57 results about "Channel modulation" patented technology

The invention relates to the technical field of optics, in particular to a low-crosstalk channel modulation interference polarization spectrum detection method and system, and the system comprises a half-field telescopic module, a phase modulation module, an interference modulation module and a detection module. The half-view-field telescope module is used for performing lower half-view-field beam collimation on an input target beam, the target beam is propagated to the phase modulation module in parallel according to a set range, a composite polarization splitting prism group in the phase modulation module performs light splitting operation based on the target beam output by the half-view-field telescope module, and two parallel polarized lights are emitted, independent phase modulation of the two paths of light is ensured; and the interference modulation module is used for performing light splitting modulation according to the two paths of polarized light to ensure that the two paths of modulated polarized light beams interfere with each other and are transmitted to the detection module for imaging. According to the system, the detection precision of a narrow-band polarization spectrum or a polarization spectrum with an obvious narrow-band wave crest and a narrow-band absorption peak is improved, the polarization spectrum detection capability is high, and the application range is wide.

Aspects of the present disclosure relate generally to systems and methods for use in the implementation and / or operation of quantum information processing (QIP) systems, and more particularly, to a double individual-addressing multi-beam Raman system for use in QIP systems. A technique is described in which a first multi-channel modulator (MCM), a first telecentric zoom lens, and a first interleaver that form a first optical path of the Raman system that receives a first array of beams and adjusts the first array of beams to individually address atomic-based qubits in a chain from a first direction. Moreover, a second MCM, a second telecentric zoom lens, and a second interleaver form a second optical path of the Raman system that receives a second array of beams and adjusts the second arrays of beams to individually address the atomic-based qubits in the chain from a second direction different from the first direction.

The invention relates to the technical field of artificial intelligence and power grid management, in particular to a power consumption dynamic prediction method based on physical-semantic dual-channel modulation. A power consumption prediction model is trained, and power consumption is predicted based on power load time sequence data; the power consumption prediction model comprises a physical perception path, a semantic perception path, a fusion module and a liquid core computing architecture. According to the method, the physical perception path endows the model with the quick response capability to transient modes such as load sudden change, the semantic perception path ensures deep mining of a long-term periodic rule, and the physical perception path and the semantic perception path realize adaptive cooperation through gating fusion, so that the modeling and prediction precision of a complex non-stationary power load sequence is comprehensively improved.

The invention provides a lightweight SAR ship detection method based on an efficient attention mechanism. The lightweight SAR ship detection method comprises the steps of inputting a to-be-detected SAR ship image into a pre-trained lightweight ship detection model; feature extraction is carried out on the SAR ship image to be detected through the backbone network, the extracted features are fused through the neck network, and the fused features are predicted through the detection head to obtain a ship detection result; wherein each of the backbone network and the neck network comprises a feature extraction module ECMA-MF and a downsampling module ECAA-DS; the feature extraction module ECMA-MF is constructed based on a MetaFormer architecture and an efficient channel modulation attention mechanism, and is used for enhancing ship features and inhibiting background interference; the downsampling module ECAA-DS includes a packet convolution branch and an efficient channel aggregation attention branch for enriching ship features while downsampling. According to the method, the accuracy, the robustness and the real-time performance of SAR ship detection can be improved.

The invention discloses a single side band time modulator with ultra-wideband instantaneous bandwidth. The single side band time modulator is provided with an orthogonal generation unit, an I-path modulation unit, a Q-path modulation unit, an output buffer unit and a time sequence control unit. Radio frequency input differential signals RFin + and RFin-are connected with the orthogonal generation unit, the output of the orthogonal generation unit is connected with the I-path modulation unit and the Q-path modulation unit, then input signals are modulated in the I-path modulation unit and the Q-path modulation unit respectively, the output end of the output buffer unit is the output end of the single-side-band time modulator, a modulation signal RFout is output at a single end, and the output end of the output buffer unit is connected with the output end of the single-side-band time modulator. The digital time sequence unit controls the I-path modulation unit and the Q-path modulation unit to realize vector modulation, so that a single sideband time modulation function is realized, extremely high modulation frequency input is realized, and the ultra-wideband instantaneous bandwidth is realized.

The invention relates to the technical field of digital information secure transmission, in particular to a data information secure transmission method and system. The method comprises the following steps of: performing differential quantization and coding on original measurement data of a power grid to obtain a parameter feature code vector; constructing a power grid disturbance response matrix according to the parameter feature code vector to obtain a disturbance response matrix; acquiring to-be-transmitted data; performing information channel modulation on the to-be-transmitted data according to the disturbance response matrix to obtain a modulation parameter sequence; performing time interleaving analysis according to the modulation parameter sequence to obtain a time interleaving data stream; obtaining power grid topology information; performing space-time fusion coding transmission according to the power grid topology information and the time-interleaved data stream to obtain a space-time interleaved code stream; and performing spatio-temporal de-interleaving processing on the spatio-temporal interleaving code stream to obtain a channel data block set. According to the invention, the security, reliability, concealment and high adaptability of data information transmission are improved through a digital information security transmission technology.

The present invention discloses a method for implementing flexible rate: an optical receiving component in the client receives an optical signal from the host with an optical power value of P1, and monitors the received optical power P1 to calculate the received optical power value P r ; wherein, after the host and the client are correctly deployed, a normal communication mechanism is established through the NRZ code pattern; compensating for the optical power value P r to calculate the current received power P test of the client, and calculating the power difference ΔP between the current received power P test of the client and the optical receiving sensitivity value P0 of the optical receiving component; comparing the power difference ΔP with a previously predetermined threshold to determine which modulation format the downstream channel can be adjusted to, and using the determined modulation format as the first uplink frame to be sent from the client to the host, so that after the host receives the first uplink frame, it adjusts the downstream channel modulation format according to the determined modulation format to achieve flexible code pattern change. The present invention also provides a corresponding device for implementing flexible rate.

A method, apparatus and system for per-channel MER calibration and determination on a multi-channel receiver.

The utility model relates to an HEMT (High Electron Mobility Transistor) device, comprising a body which is provided with a top surface and comprises a heterostructure configured to generate two-dimensional charge carrier gas; and a gate structure extending on a top surface of the body and capable of being biased to electrically control a two-dimensional charge carrier gas, the gate structure comprising: a channel modulation region of a semiconductor material, the channel modulation region having a top surface; a functional region of a semiconductor material; a first gate contact region of conductive material; a second gate contact region of an electrically conductive material, the second gate contact region extending at least partially over the functional region and in contact with the first gate contact region, where the functional region and the first gate contact region extend over a top surface of the channel modulation region, and where the first gate contact region is arranged laterally with respect to the functional region, the channel modulation region has different conduction types relative to the functional region; and an insulating region of a non-conductive material, the insulating region between the first gate contact region and the second gate contact region.

This application provides a method and apparatus for detecting channel modulation schemes. The method includes: hard demodulating the modulation data to be detected according to each modulation scheme in a candidate modulation scheme group to obtain demodulated bit sequences corresponding to each modulation scheme, forming a first demodulated sequence set; modulating the sequences in the first demodulated sequence set according to corresponding modulation schemes to obtain a modulation sequence set; obtaining error feature values ​​corresponding to each modulation scheme based on the modulation data to be detected, the modulation sequence set, and the feature value correction factors corresponding to each modulation scheme; and selecting the modulation scheme corresponding to the smallest error feature value as the modulation scheme of the modulation data to be detected. The technical solution of this application embodiment can improve the efficiency of the channel modulation scheme detection process.

The invention relates to a high-precision current copying circuit, and aims to solve the problem of current mirror copying precision caused by a channel modulation effect in a large-proportion current mirror copying process. The circuit comprises a current mirror copy tube, a negative feedback module and an adjusting tube. The grid voltage of the current mirror copying tube is externally input, and the negative feedback module is used for controlling the grid control voltage of the adjusting tube, so that the voltages at the Vsens end and the VBAT end in the circuit are kept the same, and the current copying precision is improved. And the negative feedback module samples and compares the voltages at the VBAT end and the VSENS end to generate a control signal to adjust the grid voltage of the adjusting tube, so that the drain-source voltage of the current mirror copy tube is controlled. In addition, the circuit also comprises a voltage stabilizing structure which is used for preventing the influence of power supply voltage fluctuation on the control node. The test result shows that the circuit can realize high-precision current copying when the current mirror proportion is 1: 1000, and the voltage at the VBAT end and the VSENS end is approximately the same in the change process, so that the circuit is suitable for application occasions with higher requirements on the current copying precision.

Methods, systems, and devices for channel modulation for a memory device are described. A system may include a memory device and a host device coupled with the memory device. The system may be configured to communicate a first signal modulated using a first modulation scheme and communicate a second signal that is based on the first signal and that is modulated using a second modulation scheme. The first modulation scheme may include a first quantity of voltage levels that span a first range of voltages, and the second modulation scheme may include a second quantity of voltage levels that span a second range of voltages different than (e.g., smaller than) the first range of voltages. The first signal may include write data carried over a data channel, and the second signal may include error detection information based on the write data that is carried over an error detection channel.

Aspects of the present disclosure relate generally to systems and methods for use in the implementation and / or operation of quantum information processing (QIP) systems, and more particularly, to a double individual-addressing multi-beam Raman system for use in QIP systems. A technique is described in which a first muti-channel modulator (MCM), a first telecentric zoom lens, and a first interleaver that form a first optical path of the Raman system that receives a first array of beams and adjusts the first array of beams to individually address atomic-based qubits in a chain from a first direction. Moreover, a second MCM, a second telecentric zoom lens, and a second interleaver form a second optical path of the Raman system that receives a second array of beams and adjusts the second arrays of beams to individually address the atomic-based qubits in the chain from a second direction different from the first direction.

The embodiment of the present application provides a kind of multimode dual-channel optical communication integrated device and implementation method, comprising: by buffer layer surface successively integrated first light source module, second light source module, mode multiplexing module, optical modulation module and dual-channel output module;By first light source module, first wavelength optical signal is sent and is transmitted to mode multiplexing module;By second light source module, second wavelength optical signal is sent and is transmitted to mode multiplexing module;By mode multiplexing module, first wavelength optical signal is combined with second wavelength optical signal as composite optical signal;By optical modulation module, composite optical signal is modulated to obtain dual-channel modulation signal;By dual-channel output module, dual-channel modulation signal is separated into independent first wavelength signal and second wavelength signal and is output to external optical communication system.

The invention discloses a satellite wireless communication modulation and coding method and system based on a bit error rate and a signal-to-noise ratio. The method comprises the following steps: acquiring satellite communication signal parameters; acquiring a real-time channel error rate according to the satellite communication signal parameter, and acquiring a real-time satellite communication channel signal-to-noise ratio if the channel error rate exceeds a first threshold value of a service communication error rate performance index; adjusting the channel signal-to-noise ratio, the channel modulation mode and the information source coding mode based on the channel signal-to-noise ratio, obtaining a real-time channel error rate after adjusting the information source coding mode, and adjusting the channel coding mode if the channel error rate exceeds a first threshold value of a service communication error rate performance index; after the channel coding mode is adjusted, a real-time channel error rate is obtained, and whether satellite wireless communication modulation and coding are successful or not is judged. According to the method, the problem that the channel quality is influenced by long-distance transmission and complex environment in satellite communication is solved, the channel data transmission quality of satellite communication is remarkably improved, and the error rate is ensured to be lower than a service demand threshold value.

Aspects of the present disclosure generally relate to systems and methods for use in implementing and / or operating a quantum information processing (QIP) system, and more particularly, to a dual individually addressable multi-beam Raman system for use in a QIP system. Techniques are described in which a first multi-channel modulator (MCM), a first telecentric zoom lens, and a first interleaver form a first optical path of the Raman system, the first optical path receiving an array of first beams and conditioning the array of first beams to individually address atom-based quantum bits in the chain from a first direction. Also, a second MCM, a second telecentric zoom lens, and a second interleaver form a second optical path of the Raman system, the second optical path receiving an array of second beams and conditioning the array of second beams to individually address atom-based quantum bits in the chain from a second direction.

The invention discloses a gamepad attitude resolving and self-calibration method based on multi-sensor fusion. The system is composed of a data fusion layer, a self-calibration state detection layer and a state interpretation and feedback layer, the three layers complete attitude estimation, state calibration and result interpretation in sequence, and self-adaptive optimization is achieved through closed-loop adjustment between result sets. According to the method, a dual-channel adaptive confidence stability modulation algorithm is introduced, two core mechanisms including a confidence coefficient dual-channel modulation mechanism and a stable time dual-channel modulation mechanism are established and used for cooperatively evaluating the reliability and the stability of a posture result, and system parameter adaptive adjustment and posture result output are driven at the same time through a dual-layer feedback mechanism. Therefore, dynamic balance between robustness and responsiveness is realized, and the precision and interpretability of attitude calculation are improved.

The invention relates to the technical field of signal processing, and provides a multi-channel pulse low and medium frequency signal generation system, which comprises a signal generation unit used for generating a multi-channel pulse signal, a low frequency signal and a carrier signal; the multi-channel pulse signal modulation unit is used for modulating the multi-channel pulse signal to generate a multi-channel modulation pulse signal; the power control unit is used for performing power control on the low-frequency signal and the multi-channel modulation pulse signal to generate a target low-frequency signal and a multi-channel target pulse signal; and the low and medium frequency signal modulation unit is used for synthesizing the target low frequency signal, the multi-channel target pulse signal and a carrier signal to generate a multi-channel pulse low and medium frequency signal. According to the system, through multi-channel pulse signal modulation and power control, multi-channel pulse low and medium frequency signals are accurately generated, and the flexibility and adaptability of the signals are enhanced.

The application relates to the technical field of optics, in particular to a low-crosstalk channel modulation interference polarization spectrum detection method and system, which comprises a half-field telescope module, a phase modulation module, an interference modulation module and a detection module; the half-field telescope module is used for collimating an input target light beam in a lower half field, the target light beam is parallelly transmitted to the phase modulation module according to a set range, a compound polarization beam splitter prism group in the phase modulation module performs a light splitting operation based on the target light beam output by the half-field telescope module, two parallel polarization lights are emitted, and independent phase modulation of the two lights is ensured; the interference modulation module is used for performing light splitting modulation according to the two polarization lights, ensuring that the two polarization light beams after modulation interfere and are transmitted to the detection module to be imaged. The system improves the detection precision of narrow-band polarization spectrum or polarization spectrum with obvious narrow-band wave peaks and narrow-band absorption peaks, and has strong polarization spectrum detection capability and wide application range.

The application discloses a deep cycle hyperspectral image processing method for marine subpixel target recognition. The hyperspectral image processing method provided by the application is based on simultaneous feature extraction of high and low resolution feature spaces, combines multi-channel segmentation adaptive weighting and channel modulation spectral information processing technology, utilizes a network combining spatial spectrum to perform parallel unmixing on two types of information, and significantly improves unmixing precision in a complex scene. The application can efficiently unmix and accurately classify complex spectral and spatial information in a hyperspectral image, has strong robustness and adaptability, is particularly suitable for marine environment monitoring, resource exploration and environmental protection and the like, can overcome the deficiency of traditional methods in high-dimensional features and generality in complex landform spectral separation and classification, and has important application value.

The invention discloses a control method and device based on a channel modulation formula and a storage medium, and belongs to the technical field of material matching. The method comprises the following steps: determining a material adding sequence and a material formula weight in a formula information table; according to the material adding sequence, a target material channel where materials to be added are located is determined, and the target material channel is controlled to be opened, so that the materials in the target material channel are converged into the container; and when the real-time weight of the material added to the target material channel is equal to the formula weight, closing the target material channel. The material channel of the to-be-added material is determined and opened by recognizing the formula information table input by the dosing personnel, meanwhile, the real-time weight fed back by the weight sensor of the container is received in real time, the real-time weight is compared with the formula weight to determine opening and closing of the target material channel, accurate dosing can be achieved, and the preparation efficiency of the electronic cigarette atomized liquid is improved.

A method for operating a multi-channel acousto-optic modulator includes obtaining (S20) print data for a plurality of channels of the multi-channel acousto-optic modulator. The radio frequency signal is modulated (S30) for each of the plurality of channels based on the print data. The modulated radio frequency signal is provided (S40) via the electrical input connector to a corresponding transducer of the multi-channel acousto-optic modulator. For at least one channel, the modulation of the radio frequency signal comprises crosstalk cancellation (S32). Wherein the modulated radio frequency signal is compensated by a modulated radio frequency signal of at least electrically adjacent channels among the electrical input connectors scaled by a predetermined factor and phase shifted by a predetermined phase difference. A method for calibrating a multi-channel acousto-optic modulator, a control unit for a multi-channel acousto-optic modulator and a pattern generator are also presented.

The embodiment of the invention provides a signal modulation method combining up-sampling and shaping filtering in a modulation process. The method comprises the following steps of: sending a code element value lookup table (1), then accumulating an impulse response sequence (8) after I-path table lookup and an impulse response sequence (9) after Q-path table lookup at a T0-Tn moment according to an up-sampling mode (7) to obtain an I / Q value (10) at the T0-Tn moment, and then forming a sending waveform signal through subsequent digital up-conversion and DA signal output. In the table lookup process, a single code element value (2) is decomposed into an I sequence value and a Q sequence value (3), the modulation and shaping filtering joint lookup table (4) is looked up respectively, and an I-path modulated impulse response sequence (6) and a Q-path modulated impulse response sequence (5) are obtained. The method has the advantages that the modulation and shaping filtering combined lookup table is utilized, the modulation process, up-sampling and shaping filtering combined calculation is realized, multiplication in the modulation and filtering process is eliminated, and the operand is saved.

The invention discloses an image segmentation method and system based on local-global fusion and channel modulation, and relates to the technical field of image segmentation, and the specific steps are as follows: coding an input remote sensing image through the combination of a local-global fusion attention module and a depth estimation module, and outputting a multi-scale fusion feature map; performing feature compression and segmentation, cross fusion, channel modulation and adaptive weighting on the multi-scale fusion feature map, and outputting a modulation feature map; and recovering the spatial resolution of the modulation feature map through step-by-step up-sampling and convolution, and performing segmentation to generate a pixel-level category prediction map. According to the method, the spatial distribution consistency of the features is optimized, the category consistency of the overall segmentation result is improved, the category confusion phenomenon is reduced, and the method is particularly suitable for a complex remote sensing image segmentation task containing multi-category and multi-scale targets.

The invention discloses a method for processing data loss caused by frequency offset in request-system satellite data transmission, and belongs to the technical field of satellite communication. The two-channel modulator of the dual-channel request system satellite respectively sends request frames to the data processor, and the request frames are combined and then output to the solid-state memory; the solid-state memory sends playback data of a corresponding data frame number of a single path to the data processor according to the frame number of the received request frames; the data processor averagely divides the received single-path playback data into two paths, respectively performs data processing, and generates a full identification signal; after data processing is completed, the data are output to a two-channel modulator according to the number of request frames of the path; when the full identification signal of any one of the two channels is 1, request frame combination is stopped, and at the moment, the solid-state memory pauses data playback. By detecting the capacity of the cached data in the caches in the two coding processing units in real time, the problem of data loss caused by frequency offset of a modulator clock crystal oscillator in satellite request system data transmission is reliably solved in real time.

The application relates to the field of artificial intelligence and feature enhancement technology, and provides a multi-head dynamic soft gating method based on cross-layer visual attention propagation trajectory bias, which comprises the following steps: acquiring a visual token sequence; calculating the weight of multi-head attention and single-head output; constructing a trajectory vector containing at least attention intensity, active attention intensity, entropy, change rate, divergence, historical gating, CLS bidirectional attention, CLS rollout accumulation and spatial neighborhood mean by using cross-layer attention; layer-in standardization; projecting into a bias injection current token representation; combining the bias representation and the trajectory to generate a layer-by-layer, head-by-head, token-by-token and channel-by-channel gating; writing into a cache, and obtaining an effective gating through strength coefficient conversion, and then modulating channel by channel before splicing; splicing and modulating output and projecting. The method can inhibit redundant propagation, retain token sequences and enhance foreground representation.

The invention discloses an underwater image enhancement method and system based on conditional collaboration and multi-scale observation, and the method comprises the steps: constructing a multi-scale degradation observation sequence for an original underwater image, and carrying out the multi-stage dual-domain conditional collaboration coding under the condition of the multi-scale degradation observation sequence. Channel domain modulation and spatial domain condition compensation are carried out in parallel in each level: channel modulation features are generated through channel attention and cross-branch interaction, spatial degradation is compensated through directional high and low frequency decomposition and weighted modulation, and conditional collaborative fusion of double-domain features is realized under the constraint of fusion weight generated by channel domain modulation. Structural prior features are extracted from a low-resolution observation image, and are fused with corresponding scale coding features to introduce physical constraint information. And outputting an enhanced image through cross-scale decoding and residual reconstruction. Collaborative optimization of color correction and structure detail recovery is realized under a unified framework, and the visual quality and the structure authenticity of an underwater image under a complex degradation scene and the robustness of an enhancement result are effectively improved.

The inventions relate to compositions and articles of manufacture comprising connexin modulators, pannexin modulators, gap junction modulators, hemichannel modulators, and pannexin channel modulators and their use, alone or in combination, in treating ocular and other disorders.

The present invention relates to a multi-axis motor pipeline control system based on FPGA and a control method thereof, comprising a motor operation circuit, a pipeline control circuit, a multi-channel data acquisition circuit, a multi-channel interface circuit and a multi-channel modulation output circuit; the pipeline control circuit provides a first timing sequence, and the sampling data of all motor shafts and the motor motion control instructions are polled and input into the motor operation circuit according to the first timing sequence; the motor operation circuit calculates the error adjustment data of each motor shaft according to the first timing sequence; the pipeline control circuit also provides a second timing sequence, and all modulation output circuits poll and receive the error adjustment data according to the second timing sequence; the modulation output circuit receives the error adjustment data of the corresponding motor shaft according to the second timing sequence, and calculates the corresponding three-phase duty ratio modulation signal and outputs it to the corresponding motor. The present invention only needs one motor operation circuit no matter how many motor shafts there are, realizes the parallel control of multi-axis motors in a pipeline manner, and reduces the occupied resources of FPGA exponentially.

Disclosed are a photonic multiband filter and a method of operating the same. The photonic multiband filter includes an optical frequency comb that forms multiple optical channels based on a single light source incident from an outside, a modulator that applies an RF signal modulated into an optical domain among a plurality of RF signals to the multiple optical channels, and a pulse shaper that determines a center frequency, a bandwidth, and a passband shape of the RF signal modulated into the optical domain including the multiple optical channels.