32 results about "Analog transmission" patented technology

A transmitter includes an analog transmission circuit, a power amplifier, a voltage detector, a comparator, and a control circuit. The analog transmission circuit is configured to provide a first gain to a first analog signal, so as to generate a second analog signal. The power amplifier is configured to provide a second gain to the second analog signal, so as to generate an output signal to an antenna. The voltage detector is configured to detect a voltage level of the second analog signal. The comparator is configured to generate an indication signal according to the voltage level and a reference level. The control circuit is configured to adjust the first gain of the analog transmission circuit according to the indication signal.

The invention relates to the technical field of integrated circuits, and discloses an analog signal selector and a channel configuration method and a safety protection circuit thereof, applied to the analog signal selector, the analog signal selector comprises N analog transmission gates, the safety protection circuit comprises N protection units, each protection unit corresponds to one analog transmission gate, each protection unit comprises a logic detection module, wherein the input end of the logic detection module is coupled to other N-1 enable signals except the enable signal corresponding to the logic detection module; the input end of the delay module is coupled to the output end of the logic detection module, and the delay module is configured to delay the rising edge of the input signal and keep the falling edge transparent; the first input end of the logic output module is coupled to an enable signal corresponding to the logic output module, the second input end of the logic output module is coupled to the output end of the time delay module, and the output end of the logic output module outputs a safety enable signal to a corresponding analog transmission gate.

The present disclosure provides approaches for determining retransmission criteria in a wireless communication system, with particular interest in analog transmission systems. The proposed methods and apparatuses improve the efficiency and accuracy of information transmission by using criteria such as signal quality, distortion metric, or cyclic redundancy check to determine whether to request or perform retransmission of an analog decoded signal. Thus, methods are provided that enable wireless communication to be performed at both a first wireless device (transmitter) and a second wireless device (receiver), which involves the transmitter transmitting an analog decoded signal to the receiver, and the receiver determining a retransmission criterion based on the received signal and sending feedback to the transmitter. The feedback can be a non-acknowledgement or acknowledgement determined based on the aforementioned criteria, or the feedback can be the criterion itself. In response to the feedback, the transmitter determines whether to transmit a retransmission of the analog decoded signal.

The invention relates to the technical field of satellite communication, and discloses a remote plasma generator radio frequency energy efficient transmission method. The method comprises the following steps: firstly, collecting plasma energy coupling characteristic data and impedance-medium matching parameter data, constructing a training data set, and training an energy coupling prediction model by using a gradient boosting tree algorithm; predicting transmission energy of different coupling configurations by using a model, and screening an optimal configuration by taking maximization of transmission efficiency as a target; simulating a transmission process based on the optimal configuration, and analyzing energy migration and coupling behaviors of each frequency to obtain path simulation data; and finally, according to transmission targets such as a generator structure parameter target and a transmission threshold target, a migration coupling path is optimized, and an efficient transmission scheme is obtained. According to the method, the transmission energy can be accurately predicted, the optimal configuration is screened, the transmission path is optimized, and the radio frequency energy transmission efficiency is improved.

The invention discloses a high-speed channel signal integrity chip evaluation method and system, and the method comprises the steps: generating an excitation signal containing a plurality of frequency components and different amplitudes, and enabling the excitation signal to be used for simulating a complex signal scene in actual high-speed communication; inputting the excitation signal to a transmitting end of a to-be-evaluated signal integrity chip, and obtaining an actual transmitting signal output by the transmitting end of the chip; the actual transmitting signal is analyzed, characteristic parameters of the transmitting signal are obtained, and the characteristic parameters comprise overshoot, undershoot, rise time and fall time of the signal and spectrum distribution of the signal; the transmission process of the signal in different transmission environments is simulated through the transmission line model, the actual transmitting signal is input into the transmission line model to obtain the signal after simulation transmission, and the complex signal scene in actual high-speed communication can be simulated more truly by generating the excitation signal containing multiple frequency components and different amplitudes, so that the signal transmission efficiency is improved. Therefore, the signal integrity chip can be evaluated more comprehensively and accurately.

The invention belongs to the field of optical fiber communication, and discloses a dispersion simulation transmission link based on analog signal processing and a dispersion simulation method, and the dispersion simulation transmission link comprises a coherent transmitter, an IQ modulator, lasers with different wavelengths, a coherent receiving chip (ICR), a Bragg dispersion compensation grating (FBG-DCM) and a coherent receiver. Data is sent out from a coherent transmitter, firstly passes through an ICR, a light field is converted into an electric field, and the electric field is modulated into a new light field by an IQ modulator. Two paths can be selected at the output end of the ICR, the first path is connected to the IQ modulator and is subjected to secondary emission by utilizing intrinsic light with different wavelengths, the wavelength can be converted to an FBG-DCM compensation window, and after the steps, the ICR is used for receiving and then is converted to the original wavelength by utilizing the IQ modulator to be sent, so that the superposition of negative dispersion is realized; and the second path is connected to the IQ modulator, secondary emission is carried out by utilizing intrinsic light with different wavelengths, phase conjugation is realized, meanwhile, conversion to an FBG-DCM compensation window is realized, and superposition of positive dispersion is realized through the above steps after ICR receiving.

The invention discloses an urban rail vehicle early warning model verification system which comprises a hardware level and a software level, the hardware level comprises a vehicle-ground wireless host and a data simulation terminal, the vehicle-ground wireless host supports a communication system protocol and is used for establishing a data transmission channel with an urban rail vehicle through a protocol port, and the data simulation terminal is used for simulating the data transmission channel. The data simulation terminal transmits MVB control network data and Ethernet train maintenance network data based on the data transmission channel; and the software level completes early warning model verification according to the MVB control network data, the Ethernet train maintenance network data and the time variable. The vehicle-ground wireless host is adopted to realize data transmission and ground connection based on a communication protocol, related data can be simulated and transmitted, a sensor does not need to be disassembled, and the verification efficiency is improved. A lot of time and manpower are saved. Moreover, through a software-level early warning model verification function and in combination with a hardware-level data transmission channel, the model can be conveniently subjected to iterative verification for many times.

The invention relates to a method for accurately regulating and controlling twisting spacing fluctuation in a data line manufacturing process in the field of a new generation of information technology industry, which comprises the following steps of: according to updated equipment control state data, simulating a test scene of signal transmission stability aiming at a high-frequency environment adaptation requirement, acquiring delay difference data in a simulation transmission process, and calculating the twisting spacing fluctuation of the data line according to the delay difference data; judging whether the delay difference is within a preset threshold range or not; if the delay difference data exceeds a preset threshold range, performing deep analysis on the delay difference data through a signal transmission stability analysis module, obtaining specific distribution characteristics of difference sources, and determining main factors causing transmission performance inconsistency; according to the specific distribution characteristics of the difference sources, key parameters in the dynamic regulation and control instruction set are adjusted according to the transmission performance consistency problem, an adjusted twisting spacing control scheme is obtained, and final equipment operation configuration data are output.

The application provides a kind of analog signal conditioning circuit and radar signal simulator system, wherein the analog signal conditioning circuit includes signal receiving unit, for receiving target signal;Down conversion unit, for by down conversion mixer, target signal is down converted from first frequency range to second frequency range;Analog transmission unit, for the target signal through radio frequency cable is divided into two target sub signals;Up conversion unit, for by up conversion mixer, target sub signal after adjusting signal intensity is up converted to first frequency range;Signal transmitting unit, for two target sub signals are combined into one mixed signal;Wherein the input frequency of the local oscillator signal of down conversion mixer and each up conversion mixer is derived from the output frequency of the corresponding set phase-locked loop, and the reference frequency of several phase-locked loops is derived from the same reference source, so that different echo intensity and different distance of micro-motion target are simulated, and the reliability of radar detection is improved.

The application discloses a kind of self-routing planning method, device and system of electric power elastic optical network, when detecting that service request arrives, obtain all available routing data and all available frequency slot data of physical network layer, generate all routing planning scheme corresponding to the service request, calculate the preference value of each routing planning scheme, based on the first routing planning scheme corresponding to the maximum preference value, simulate transmission to service request, calculate the first route and frequency slot selection indicator variable of service request and first learning reward value;Based on the first route and frequency slot selection indicator variable, calculate and update the preference value of the first routing planning scheme based on the first learning reward sample mean value;Based on the first learning reward value, when the successful transmission indicator variable is 1, the first routing planning scheme is determined as the optimal routing planning scheme corresponding to service request, and is issued to physical network layer;Compared with prior art, the application can realize the self-planning of network routing and spectrum.

Methods, systems, and devices for wireless communications are described. The described techniques may enable a transmitting device to retransmit an analog signal of real number values. In some aspects, the transmitting device may transmit a first portion of an encoded analog signal and may retransmit one or more additional portions of the encoded analog signal. A receiving device may decode an aggregation of the first portion and the one or more additional portions of the encoded wireless signal. The transmitting device may transmit a first encoded signal and a second encoded signal. The second encoded signal may be encoded based on a dimension of a source signal and a dimension of the first encoded signal. The second encoded signal may be rotated and encoded from the source signal. The transmitting device may transmit the encoded signals such that the receiving device may decode an aggregation of the encoded signals.

A method and system are disclosed for communicating using both analog and digital transmissions on the same bandwidth. The method may include receiving a digital transmission and an analog transmission using a same / shared bandwidth. The method may include playing a digital audio of the digital transmission and an analog audio of the analog transmission using a same audio output. The digital transmission may include an identification code. The playing of the digital audio may include selectively playing the digital audio based on a match of the identification code with a stored identification code of the system and selectively squelching the digital audio based on a mismatch of the identification code with the stored identification code.

The invention discloses a virtual node construction and simulation method in a semi-physical simulation platform, which relates to the technical field of computer simulation and comprises a container server, a software radio baseband board and a simulation transmission end. A container server, a software radio baseband board and a simulation transmission end are used for constructing virtual nodes to form a virtual node simulation environment, a container is used for deploying partial waveform components such as a network layer and the like with low real-time requirements, a software radio baseband processing board is used for deploying partial waveform components such as a waveform MAC and the like with high real-time requirements, and the virtual node simulation environment is formed. Therefore, accurate simulation of the waveform is carried out.

The application discloses a display device and an electronic equipment. The display device comprises a gamma circuit, at least one data driving circuit, at least one real transmission line, an analog transmission line and a compensation circuit. The impedance of the real transmission line is proportionally equivalent to the analog transmission line by adding the analog transmission line. The compensation circuit can determine the voltage drop loss compensation value of the real transmission line, and compensate the potential of the initial gamma reference voltage signal with the voltage drop loss compensation value, so that the target gamma reference voltage signal received by the data driving circuit is the same as the initial gamma reference voltage signal output by the gamma circuit.

An optical communication method, a transmitter, a receiver and an optical communication device, the optical communication method comprising: acquiring a to-be-transmitted sequence, dividing the to-be-transmitted sequence into a digital direct transmission group and an analog transmission group according to bit weight, the bit weight of the digital direct transmission group being greater than the bit weight of the analog transmission group; performing digital-to-analog conversion on a to-be-sent sequence of the analog transmission group to obtain a first analog electric signal, and performing electro-optical modulation on the first analog electric signal to obtain a first analog optical signal; performing electro-optical conversion on the to-be-sent sequence of the digital direct transmission group to obtain a digital optical signal; and multiplexing the first analog optical signal and the digital optical signal into one optical signal for transmission.

The invention discloses a method for carrying out digital communication on a two-wire system 4-20mA current loop, which belongs to the technical field of digital communication, and comprises the following steps of: in downlink transmission, regulating a digital signal of an upper computer into a 10-24V power supply modulation signal by a transmitter amplifier, and transmitting the 10-24V power supply modulation signal to a sensor for partial pressure reduction through the current loop; uplink transmission controls a modulation resistor to output a signal through a microcontroller, a current loop controller is driven to generate 0-9 mA current variation, and the 0-9 mA current variation is restored through a transmitter sampling comparator; the dual-mode switching is cooperatively controlled by the microcontroller; in a digital mode, TX output / DAC is zeroed; and in an analog mode, TX high resistance / DAC outputs analog voltage. Power supply voltage transmission downlink signals and modulation current transmission uplink signals are multiplexed, digital communication is realized at ultra-low cost, analog transmission is compatible, the rate is multiplied by that of a traditional protocol, and the system is suitable for industrial sensor remote management scenes.

A radar transceiver for radar signals, having a frequency-selective radar transmitting unit and / or a frequency-selective radar receiving unit, the frequency-selective radar transmitting unit comprising: a digital-to-analog converter for converting broadband digital signals provided for all transmitting channels into analog transmitting signals, a signal modulator that modulates a signal carrier by means of an analog transmission signal output by the digital-to-analog converter to generate a modulated transmission signal, at least one frequency selective component that distributes the transmission signal modulated by the signal modulator to a plurality of transmission channels as radar signal radiation; the frequency-selective radar receiving unit comprises at least one frequency-selective component for combining a received radar signal comprising a plurality of receiving channels, a signal demodulator for demodulating the radar signal combined by the frequency-selective component by means of a signal carrier to produce a demodulated received signal, and at least one analog-to-digital converter that samples the received signal demodulated by the signal demodulator to generate a digital received signal.

The present application provides a control method, device, electronic device, readable storage medium, and transmission system for a transmission system. The control method includes: in response to cargo entering a security inspection system, generating simulated cargo on a pre-created simulation system of a transmission system on a human-machine interface and encoding the simulated cargo, wherein the simulation system includes multiple simulated transmission devices corresponding to the multiple transmission devices; updating the position information of the simulated cargo corresponding to the cargo on the simulation system based on the positioning information of the cargo by the transmission system, wherein the position information includes the simulated transmission device where the simulated cargo is located; and when the transmission of the cargo in the transmission system stops, controlling the movement of the transmission device corresponding to the simulated transmission device in the position information based on the position information of the simulated cargo corresponding to the cargo to complete the transmission of the cargo in the transmission system. The control method has the advantages of ensuring personnel safety, equipment safety, and saving manpower.

A one-way data link analog transmission device includes an intermediate frequency (IF) signal unit, a frequency synthesizer unit, a mixer unit, a radio frequency (RF) transmission unit, a local control unit, and a programmable network interface. Each unit is an independent module equipped with an electromagnetic compatibility (EMC) shielded shell, assembled into an integrated device with an aluminum alloy unibody package. The IF signal unit uses an FPGA+DAC architecture to generate IF modulation signals; the frequency synthesizer unit provides a highly stable local oscillator signal and clock reference; the mixer unit performs signal mixing to generate a pre-modulated signal; the RF transmission unit performs multi-stage processing to achieve RF signal up-conversion and high-precision amplitude control, and adopts adaptive power control. This invention features a pure one-way architecture, weighs less than 3 kg, has a deployment time of less than 5 minutes, can accurately reproduce the one-way command transmission characteristics in aviation equipment, has strong anti-interference capabilities, stable transmission, and is suitable for multiple scenarios such as airborne, field, and laboratory applications. Its cost is only 25% of the market standard target source, and it can be matched with various aviation equipment communication protocols, exhibiting excellent practicality and scalability.

The application relates to the technical field of integrated circuits, and discloses an analog signal selector, a channel configuration method thereof and a safety protection circuit, which are applied to the analog signal selector. The analog signal selector comprises N analog transmission gates, and the safety protection circuit comprises N protection units. Each protection unit corresponds to one analog transmission gate. Each protection unit comprises: a logic detection module, an input end of the logic detection module being coupled to N-1 enable signals except for the enable signal corresponding to the protection unit; a delay module, an input end of the delay module being coupled to an output end of the logic detection module, the delay module being configured to delay the rising edge of the input signal and keeping transparent to the falling edge; and a logic output module, a first input end of the logic output module being coupled to the enable signal corresponding to the protection unit, a second input end of the logic output module being coupled to an output end of the delay module, and an output end of the logic output module outputting a safety enable signal to the corresponding analog transmission gate.

Example implementations include a method, apparatus and computer-readable medium of wireless communication at a user equipment (UE), comprising receiving one or more configurations indicating transmission of gradient information using mapping information and a transmission type, wherein the transmission type indicates an analog transmission or a digital transmission of the gradient information and the gradient information is associated with training a global machine learning model. The implementations further include generating a signal including quantized gradient information based on the mapping information and a set of gradients, wherein the set of gradients is associated with the training of the global machine learning model with local training data at the UE. Additionally, the implementations further include transmitting the signal to a network entity via the analog transmission or the digital transmission based on the transmission type.

The application belongs to the field of optical fiber communication, and discloses a dispersion simulation transmission link and a dispersion simulation method based on analog signal processing. The dispersion simulation transmission link comprises a coherent transmitter, an IQ modulator, lasers with different wavelengths, an interference receiving chip (ICR), a Bragg dispersion compensation grating (FBG-DCM) and a coherent receiver. Data is sent from the coherent transmitter, first passes through the ICR to convert the optical field into the electrical domain, and is modulated into a new optical field by the IQ modulator. The output end of the ICR has two optional paths. The first path is connected to the IQ modulator, uses the secondary emission of intrinsic light with different wavelengths, and converts the wavelength to the FBG-DCM compensation window. After the above steps, the original wavelength is converted by the IQ modulator after being received by the ICR for transmission, so that the superposition of negative dispersion is realized. The second path is connected to the IQ modulator, uses the secondary emission of intrinsic light with different wavelengths, realizes the phase conjugation and converts to the FBG-DCM compensation window at the same time. After the above steps, the ICR receives and realizes the superposition of positive dispersion.

This application provides a physical transmission device and method based on a single-pair Ethernet sensor network, applied in the field of Ethernet communication technology. The method includes an airborne test bus master station, a single-pair Ethernet data transmission chain, and an airborne test bus slave station. The airborne test bus master station receives airborne test data acquisition signals and power supply signals sent by the single-pair Ethernet airborne test data acquisition module, and sequentially transmits these signals to the airborne test sensor module via the single-pair Ethernet data transmission chain and the airborne test bus slave station. The airborne test data acquisition signals instruct the airborne test sensor module to acquire sensing information related to airborne testing, and the power supply signals power the airborne test sensor module. The airborne test bus slave station receives the sensing information sent by the airborne test sensor module and sequentially transmits it to the single-pair Ethernet airborne test data acquisition module via the single-pair Ethernet data transmission chain and the airborne test bus master station. This method overcomes the inherent limitations of traditional analog transmission.

A radar transceiver device for radar signals with a frequency-selective radar transmitting unit and / or with a frequency-selective radar receiving unit. The frequency-selective radar transmitting unit has a digital-to-analog converter to convert a broadband digital signal provided for all transmission channels into an analog transmission signal, a signal modulator which modulates a signal carrier with the analog transmission signal emitted by the digital-to-analog converter, and at least one frequency-selective component to partition the transmission signal modulated by the signal modulator to a plurality of transmission channels for emission as a radar signal. The frequency-selective radar receiving unit includes a frequency-selective component to combine a received radar signal including a plurality of receive channels, a signal demodulator which demodulates the radar signal combined by the frequency-selective component using a signal carrier, and at least one analog-to-digital converter.

The embodiment of the invention provides a communication method and device and a storage medium. The method comprises the following steps: receiving first information from a plurality of terminals, wherein the first information indicates a first local parameter, a second local parameter and a third local parameter; obtaining an update step length according to the gradient noise total power and first information from the plurality of terminals; and respectively sending the updated global model or the updated step length to the plurality of terminals, wherein the updated global model is obtained by processing the global model according to the updated step length. The step length is dynamically adjusted according to the gradient noise and the training state indicated based on each local parameter, so that the gradient descent of neural network learning is accelerated, and the problems of slow neural network training and even non-convergence under the condition that the gradient has noise are solved; by accelerating the neural network training process, not only can the Green AI be realized, but also the communication overhead can be saved, and the scheme can be compatible with digital transmission, analog transmission and air aggregation of federated learning.

The invention provides a physical transmission device and method based on a single-pair Ethernet sensor network, and is applied to the technical field of Ethernet communication. The method comprises an airborne test bus master station, a single-pair Ethernet data transmission chain and an airborne test bus slave station. The airborne test bus master station receives an airborne test data acquisition signal and a power supply signal sent by the single-pair Ethernet airborne test data acquisition module, and the airborne test bus slave station sequentially sends the airborne test data acquisition signal and the power supply signal to the airborne test sensor module through the single-pair Ethernet data transmission chain; the airborne test data acquisition signal is used for indicating the airborne test sensor module to acquire sensing information related to airborne test, and the power supply signal is used for supplying power to the airborne test sensor module; the airborne test bus slave station receives sensing information sent by the airborne test sensor module, and the airborne test bus master station sequentially sends the sensing information to the single-pair Ethernet airborne test data acquisition module through the single-pair Ethernet data transmission chain. The inherent limitation of traditional analog transmission is broken through.

An optical communication method, a transmitter, a receiver, and an optical communication apparatus. The optical communication method comprises: acquiring sequences to be sent, and classifying the sequences to be sent into a digital direct transmission group and an analog transmission group according to bit significance, wherein the bit significance of the digital direct transmission group is greater than the bit significance of the analog transmission group; performing digital-to-analog conversion on sequences to be sent in the analog transmission group to obtain a first analog electrical signal, and performing electro-optical modulation on the first analog electrical signal to obtain a first analog optical signal; and performing electro-optical conversion on sequences to be sent in the digital direct transmission group to obtain a digital optical signal; and multiplexing the first analog optical signal and the digital optical signal into one optical signal for transmission.

The application discloses a microphone system, a sound pickup panel and an audio processing method, and belongs to the technical field of audio. The microphone system comprises at least one sound pickup panel, a first host and a transmission cable connected between the sound pickup panel and the first host. Through the technical scheme, on the one hand, the sound pickup panel can be independently arranged at a sound pickup position according to a use scene, and the first host can be arranged at another position, for example, the first host can be hidden, thereby achieving a layout suitable for a complex environment. On the other hand, through physical separation, the sound pickup panel converts the picked-up audio signal into a standard network signal and then transmits the standard network signal to the first host through the transmission cable, the first host processes the standard network signal to obtain an output signal, thereby effectively avoiding distortion and attenuation of the audio signal caused by interference in long-distance analog transmission, and improving the stability and fidelity of audio transmission.

Methods, systems, and devices for wireless communication are described. The described techniques may enable a transmitting device to retransmit a real-numeric analog signal. In some aspects, a transmitting device may transmit a first portion of an encoded analog signal, and may retransmit one or more additional portions of the encoded analog signal. The receiving device may decode an aggregation of the first portion and the one or more additional portions of the encoded wireless signal. The transmitting device may transmit the first encoded signal and the second encoded signal. The second encoded signal may be encoded based on the dimension of the source signal and the dimension of the first encoded signal. The second coded signal can be obtained by rotating and coding the source signal. The transmitting device may transmit the encoded signal such that the receiving device may decode an aggregation of the encoded signal.