250 results about "Coded modulation" patented technology

The invention discloses an HPLCamp (High Performance Liquid Chromatography) based on deep learning. The invention discloses an HRF dual-mode communication adaptive coding modulation and anti-noise method. The method comprises the following steps: acquiring an optical radio frequency signal amplitude-phase change rate and synchronously sampling and normalizing; calculating a node amplitude-phase residual error to generate a nonlinear mapping coefficient; monitoring coherent change to solve a drift trend, adjusting a modulation coding optimization scheme, compensating distortion and outputting an anti-noise result. According to the method, the instantaneous amplitude and phase of the optical radio frequency dual-mode signal are extracted, a multi-dimensional amplitude-phase characteristic matrix is formed in combination with time domain synchronization and a normalization template, differential residual modeling and nonlinear mapping coefficient calculation are carried out between impedance nodes, and dynamic compensation of amplitude-phase mismatch and envelope offset is achieved. A drift trend quantity is generated based on coherent offset parameter differentiation, feedback is provided for modulation format and coding strategy optimization, amplitude equalization and phase correction are completed, the signal synchronization degree and amplitude-phase consistency are improved, and the steady-state response and anti-disturbance performance of a transmission link are enhanced.

The invention relates to a computing power resource dynamic scheduling method, device and equipment based on deep reinforcement learning and a medium thereof, and the method comprises the steps: constructing a joint state vector through real-time fusion of a network layer channel state and computing layer node load data, and driving a strategy network to generate transmission parameters and resource allocation actions of cooperative control; the code modulation parameters of the wireless transmission module and the computing resource proportion of the target node are synchronously configured in the execution layer, and dynamic task scheduling in the channel decay environment is achieved; a multi-target reward mechanism is designed to couple transmission bit error rate penalty, resource utilization efficiency and task timeliness evaluation indexes, and a reinforcement learning agent is guided to balance communication stability and computing power demand conflicts; according to the method, strategy network parameters are optimized through time difference errors, closed-loop feedback is formed in combination with channel state prediction and node load updating, the problems of network and calculation layer splitting decision, insufficient dynamic adaptability and multi-target optimization imbalance in the prior art are effectively solved, and the task scheduling success rate in the time-varying wireless environment is improved.

The invention belongs to the technical field of commercial inventory management, and discloses a store inventory commodity management and search system based on RFID induction, and the system comprises the steps: collecting a phase change time sequence of candidate RFID tags at high frequency when a user executes a moving operation; before matching, analyzing actual motion characteristics of a user according to instantaneous frequency of a sequence, and performing dynamic normalization processing on a time axis; and when a plurality of targets exist in a matching result, further performing coded modulation on the transmitting power of the reader and analyzing the relevance of echo response to finish the final uniqueness arbitration. A traditional mode of probabilistic judgment depending on signal instantaneous quantity is converted into a deterministic inventory management process based on dynamic process feature confirmation, so that the problem of uncertainty of inventory searching and checking caused by commodity density and signal instability in a commercial environment is solved.

The invention discloses a multi-frame reconstruction multispectral imaging system based on dynamic space-time joint coding. The system comprises a filtering window module used for limiting the spectral range of imaging; the spatial code modulation module is used for providing spectral codes in a spatial dimension; the time coding modulation module is used for carrying out inter-frame modulation on the spectrum codes provided by the space coding modulation module; the optical imaging module is used for imaging the light field modulated by the time coding modulation module on the color acquisition module; the color acquisition module is used for carrying out further spectral coding on the light field to obtain a measurement image; a calculation reconstruction module; the method is used for recovering a high-dimensional multispectral image data cube by using a measurement image. The method has the advantages of being light in weight, low in cost, high in underqualitative relieving capacity, efficient and stable in reconstruction method, high in adaptability and practicability and the like.

Disclosed are a transceiver decoding method and system based on protograph differential chaos shift keying (DCSK), the method including acquiring an information bit sequence, performing a coded modulation on the information bit sequence via a protograph DCSK transmitter, and outputting a plurality of modulated symbols; inputting each modulated symbol into a wireless channel for channel interference, and outputting a received symbol corresponding to each modulated symbol; using a target extrinsic information-aided network to determine a target a-posteriori probability vector corresponding to each received symbol; inputting each target a-posteriori probability vector into an a-priori calculation decoder for decoding, and outputting an initial decoded bit sequence; and determining a target decoded bit sequence according to the initial decoded bit sequence and a preset check matrix. The technical problem of lower decoding accuracy caused by the existing transceiver decoding methods designed for a DCSK system is solved.

A method of video encoding includes performing context modeling to determine a context model for each of a number of bins of syntax elements corresponding to residues of a region of a transform skipped block in a current picture. The number of the bins of syntax elements being context coded does not exceed a maximum number of context coded bins set for the region. The method further includes encoding, according to Block Differential Pulse Code Modulation (BDPCM), the syntax elements based on the determined context models. When the maximum number of context coded bins is reached, remaining bins of syntax elements are encoded based on a bypass model.

The invention discloses a single-channel received RIS direction of arrival estimation method, and relates to the technical field of wireless sensing, and the method comprises the steps: mapping a space-time coding matrix into a control signal, and loading the control signal to periodically arranged electromagnetic units of an RIS, thereby carrying out the space-time coding modulation of an incident signal, and forming a reflection signal comprising angle information; receiving the reflected signal by a single-channel receiving end and converting the reflected signal into baseband data, performing Fourier transform on the baseband data to obtain a frequency domain component, and constructing a plurality of virtual receiving channels; and constructing a covariance matrix based on the signal of the virtual receiving channel, performing eigenvalue decomposition on the covariance matrix, constructing a spatial spectrum function, and performing peak search on the spatial spectrum function to obtain the direction of arrival of the incident signal. The invention further discloses a single-channel receiving RIS direction of arrival estimation system, high-precision direction of arrival estimation under the single-channel receiving condition is achieved, and the system has the advantages of being simple in system structure, low in hardware cost, high in algorithm resolution and high in anti-noise capacity.

The invention discloses a sweep frequency interference modeling and interference optimization method for a remote control data link of an unmanned aerial vehicle. The invention provides: 1) a transmitter-receiver adaptive modeling system based on unmanned aerial vehicle signal priori parameters; 2) an interference source generation system which comprises four modulation types of single-tone interference, random binary code modulation interference, PN code MSK interference and pulse interference and integrates two modes of stepping frequency sweeping and frequency hopping frequency sweeping; and 3) an interference strategy intelligent optimization system based on a particle swarm optimization algorithm. Performing similarity verification through DTW, and establishing a high-fidelity communication link model; connecting an interference source to a communication system by adopting a front door coupling mechanism, and constructing a bit error rate-oriented black box optimization model; and finally, carrying out mechanism analysis on an optimization result through a multi-dimensional interference effectiveness evaluation system. According to the method, an efficient interference parameter optimization scheme is provided for the unmanned aerial vehicle countering defense system, the optimization convergence speed is remarkably improved while the interference efficiency is guaranteed, and the method has important application value in the field of low-altitude security and protection.

The invention discloses a programmable metasurface fault rapid diagnosis method based on orthogonal coding space-time modulation. The method comprises the following steps: step 1, applying independent orthogonal coding space-time modulation to each metasurface unit on a programmable metasurface to be diagnosed by adopting a time-varying signal based on orthogonal coding; 2, irradiating the programmable metasurface to be diagnosed by using a single-frequency plane wave; 3, receiving a reflection signal of the programmable metasurface to be diagnosed, and recovering each orthogonal coding channel energy from the reflection signal; step 4, according to the magnitude of the recovered orthogonal coding channel energy, determining a malfunctioning metasurface unit; when a certain unit breaks down, preset orthogonal coding modulation cannot be normally executed, so that a corresponding coding channel in a transmitting signal is lost, and therefore whether the unit corresponding to each coding channel breaks down or not can be judged by recovering energy distribution of each coding channel in a receiving signal, and accurate and efficient fault diagnosis is achieved.

Disclosed is a method comprising, by a transmitter apparatus, partitioning (901) an input data stream to obtain a bit stream X1 and a bit stream X2; subjecting (902) the bit stream X2 to encoding by LDPC encoders, to obtain X2 parity bits, and X2 information bits; applying (903) SPC encoding to the X2 parity bits, together with the bit stream X1, to obtain sign bits, wherein the bit stream X1 is used as padding bits; subjecting (904) the sign bits, the padding bits, and the X2 information bits, to an interleaver operation to obtain an interleaver output; subjecting (905) the interleaver output to Gray mapping to form multiple consecutive quadratic amplitude modulation, QAM, symbols; modulating (905) the QAM symbols by quadratic amplitude modulation to obtain a modulated data stream; and transmitting (906) the modulated data stream via a radio access network or optical fibre communication network.

The utility model provides an automatic code modulation difunctional test strip which comprises a substrate, the substrate is provided with a first coding area and a second coding area, the first coding area is provided with a plurality of first coding electrodes, and the first coding area generates a first digital coding signal for a detection instrument to carry out code modulation on detection of a first index; the second coding area is provided with a plurality of second coding electrodes, and the second coding area generates a second digital coding signal so that the detection instrument can carry out code modulation on detection of a second index. The detection instrument can automatically identify the first digital coding signal generated by the first coding area and the second digital coding signal generated by the second coding area, so that the purpose of automatically carrying out code modulation on detection of the first index and the second index of the detection instrument is achieved, manual code number input is avoided, and the code modulation accuracy and convenience are improved.

The invention discloses a method for detecting a frequency hopping signal under a low signal-to-noise ratio based on an FPGA (Field Programmable Gate Array), which comprises the following steps of: at a transmitting end, adding a synchronous sequence with low side lobe, high anti-interference performance and self-adaptive adjustment of sequence length under different channel conditions to a frame header and a frame tail of a data frame, and after coding modulation and up-conversion at the transmitting end, carrying out frequency hopping on the frequency hopping signal under the low signal-to-noise ratio; the frequency hopping signals are converted into a group of frequency hopping signals with m hops; and at a receiving end, counting over-threshold frequency hopping signals, jointly judging whether the packet of data is valid data, and dynamically adjusting a correlation peak threshold according to a channel condition. According to the invention, the synchronization accuracy is improved.

The invention discloses a low-orbit satellite Internet of Things terminal baseband communication system, and relates to the technical field of Internet of Things communication. The system comprises a data frame construction unit, a channel regulation and control unit, a bandwidth tracking unit and a decoding correction unit, wherein the data frame construction unit generates an initial frame according to an Internet of Things protocol and dynamically adjusts a frame structure in combination with channel characteristic parameters to complete data packing; and the channel regulation and control unit judges a coding modulation mode according to real-time channel quality and satellite motion parameters, processes a transmitting link, dynamically adjusts the transmitting power of the high-frequency analog signal based on path loss estimation, and finally transmits the high-frequency analog signal through an antenna. At a receiving end, a bandwidth tracking unit adaptively adjusts the loop bandwidth according to the switching characteristic parameter, and dynamically filters the received signal; and the decoding correction unit performs adaptive early stop correction of iterative decoding according to the decoding convergence rate, and finally completes data analysis.

The invention provides an acoustic-magnetic coupling backflow cable nondestructive testing and long-distance transmission integrated method and system, and relates to the technical field of backflow cable transmission detection, accurate fault identification and positioning are realized by sending acoustic-magnetic dual excitation signals to a backflow cable, collecting responses, extracting multi-source features and then performing fusion model analysis, and the detection accuracy is improved. The problem that a traditional method is low in detection precision is solved. After being coded and modulated, a detection result is stably transmitted to a receiving end through a long-distance transmission link, so that the integration of nondestructive detection and long-distance transmission of the acoustic-magnetic coupling backflow cable is realized, and the defect of instability of long-distance transmission is overcome. And a self-adaptive power amplification and frequency hopping anti-interference mechanism is adopted in the transmission process, so that the anti-interference performance, the stability and the environmental adaptability of signal transmission are improved, and the actual requirements of backflow cable detection and long-distance transmission in a strong electromagnetic interference environment and a complex working condition are met. By introducing a self-adaptive calibration mechanism and comparing with a reference signal, excitation and acquisition parameters are corrected in real time, and the detection precision and the long-term reliability are further improved.

A single-wire control device for brushless DC (BLDC) motor is disclosed, applicable to the usage between a controller and a pre-drive stage of the BLDC motor, including an encoding modulation unit, a transmission wire, and a demodulation decoding unit; wherein, the encoding modulation unit is connected to the controller to receive a plurality of control signals from the controller, and encodes and modulates the control signals to generate a modulated signal; the transmission wire is connected to the encoding modulation unit for transmitting the modulated signal to the demodulation decoding unit; the demodulation decoding unit is connected to the transmission wire for receiving, demodulate and decoding the modulated signal to generate the original control signal, which is then passed to the pre-driver stage.

The application relates to an infrared code modification method and device based on a decoder, equipment and a storage medium. The method comprises the following steps: acquiring infrared code modulation type information, obtaining a first code characteristic value for distinguishing code formats according to the infrared code modulation type information; acquiring electric appliance type information, obtaining a second code characteristic value for distinguishing remote control objects according to the electric appliance type information; acquiring a test code set for performing an infrared test from a preset code library according to the first code characteristic value and the second code characteristic value; and obtaining modified infrared codes based on the test code set for performing the infrared test. The application provides a method for modifying infrared codes of a remote controller without other remote controllers.

The invention discloses a communication method, device and system, communication equipment, a readable storage medium and a program product, and the method comprises the steps: receiving a first signaling message sent by a first core network element through a first shunting module, and when the first signaling message is recognized as a sensitive message, sending the sensitive message to a first core network element; the first signaling message is sent to the first quantum communication module; the first signaling message is coded and modulated through the first quantum communication module, and the coded and modulated first signaling message is sent to a second quantum communication module at the network element side of a second core network through a quantum channel; therefore, the data security on the physical communication line between the distributed network elements is realized, and the overall security and transmission efficiency of the cross-domain distributed deployment network architecture are improved.

The application discloses an optical transmission method, device and system based on a polar code embedded irregular QC-LDPC concatenated TCM coding and decoding, which comprises the following steps: sending randomly generated information bits into a polar encoder; transmitting the information bits to an irregular QC-LDPC encoder through a reliable channel in the polar encoder; encoding the information bits by the irregular QC-LDPC encoder to obtain a first encoded signal; performing serial-parallel conversion on the first encoded signal to obtain a parallel bit stream; sending the parallel bit stream into a two-dimensional trellis coding and modulation unit to perform coding and modulation, thereby obtaining constellation symbol information; sending the constellation symbol information into a carrier amplitude and phase modulation unit to obtain a modulation signal; and modulating a to-be-sent light source signal by using the modulation signal to complete optical transmission. The application firstly embeds an irregular QC-LDPC code in a polar code, and then concatenates a two-dimensional trellis code, thereby realizing high-speed, stable and reliable transmission of an optical communication system.

The invention relates to a spread spectrum underwater acoustic communication coding and decoding method, which comprises the following steps of: performing dual-channel coding modulation, sequentially performing CRC (cyclic redundancy check) coding, serial-parallel conversion, multi-system error correction coding and interleaving operation on an information bit stream at a transmitting end, then performing spread spectrum modulation on a code element by using a pseudorandom sequence, and finally mapping modulation output of an I channel and a Q channel into a baseband signal, and a spread spectrum underwater acoustic communication signal is formed through pulse shaping and up-conversion processing. According to the method, the communication accuracy is improved through a dual-channel incoherent and coherent redundancy decoding mode and an opportunity cross validation decoding mode.

The invention relates to the technical field of sound wave positioning, and provides a sound wave positioning multi-label identification and wake-up system and method.The system comprises a transmitting end and a receiving end, and the transmitting end modulates unique identification information of a label to a sound wave carrier through a coding modulation circuit according to a preset frame structure; a coding sound wave signal containing a lead code, a mode code and ID data content is formed, an RFID signal is synchronously transmitted, after a decoding circuit of a receiving end receives the signal, two-stage wake-up detection is carried out by utilizing an integrated frequency detection and mode correlator, interruption is generated only when the mode code is matched to wake up a main control unit, the main control unit reads the decoded ID, and the RFID signal is sent to the receiving end. And matching verification is carried out on the tag and the ID in the RFID signal, and the distance of the tag which is successfully matched is calculated according to the time difference of arrival of the two signals. According to the invention, through the coding sound wave, double-wave pairing and intelligent wakeup mechanism, the problem of signal conflict during multi-label concurrent work is effectively solved.

The invention discloses a wireless data transmission system and method using a compression technology, and the system comprises a data generator which is used for generating to-be-transmitted wireless data and transmitting the to-be-transmitted wireless data to a compression module, the compression module is used for compressing the to-be-transmitted wireless data into compressed data by using a self-adaptive differential pulse code modulation algorithm, and the compressed data is transmitted to the compression module through the self-adaptive differential pulse code modulation algorithm; the gateway end comprises a gateway protocol end and a transmission module, and the gateway protocol end is used for receiving the compressed data packet and sending the compressed data packet to the transmission module for transmission; and the server is used for receiving and decompressing the compressed data packet transmitted by the transmission module so as to realize the transmission of the wireless data to be transmitted. According to the invention, low-cost, high-efficiency and high-real-time wireless data transmission under a large field domain can be realized.

The present invention provides a BDPCM-based image decoding method and an apparatus therefor. According to the present invention, an image decoding method performed by a decoding device is characterized by comprising: a step for determining whether the width and height of a current block are less than or equal to a maximum transform block size; a step for acquiring a BDPCM flag indicating whether block-based incremental pulse code modulation (BDPCM) is applied to the current block when the width and height are less than or equal to the maximum transform block size; a step for acquiring, on the basis of the BDPCM flag, a BDPCM direction flag indicating a prediction direction for the current block; a step for deriving a prediction sample of the current block on the basis of an intra prediction mode derived on the basis of a BDPCM direction flag; and a step for deriving a recovery sample of the current block on the basis of the prediction sample.

The present application relates to the technical field of signal modulation and coding joint identification, and particularly relates to a modulation and coding joint identification method and system based on a multi-channel attention network, which encodes a modulation information sequence by simulating a communication environment with a randomly generated radio information sequence, generates a digital modulation signal and an analog modulation signal, and assembles signal sample data; constructs a multi-channel convolutional gated deep attention network model for modulation and coding joint identification, and trains and optimizes the multi-channel convolutional gated deep attention network model using the signal sample data; inputs a signal to be identified into the trained and optimized multi-channel convolutional gated deep attention network model, and obtains the modulation and coding category of the signal to be identified using the trained and optimized multi-channel convolutional gated deep attention network model. The present application can improve the efficiency of modulation and coding joint identification, can realize the task of signal modulation and coding joint automatic identification, and is convenient for deployment and implementation.

The embodiment of the invention discloses an underwater acoustic communication adaptive signal processing method and device, equipment and a medium, and relates to the technical field of underwater acoustic communication. The method comprises the following steps: receiving a sound wave signal, and converting the sound wave signal into a digital signal; carrying out resampling on the digital signal to obtain a resampling signal; converting the resampling signal into a frequency domain signal, and separating the frequency domain signal into independent subcarrier symbols; performing dual channel estimation on the subcarrier symbols to obtain channel response data; and obtaining a signal-to-noise ratio, and performing coded modulation on the channel response data based on the signal-to-noise ratio to obtain output data. According to the method, complex and changeable environmental characteristics (such as serious multipath effect, Doppler frequency shift, strong noise interference and time-varying characteristics) of the underwater acoustic channel can be effectively handled, and the communication reliability and the transmission efficiency are remarkably improved.

The invention provides a universal satellite flash communication module hardware system and a data transceiving method. The system comprises a master control SoC, a satellite flash baseband, a power module, an interface module, a storage module and a radio frequency front end. The interface module is respectively connected with external equipment and the master control SoC, the master control SoC is connected with the satellite flash base band through a high-speed digital bus, and the system management unit, the task scheduling unit and the protocol stack processing unit are integrated and are responsible for system initialization, state monitoring, computing resource allocation and communication protocol encapsulation and de-encapsulation; the star flash base band is connected with the radio frequency front end to complete encoding, modulation, demodulation and decoding processing of signals; the radio frequency front end receives and transmits wireless signals through an air interface, and conversion between radio frequency signals and baseband signals is achieved. Through an integrated design and a cooperative working mechanism, the data throughput capacity and communication stability are greatly improved, the transmission delay is reduced, meanwhile, high portability is achieved, external connection and use of multiple platforms can be flexibly adapted, and the satellite flash wireless communication function is efficiently expanded.

A coding modulation method, demodulation and decoding method and device for a passive optical network are applied to the technical field of passive optical networks, and the coding modulation method comprises the following steps: carrying out system polarization coding on a received first data stream to obtain a second data stream with an information bit and a frozen bit; according to a preset many-to-one mapping rule, mapping the second data stream to a symbol set to obtain a mapped symbol stream; and adjusting the sending probability of each symbol in the symbol stream through truncation probability shaping in a preset format to obtain a modulated modulation signal. According to the invention, the coding modulation of the data is carried out by combining the system polarization coding technology, the many-to-one mapping technology and the truncation probability shaping technology, so that the data can be obtained through simple inverse operation, the introduction of a distribution matcher to realize probability shaping is avoided, the complexity source is reduced, and the data processing efficiency is improved. And meanwhile, the algorithm complexity is greatly reduced compared with the algorithm which needs to be subjected to iterative de-mapping and decoding.

The invention provides a holographic transmission method and system based on semantic communication and micro-comb, and the method comprises the steps: extracting semantic features from to-be-transmitted original holographic data through employing an integrated code modulation (JCM) network, carrying out the coding of the extracted semantic features, and obtaining a discrete time continuous amplitude (DTCA) semantic sample; generating mutually coherent double micro-combs by using a micro-ring cavity, taking a carrier comb located at a transmitting end in the double micro-combs as a phase cloning carrier, and transmitting a transmitting signal carrying the DTCA semantic sample to a receiving end through an optical fiber; and taking a local oscillator comb located at a receiving end in the double micro combs as a local oscillator, and decoding and reconstructing the received transmitting signal at the receiving end by using a joint decoding demodulation JDD network.

This application discloses an encoding and modulation method, a decoding method, and related equipment, which provides an encoding and modulation method that can adjust the spectral efficiency of the encoding system and achieve better encoding performance. The method of this application includes: the encoding device dividing target bit information into a first bit set and a second bit set; the encoding device generating amplitude bits from the first bit set and phase bits from the second bit set using a distribution matching algorithm; and the encoding device transforming the amplitude bits and phase bits into corresponding four-dimensional symbol information according to a D4Lattice isomorphic constellation diagram.

This invention discloses a system and method for acoustic wireless communication that eliminates frequency-selective fading and delay spread. Addressing the problems of frequency-selective fading and delay spread in acoustic wave transmission within the water-based drilling fluid channel inside the drill pipe, it employs orthogonal frequency division multiplexing (OFDM) technology. The transmitting end includes a coding and modulation module, an OFDM modulation module, a power amplification unit, an impedance matching network, and an underwater acoustic transducer. The receiving end includes a synchronization module, a cyclic prefix removal module, a Fourier transform module, a channel estimation module, a channel equalization module, and a decoding module. The synchronization module uses the Schmidl & Cox time-frequency joint synchronization algorithm, the channel estimation module uses the MMSE frequency domain estimation algorithm based on training sequences, and the channel equalization module uses the linear MMSE frequency domain equalization algorithm. Through the co-design of hardware and algorithms, this invention effectively eliminates frequency-selective fading and delay spread, achieving high-speed, low-error-rate acoustic wireless transmission. The data transmission rate can reach 250 kbit / s, and the bit error rate can be reduced to 10%. ‑3 .

Systems, methods, and instrumentalities are disclosed for video coding. Video coding may be or may include video encoding and / or video decoding. In examples, a coding device, such as an encoder and / or a decoder, may obtain a coding block associated with a video content. The coding device may determine whether transform skip and / or block differential pulse coded modulation (BDPCM) associated with the coding block has been enabled. Based on a determination that the transform skip and / or BDPCM has been enabled, the coding device may obtain a coefficient associated with the coding block. The coding device may obtain a plurality of predicted signs, e.g., based on the obtained coefficient. In examples, the coding device may predict BDPCM direction.