294 results about "Phase coding" patented technology

A hybrid neural network architecture is disclosed that integrates matrix multiplication-free (MatMul-free) transformation layers with spiking neural network (SNN) layers for efficient, low-power computation. The system includes an interface module configured to convert intermediate continuous-valued data from MatMul-free layers into a spike-compatible format using encoding techniques such as rate coding, phase coding, or threshold-based conversion. The SNN layers process the spike-encoded data in an event-driven manner, enabling sparse, temporal inference. Training is supported by a hybrid optimization strategy combining backpropagation in MatMul-free components with surrogate gradient descent or spike-timing-dependent plasticity (STDP) in SNN layers. The architecture reduces computational complexity, supports real-time adaptability, and enables deployment in energy-constrained environments such as edge devices and neuromorphic platforms. The system may be implemented in hardware, software, or a co-designed pipeline optimized for dynamic sensor data, control signals, or continuous inference tasks.

The invention discloses a hierarchical cooperative control method for a cascaded H-bridge frequency converter, and the method comprises the steps: distributing a disturbance signal following a spiral phase coding rule for each H-bridge unit, and enabling the vector sum of the phase of the group of signals to generate a plurality of energy quasi-zero moments in a preset disturbance period through design; at the quasi-zero moment when the energy is greatly suppressed, synchronously triggering all units to perform high signal-to-noise ratio data acquisition, and accurately identifying transient parameters representing dynamic characteristics of each unit based on the acquired data; and finally, performing closed-loop adjustment on an upper-layer power distribution strategy, a bottom-layer current loop and the like according to the identified transient parameters so as to compensate the dynamic response difference of each unit. According to the method, high-precision online parameter identification can be realized on the premise of not influencing stable operation of the system, and the power balance capability and transient stability of the system are remarkably improved.

The invention relates to the technical field of LED display, and discloses an LED display color calibration method, device and system. The method comprises the following steps: applying a reverse test voltage to LED pixels in an LED display panel in a display frame blanking period, and calculating a real-time junction temperature value and a service life state value of each LED pixel; discrete phase coding reconstruction is carried out on the original display driving signal to obtain a temperature self-adaptive driving compensation signal; a temperature-sensitive fluorescent composite material layer is arranged on a substrate layer of an LED display panel, and the temperature-sensitive fluorescent composite material layer is activated through blue light components emitted by LED pixels to obtain an optical passive compensation spectrum; dividing the LED display panel into a plurality of independent control areas and generating an inter-area cooperative compensation parameter set; and constructing a pixel-level point diffusion compensation function and performing spatial domain dynamic compensation to obtain an LED display output image after color calibration. According to the invention, the problem of non-uniform area caused by manufacturing batch difference of a large-size display screen is effectively solved.

The invention provides a civil structure deformation anomaly detection method based on time series data, and relates to the field of civil structure deformation anomaly detection. A disturbance intensity response value, a disturbance curvature and a local disturbance folding feature are constructed, a range adjustment enhancement value is formed by combining a symbol jump mark and a neighborhood disturbance difference value, a latent guide feature is generated based on the range adjustment enhancement value, a disturbance reconstruction feature is constructed through superposition of a diffusion residual error and an asymmetric difference item, normalization mapping is completed to obtain a normalization feature, and the normalization feature is obtained. A disturbance spinor modulation factor is constructed in combination with a nonlinear suppression correlation coefficient, a disturbance spinor tensor is formed through a logarithmic compression channel and a square amplification channel and by applying quadrature phase coding, a tensor potential mapping map is generated under a path coupling and self-coupling mechanism, disturbance energy offset and extreme value deflection are constructed based on the tensor potential mapping map, and disturbance energy offset and extreme value deflection are obtained. And a probability potential index is formed, and civil structure deformation anomaly detection model training is completed based on the probability potential index, so that civil structure deformation anomaly detection is realized.

The invention discloses a communication-detection integrated sonar signal design method and device based on multi-pulse composite modulation, and the method comprises the steps: dividing a total frame period into a detection sub-frame and a communication sub-frame, enabling the detection sub-frame to achieve the high-resolution distance measurement through employing a bidirectional linear frequency modulation (BILFM) signal, a communication sub-frame adopts a multi-frequency multi-phase composite modulation (MTPM) signal to realize high-bit-rate data transmission; after band filtering, orthogonal demodulation, low-pass filtering and down-sampling preprocessing are carried out on detection sub-frame echoes, distance and speed information is extracted by adopting fast-time low-sampling two-dimensional fast Fourier transform (2D-FFT), unambiguous Doppler frequency is recovered by utilizing the Chinese remainder theorem (CRT), and accurate speed measurement of long-distance and high-speed targets is realized; a communication subframe receiving signal is subjected to IQ demodulation after down-conversion, Costas loop carrier synchronization and matched filtering, and multi-frequency multi-phase coded data are extracted. According to the method, the time-frequency collaborative design of detection and communication is realized, the distance resolution and the speed measurement range are considered, and the signal bandwidth utilization rate and the underwater information transmission reliability are remarkably improved while the system complexity is kept low. The device comprises a processor and a memory, and an executable program for implementing the method is stored in the memory. The technology can be widely applied to the fields of unmanned underwater vehicles, ocean monitoring, underwater sensing networks and the like.

The invention discloses a phase coding-based non-third-party quantum multi-party privacy set intersection method and application, and belongs to the technical field of quantum privacy calculation. An existing quantum private set intersection scheme mostly aims at a two-party scene or depends on a third party to realize confidential intersection, and potential safety hazards are easily caused by constructing a trusted third party in practical application. In order to solve the problem, the invention provides a quantum intersection protocol for multiple participants, and the protocol effectively realizes intersection calculation of private sets of the participants through a quantum state phase encoding technology. And meanwhile, comprehensive correctness and security analysis is performed on the protocol, and the feasibility and security of the protocol are verified through a Qiskit simulation protocol core process. The method not only can efficiently solve the problem of intersection of multi-party private sets and obtain public elements on the premise of protecting the privacy of each party, but also can be used as a basic module in a multi-party cooperative computing application scene, and is wide in application range.

The invention relates to a liquid crystal phased array dynamic star finding control method based on holographic phase coding. The method comprises the following steps: acquiring an expected beam pointing angle of a target satellite relative to an antenna array; generating a two-dimensional phase matrix suitable for a liquid crystal phased array based on the expected beam directional angle; performing temperature compensation on the two-dimensional phase matrix, converting the two-dimensional phase matrix into a digital driving level, and loading the digital driving level to a liquid crystal driving circuit; a radio frequency beam pointing to the expected beam pointing angle is formed through radiation of the liquid crystal phased array antenna panel; and beam pointing errors are detected in real time according to downlink signal characteristics and are compensated. The liquid crystal phased array dynamic star finding control method based on holographic phase coding shows remarkable technical progress and practical advantages in multiple aspects; according to the method, a high-performance and high-reliability dynamic beam pointing system is constructed through key technologies such as holographic phase coding, real-time temperature compensation, high-speed calculation and closed-loop feedback, and the method is particularly suitable for high-dynamic scenes such as high-speed mobile carriers and low-orbit satellite communication.

The invention belongs to the technical field of data processing and analysis, and particularly relates to a geomagnetic and inertial navigation fused glasses guide direction identification and content triggering system, which comprises a sensing compensation component, a calculation storage component, a guide resource component and a display component, the sensing compensation assembly comprises an inertial measurement unit, a geomagnetic sensor, an active magnetic compensation coil and a coil driving module; the calculation storage assembly comprises a control processor and a memory, and the control processor is used for driving the active magnetic compensation coil to obtain a coil compensation geomagnetic vector according to a phase coding zero-returning sequence, executing attitude propagation based on the inertial measurement unit, and executing course updating on the coil compensation geomagnetic vector based on Huber anti-outlier loss to obtain a head attitude. According to the invention, the influence of magnetic disturbance and attitude jitter on direction identification and content triggering can be effectively reduced, and the stability, consistency and practicability of the glasses guide system in a real use scene are improved.

The invention discloses a label printing equipment abnormity diagnosis method based on multi-modal fusion, and the method comprises the steps: collecting multi-modal data, and generating a label path phase coding sequence; based on label path phase coding, locking alignment is executed on the multi-modal data, and unification is performed until a phase coordinate system is synchronized; inputting synchronous multi-modal data, inverting the slip amount, the elongation rate and the speed difference of the coiled material, and outputting implicit physical variables; constructing a three-domain hybrid diagnosis network which comprises phase, time and visual branches, and extracting a multi-modal feature vector; setting phase-physical consistency gating, performing sparse selection and routing on the sub-experts, and outputting a candidate feature set; and a phase alignment attention mechanism is adopted, candidate features are fused, and abnormal types, confidence coefficients and station positioning are output. Through multi-modal data phase alignment, physical constraint inversion and cross-domain fusion, high-precision anomaly diagnosis and intelligent deviation correction of the label printing equipment are realized.

The invention discloses a radar signal classification method and system based on a quantum classical hybrid convolutional neural network, and belongs to the technical field of quantum calculation and signal processing. According to the scheme, the classic radar signals are sequentially subjected to preprocessing, quantum phase encoding, quantum convolution feature extraction, quantum measurement and classic convolution neural network classification, and high-precision classification of the radar signals is achieved. According to the method, the parallel advantage of quantum calculation on high-dimensional feature extraction and the robustness of a classic neural network on classification decision are fully utilized, the classification accuracy and the anti-noise capability are remarkably improved, and the method is suitable for radar signal processing tasks in a complex environment.

The invention relates to the technical field of position control feedback, and particularly provides a laser interference feedback positioning system and a positioning method thereof, and the system comprises a wave source phase modulation subsystem, a dynamic path compensation subsystem and a multi-dimensional feedback calibration subsystem. The method comprises the following steps: establishing a dynamic phase encoding model through nonlinear time sequence analysis; an original fixed phase beam of a laser wave source is converted into a tuning beam with space-time correlation, and a phase characteristic matrix of the tuning beam is used as an input parameter of a dynamic path compensator; constructing a compensation field model based on the tuning beam phase feature matrix; generating a dynamic compensation gradient by using the phase characteristic matrix; integrating the dynamic compensation gradient and the environment sensing data of the laser wave source, and constructing a six-dimensional state space calibration model; and outputting comprehensive positioning parameters including the displacement vector, the confidence interval and the environmental stability coefficient. Static measurement of a traditional interferometer is converted into an active regulation and control process with high adaptability and controllable errors.

Quantum key distribution (QKD) communication techniques where time-bin phase (T-P) encoded photons generated by a QKD transmitter system are converted into hybrid time-bin and polarization encoded photons, transmitted over a communication channel and received by a QKD receiver system, are converted back into T-P encoded photons using an interferometer structure.

The invention discloses a phase regulation curved surface conformal active metasurface, and relates to the technical field of metasurface design, a metasurface unit is composed of a metal layer and a dielectric layer, the metal layer comprises a metal structure layer and a metal backboard layer, and the dielectric layer comprises an F4B dielectric substrate and an ABS dielectric layer. The metasurface unit is sequentially provided with a metal structure layer, an F4B dielectric substrate, an ABS dielectric layer and a metal backboard layer from top to bottom, and the metal structure layer is externally connected with a feed structure by adopting a circular through hole technology and is used for adjusting the voltage at the two ends of the variable capacitance diode. According to the phase regulation curved surface conformal active metasurface, the 3D printed curved surface substrate is combined with the voltage programmable 2-bit phase code, so that the metasurface has high adaptability to the curved surface structure, and electromagnetic wave dynamic regulation and control and vortex wave generation can be carried out within the frequency band of 9.3 GHz to 10.5 GHz and within the angle range of 0 degree to 50 degrees.

The invention relates to a printed circuit board solder resisting method, which is characterized in that distinguishable miniature passive synchronous marks are preset in a PCB design stage, and optical phase coding is combined, so that multi-dimensional physical identifier embedding and automatic parameterization layout design are realized. Before and after exposure, a high-speed imaging detection and self-adaptive optical algorithm is adopted, phase response of multiple layers of synchronous marks is collected and normalized, multi-dimensional alignment reference features are extracted, a distribution alignment error model is established, overall rigid displacement and local stress deformation are distinguished, exposure equipment parameters are corrected in real time based on the model, and space error compensation is achieved.

The application provides a remote acoustic signal pickup method and system based on phase coding microwave sensing, comprising: constructing a phase coding matrix, and performing phase shift control on the transmission signals of multiple transmission antennas; controlling the multiple transmission antennas to simultaneously transmit a linear frequency modulation continuous wave signal, so that the main lobe of a synthesized beam is directed towards the direction of a to-be-detected acoustic source or the direction of a target medium; using one or more receiving antennas to receive echo signals of the acoustic source target, to obtain a corresponding number of baseband signals; performing acoustic vibration phase demodulation on the corresponding number of baseband signals, to extract vibration information of the surface of the medium target caused by the vibration information of the acoustic source or caused by the excitation of the acoustic wave; and reconstructing the acoustic signal, to realize remote acoustic pickup. The application overcomes the problems of weak echo signals, low signal-to-noise ratio, large adjacent target interference and low quality of reconstructed acoustic signals in remote acoustic pickup, and improves the signal-to-noise ratio and sensing distance of remote acoustic pickup.

The application discloses a kind of light field regulation detection method and device based on computing spectral reconstruction, belong to spectral analysis technical field.The method is by introducing medium-metal composite nanostructure, integrates metal nanoisland array and silicon nitride nanocolumn array on quartz substrate, realizes electric field enhancement using the local surface plasmon resonance effect excited by metal nanoisland array, simultaneously realizes wide spectral range phase coding by medium nanocolumn array;Super surface chip is integrated with single point detector, combines pre-calibrated super surface sensing matrix A and enhancement factor matrix E, and reconstructs spectrum using compressed sensing or Tikhonov regularization algorithm.The application keeps the advantages of miniaturization and no moving parts, realizes directional high sensitivity detection to weak signal, and signal-to-noise ratio is improved.

The present invention relates to a method for MR imaging of an object (10) placed in an examination volume of an MR device (1). One object of the present invention is to achieve high-quality diffusion-weighted imaging (DWI) without distortion while minimizing artifacts caused by motion. The method of the present invention comprises the following steps: subjecting the object (10) to a dual-echo steady-state imaging sequence, generating a free induction decay signal (FID) and an echo signal (ECHO) in each interval between two consecutive RF pulses, wherein a pair of diffusion gradient waveforms (G) with equal phase integrals and opposite polarities are applied in the interval between the FID signal and the echo signal. DIF ); acquiring the FID signal and the echo signal in several repetitions of an imaging sequence with varying phase encoding; and reconstructing a diffusion-weighted MR image based on the acquired FID signal and echo signal. The present invention also relates to an MR device for performing the method and a computer program to be run on the MR device.

The application discloses a terahertz metasurface reflection unit based on a MEMS switchable delay line, and belongs to the field of radio frequency front-end devices.The unit adopts a sandwich structure of upper and lower glass substrates and a middle bonded metal surface, and a metal radiation patch, a phase delay line and a MEMS switch are integrated on the upper surface.The core is to control the on-off state of the phase delay line through the MEMS switch: when the switch is turned off, the unit is in a reference electrical length;when the switch is turned on, the current path is lengthened, so that the reflection phase lags by about 180 degrees, thereby realizing 1-bit phase coding.The design ingeniously combines the MEMS switch and the delay line, has the advantages of low driving voltage, low reflection loss and high phase control precision in the terahertz frequency band, and provides a feasible hardware solution for the practical application of a reconfigurable intelligent surface in a terahertz communication system.

The present application provides a quantum state decoding device, method, and software-defined quantum communication system. The device includes: a first optical coupling unit, a polarization-to-time phase encoding unit, a first transmission optical path, a second optical coupling unit, and a time phase decoding unit. The polarization-to-time phase encoding unit is used to perform time phase encoding conversion on input polarization-encoded quantum state optical pulses and output time phase-encoded quantum state optical pulses. The time phase decoding unit can decode and output the time phase-encoded quantum state optical pulses. The first optical coupling unit and the second optical coupling unit can control the output of time phase-encoded quantum state optical pulses from any optical output branch according to quantum communication decoding control instructions. In this way, the decoding methods of time phase encoding and polarization encoding can be compatible in a quantum state decoding device.

The embodiment of the invention is suitable for the technical field of communication, and provides a phase encoding method and device and communication equipment, and the method comprises the steps: determining the number of a plurality of bits needed for encoding a plurality of phases according to the plurality of phases to be encoded; generating a first-order term and a high-order term of a plurality of bits; based on the multiple phases, the first-order term and the high-order term, a bit matrix is constructed, and the bit matrix is formed by combining multiple values of multiple bits; calculating a plurality of coding coefficients according to the bit matrix and the plurality of phases; a plurality of phases are encoded using a plurality of encoding coefficients. By the adoption of the method, redundant codes generated in the coding process can be reduced, and then the solving speed and quality of an optimization algorithm are improved. The method can be applied to any coding process in which a coding object is a discrete value.

The invention discloses a phase coding optoelectronic oscillator with an adjustable duty ratio and an implementation method thereof, and relates to the technical field of photoelectricity. The optoelectronic oscillator comprises a laser, a Mach-Zehnder modulator, a single-mode fiber, a photoelectric detector, an electric amplifier, an electric band-pass filter and an electric power divider which are connected in sequence; a direct current port of the intensity modulator is connected with the function generator, one path of the electric power divider serves as output, and the other path is connected with a radio frequency port of the intensity modulator; the output voltage of the preset function generator jumps between the two linear bias points and the minimum bias point of the Mach-Zehnder modulator, so that the direct output of the phase-coded microwave signal with the adjustable duty ratio is realized. According to the invention, the coherence of the phase coding microwave signal is good, the phase noise is low, the duty ratio is adjustable, the coding flexibility is high, the structure is simple, and the equipment cost is low.

The application discloses a kind of asymmetric color image optical encryption methods based on generalized singular value decomposition, including encryption process and decryption process, encryption process: asymmetric optical encryption system of color image, the technical scheme adopted is, in encryption system, a kind of double random phase encoding encryption scheme based on generalized singular value decomposition is designed, color image is first encoded into complex matrix, the complex matrix obtained is modulated with phase plate by generalized singular value decomposition, then encryption is carried out in optical Fourier transform domain using phase truncation technique, finally the ciphertext is received by charge coupled device.The application mainly aims at the problem that existing asymmetric encryption system based on phase truncation cannot resist special attack, a kind of modulation method based on generalized singular value decomposition is designed to image and random phase plate, the encryption algorithm can realize color image encryption, effectively resist shear attack, noise attack, chosen-plaintext attack and special attack.

In a method for creating an image dataset of a mapping area situated in a measuring volume, k-space corresponding to the mapping area may be read out and image data may be reconstructed based on recorded first and second raw data points of k-space. The reading out of k-space may include: switching a gradient in the slice selection direction and a phase-encoding gradient in at least one further encoding direction, radiating a non-slice-selective radio-frequency (RF) excitation pulse, recording echo signals and storing them as first raw data points along a radial k-space trajectory predefined by the full strength of the phase-encoding gradients (Gp) further switched during recording of the echo signals, and reading out k-space corresponding to the mapping area as second raw data points.

This invention relates to a sensing-integrated waveform design method based on OFDM time-frequency domain phase coding, belonging to the field of wireless communication technology. In this method, the transmitting end generates a complementary Gray sequence and a pseudo-random sequence. These two sequences are then divided into blocks in the frequency domain according to their indices and phase-coded to generate a sensing waveform. A communication signal is generated through an OFDM system. The frame header of the sensing waveform is aligned with the start position of the SSB of the communication signal to generate a sensing-integrated waveform. The time slot of the transmitted communication signal is used; this waveform is the result of multiplying the communication waveform and the sensing waveform in the time domain; otherwise, the waveform is the sensing waveform. The receiving end shares the synchronization signal block and the sensing waveform. The SSB portion of the bandwidth signal is extracted from the received echo signal to estimate the time-frequency, and the echo signal is compensated. The sensing waveform is then separated from the compensated signal to reconstruct the communication signal. The waveform generated by this invention can effectively eliminate spurious peaks in the OFDM waveform, improving the sensing accuracy of the waveform without sacrificing communication performance.

The present invention discloses a method for designing discrete constant modulus quadrature phase coding for multiple targets. The method comprises the following steps: S1: determining the number of waveform signals M and the number of code elements N of each waveform of a multi-input multi-output radar, and randomly generating training samples of a size of M×N; S2: calculating the distance of a range gate and the waveform correlation function, and setting a loss function based on the distance and correlation function; S3: inputting the training samples into an established phase coding network for training, performing modulo-1 and discretization processing on the network output to obtain discrete constant modulus phase coding; S4: calculating the coding loss value based on the loss function, and updating the network parameters based on the loss value; S5: proceeding to S6 upon completion of training, otherwise returning to S3; S6: obtaining a trained network, inputting the data to be coded into the trained network, and obtaining a discrete constant modulus quadrature phase coded signal. This method enables the multi-input multi-output radar to operate normally in multi-target scenarios, and the output is a discrete code, which is more suitable for practical applications.

A system (200, 300, 400, 500) and method are provided for an implementation of a phase-coded transmitter front-end architecture for a multiple input, multiple output (MIMO) radar system. This architecture achieves broadband operation, supports major power savings, delivers high wireless power, and operates in the near-THz range. Power combining implementations are also provided.

The application relates to the technical field of optical imaging, and provides a visual information display method and device, AR equipment and a storage medium, the method comprises the following steps: acquiring a first light field corresponding to visual information output by AR equipment; performing phase encoding on the first light field to obtain a corresponding second light field; acquiring current line-of-sight focal point information of a wearer of the AR equipment; based on the line-of-sight focal point information, demodulating the second light field to obtain a corresponding third light field, and presenting the visual information to the wearer through light rays of the third light field. The embodiment of the application improves the security of visual information display based on the AR equipment.

The invention discloses a logistics scheduling management method based on an ant colony algorithm. The method comprises the following steps: constructing a logistics network model constrained by a capacity time window; carrying out ant colony search to generate a scheduling scheme set and carrying out local modeling to obtain a scheduling constraint manifold; converting the scheduling scheme into a vehicle event graph and introducing a time phase to obtain an event phase code; defining a manifold projection operator on the scheduling constraint manifold, mapping an event phase code into a feasible code, and setting a water wave parameter according to a difference value; a water wave model with event phase codes as individuals is constructed, candidate codes are generated through translation, torsion and event subgraph reconnection, and projection is feasible; constructing a cost field and a risk field according to the transportation cost and the time window default risk, and updating event phase codes and ant colony parameters according to a gradient; and when the model converges, outputting a logistics scheduling scheme and generating a vehicle warehouse instruction. Scheduling constraint manifold and water wave optimization are introduced on the basis of ant colony search, and cost and risk are balanced under capacity constraint.

The application relates to a radio frequency coil design method for transmit array spatial encoding imaging, and belongs to the technical field of magnetic resonance imaging. In view of the problems of low single-dimension coding efficiency, strong coupling interference between coils and nonlinear phase gradient of a traditional TRASE technology, axial and radial coding coils are designed based on a target field method and a magnetic dipole method, two-dimensional radio frequency phase coding is realized through reverse current solenoid decoupling combination, and excitation and signal receiving are realized in combination with a saddle coil. Through optimization of the coil structure and decoupling design, the technical scheme achieves multi-dimensional efficient coding, high-precision phase gradient, strong anti-interference and system light weight, and is suitable for the portability and dynamic monitoring scene of low-field magnetic resonance.

A millimeter-wave automotive radar is disclosed that includes a plurality of millimeter-wave transmitters configured to simultaneously transmit phase-encoded signals according to a phase modulation scheme, and a plurality of subarrays operatively coupled to respective ones of the plurality of millimeter-wave transmitters, each subarray including a predefined number of transmitter elements, and configured to transmit the phase-encoded signals received from a respective one of the millimeter-wave transmitters from other subarrays in different, mutually orthogonal time slots using time division multiplexing.