method is carried out for bit allocation and power allocation of base layer and enhancement layer.The application realizes the maximum utilization of flexible OFDM-PON in channel condition by simple and easy-to-implement algorithm, to realize the increase of overall OFDM-PON system capacity, satisfy future optical access network to the full use of channel power abundance.
Owner:THE 54TH RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION

Multi-channel power profile estimation

A method may include obtaining a first waveform corresponding to a first optical signal received at a first optical receiver via an optical link, and a second waveform profile corresponding to a second optical signal received a second optical receiver. The first waveform profile and the second waveform profile may be combined to form a combined waveform profile. A first reconstructed waveform profile that is an estimate of the first waveform profile and a second reconstructed waveform profile that is an estimate of the second waveform profile may be obtained. The first reconstructed waveform profile and the second reconstructed waveform profile may be combined to form a combined reconstructed waveform profile which may be emulated to obtain an emulated reconstructed waveform profile. A power profile estimation corresponding to the optical ink may be determined based on a comparison between the combined waveform profile and the emulated reconstructed waveform profile.
Owner:1FINITY INC

Multi-channel power distribution system and method for large-size wafer etching

The invention belongs to the technical field of semiconductor manufacturing, and provides a multi-channel power distribution system and method for large-size wafer etching. The multichannel power distribution system for large-size wafer etching is characterized in that the multichannel power distribution system comprises a main power unit, distributed sub power units, an impedance matching and power distribution network and an etching chamber, the main power unit generates a reference radio frequency signal and distributes power to each sub power unit; each sub-power unit comprises a plurality of power amplification channels, and the power amplification channels are connected in parallel and output distributed power; the etching chamber comprises an upper electrode and / or a lower electrode, the upper electrode / the lower electrode is divided into concentric annular partitions from the center to the edge, and the partitions are connected with different power amplification channels. According to the invention, through multi-channel independent control and asymmetric power distribution facing edge compensation, the'edge attenuation 'effect can be actively and accurately corrected, and the etching uniformity of the large-size wafer is improved.
Owner:SHANGHAI SHENGZHOU JUNENG SEMICONDUCTOR TECHNOLOGY CO LTD

Digital signal processing method and system based on FPGA mixed use data format

The invention discloses a digital signal processing method and system based on an FPGA mixed use data format, and relates to the field of digital signal processing. The method solves the problems that in the prior art, an optimization method combining fixed-point number operation and floating-point number operation is lacked to solve the problems that at present, signal operation is usually conducted through fixed-point number operation, the dynamic range of the fixed-point number operation is small, and errors of obtained results are large. The module receives radar signals of 32 channels and divides the radar signals into four groups; performing maximum power spectral density comparison on the eight channels in each group, and finally performing inter-group comparison to select a signal with the maximum power spectral density in the 32 channels; and sending the signal to an FPGA for calculation, calculating the signal-to-noise ratio of the signal by using a mixed data format method, comparing the signal-to-noise ratio with a preset minimum signal-to-noise ratio threshold value, if the signal-to-noise ratio is greater than the threshold value, outputting the signal for subsequent processing, otherwise, not outputting a result.
Owner:HARBIN INST OF TECH

High-precision differential transient interruption signal generating system and method thereof

PendingCN122001461AWith self-correction functionSolve the lack of precisionElectromagnetic transmissionChannel powerComputational physics
The invention discloses a high-precision differential transient interruption signal generation system and method, and the system comprises a high-speed pulse light source device which comprises a high-power laser and a low-power laser; the high-power laser and the low-power laser are respectively connected with the optical power distribution device; the dual-channel power meter is connected to the first output ports of the two optical power distribution devices; the high-speed pulse mixer is connected to the second output ports of the two power distribution devices so as to enable the two paths of optical signals output by the two second output ports to be subjected to intensity gradient differential mixing and output analog optical signals; and the lower computer comprises a control module, a self-correction module and a calculation module, the control module is in signal connection with the high-speed pulse light source equipment and the dual-channel power meter, the self-correction module is connected to the control module, and the calculation module is connected to the control module and the self-correction module. The optical fiber transient interruption signal generator solves the problem that an existing optical fiber transient interruption signal generator adopts a single laser source scheme, and the precision of rapid transient signal simulation is insufficient.
Owner:SHANGHAI JIANGMU INTELLIGENT TECHNOLOGY CO LTD