477 results about "Automatic gain control" patented technology

The invention discloses a wireless communication battery management system with a signal adaptive adjustment function, and relates to the field of wireless communication networks. The signal monitoring unit is used for monitoring parameter data of wireless signals in real time and transmitting the parameter data to the signal processing unit, and the signal processing unit comprises a multi-band antenna and a signal acquisition circuit; and the signal processing unit is connected to the signal monitoring unit and is used for receiving the parameter data of the wireless signal transmitted by the signal monitoring unit and carrying out filtering, noise reduction and enhancement processing on the signal through a preset signal processing algorithm. The distributed multi-band antenna design is combined with the automatic gain control technology, the signal receiving range is expanded, blind areas are reduced, the stability of signal collection in a complex environment is improved, signal multi-scale noise reduction is achieved through the wavelet transform algorithm, the signal quality trend is pre-judged in advance in combination with machine learning prediction, and the signal quality is improved. And the control unit is supported to pre-adjust the transmitting power and switch to a high-quality frequency band, so that the probability of communication interruption is reduced.

Provided is a device for sensing initiation. The device includes a processor; a transceiver connected to the processor; and a memory, configured to store one or more executable instructions of the processor; wherein the processor, when loading and executing the one or more executable instructions, causes the device for sensing initiation to: transmit and / or receive at least one frame carrying target information during a sensing measurement process, wherein the target information is related to at least one of a transmit power, a receive automatic gain control AGC gain, a transmit antenna radiation pattern, or a receive antenna radiation pattern.

The invention relates to the technical field of underwater communication and positioning, in particular to a multi-mode underwater wireless communication system based on dynamic link calibration, which integrates underwater acoustic positioning guide, attitude adaptive tracking control, optical link enhancement and an error code correction mechanism. Comprising a central control core, an acoustic communication unit, an optical communication transmitting unit, an optical signal receiving unit, an optical control unit, a multi-axis attitude adjusting unit, a data fusion and verification processing unit and a high-speed modulation-demodulation and error code correction unit. And by using a double-shaft servo motor and automatic gain control, real-time target tracking and accurate alignment of optical signals are realized, FPGA and OFDM modulation are combined to optimize data throughput, and a data cross validation mechanism is introduced to correct error codes, so that the data integrity is improved.

The invention discloses a 10kV medium-voltage power distribution network power line carrier communication method and system based on adaptive OFDM (Orthogonal Frequency Division Multiplexing), and the method comprises the steps that a master station sends a detection frame to a slave station, and the slave station carries out the CE (Channel Estimation), and obtains the CSI (Channel State Information); the method comprises the following steps of: dividing a broadband channel into a plurality of parallel orthogonal subcarriers, and dynamically allocating a modulation mode, a modulation order and a forward error correction (FEC) coding rate for each subcarrier of OFDM (Orthogonal Frequency Division Multiplexing) by adopting a water injection algorithm based on channel state information (CSI); adopting two-stage automatic gain control (AGC) to condition a signal received from a power line; and carrying out dynamic frequency hopping between a frequency band with serious interference and an idle frequency band based on a continuous spectrum sensing result. Compared with the prior art, through the multi-dimensional adaptive technology, the communication system can sense the channel state in real time and dynamically adjust the communication strategy, so that a stable communication link is established in a severe power grid environment.

The invention provides a laser gas telemetering system capable of eliminating the influence of distance change, and aims to solve the problem of inaccurate concentration detection caused by different intensity and receiving quantity of optical signals received by a detector when the telemetering system is in different telemetering distances. Optical signals of different telemetering distances are converted into electric signals meeting detection requirements by automatically regulating and controlling the photoelectric conversion gain multiple, and the core is a pre-amplification circuit capable of regulating and controlling the gain multiple and an automatic gain control algorithm. A photoelectric conversion chip OPA380 and a multiplexer MAX4638 are selected to form the pre-amplification circuit capable of regulating and controlling the gain multiple, and the pre-amplification circuit is provided with eight different gain regulation and control gears. According to the automatic gain control algorithm, detection signals are identified and judged according to the voltage amplitude after photoelectric conversion, and the gain multiple of the pre-amplification circuit is regulated and controlled in real time. According to the invention, the detection accuracy can be improved, and guidance is provided for field application of the mobile telemetering system.

The invention provides a cascade AGC (Automatic Gain Control) frequency modulation regulation control optimization method, which comprises the following steps: acquiring frequency deviation and tie line power deviation in a power system in real time, calculating a regional control error ACE based on the two deviations, and decomposing the ACE into a frequency deviation component and a tie line power deviation component; calculating a ratio coefficient of the frequency deviation component in the ACE and a ratio coefficient of the tie line power deviation component in the ACE; acquiring a climbing rate and an adjustable capacity of each frequency modulation unit, and performing normalization processing on the climbing rate and the adjustable capacity; calculating the rate-capacity double weight of each unit through a dynamic weight formula in combination with the ratio coefficient, the normalized climbing rate and the normalized adjustable capacity, and distributing frequency modulation power to each unit according to the normalized weight; in the operation process, on-line self-adaptive adjustment is carried out on dynamic weight calculation and unit adjustment related parameters according to system performance indexes.

The invention discloses a dual-mode wireless communication two-stage feedback type automatic gain control method and system, and the method comprises the steps: carrying out the amplitude adjustment and modulus adjustment of an analog baseband signal through an analog gain, obtaining a digital baseband signal, comparing the average power of the digital baseband signal with the target power of the analog gain, and calculating an analog gain coarse adjustment value; performing fine adjustment on the analog gain coarse adjustment value through the analog gain adjustment value increment factor, and calculating an analog gain fine adjustment value; performing amplitude adjustment on the analog baseband signal by using the analog gain value to realize first-stage feedback type analog automatic gain control; useful signal detection and abnormal point detection elimination processing are carried out on the digital baseband signal after analog gain amplitude adjustment; calculating the average power of the digital baseband signal after the abnormal points are eliminated according to the period, and calculating a digital gain adjustment value after the abnormal points are eliminated; and performing amplitude adjustment on the digital baseband signal based on the digital gain value to realize second-stage digital automatic gain control.

The present disclosure relates to communication methods and apparatuses in a sidelink communication system. In one example method, a first terminal device determines a first resource based on an obtained automatic gain control (AGC) processing capability of a second terminal device, and sends sidelink information to the second terminal device on the first resource. A slot structure is reconfigured based on the AGC processing capability of the second terminal device.

A method and an apparatus for positioning-related reference signal transmission and reception, and a terminal are provided. The method for transmission includes the following. A positioning-related reference signal is transmitted in at least some of symbols between a first symbol and a second symbol in a target slot, where the first symbol is used for automatic gain control (AGC), and the second symbol is used for transmission / reception (Tx / Rx) switching.

The invention discloses a sound source positioning and intelligent tracking method and system based on a multi-sensor array, and relates to the field of digital signal processing, and the sound source positioning and intelligent tracking method comprises the steps: system starting and environment signal collection; preprocessing and optimizing the signal; sound source positioning calculation; intelligent dynamic tracking; data transmission and real-time display; and data analysis and remote control. According to the invention, high-precision sound source localization is realized through the improved TDOA algorithm and deep learning optimization, and intelligent dynamic tracking of the sound source is ensured by combining fuzzy control and the PID algorithm optimized by the neural network; meanwhile, signal processing is optimized through technologies such as adaptive filtering and automatic gain control, and accurate input is provided; the system supports a multi-mode sensor array, and the tracking precision and adaptability are enhanced in combination with sound source signals and environmental parameters; and the upper computer has remote control and data analysis functions, so that the operability and the data management capability of the system are improved.

A user device, UE, for a wireless communication network, like a 3rd Generation Partnership Project, 3GPP, network, is described. The UE is to communicate with one or more further UEs in the wireless communication network over a sidelink, SL. The UE is configured or preconfigured with a time slot structure allowing a transmission to be started at one of a plurality of starting symbols during a duration of a time slot, the plurality of starting symbols including a first starting symbol and a second starting symbol, the first starting symbol being an automatic gain control, AGC, symbol and the second starting symbol being an AGC symbol and being offset from the first starting symbol. The UE is to start a transmission at the first starting symbol or at the second starting symbol. When the UE starts the transmission at the first starting symbol, the UE is to include into the time slot an additional AGC symbol, the additional AGC symbol being at a symbol of the time slot corresponding the second starting symbol.

The invention provides an automatic gain control system and method based on radio frequency envelope detection, and a receiver. The bias end of an LNA is connected with an automatic gain control module; an envelope detection circuit is also connected between the output end of the LNA and the frequency mixer, and the envelope detection circuit is connected with an automatic gain control module; the detection module is used for outputting a preset level saturation indication signal to the automatic gain control module when an input signal which comes from the output end of the LNA and is greater than preset power is detected; the control end of the VGA is connected with the automatic gain control module; the output end of the ADC is connected with the automatic gain control module; the automatic gain control module performs automatic adjustment of receiver link gain. The fast envelope detection provides extra information, the automatic gain control response speed of the system is improved, the circuit design is simple, the power consumption is smaller, only a smaller chip layout area is occupied, and the cost is lower.

The invention discloses a dynamic frequency adaptive automatic gain control system, which belongs to the field of dynamic frequency adjustment and comprises a radio frequency power amplifier, an attenuator, a logarithmic detector, a low-pass filter and a comparison and control signal generation module. The amplified radio frequency signal is input into the attenuator; the attenuator attenuates the signal so that the input radio frequency signal reaches a range suitable for detection of the logarithmic detector after attenuation; the logarithmic detector converts the radio-frequency signal into a direct-current voltage proportional to the signal power; voltage signals of direct-current voltage output by the logarithmic detector are smoothed through a low-pass filter, and rapidly changing components are removed; and the comparison and control signal generation module compares the smoothed voltage with a reference voltage, generates a control signal for adjusting the gain, and adjusts the gain. According to the invention, instant gain adjustment is provided under the condition of rapidly changing signals, and the energy efficiency of the system is improved.

The invention relates to the technical field of gas ultrasonic flow meters, in particular to a flow integrating system based on a gas ultrasonic flow meter. The system comprises a data acquisition unit which acquires and stores data based on an acquisition and storage module; the ultrasonic transduction unit converts sound energy into an ultrasonic signal through an ultrasonic transducer based on the data acquired by the data acquisition unit; the flow measuring unit is used for driving a transducer, amplifying the ultrasonic signal and carrying out filtering and operation processing on the basis of the ultrasonic signal converted by the ultrasonic transduction unit; the flow integrating unit collects instantaneous flow, temperature and pressure data according to the operation processing result of the flow measuring unit, calculates the optimal compression factor, calculates the working condition accumulated flow, the standard condition instantaneous flow and the standard condition accumulated flow, and displays the values through a liquid crystal display screen. Through signal amplification, filtering and automatic gain control, noise and interference are effectively removed, and the signal quality and the signal-to-noise ratio are improved.

The invention discloses a chromaticity automatic gain control method and device for a composite video signal, and belongs to the technical field of signal processing, and the method comprises the steps: obtaining a chromaticity signal adjusted by a historical chromaticity gain parameter, and demodulating the chromaticity signal from the chromaticity signal to obtain a chromaticity component reference value of a color synchronization signal; calculating an actual color synchronization level and a phase deviation between an input color subcarrier and a local color subcarrier according to the color difference component reference value; in response to the chroma phase deviation meeting a preset chroma phase locking condition, generating a chroma phase locking identifier, and calculating a chroma gain error according to the actual color synchronization level; and determining a chrominance gain control stable identifier according to the chrominance gain error, and determining an output chrominance gain parameter based on the chrominance gain control stable identifier, the chrominance phase locking identifier and the chrominance gain error so as to dynamically adjust the next line of gain through closed-loop control. According to the invention, the influence of long-distance cable transmission on the composite video chrominance signal can be reduced, and the chrominance difference of different transmission distances is reduced.

The invention provides an automatic gain control method and circuit of an ultrasonic flow metering device, and aims to improve the accuracy and stability of flow metering. According to the method, the gain is automatically adjusted by measuring the pulse width of an echo signal and comparing the pulse width with an expected value. The circuit comprises a transmitting circuit, an ultrasonic transducer, a variable gain amplifier, a variable threshold comparator, a zero-crossing comparator, a flight time measuring unit, a pulse width measuring unit, a time-to-digital converter and a calculation and control unit. According to the scheme, independent gain configuration of uplink and downlink flight time and a fine gain adjustment strategy based on echo amplitude change can be realized. In addition, by setting the allowable maximum pulse width change value, whether the measurement error is within a reasonable range can be automatically judged, and re-measurement can be carried out when necessary. According to the integrated design scheme, the flexibility and the response speed of measurement are improved, the signal processing flow is optimized, and an innovative solution is provided for ultrasonic flow metering.

The invention discloses an energy storage cross-regional cooperation AGC optimization control method and equipment considering conditional SOC equalization, and the method comprises the steps: firstly evaluating the equivalent charge state and dynamic frequency modulation capability of an energy storage system in each region in real time, and judging whether a cross-regional cooperation condition is satisfied or not; if yes, a multi-objective optimization model is established, and the model takes a plurality of objective functions as optimization objectives, including enabling the equivalent state of charge to be balanced, minimizing inter-region tie line transmission power and maximizing the residual frequency modulation capability, and meanwhile, takes power grid operation parameters as constraint conditions. And by solving the model, obtaining an optimal output instruction of the energy storage system in each region in the next AGC control period, and issuing the optimal output instruction to the corresponding energy storage system for execution. The invention aims to support other regions through the tie line when the frequency modulation margin of the energy storage system in the interconnected region is sufficient, avoid frequency fluctuation caused by over-limit of the energy storage SOC and insufficient frequency modulation of a thermal power generating unit, improve the safety and reliability of energy storage frequency modulation, effectively stabilize the frequency fluctuation of a power grid, and enhance the anti-disturbance capability of a power system.

This disclosure describes systems, methods, and devices for secondary cell activation. A device may decode a medium access control (MAC) control element received from a network node, the MAC control element including a request to activate a secondary cell (SCell); perform receiver beam sweeping using a beam sweeping factor less than eight in a frequency range prior to activating the SCell, the receiver beam sweeping including: automatic gain control using the beam sweeping factor; and searching for the SCell using the beam sweeping factor; encode a reference signal received power (RSRP) report to be transmitted, the RSRP report including a synchronization signal block (SSB) prior to activating the SCell; perform a channel status information measurement prior to activating the SCell; encode a report indicative of the channel status information measurement to be transmitted prior to activating the SCell; and activate the SCell.

The present disclosure provides a method for transmitting and receiving a sidelink positioning reference signal and a terminal. The method includes: when a resource occupied by the sidelink positioning reference signal collides with a resource occupied by at least one type of information in a first information set, not transmitting the S-PRS on the collided resource, wherein the first information set includes: at least one of a sidelink physical channel, a sidelink reference signal, a sidelink synchronization signal, a sidelink synchronization signal block, an automatic gain control information and a guard period information.

A demodulation circuit includes a slope detector circuit and a comparator circuit. The slope detector circuit is configured detect a change in the voltage and determine if the voltage rate of change meets or exceeds one of a rise threshold or a fall threshold. The comparator circuit is configured to set an upper limit and lower limit for rate of change, compare the voltage rate of change to the limits, determine that the voltage rate of change meets or exceeds the limits, if the voltage rate of change meets or exceeds the rising and falling rate of change limits, (v) set a lower limit for a falling rate of change, (vi) receive the voltage rate of change and determine that the voltage rate of change meets or exceeds the fall or rise threshold, if the voltage rate of change meets or exceeds the falling or rising rate of change.

The invention discloses a digital measurement and control circuit of a resonant accelerometer based on an orthogonal phase-locked loop. Comprising an FPGA core board, an ADC / DAC board card and a gauge outfit analog interface board, and the high-precision resonant accelerometer is driven and detected through digital closed-loop control. The implementation method comprises the following steps: after capacitance / voltage conversion, modulation and demodulation and filtering, a resonator displacement signal is acquired by a high-precision ADC and input into an FPGA, a driving signal generated by the FPGA through an orthogonal phase-locked loop and an automatic gain control module is output through a DAC, and the driving signal is applied to a resonator driving end after shunt superposition of a direct current quantity. The digital quadrature phase-locked loop is adopted to replace a traditional phase-locked loop, the contradiction between dynamic response and noise suppression is solved, and the digital quadrature phase-locked loop has the advantages of being high in phase control precision, wide in capture bandwidth, high in anti-interference performance and excellent in compatibility.

Various solutions for synchronization signal block (SSB) -less secondary cell (SCell) operations in carrier aggregation (CA) are described. An apparatus may receive an SCell configuration from a primary cell (PCell). The SCell configuration may indicate an SCell operating without an SSB. The apparatus may also receive a signaling from the PCell. The signaling may indicate an activation of the first SCell. Then, the apparatus may determine a reference cell to provide a timing reference and an automatic gain control (AGC) source for the first SCell.

The invention relates to the technical field of new energy power generation control, and discloses a frequency modulation control and online monitoring system, which comprises an AGC (Automatic Gain Control) system for realizing automatic gain control to stabilize the signal transmission quality of the system, and an FPGA (Field Programmable Gate Array) functional module for high-speed data acquisition and logical operation processing, and the CPU processing module is used for overall planning of data analysis, instruction generation and system cooperative control. According to the invention, the FPGA + CPU hardware architecture is adopted, so that the precision requirement of power grid frequency sampling can be ensured, and the precision of the calculated grid-connected point power information can be ensured, thereby obtaining the high-precision power adjusting quantity, adjusting the new energy station according to the power adjusting quantity, and carrying out real-time adjustment control on the new energy station. The requirement for primary frequency modulation of the new energy station is met, and the operation stability of the new energy station is effectively improved.

The present invention relates to a simple VHF frequency band channel transceiver, belonging to the technical field of very high frequency transceivers. It is composed of a device box and a circuit board. The device box is composed of a shell, a cover plate and a shielding cavity. The receiving / transmitting channel module installed on the circuit board contains a receiving circuit, a transmitting circuit and a power supply circuit; the receiving circuit is composed of a low-noise amplifier frequency selection, mixing, intermediate frequency amplification, intermediate frequency crystal filtering, automatic gain control, receiving demodulation and receiving frequency synthesis circuit; the transmitting circuit is composed of a transmitting frequency synthesis, a transmitting pre-stage drive amplifier, a transmitting post-stage drive amplifier and a power detection circuit; a plurality of shielding cavities are milled in the shell and the cover plate, and the shielding cavities are respectively equipped with individual module circuits of the receiving circuit and the transmitting circuit, and the shell and the cover plate are sealed and shielded for the circuit board. The integrated design of the transceiver channel machine and the radio frequency carrier 4FSK digital signal modulation are realized. The receiving intermediate frequency, image frequency, intermodulation and spurious response indicators are excellent, the multi-channel operation has no crosstalk, the analog sensitivity is high, the volume is small, the noise is small, the harmonic spurious suppression is high, and the receiving dynamic range is large.

The invention provides an unmanned aerial vehicle electromagnetic interference positioning method and system, and relates to the technical field of unmanned aerial vehicles, and the method comprises the steps: 1, carrying out the broadband frequency spectrum scanning of a remote control link frequency band, a telemetering link frequency band and an image transmission frequency band at the full flight stage of an unmanned aerial vehicle, detecting an interference signal in a frequency hopping communication system in real time, and transmitting the interference signal to an unmanned aerial vehicle; identifying random hopping frequency conversion points covered by the interference signals to form a hopping frequency conversion point set; and step 2, inputting the hopping frequency point set into a radio frequency sharing front end, coupling a radio frequency signal of a communication antenna to a spectrum analysis unit through a duplexer, and performing signal compensation on a coupling path by utilizing automatic gain control and a phase equalizer to obtain corrected interference spectrum data. The anti-interference capability and the flight safety of the unmanned aerial vehicle in a complex electromagnetic environment are improved, and the avoidance path is generated to guarantee the safe flight of the unmanned aerial vehicle.

The invention discloses a front-end reading circuit suitable for a high-purity germanium detector. The front-end reading circuit comprises a pre-amplifier, a filtering shaping circuit, an amplitude acquisition channel, a time discrimination channel and an automatic gain control circuit, the output end of the pre-amplifier is connected with the filtering and shaping circuit, the output end of the filtering and shaping circuit is connected with the amplitude acquisition channel and the time discrimination channel, and the output of the amplitude acquisition channel is input into an ADC module of the digital amplitude analyzer; the time discrimination channel is used for extracting time information of particles reaching the detector, and an obtained pulse signal is used as a control signal of the amplitude acquisition channel and is also input to the TDC module of the digital amplitude analyzer; a control signal of the automatic gain control circuit is generated by the external processor according to the output of the digital amplitude analyzer, and an output signal of the automatic gain control circuit is used as a control signal of the preamplifier. The advantages of the detector can be fully utilized, and resource waste is avoided.

A sidelink transmission beam scan may be performed; performing sidelink by transmitting a first portion of a symbol at a first transmission power using a wide beam at the start of the slot during a sidelink transmission slot comprising a plurality of symbols and transmitting two or more second portions of the symbol at a second transmission power using two or more narrow beams after the first portion The transmission beam is scanned, one second portion per narrow beam, and a second transmission power is determined based on a gain difference between the wide beam and the narrow beam. The first portion includes at least one or more symbols for automatic gain control in one or more receiving devices, and the second portions include at least reference signals, one reference signal per second portion.

The present invention relates to a power control method and apparatus, a repeater, and a storage medium. The method comprises: acquiring a gain control parameter for performing automatic gain control on a baseband signal; identifying a target time slot type corresponding to the baseband signal; on the basis of the target time slot type, determining a power statistical duration corresponding to the target time slot type; acquiring a power statistical value of the baseband signal within the power statistical duration; and performing power control on the signal on the basis of the power statistical value and the gain control parameter.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine an automatic gain control parameter, for a group of downlink symbols associated with a base station, based at least in part on an automatic gain control resource included in the group of downlink symbols. The user equipment may perform, based at least in part on the automatic gain control parameter, automatic gain control for one or more data symbols included in the group of downlink symbols. Numerous other aspects are provided.

Aspects of the disclosure relate to an audio hub that may be connected to a computing device. The audio hub may comprise multiple wired and wireless communication interfaces that may be used to interface multiple peripheral audio devices with the computing device. The audio hub may comprise a built-in reference microphone that may be used for noise cancelation, automatic gain control, and / or acoustic echo cancelation. The audio hub may additionally be configured for audio dosimetry measurements based on output audio signals as sent to an audio output device connected to the audio hub.