265 results about "Modulation demodulation" patented technology

The utility model discloses a cluster channel machine based on RF Transceiver software radio, which comprises an FPGA, a DSP, an ARM, a clock management chip, an LNA, a PA, a DSA and a SAW Filter, the FPGA is respectively connected with the DSP, the ARM, a Flash3 and the clock management chip, the DSP is connected with an SDRAM1 and a Flash1, the ARM is connected with an SDRAM2 and a Flash2, the clock management chip is connected with a TCXO, the cluster channel machine comprises an RF Transceiver connected with the FPGA and the clock management chip, the input end and the output end of the RF Transceiver are both connected with the SAW Filter, and the input end and the output end of the RF Transceiver are connected with the LNA, the PA, the DSA and the SAW Filter. And the LNA, the PA, the DSA, the SAW Filter and the RF Transceiver are sequentially connected and arranged to form an RF RX receiving channel and an RF TX transmitting channel. According to the utility model, the circuit of an RF transmitting and receiving channel is simplified, multiple paths of radio frequency signals can be directly adopted, the radio frequency signals from 300MHz to 6GHz are output, and the functions of digital filtering, digital up and down converters, digital combination, modulation and demodulation, automatic power control and the like are integrally realized; different functions can be realized by loading different waveforms, different requirements can be met without changing hardware, the cost, the power consumption and the size are reduced, the debugging process is reduced, and the production is more convenient.

The invention provides a carrier modulation method and modulation-demodulation system for an MMC circulation suppressor, and the method comprises the following steps: obtaining MMC operation log data, carrying out the spectrum analysis, and extracting the spectrum amplitude distribution characteristics; identifying a bridge arm circulation condition based on the amplitude distribution characteristics, and further detecting bridge arm load abnormity and unit energy abnormity conditions; identifying a circulating current frequency component according to an energy abnormal condition, performing electric energy quality attenuation detection and initial circulating current position tracing, and determining a circulating current generation mechanism; and finally, based on the risk assessment result and the generation mechanism data, constructing a modulation parameter, and generating an adaptive circulation suppressor carrier modulation strategy. Compared with the prior art, the method has the following beneficial effects: through modulation of the circulating current suppressor, modulation of the circulating current suppressor is more accurate, so that the problems of inaccurate analysis of a bridge arm circulating current generation mechanism and inaccurate analysis of an energy abnormal condition of the MMC unit existing in carrier modulation of a traditional circulating current suppressor are solved.

The invention discloses a simulation verification method for an ASIC (Application Specific Integrated Circuit) control loop of a metal micro-resonance hemisphere-like gyroscope. The method comprises the following steps: based on an input angular velocity and a control signal, generating a vibration signal of a harmonic oscillator by using a pre-constructed dynamics simulation model; modulating and demodulating the vibration signal through a signal modulation and demodulation module, extracting a low-frequency component and removing high-frequency noise to obtain a parameter representing a modal precession state; an antinode control signal and a wave node control signal are generated through a PID controller module based on the parameters representing the modal precession state; an antinode control signal and a wave node control signal are decomposed to an orthogonal direction through a coordinate transformation and combination module to generate a driving signal, and the driving signal is applied to a harmonic oscillator to form a closed-loop self-excitation driving control loop; and verifying the dynamic performance of the closed-loop self-excitation driving control loop in a simulation environment. The technical problems of high power consumption, complexity and development cost of simulation verification are solved.

The invention relates to a laser automatic frequency locking control system and method based on cold atom feedback and a matched spectrum, the system comprises a laser module, a spectrum module, a photoelectric detector, a modulation-demodulation module, a digital PID controller and a data acquisition and operation platform, and the output end of the laser is connected with the spectrum module; the detection light output by the spectrum module enters the modulation-demodulation module after passing through the photoelectric detector; an output signal of the modulation-demodulation module enters a digital PID controller, and the digital PID controller is connected with a laser for frequency scanning control and is in two-way communication with a data acquisition and operation platform through a data interface; the data acquisition and operation platform comprises a cross-correlation algorithm processing module, a frequency control logic module, a cold atom feedback processing module and an abnormity management module, and is used for calculating, feeding back, controlling and monitoring the system operation state in real time and completing the automatic frequency locking process. According to the invention, the accuracy of frequency locking point identification and the frequency locking efficiency are improved; and automatic relocking can be achieved, and long-term stable frequency locking operation is guaranteed.

The invention relates to the field of mining laser gas detection, in particular to a modulation and demodulation method and system for carrier noise suppression, and the modulation and demodulation method comprises the following steps: S1, generating a driving current sequence through a laser gas sensor; s2, collecting a light intensity sequence to carry out data reconstruction; s3, extracting a harmonic signal, sending the reconstructed sequence into a lock-in amplifier, and respectively extracting a second harmonic signal and a first harmonic signal; and S4, detecting the gas concentration through the ratio by using the mapping relation between the gas concentration and the ratio of the second harmonic signal to the first harmonic signal. According to the method, a continuous data discrete reconstruction technology is introduced into a modulation and demodulation process, and a reference time sequence is generated by utilizing the characteristics of a laser output signal, so that self-matching and dynamic adjustment of modulation frequency are realized, external signal interference is effectively avoided, and the harmonic extraction stability is improved; meanwhile, the hardware structure is simplified, and the adaptability of the system to different gas absorption spectral lines is enhanced.

The invention discloses a seismic data acquisition device based on a ground 3C-DAS optical cable and an acquisition method thereof, is applied to the field of seismic exploration, and aims to solve the problems of high layout cost, too long construction time and low operation efficiency of an existing ground three-component detector. According to the method, a 3C-DAS armored optical cable is buried under a shallow earth surface in a parallel or orthogonal mode, a ground multichannel low-frequency DAS modulation-demodulation instrument collects phase data of Rayleigh scattering light reflected back from the 3C-DAS armored optical cable and carries out modulation-demodulation processing, and high-density distributed three-component seismic data distributed along the 3C-DAS armored optical cable is obtained; according to the system, high-density distributed three-component ground seismic data along the armored optical cable can be rapidly and efficiently acquired at low cost; the invention also provides a processing method for the collected high-density distributed three-component ground seismic data, an analysis method for a shallow surface velocity structure with high spatial resolution, and an inversion imaging method for longitudinal waves, transverse waves and surface waves.

The embodiment of the invention provides a chip atomic clock based on a speed grating spectrum and an implementation method. Comprising a multi-frequency coherent laser source, a quarter-wave plate, an atomic gas chamber, a photoelectric detector, a band-pass filter, a microwave modulation and demodulation module, a crystal oscillator, a phase-locked loop module, a bias-tree module, a DC modulation and demodulation module and a servo control module. The multi-frequency coherent laser source is sequentially connected with the quarter-wave plate, the atomic gas chamber, the photoelectric detector and the band-pass filter, the first output end of the band-pass filter is sequentially connected with the microwave modulation and demodulation module, the crystal oscillator and the phase-locked loop module, and meanwhile the microwave modulation and demodulation module is connected with the phase-locked loop module. And the second output end of the band-pass filter is connected with the DC modulation-demodulation module and the servo control module in sequence. And the bias-tree module is connected with the servo control module and the phase-locked loop module and feeds back a coupled signal to the multi-frequency coherent laser source so as to complete whole clock locking. The atomic clock is used for achieving the effect of improving the spectral line signal-to-noise ratio.

The invention discloses a gas leakage detection imaging device and method based on a single photon detection technology, and belongs to the technical field of gas detection and imaging. Aiming at the limitation problems of the existing gas leakage detection technology in the aspects of sensitivity, response speed, space imaging capability and anti-interference capability, nanosecond modulation control and synchronous photon counting are realized by utilizing an FPGA (Field Programmable Gate Array) through a visual gas detection imaging device combining an SPAD (Single Program Amplifier) array detector and a WMS modulation-demodulation mechanism; and the second harmonic of the absorption signal is further extracted by combining digital phase-locked amplification, so that gas leakage three-dimensional imaging with high spatial resolution, ppb-level sensitivity, strong background suppression capability and high time response is realized. The system has the advantages of high detection sensitivity, real-time imaging capability with high spatial resolution, high background light interference resistance and high signal-to-noise ratio, the demodulation method is novel, and the modular design has multi-gas compatibility and system expansibility.

A spatial adaptive multi-user service modulation and demodulation method suitable for various channel environments is characterized in that an uplink channel is configured with multiple paths of general carriers and multiple paths of helicopter special carriers in a frequency division mode, and the general carriers support uplink adaptive information transmission of terminals of various types and sizes in an MF-TDMA (Multimedia Frequency-Time Division Multiple Access) system; the on-satellite demodulator obtains a modulation coding mode of a burst data segment by identifying mode word information in a physical layer frame header, and demodulates a corresponding mode; the carrier special for the helicopter uses a continuous carrier mode, and multi-rate channel error correction coding and decoding under rotor wing shielding are supported in a channel interleaving mode. Downlink transmission is carried out in a fixed time slot and free time slot time division mode, and downlink information transmission for universal multi-type terminals and helicopter terminals can be supported at the same time. Compared with a common spatial modulation and demodulation method, the modulation and demodulation scheme provided by the invention can support adaptive transmission of general services of multiple types of terminals and helicopter service information on both an uplink and a downlink by using one satellite-borne modem.

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

The invention provides a power converter and a control circuit and method thereof, and the method comprises the steps: carrying out the modulation processing of the obtained switching frequency information and / or current reference information at a secondary side of the power converter, generating a reference pulse signal, and transmitting the pulse signal to a primary side through a digital isolator, therefore, a primary side control signal can be obtained after corresponding demodulation processing is carried out on the reference pulse signal on the primary side, and control over the on-off state of a primary side power tube is achieved. According to the scheme of the invention, through special modulation and demodulation setting, various kinds of information can be transmitted between the secondary side and the primary side only through a single channel, the use number of isolation devices between the primary side and the secondary side is reduced, the system structure is simplified, and the system cost is reduced.

The invention discloses a dynamic reconfigurable signal processing platform based on a ZYNQ architecture, and belongs to the technical field of digital signal processing, and the dynamic reconfigurable signal processing platform comprises a channel preprocessing unit, a high-speed AD sampling unit, a ZYNQ-PL logic unit and a ZYNQ-PS algorithm processing unit. A radio frequency signal is fed in from an antenna end and then enters the channel preprocessing unit, a balun circuit and a filter bank are adopted to carry out preselection filtering, amplification and conditioning on the radio frequency signal, and the signal is extracted and sent to the high-speed AD sampling unit; the high-speed AD acquisition unit converts a received analog signal into a digital signal and transmits the digital signal to the ZYNQ-PL logic unit, and the ZYNQ-PL logic unit is connected with the ZYNQ-PS algorithm processing unit through an AXI bus; wherein the ZYNQ-PL logic unit is composed of a static region and three dynamic regions, and is mainly used for realizing a logic part of a functional waveform and completing reconstruction and loading of the functional waveform; and the ZYNQ-PS algorithm processing unit completes algorithm processing, realizes modulation and demodulation of a functional waveform and realizes a functional algorithm.

A power and communication transmission arrangement includes an electronic accessory having a first modulator / demodulator. A motor vehicle includes a charging system to provide a power signal to the electronic accessory. At least one electrical conductor carries the power signal from the charging system to the electronic accessory. An infotainment system bi-directionally communicates with the electronic accessory. A second modulator / demodulator modulates the power signal based upon first signals received from the infotainment system to form first modulated power signals such that the first modulator / demodulator demodulates the first modulated power signals to extract the first signals for use in the electronic accessory. The first modulator / demodulator modulates the power signal based upon second signals from the electronic accessory to form second modulated power signals such that the second modulator / demodulator demodulates the second modulated power signals to extract the second signals for use in the infotainment system.

The invention provides an OTFS-based secret key generation method and system, and relates to the field of physical layer security, and the method comprises the steps that based on multiple rounds of channel detection between a master node and a slave node, the two nodes respectively execute the following operations by using respective received signals: based on the received signals, channel estimation is performed, and by using a channel estimation result, a secret key is generated; estimating a channel state information vector of the delay Doppler domain; performing decorrelation transformation on the estimated channel state information vector; and mapping the channel state information vector subjected to decorrelation transformation into a corresponding quantization interval, dynamically generating a coding index by adopting a self-adaptive index adjustment mechanism according to an index of the quantization interval, extracting high-order bits from a Gray code corresponding to the coding index, and generating a local shared key. According to the method, OTFS modulation and demodulation are used for physical layer key generation, autocorrelation caused by OTFS is solved through decorrelation transformation, and the efficiency, robustness and consistency of key generation in a mobile communication scene are improved.

The invention discloses a distributed sound wave sensing device based on PDH frequency locking and a demodulation method. The distributed sound wave sensing device comprises a narrow linewidth laser, a first optical fiber coupler, a heterodyne phase sensitive optical time domain reflectometer and a frequency stabilization feedback module. The frequency stabilization feedback module comprises a frequency stabilization modulation and demodulation module, a reference cavity and a server; the frequency stabilization modulation and demodulation module comprises an electro-optical modulator or an acousto-optical modulator, a photoelectric detector, a multiplier and a low-pass filter; the first path of light enters a reference cavity for resonance after being modulated by an electro-optical modulator or an acousto-optical modulator, a resonance signal enters a photoelectric detector through cavity reflection, and a signal output by the photoelectric detector is subjected to signal demodulation by a multiplier and a low-pass filter and then is used as feedback to be input into a server for proportional-integral processing; the laser is fed back and output to a modulation interface of the narrow-linewidth laser, and frequency compensation is performed on the laser, so that the laser is locked on the reference cavity; according to the invention, through frequency stabilization and homologous modulation and demodulation, line width and phase drift of the laser can be suppressed at the same time.

The invention provides a dynamic monitoring system and method for a submarine optical cable array reservoir, which is applied to the technical field of marine geophysical prospecting, and comprises a wet-end subsystem positioned underwater and a dry-end subsystem positioned on a base bank, the dry end subsystem comprises a light source module used for generating an optical signal; the modulation transmitting module is used for modulating the optical signal to obtain modulated pulse light; the underwater wet end subsystem comprises an optical cable transmission module used for transmitting modulation pulse light; the optical fiber four-component node module is used for dynamically and continuously monitoring the reservoir for a long time, and modulating the acquired sound pressure signal and the triaxial vibration signal onto the modulated pulse light in response to the received modulated pulse light to form a return light signal; the dry end subsystem further comprises a modulation-demodulation module used for receiving the return optical signal and demodulating the return optical signal to obtain four-component monitoring data. According to the invention, sound pressure and three-axis vibration response can be integrated on the same node, and passive four-component synchronous acquisition is realized.

The present invention provides a pointer data buffering modulation and demodulation method and system for oil drilling, relating to the field of wireless communication technology, including: constructing a pointer data buffer pool, which is a nonlinear topological cache structure for receiving data stream inputs from multiple sensors; performing quality scoring through a data quality analyzer to establish data priority tags; obtaining the current state of the pointer data buffer pool, inputting it into a modulation control channel, and generating a dequeue order; performing state prediction, and generating an active compression instruction if a preset percentage threshold is met; performing cluster compression; and performing modulation and demodulation management based on the cluster compression results and the dequeue order. The present invention solves the technical problem in the prior art that single-chip microcomputers used for oil drilling have limited processing power, making it impossible to efficiently execute complex data modulation and demodulation algorithms, thereby limiting the real-time and accuracy of data processing during drilling operations.

The invention discloses a time-frequency signal security bastion host which comprises an input module, an output module, a signal modulation and demodulation module, an identity authentication module, an equipment management module, a power management module, a signal security detection module, an equipment security audit module and a security login management module. Intranet and extranet isolation is carried out on extranet standard time-frequency signals and intranet time-using equipment through the time-frequency security bastion host, high-precision time-frequency security time service and output of intranet time synchronization signals are achieved, the accuracy of high-precision time frequency and the non-tampering property of standard time are guaranteed, and credible transmission of high-precision standard time is achieved.

The invention provides a commercial satellite-oriented intelligent measurement and control responder and a multi-frequency-band measurement and control method thereof in order to solve the problems that a current measurement and control responder can only support a measurement and control task of a corresponding frequency band, so that frequency band selection flexibility is poor, and flexible measurement and control requirements cannot be met, and belongs to the technical field of spaceflight measurement and control. According to the invention, the architecture of the basic function module, the multi-band radio frequency front-end module and the multi-band measurement and control antenna is adopted, and the basic function module is integrated into a sharing platform with core functions of baseband processing, modulation and demodulation, intermediate frequency conversion and the like, so that an independent complete transceiving channel is prevented from being repeatedly designed for each band. Meanwhile, radio frequency front ends and antennas of multiple frequency bands such as KA, S and X are integrated, and the limitation that a traditional responder can only work in a single frequency band is broken through. An independent S frequency band measurement and control mode, an S + KA frequency band measurement and control mode, an S + X frequency band measurement and control mode and a KA + X frequency band measurement and control mode can be realized. The method is suitable for design of the measurement and control responder in aerospace constellation networking.

The application discloses a kind of time division multiplexing three-axis wide spectrum light source resonant type fiber-optic gyroscope detection systems and methods, belong to gyroscope optical system design field.System is constituted by optical system and signal detection system, and optical system includes a wide spectrum light source, a push-pull Y waveguide, a circulator, three mutually orthogonal transmission type fiber ring resonant cavity, two sections of delay optical fiber and a photoelectric detector;Signal detection system includes modulation and demodulation module, time division decoupling module and low-pass filter module.Three transmission type fiber ring resonant cavities are sequentially connected, and the time of optical signal reaching three fiber ring resonant cavities is different by being set delay optical fiber between adjacent two transmission type fiber ring resonant cavities.The application ingeniously designs three fiber ring resonant cavities to form three-axis integrated structure.In this way, the time difference of three-axis signals is utilized, and multiplexing in time domain can be realized without adding additional devices.

The invention discloses a full-duplex terahertz and space laser fusion transmission system, and relates to the field of terahertz communication and optical communication, and the system comprises an optical signal receiving and transmitting module which is used for intelligently selecting and switching a terahertz link or a space laser link according to a channel environment and a weather condition, an optical signal is transmitted to the terahertz / space laser optical fiber wireless conversion module or is received from the terahertz / space laser optical fiber wireless conversion module; the terahertz / space laser optical fiber wireless conversion module is used for completing carrier signal generation, data modulation, demodulation, amplification, splitting and combining and other processing on an optical domain and an electric domain; and the wireless transceiver module is used for transmitting or receiving the terahertz signal and the space laser signal in a wireless mode. According to the invention, the terahertz link or the space laser link can be switched to carry out signal transmission according to the channel condition and the weather environment, the anti-interference capability of the communication system is greatly improved, and stable and efficient communication in almost all-weather scenes such as rain, snow and fog is ensured.

The present invention discloses a grating light valve type current sensor based on temperature compensation, which includes a signal processing unit and a sensing unit. The sensing unit is a three-beam grating light valve temperature-current sensing unit based on micro-optoelectromechanical system technology. The grating light valve based on micro-optoelectromechanical system technology is used to measure the two parameters of temperature and current, and according to the detected temperature information, the current measurement error introduced by the change of the grating light valve with temperature is corrected to meet the accurate current measurement requirements in the outdoor engineering application process. At the same time, a closed-loop control modulation and demodulation algorithm based on square wave + stepped wave is adopted to improve the linearity and dynamic measurement range of current measurement.

The present invention discloses a method and device for demodulating and analyzing large Doppler frequency shift (OTFS) satellite communications, belonging to the field of satellite communications. The device includes a data acquisition unit, an IQ imbalance calculation unit, an amplitude error calculation unit, a continuous phase signal generation unit, a convolution detection frame header determination unit, two guard slot removal units, two receive reference signal acquisition units, a sampling phase error acquisition unit, two theoretical demodulation reference signal generation units, a channel model extraction unit, a Doppler frequency error calculation unit, a Doppler frequency error elimination unit, a phase error calculation unit, a Doppler phase error elimination unit, a channel estimation unit, an interpolation and smoothing unit, a channel error elimination unit, a Wigner transform unit, a symplectic finite Fourier transform unit, a digital modulation and demodulation unit, and an error vector magnitude (EVM) calculation unit. The present invention can achieve high-precision demodulation and analysis of large Doppler frequency shift (OTFS) orthogonal time-frequency-space modulation (6G) satellite communication signals.

Disclosed is a fiber-wireless hybrid sensor network deployment method based on an annealing algorithm. In the method, a plurality of fiber sensing tips, a plurality of modulation and demodulation nodes, and a wireless gateway construct a fiber-wireless hybrid sensor network architecture. The fiber sensing tips are directly connected to the modulation and demodulation nodes by overhead optical fibers. The modulation and demodulation nodes modulate and demodulate the optical signals in the plurality of fiber sensing tips connected thereto to convert the optical signals collected by the fiber sensing tips into electrical signals, and transmit the processed electrical signals to the wireless gateway by wireless means. The number of enumerated modulation and demodulation nodes is N S Next, the deployment scheme of the modulation and demodulation nodes is optimized to obtain the optimal deployment scheme of the modulation and demodulation nodes by taking the minimum value of the scheme cost function as the target by using the simulated annealing algorithm, and the fiber-wireless hybrid sensor network architecture is deployed.

The invention discloses a no-cable communication system based on a photon integrated phased array, and the system comprises a plurality of symmetrical double-end receiving and transmitting communication systems, a modulation and demodulation module in a local end emits a modulation optical signal, and the modulation optical signal passes through a light transmitting antenna of the local end for multi-beam transmission; the optical receiving antenna at the opposite end receives an optical signal transmitted by the local end; the corresponding optical fiber beam splitter performs energy splitting on the received optical signal, one part of light is used for bidirectional closed-loop tracking control, and the rest of light enters the corresponding modulation and demodulation module; the modulation-demodulation module at the opposite end emits a modulated optical signal, and the modulated optical signal passes through the optical emission antenna at the opposite end to perform multi-beam emission; and the optical receiving antenna of the home terminal receives the optical signal transmitted by the opposite terminal so as to establish a bidirectional full-duplex communication link. According to the invention, rapid and agile beam control and simultaneous multi-beam transceiving are realized, and the application requirements of near-field cableless multi-link parallel communication are met.

The invention relates to the technical field of sensors, and particularly discloses a pre-embedded sensor based on electric field and magnetic field decoupling energy and signal simultaneous transmission and a corresponding energy and signal simultaneous transmission system. The sensor is provided with a secondary side coupler with a specific hierarchical structure, the secondary side coupler comprises a first ferrite layer, a 2 * 2 array metal pole plate layer, a second ferrite layer and a coil layer, the secondary side coupler is matched with a primary side symmetrical coupler, and an independent power transmission and bidirectional signal transmission channel is constructed by utilizing the near-field electromagnetic decoupling characteristic. According to the system, the resonance compensation network and the modulation-demodulation and crosstalk suppression circuit are integrated, so that effective decoupling between energy and signals and between uplink and downlink signals is realized, and the transmission efficiency and the communication reliability are remarkably improved. Experiments show that the system can realize high-efficiency energy transmission and stable bidirectional full-duplex communication, is excellent in performance in large data volume transmission, and provides a high-reliability integrated power supply and data transmission solution for pre-embedded scenes such as concrete structures.

The invention discloses a power transformer fault automatic identification and grade determination method, and relates to the technical field of power system equipment state monitoring and fault diagnosis, and the method comprises the following steps: 1, carrying out the cross-domain fusion of multi-modal signal collection, including sensor type selection and layout, time-space synchronous triggering and signal transmission; 2, constructing a transfer learning framework for cross-field coupling feature mining, wherein the transfer learning framework comprises digital twin model construction, transfer learning algorithm optimization and coupling feature modulation and demodulation; according to the invention, through cross-domain fusion of multi-modal signal acquisition, cross-field coupling information is comprehensively reserved; coupling features are accurately mined based on a digital twin model and transfer learning optimization; the hidden fault recognition accuracy and the grade judgment adaptability are improved through an attention enhancement framework; the limitation of traditional single physical field analysis is broken through on the whole, the cost is reduced, meanwhile, early warning and full-life-cycle accurate management and control of various hidden faults are achieved, and support is provided for power grid safety.

The invention relates to the technical field of oil-gas exploration logging, provides a logging work data real-time transmission system and method based on an embedded structure, and aims to solve the problems that in the prior art, data transmission is insufficient in real-time performance, a logging system is difficult to troubleshoot, and the data transmission efficiency is low. And the technical problem that the ground decoding board only supports cable communication of a single modulation mode is solved. Comprising a downhole instrument used for collecting original logging electric signals; the mode transformer is used for performing impedance matching processing on the original logging electric signal to obtain a preprocessed logging signal; the amplifier module is used for performing method processing on the preprocessed logging signal to obtain an amplified logging signal; the A / D conversion module is used for converting the amplified logging signal into a digital signal from an analog signal to obtain a digital logging signal; the modulation-demodulation module is used for decoding the digital logging signal to obtain a decoded logging signal; and the network communication module is used for uploading the decoded logging signal to logging acquisition software of an upper computer in real time.

The present application relates to the technical field of communications. Disclosed are a communication method and apparatus, a terminal device and a network device. The network device sends first information, the first information being used for indicating modulation enabling information corresponding to data and / or a modulation mode corresponding to the data, the modulation enabling information corresponding to the data being AI-based modulation or non-AI-based modulation, and the modulation mode corresponding to the data being an AI modulation mode or a non-AI modulation mode; and correspondingly, the terminal device receives the first information. Hence, when AI technology is applied to channel, information or signal processing of wireless communication systems, the present application considers the combination of AI and modulation modes. In the combination of AI technology and modulation, the present application uses the first information to implement network indication for enabling or disabling AI-based modulation and / or network indication for AI modulation modes, and then flexibly configures modulation and demodulation of data and / or modulation modes of data on the basis of communication requirements and the like.

This invention discloses a polarization state modulation method based on regular polyhedral constellation points, comprising: selecting the order of polarization modulation and the corresponding regular polyhedral class; dividing the original binary bitstream into a conventional modulation bitstream and a polarization state modulation bitstream, wherein the conventional modulation bitstream is used to generate conventional modulation symbols, and the polarization state modulation bitstream is used for polarization state mapping; obtaining the corresponding polarization state description parameters using the polarization state modulation bitstream and the order of polarization modulation, determining the polarization weighting factor and performing polarization weighted fusion to obtain dual-channel high-dimensional modulation symbols to be transmitted; transmitting the symbols through an orthogonal dual-polarization antenna after preprocessing; performing RF front-end processing on the received horizontal and vertical polarization components of the RF signal at the receiving end to obtain the Jones vector representation of the baseband received signal; recovering the polarization state information by combining the Stokes parameters, and recovering the original binary bitstream by combining the conventional modulation and demodulation results.