16 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 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 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.

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.

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.

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.

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.

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.

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.