88 results about "Communications receiver" patented technology

The waveguide carrying a nonlinear crystal with reflective interface, a pump photon source and a circulator define an optical parametric amplifier which uses optical power from the pump photons to boost incoming signal and idler photons which carry the encoded signal. The nonlinear crystal performs optical parametric amplification upon the incoming optical signal in a quantum photonic process that generates additional signal and idler photons to thereby boost the intensity of the incoming signal. A photodetector is coupled for communication with the third port and operative to convert the reflected optical signal into an electrical signal defining the output of the communications receiver.

The invention relates to a Rydberg atomic communication receiving system and method based on AT split peak value analysis, and belongs to the technical field of quantum communication. The system comprises a detection laser, a coupling laser, an AOM / EOM, a function generator, a high-frequency signal generator, a cesium atom gas chamber, a photoelectric detector, a lock-in amplifier, a data acquisition module and a microwave signal output module. The AOM / EOM modulates the frequency of the detection laser; the microwave signal output module generates an AM modulation microwave signal and transmits the AM modulation microwave signal to the cesium atom gas chamber, so that the target Rydberg state atoms generate an AT splitting effect to calibrate system parameters; the photoelectric detector and the lock-in amplifier obtain a first harmonic component based on the transmission light. During communication, the system is arranged in a microwave electric field received by communication, and the data acquisition and processing module outputs AM modulation microwave signals received by the recovered cesium atom gas chamber based on calibrated system parameters and phase locking. The method solves the problem of signal distortion existing in EIT-AT direct communication transmission and the problem of tedious operation of a heterodyne method.

An optical communication receiver system for a mobile platform includes: a surface having an entrance aperture for entry of an optical communication signal from a remote source; an optical receiver to receive the optical communication signal through the entrance aperture; a reflective layer over at least a portion of the surface to at least partially reflect an alignment beam that is substantially coincident with the optical communication signal; a camera positioned to detect the reflected alignment beam; a processor to determine alignment information about the alignment beam relative to the entrance aperture based on the reflected alignment beam detected by the camera; and a transmitter to transmit the alignment information to the remote source to enable the remote source to center the optical communication signal in the entrance aperture.

The invention discloses a real-time damage detection device for a communication receiver under strong electromagnetic pulse impact, and belongs to the field of electromagnetic compatibility. According to the device, different signal injection modes are adopted, the injection power and the injection duration of signals are adjusted, an injection experiment of high-power electromagnetic pulses is carried out, and the damage condition of the communication receiver under strong electromagnetic pulse attack in a complex electromagnetic environment is simulated through the working state of the most sensitive first-stage low noise amplifier of the receiver, so that the reliability of the communication receiver is improved. And real-time damage detection is carried out, and exploration about damage conditions is carried out, so that timely maintenance and further protection of the communication receiver in a complex environment are facilitated. The device can simulate the impact effect of strong electromagnetic pulses on the communication receiver, comprehensively monitor the working state of the communication receiver in real time and record the damage condition, provide core support for rapid positioning and isolation of fault equipment, and remarkably shorten the communication link repair time.

This invention provides a communication countermeasure simulation method based on random simulation, belonging to the field of electronic countermeasure simulation technology. The method first establishes a probability distribution model of reconnaissance information deviation for key parameters of the communication target; then, based on the probability distribution model of each parameter deviation, independent random sampling is performed to generate instantaneous values ​​of frequency deviation, positioning deviation, and modulation pattern recognition results at each moment, and the guidance parameters of the jammer are determined; next, the instantaneous interference-to-signal ratio (ISR) at the target receiver at the current moment is calculated; finally, the ISR calculated at the communication receiver is compared with a preset communication performance degradation ISR threshold to determine whether the jamming is successful. The model of this invention has clear physical meaning and can accurately quantify the impact of reconnaissance information deviation and propagation loss on the jamming effect, significantly improving the credibility and practicality of the simulation evaluation.

serial communications bus.20 25 28 73 31 24 D ec 2 02 5 A B S T R A C T 2 0 2 5 2 8 7 3 3 1 2 4 D e c 2 0 2 5 s e r i a l c o m m u n i c a t i o n s b u s . 400 Serial communications bus interface 220A 408A Upstream Serial communications receiver bus 412A 404A 410 402 Upstream transmitter Upstream control 414A Clock Upstream enable Lock-out Serial communications Downstream control control circuit bus interface 220B Electronic 404B 414B processor Downstream Downstream enable 408B transmitter 406B 3 / 5 Downstream Serial communications receiver bus 412B FIG. 4 20 25 28 73 31 24 D ec 2 02 5 2 0 2 5 2 8 7 3 3 1 2 4 D e c 2 0 2 5 b u s i n t e r f a c e 4 0 6 A 2 0 2 t r a n s m i t t e r U p s t r e a m c o n t r o l U p s t r e a m e n a b l e Downstream control c o n t r o l c i r c u i t b u s i n t e r f a c e E l e c t r o n i c p r o c e s s o r D o w n s t r e a m D o w n s t r e a m e n a b l e t r a n s m i t t e r D o w n s t r e a m

The present disclosure is directed to a light-signal communication receiver device including a photo-receiving diode configured to generate a current signal on a first node from a received light signal, a preamplifier configured to convert the current signal on the first node into a voltage signal on a second node, and a differential amplifier including a first input connected to the first node and a second input connected to a third node coupled to the second node via an adjustment circuit. The adjustment circuit is configured to offset the level of the voltage signal of the second node, on the third node, in a controlled manner by a control signal.

This invention belongs to the field of space laser communication and deep space exploration technology, and discloses an integrated detection device for space laser communication monitoring and interaction. The device includes a main body, on which are integrated a solar panel, a navigation imaging device, a communication antenna, a communication receiver, a radar, a landing support, and functional components for communication monitoring, environmental perception, and interactive operation. This invention forms a closed-loop system through electrical, signal, and mechanical connections, enabling simultaneous execution of multiple tasks, significantly improving the device's space operation efficiency, reducing the load pressure on space launch vehicles, and adapting to the space constraints of on-orbit operations. The communication antenna and receiver achieve bidirectional signal interaction through a high-speed laser communication module and are linked with the navigation imaging device and environmental sensors to ensure stable transmission and status monitoring of laser communication signals, which is beneficial for practical applications and operations.

The present disclosure provides a method, apparatus, and device for compensating for carrier phase and IQ imbalance of a communication receiver, which can be applied to the field of communication signal processing technology. The method includes: sampling a received signal of a communication receiver to obtain a received signal sequence, wherein the communication receiver includes a transmitter and a receiver, and the receiver processes the transmitted signal from the transmitter to obtain a received signal; calculating the expectation and covariance matrices of the received signal sequence, and constructing a likelihood function corresponding to the received signal sequence based on the expectation and covariance matrices; derivatizing the logarithmic function of the likelihood function to obtain a set of estimation equations corresponding to multiple parameters to be estimated; iteratively solving the set of estimation equations according to a predetermined number of iterations to obtain multiple target estimation parameters corresponding to the multiple parameters to be estimated; and compensating the received signal sequence based on the target estimation parameters to obtain a target signal sequence.

This invention discloses a short-window gamma-gamma turbulence parameter prediction method for space-to-ground laser communication, belonging to the technical field of space-to-ground laser communication and atmospheric turbulence channel parameter prediction. This method addresses the problems of traditional methods, such as strong dependence on long observation windows, significant degradation in prediction accuracy under short-window scenarios, and insufficient robustness under low signal-to-noise ratio conditions. It establishes a short-window observation model for the space-to-ground optical link and a gamma-gamma channel statistical model, constructs time-dependent short-window training data, and designs a short-window gamma-gamma network. Temporal features are extracted through a convolutional backbone, and a scintillation exponential physical regularization auxiliary head is used to achieve joint parameter prediction under physical constraints, outputting predicted gamma-gamma distributed parameters. This method can achieve high accuracy and good stability in parameter prediction under short observation windows and low signal-to-noise ratio conditions, and can be used for turbulence channel state characterization at the space-to-ground laser communication receiver.

The application discloses a wireless communication receiver and a wireless communication receiving method. The receiver comprises a signal receiving circuit and a data processing circuit. The signal receiving circuit is used for receiving a wireless data packet transmitted by a remote device, wherein the wireless data packet comprises a preamble signal and a data signal. The signal receiving circuit comprises a transimpedance amplifier, a low-pass filter and an analog-to-digital converter connected in sequence. The transimpedance amplifier and the low-pass filter are configured in a wideband mode and a filtering mode. An input end of the data processing circuit is connected with an output end of the signal receiving circuit. The data processing circuit is further connected with the transimpedance amplifier and the low-pass filter. The data processing circuit is used for sending a control signal to switch the modes of the transimpedance amplifier and the low-pass filter. Compared with a conventional receiver, the application saves area and power and has more accurate signal strength estimation.

A power dolly includes a planar platform supported by at least three wheels, a battery mechanically coupled to the planar platform and located between the wheels, a mains input connector configured to receive mains power and to charge the battery, a battery charger electrically coupled to the mains input connector and configured to charge the battery using mains power received at the mains input connector, an inverter configured to receive direct current (DC) power from the battery and to provide alternating current (AC) power at an inverter output connector, and a wireless communication receiver configured to receive a control signal and to output the received control signal via a control output connector.

Road hazard warning systems and methods that deliver real-time, point-of-need alerts to road users. One system includes a command station with at least one sensor responsive to hazardous roadway conditions, a two-way communications system, a control system, and a power supply. The command station transmits hazard signals when a threshold condition is detected or when hazard information is received from external sources. A tactical station includes a communications receiver, a control system, a power supply, and a warning system such as flashing lights, illuminated signage, or reflectors. In some embodiments, multiple combined command / tactical stations are deployed along a roadway, each configured to detect hazards, exchange signals, and activate warnings. Sensors may include water depth, flow velocity, or pressure devices. Power may be supplied by a battery and solar panel. Methods are disclosed for detecting hazards, transmitting signals, and activating warnings to mitigate roadway risks.

The invention discloses an electromagnetic wave phase-polarization decoupling control system, belongs to the technical field of optical communication and quantum optics, and is suitable for equipment such as a quantum communication receiver and a laser radar. The invention aims to solve the problems of high bit error rate (greater than 8%) caused by phase symbol chaos and crosstalk (crosstalk coefficient is only-25dB) caused by polarization and phase coupling in the prior art. The system realizes decoupling through two core mechanisms: one is a phase expression forced unification module which uniformly converts an input electromagnetic wave phase into a standard form e (i (kx omegat)), comprises a phase detector, a converter and a calibration unit, and eliminates symbol chaos; and the Hilbert space tensor product regulation and control hardware realizes independent regulation and control of a polarization state and a phase state through a polarization liquid crystal array, a phase modulator and a tensor product operation unit based on a quantum state tensor product principle (psi gt, = [polarization state] [phase state]), and cuts off a physical coupling path. The method has the beneficial effects that the phase symbol chaos rate is reduced to 0%, and the crosstalk coefficient is increased to-45dB; when the method is applied to quantum communication, the bit error rate is less than or equal to 1.2%, and the key distribution rate is doubled; when the method is applied to the laser radar, the ranging error is less than or equal to + / -1cm, and the haze environment target recognition rate is improved from 60% to 85%. According to the invention, efficient decoupling of phase and polarization is realized, and the performance of optical communication and quantum optical equipment is remarkably improved.

A system (100) includes a test transmitter (102) including a pseudorandom bit sequence (PRBS) generator and a signal generation circuit. The PRBS generator is configured to generate a PRBS. The signal generation circuit is configured to generate a test signal comprising a repetition of a truncated portion of the PRBS such that a period of the repetition is shorter than a period of the PRBS.

The invention discloses a microwave continuous variable quantum teleportation method, which comprises the following steps that: a third party adopts a Josephh parametric amplifier and a microwave beam splitter to generate a dual-mode compression state in a set low-temperature environment, and sends the dual-mode compression state to a communication sender and a communication receiver; after receiving the signal, the communication sender performs Bell measurement to generate a feed-forward signal, and sends the feed-forward signal to the communication receiver; and the communication receiver processes the signal sent by the third party according to the received feedforward signal to obtain the quantum state sent by the communication sender, and microwave continuous variable quantum teleportation is completed. The invention also discloses a system for realizing the microwave continuous variable quantum teleportation method. Through the innovative design of the continuous variable quantum teleportation scheme and the innovative signal processing mode, microwave continuous variable quantum teleportation is achieved, reliability is better, and accuracy is better.

The utility model relates to communication equipment technical field discloses a sensitive tunnel communication receiver, including communication receiver body and protection shell, the protection shell inside is provided with a plurality of groups of wire arrangement mechanism, and wire arrangement mechanism includes wire arrangement seat and limit seat, wire arrangement seat fixedly arranged on the inboard of protection shell side, the limit seat slidingly arranged in the inboard of protection shell, wire arrangement seat and limit seat symmetrical arrangement, wire arrangement seat one side is provided with first line groove, the limit seat one side is provided with second line groove, first line groove and second line groove same specification. The utility model discloses the wire arrangement mechanism of setting is arranged to the arrangement of power cable, makes power cable neat, prevents the power cable of different voltage grades or purposes and cross winding together, avoids the interference of power cable to communication line because of electromagnetic coupling, is favorable to ensuring communication sensitive, guarantees that each area of tunnel can stably receive communication content.

A wastewater sensor cap that selectively attaches to a standard sewer cleanout port assembled in a house's sewer line. The sensor cap includes a cap body with external threads that connect to internal threads formed inside the cleanout port. Formed or attached to the cap body is a nut body, which enables the cap body to be securely tightened to the cleanout port with a wrench. Attached to the cap body are two electrodes that extend through the cap body and into the void space formed in the cap that communities with a fill area in the cleanout port. Attached to each electrode are wires from an electronic signal device that create an alarm signal when a ground fault occurs caused by sewer contacting the tips of the electrodes extending into the void space. The signal device may include a wireless communication transmitter that sends a wireless signal to a remote wireless communication receiver configured to receive the wireless signal from the signal device.

Reduced complexity maximum likelihood sequence detectors (rMLSDs) for detecting multi-bit symbols, such as symbols found in pulse amplitude modulation (PAM), quadrature amplitude modulation (QAM), and phase shift keying (PSK) signal constellations with more than two constellation points, are disclosed. One illustrative digital communication receiver includes an initial equalizer that derives an initial sequence of symbol decisions from a filtered received signal, each symbol decision in the initial sequence having a second possible symbol decision, and an rMLSD that derives a final sequence of symbol decisions by evaluating a state metric for only each symbol decision in the initial sequence and its second possible symbol decision.

The invention relates to the technical field of wireless communication, and discloses a simplified AGC-based frame synchronization method for a wireless communication receiver of a satellite portable station, which is characterized by comprising the following steps of: receiving a signal and separating an IQ component, simplifying AGC processing, preprocessing the signal, performing differential processing and simplifying correlation operation, and judging a peak value and completing frame synchronization. A feed-forward AGC structure is adopted, detection calculation is simplified through Taylor expansion first-order approximation, frequency offset and phase offset influences are eliminated through differential processing, correlation operation is simplified, a preprocessing mode of normalization processing or self-adaptive threshold adjustment is matched, efficient frame synchronization of a wireless communication receiver is achieved, system operation complexity and hardware resource consumption are reduced, and the system performance is improved. And the frame synchronization real-time performance and stability are improved.

The application discloses an OFDM-LFM integrated signal waveform receiving method and equipment based on fractional Fourier transform, which combines and improves LFM and OFDM, adopts OFDM-LFM integrated radar communication signals taking orthogonal LFM signals as subcarriers, and has the advantages that, due to the large Doppler tolerance of the LFM subcarriers, compared with sinusoidal subcarriers, the method can not only improve radar range resolution and spectral efficiency, but also has strong ability to avoid Doppler effect, and can reliably transmit information; when receiving OFDM-LFM signals, in order to solve subcarrier frequency linear transformation and radar parameter extraction and other problems, based on the sensitivity of a fractional Fourier transform (FRFT) to LFM signals, the application uses the FRFT as an integrated signal receiver, realizes separation of an integrated signal communication receiver and a radar receiver, reduces the complexity of the system, and improves the system performance.

The application provides a method and device for arbitrary sampling rate conversion of a communication receiver, comprising: performing down-rounding operation according to a sampling frequency of a sampling signal and a sampling frequency of the sampling signal required by a signal processor to determine an integral result; performing integral times down-sampling on the sampling signal according to the integral result to obtain a sampling result corresponding to the integral times down-sampling; performing curve fitting based on the sampling result corresponding to the integral times down-sampling to obtain a continuous signal; calculating a sampling time interval after decimal times decimation according to the sampling frequency of the sampling signal required by the signal processor; and performing decimal times decimation on the continuous signal based on the sampling time interval after the decimal times decimation to complete the arbitrary sampling rate conversion. The application has good decimation effect on any decimal times sampling frequency, has wide application range, and is more suitable for practical application.

Disclosed herein are methods for transmitting asynchronous event data via a synchronous communication interface using an expected event rate, and associated imaging systems. In one embodiment, an imager includes an array of event vision pixels, and a synchronous communication transmitter configured to transmit frames of data to a synchronous communication receiver. The pixels generate event data based on activity within an external scene. The imager transmits, at a first time and to the receiver, an expected amount of data to be included in a frame transmitted to the receiver at a second time. The expected amount of data can be based on a prediction of an amount of event data that will be generated at a future point in time for transmission to the receiver in the frame. The imager can then transmit the frame to the receiver at the second time with an amount of data corresponding to the expected amount of data.

The application relates to the technical field of wireless communication, and discloses a DCOC calibration and tracking method based on a radio frequency receiver composed of a low noise amplifier (LNA), a mixer (Mixer), a polyphase filter (PPF) and an analog-to-digital converter (ADC); the method specifically comprises the following steps: when the radio frequency receiver is powered on or restarted, a preset DC calibration method is used to perform DC calibration on all gain combinations of the low noise amplifier (LNA) and the polyphase filter (PPF); when a temperature sensor detects that the temperature change of the radio frequency receiver is out of a set range, the preset DC calibration method is used to perform DC calibration again on all gain combinations of the low noise amplifier (LNA) and the polyphase filter (PPF); and in an idle state of the receiver or a service transmission gap, a Kalman filtering algorithm is used to track the DC residual value of the low noise amplifier (LNA). The application performs DC calibration on a communication receiver, especially a zero intermediate frequency receiver with high direct current bias requirement, and solves the problem that the DC of the receiver is greatly affected by temperature and aging and then affects the signal quality.

This application discloses a mobile terminal-based unmanned vehicle debugging system and method. The system includes a mobile terminal and a vehicle communication interface module. The unmanned vehicle includes a vehicle OBD interface module, an on-board communication receiver, an on-board communication network, and a vehicle controller. The mobile terminal stores unmanned vehicle debugging, control, and diagnostic software programs. In wired debugging mode, one end of the vehicle communication interface module is connected to the mobile terminal, and the other end is connected to the vehicle OBD interface module. The vehicle OBD interface module is connected to the vehicle controller through the on-board communication network. In wireless debugging mode, the mobile terminal communicates with the on-board communication receiver through a wireless network. The on-board communication receiver is connected to the vehicle controller through the on-board communication network.

The application relates to a semantic communication method and device, a communication device, a storage medium and a computer program product. The method comprises the following steps: sending a communication request to a communication receiver, wherein the communication request carries a target feature in a communication message sent by a communication initiator; the target feature represents a knowledge base related to a semantic communication process between the communication receiver and the communication initiator, and the target feature comprises a communication feature or a knowledge base identifier; receiving a knowledge base request message initiated by the communication receiver; obtaining a target knowledge base based on the knowledge base identifier, and returning the target knowledge base to the communication receiver, so that the communication receiver and the communication initiator perform semantic communication. An ICN-based semantic knowledge base service network can be constructed on a mobile network, and the communication receiver can timely obtain a knowledge base of a corresponding field with a high correlation degree with the semantic communication process, thereby steadily improving communication efficiency and communication reliability.

The invention relates to on-machine measurement, in particular to a method for improving transmission time precision of a trigger signal in Bluetooth communication, which comprises the following steps of: establishing Bluetooth communication between a receiver and a measuring head; time slot communication is established between the receiver and the measuring head; the receiver and the measuring head complete clock alignment operation through time slot communication; the measuring head is in contact with the workpiece to be measured, generates a trigger signal, records a clock time point generated by the trigger signal, and sends the trigger signal and the clock time point to the receiver through Bluetooth communication; the receiver receives the trigger signal and the clock time point, calculates Bluetooth communication delay time, and forwards the trigger signal to the machine tool after waiting for a period of time according to the Bluetooth communication delay time; the machine tool compensates and corrects the system error in the time period from generation of the trigger signal to receiving of the trigger signal, and it is ensured that the final measurement precision meets the requirement; according to the technical scheme provided by the invention, the defect that an existing standard Bluetooth communication protocol cannot be directly applied to the field of on-machine measurement due to a relatively large measurement precision error can be effectively overcome.

To provide a radio communication receiver capable of simultaneously receiving two RF signals of two frequency bands in multiband / multimode communication.SOLUTION: A radio communication receiver includes a branching filter 4 for branching a reception wave into a first 1RF signal and a second 2RF signal of different frequency bands, a second 1BDC91 for generating the second 1RF signal by frequency-converting the first 1IF signal, and a second 2BDC92 for generating the second 2RF signal by frequency-converting the second 2IF signal. The multiplexer 4 includes the isolators 41 to which the reception wave is input, the MGT42 that demultiplexes the reception wave that has passed through the isolators 41 into the first incident wave and the second incident wave having equal amplitudes, the first 1RF that generates the first 1BPF45 signal by filtering the first incident wave with the first frequency band as the pass band, and the second 2RF that generates the second 2BPF46 signal by filtering the second incident wave with the second frequency band as the pass band.SELECTED DRAWING: Figure 1

This disclosure provides a laser communication method, a laser communication receiver, a transmitter, and a laser communication system. The method applied at the receiver includes: receiving a target light signal emitted by the transmitter using a first telescope; processing the target light signal using a first polarization beam splitter to obtain first polarized light and second polarized light; processing any one of the first polarized light and second polarized light using a first optical wave splitter to obtain multiple first sub-signals with different wavelengths; processing two first sub-signals with the same wavelength using a balanced detection device to obtain a transmission sub-signal, wherein the transmission signal includes multiple transmission sub-signals with different wavelengths; and processing the multiple transmission sub-signals using a digital signal processor to obtain a transmission signal.

A communication method, apparatus, electronic device and storage medium for a computing power cluster are provided. An implementation of the method includes: during a process of communicating with a communication receiver using Remote Direct Memory Access (RDMA) protocol, obtaining a first packet loss rate corresponding to the RDMA protocol; in response to the first packet loss rate being higher than a first preset packet loss rate, initiating a first handshake request to the communication receiver for requesting to switch to Transmission Control Protocol (TCP) for communication; receiving a first handshake response returned by the communication receiver for the first handshake request, and determining a first starting transmission position of data according to a last data receiving position in the first handshake response; and communicating, by using the TCP, with the communication receiver starting from data corresponding to the first starting transmission position.