57 results about "Analog transmission" patented technology

The invention provides a timing synchronization recovery system based on a Gardner algorithm, relates to the technical field of signal processing, and is used for solving the problem that in the prior art, in long-distance communication, due to the fact that signals are affected by noise and errors caused by factors such as atmospheric turbulence and Doppler effect in the transmission process, the transmission efficiency of the signals is improved. And complete synchronization of the clock, the phase and the frequency is difficult to guarantee. The system comprises a signal sending end used for generating a random binary signal and modulating the binary signal into a simulation signal suitable for transmission, and the simulation signal is used for simulating transmitted bit data; the channel is used for transmitting the simulation signal and introducing noise in the transmission process to carry out simulation interference on the simulation signal to obtain a distortion signal; and the signal receiving end is used for receiving the distorted signal, performing timing synchronization and interpolation processing on a symbol of the distorted signal by using a Gardner loop, correcting a sampling deviation introduced by a channel, and recovering original bit data from the distorted signal.

This disclosure provides approaches for determining retransmission criteria in wireless communication systems, particularly focusing on analog transmission systems. The proposed methods and apparatuses improve the efficiency and accuracy of information transmission by using criteria such as signal quality, distortion metrics, or cyclic redundancy checks to determine whether to request or perform retransmission of an analog coded signal. Methods of wireless communication performable at both a first wireless device (transmitter) and a second wireless device (receiver) are accordingly provided which involve the transmitter sending an analog coded signal to the receiver, and the receiver determining retransmission criteria based on the received signal and transmitting feedback to the transmitter. The feedback may be a non-acknowledgement or an acknowledgment determined based on the aforementioned criteria, or the feedback may be the criteria itself. In response to the feedback, the transmitter determines whether to send a retransmission of the analog coded signal.

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.

An AP / PCP may perform user selection / pairing / grouping based on a measurement of an analog transmission (e.g., signal to noise ratio (SNR) or signal to interference plus noise ratio (SINR)). The SNRs may be used, for example by the station, to determine best beams and / or beam pairs and / or worst beams and / or beam pairs. A station may feed back the best few beams and / or beam pairs for a Tx and Rx virtual antenna pair. A station may feed back the worst few beams for the Tx and Rx virtual antenna pair. The AP / PCP may receive the indication(s) and / or use the indication(s) to group the stations.

The invention relates to the technical field of network planning, in particular to a communication equipment wire harness path optimization system based on 5G base station distribution data, which comprises the following steps: receiving base station distribution data and signal frequency characteristics, establishing a dielectric constant gradient analysis model, calculating the optimal dielectric constant distribution of a wire harness insulating layer, and generating an impedance distribution matrix; calculating electromagnetic field intensity distribution of each layer based on the impedance distribution matrix to obtain a structure parameter set, establishing a comprehensive transmission loss prediction model, calculating a weight coefficient of each transmission path in combination with base station distribution data, and obtaining a dynamic path priority and a power distribution scheme; updating the network topology analysis unit based on the base station distribution data, simulating a preset base station signal change, obtaining the dynamic path priority and the robustness of a power distribution scheme in different network states, and outputting analog transmission performance data; therefore, the adaptive capacity of the system to burst network changes is improved, and signal degradation caused by path interference and load concentration is also remarkably reduced.

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 present invention addresses the problem of providing a video signal transmission device, a video signal relay device, and a video signal transmission / reception system in which image quality degradation is suppressed when analog transmission is performed on a video signal acquired by an imaging element. A video signal transmission device includes: a YC conversion unit into which RAW data output from an imaging element by performing imaging is inputted, and which converts the RAW data into YC data including luminance data, first color difference data, and second color difference data and outputs the YC data; a digital-to-analog conversion unit that converts the YC data output from the YC conversion unit into an analog signal and outputs the analog signal; and an analog transmission unit that transmits the analog signal converted by the digital-analog conversion unit to the outside.

Methods, systems, and devices for wireless communications are described. In some examples, a wireless device may transmit a sidelink control message allocating sidelink resources for transmission of data associated with a data source. In such examples, the wireless device may allocate a first subset of the sidelink resources for transmission of a digital representation of a first portion of the data (e.g., a digital transmission) and allocate a second subset of the sidelink resources for transmission of an analog representation of a residual portion of the data (e.g., an analog transmission). Based on allocating the sidelink resources, the wireless device may transmit, via the first subset of the sidelink resources, a first signal including the digital representation of the first portion of the data and also transmit, via the second subset of the sidelink resources, a second signal including the analog representation of the residual portion of the data.

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 discloses a serial tunable attenuator integrated circuit for simulating channel characteristics, and belongs to the field of radio frequency integrated circuits. The circuit is composed of five attenuation units connected in series and a digital control module, the five attenuation units are the same in structure and can well simulate the attenuation characteristic of a transmission line, and attenuation values of the five attenuation units at the designed frequency can be distributed in a binary mode by setting different device values. And the digital control module realizes 32 different attenuation value combinations by controlling the working states of the five attenuation units. According to the invention, the problems of high-frequency insertion loss and return loss deterioration caused by parallel branch parasitism and gear adjustment of an existing parallel structure attenuator are avoided, attenuation characteristics of a channel can be well simulated in a wide frequency range, transmission lines with different lengths in SerDes test can be replaced, manual switching between the transmission lines with different lengths is not needed during test, and the test efficiency is improved. And the digital control module is used for realizing attenuation value switching, so that automatic testing can be realized, and the testing efficiency is improved.

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.

A method of operating a captioned telephone comprising the steps of dialing a telephone number to a relay gateway, connecting to the gateway over a communication network, performing a test to assess communication network quality, based on the test results, setting up the captioned telephone to operate in at least one of a first mode and a second mode wherein each of the first and second modes is one of (i) a PSTN mode in which data is communicated between the captioned telephone and the relay gateway via analog transmission and (ii) an IP mode in which data is communicated between the captioned telephone and the relay gateway via the Internet.

A low voltage drive circuit includes a transmit digital to analog circuit that converts transmit digital data into analog outbound data by: generating a DC component; generating a first oscillation at a first frequency; generating a second oscillation at the first frequency; and outputting the first oscillation or the second oscillation on a bit-by-bit basis in accordance with the transmit digital data to produce an oscillating component, wherein the DC component is combined with the oscillating component to produce the analog outbound data, and wherein the oscillating component and the DC component are combined to produce the analog outbound data. A drive sense circuit drives an analog transmit signal onto a bus, wherein the analog outbound data is represented within the analog transmit signal as variances in loading of the bus at the first frequency and wherein analog inbound data is represented within an analog receive signal as variances in loading of the bus at a second frequency.

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.

The invention discloses an emergency scheduling method based on analog transmission and enhanced coding and decoding algorithms, which comprises the following steps of: arranging a central processing platform for receiving and distributing audio and video signals in a central command room, acquiring audio signals from each emergency communication node, coding the audio signals into network streaming media audio signals, and transmitting the network streaming media audio signals to the central command room; the audio processing module is used for transmitting to a central processing platform of a central command room through a network link; collecting video signals from each emergency communication node, and encoding the video signals into network streaming media video signals; transmitting the compressed digital signal to a central processing platform through an emergency communication network; performing secondary editing on the central processing platform; and at the target emergency communication node, decoding the received digital signal by using a central processing platform enhanced coding and decoding algorithm, and restoring the digital signal into an analog signal. According to the invention, efficient transmission and control of multi-type multimedia signals are realized through network coding and enhanced coding and decoding algorithms, and real-time transmission and multi-point interaction of information are ensured.

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.

Embodiments of the present application provide a communication method and apparatus, and a storage medium. The method comprises: receiving first information from multiple terminals, wherein the first information indicates a first local parameter, a second local parameter, and a third local parameter; on the basis of the total power of gradient noise and the first information from the multiple terminals, obtaining an update step size; and sending an updated global model or the update step size to the multiple terminals, respectively, wherein the updated global model is obtained by processing the global model on the basis of the update step size. The step size is dynamically adjusted on the basis of the gradient noise and a training state indicated by each local parameter, thus accelerating the gradient descent of neural network learning, and solving the problem of slow neural network training or even non-convergence in the presence of gradient noise. By accelerating the neural network training process, "Green AI" can be achieved, and the communication overhead can be saved. The present solution can be compatible with digital transmission of federated learning, analog transmission, and over-the-air aggregation.

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.

The invention discloses a neural network parameter transmission method based on hybrid digital-analog and a related device, and the method comprises the steps: carrying out the blocking of a target neural network parameter, and obtaining a first parameter block group; calculating importance indexes of parameter blocks of the first parameter block group; starting from the parameter block with the maximum importance index, calculating the performance loss of hybrid digital-analog transmission in the digital transmission mode so as to determine a second parameter block group of the digital transmission mode; calculating a power amplification factor of the parameter blocks of the third parameter block group in the analog transmission mode; and according to the number of the parameter blocks of the second parameter block group and each power amplification factor, transmitting each parameter block of the first parameter block group in a hybrid digital-analog transmission mode. According to the method, the neural network parameters are subjected to block processing, the performance loss is calculated, the parameters are reasonably distributed to the digital transmission channel and the analog transmission channel in a block mode according to the performance loss, distribution of transmission resources is achieved, and the problems of the cliff effect and the low performance upper limit are effectively solved.

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.