251 results about "Spectrum band" patented technology

The invention relates to the technical field of remote sensing spectrums, in particular to an urban black and odorous water body recognition method and system based on remote sensing spectrums. The method comprises the following steps: acquiring infrared spectrum and visible spectrum data based on a remote sensing satellite or an unmanned aerial vehicle, processing the data, eliminating noise and abnormal values in the data, and extracting spectral features to obtain a spectral feature data set; according to the invention, through infrared and visible spectrum data collected by a remote sensing satellite or an unmanned aerial vehicle and through combination with urban water body data of a geographic information system, the dimension and quality of the data are improved, so that monitoring of the urban black and odorous water body is not limited to surface coverage, and sensitivity of data analysis can be accurately regulated and controlled by dynamically adjusting a spectrum band weight; the method has the advantages that the method adapts to variable environmental conditions, recognition precision of various polluted water bodies is improved, continuity and accuracy of long-term monitoring are guaranteed by continuously updating and optimizing the processing flow, and urban water quality management and decision-making processes are effectively supported.

The invention relates to the technical field of spectrum detection, in particular to a multi-spectrum single-gas-chamber multi-gas self-defined detection method and system.The surface of a cavity mirror of an integral cavity is subjected to regional film coating according to detection requirements, multiple annular reflection regions and a circular reflection region are formed through film coating, the central wavelengths reflected by different reflection regions are different, and the central wavelengths are different; corresponding to absorption peaks of different gases, in order to overcome the limitation of a detector on a detection wave band and optimize a detection light path, a central light beam turning structure is arranged on a light path of an emergent end of the integral cavity and is used for changing the propagation direction of transmission light of a circular reflecting region, so that the transmission light enters a second detection device; the transmission light of the annular reflection area is incident to the first detection device, the problem that the detection spectrum of a traditional detection system is limited by the response range of a single detector is solved, and the detection system can detect and cover a wide range from short waves to long waves by customizing the working spectrum of the two detection devices.

Methods, systems, and devices for wireless communications are described. A wireless communication device may receive, via a first radio frequency spectrum band, a control message that includes an uplink grant for sending one or more backscattered uplink messages via a second radio frequency spectrum band that is higher than in frequency than the first radio frequency spectrum band and separated from the first radio frequency spectrum band by at least a threshold frequency gap. The wireless communication device may then receive a continuous waveform via the second radio frequency spectrum band, and modulate the continuous waveform with uplink data of the one or more backscattered uplink messages. The wireless device may then send, via the second radio frequency spectrum band, a backscattered signal of the continuous waveform based on modulating the continuous waveform with the uplink data.

In an example, a method is implemented in a radar system. The method may include transmitting, via transmission channels, a frame of chirps, the chirps transmitted having a programmed frequency offset that is a function of a transmission channel of the transmission channels that is transmitting the frame of chirps, receiving, via a receive channel, a frame of reflected chirps, the reflected chirps comprising the chirps reflected by an object within a field of view of the radar system, and determining a Doppler domain representation of the frame of reflected chirps having a Doppler domain spectrum that includes multiple spectrum bands, the object represented in at least a portion of the spectrum bands based on the reflected chirps, wherein the programmed frequency is configured to cause the Doppler domain spectrum to include a number of spectrum bands greater than the number of transmission channels.

The invention provides a method for predicting a single event effect induced failure rate of an FPGA (Field Programmable Gate Array) system in radiation. The method comprises the following specific steps: representing a radiation environment of the FPGA system; determining the sensitivity of the single particle effect of the FPGA system in the radiation environment; and establishing a fluence domain reliability model of the FPGA system in the radiation environment: converting the characteristics of the single event effect cross section sigma SEE into a corresponding average fault-free fluence MFTF, and establishing an FPGA system reliability model of each energy spectrum band or LET spectrum band in a given radiation fluence according to the average fault-free fluence MFTF and the total number phi of particles passing through a unit area in a radiation field. According to the method, physical process analysis and data driving means are combined, and the fluence domain reliability model is established, so that the reliability of related equipment in a special physical environment is improved.

The invention discloses a space-air-ground integrated broadband narrowband adaptive emergency communication system, and relates to the technical field of space-air-ground integrated communication, and the system comprises a communication management center, a spectrum environment sensing module which is used for monitoring the use condition of each spectrum bandwidth through spectrum monitoring equipment disposed at each layer of space, air and ground, and sending the use condition of each spectrum bandwidth to the communication management center; comprising spectrum utilization rates of broadband and narrowband services, and constructing a dynamic spectrum map; and the demand prediction module is used for predicting spectrum demands of future broadband and narrowband services in combination with the historical communication data and the current network state. Through the dynamic spectrum allocation technology and in combination with 5G waveforms, spectrum resource allocation can be adjusted in real time according to actual service requirements and network conditions, resource waste or insufficiency in a traditional fixed spectrum allocation mode is avoided, the utilization rate of spectrum resources is remarkably improved through intelligent spectrum management, and the spectrum allocation efficiency is improved. The efficient cooperative work of broadband and narrowband services is ensured, and reliable spectrum guarantee is provided for emergency communication.

A communication system is disclosed in which communication between a UE and a base station occurs in uplink only, downlink only, or full duplex, slots or symbols. Frequency resources are configured for communication in full duplex slots that include frequency resources for an uplink subband and / or frequency resources for a downlink subband. The frequency resources for the uplink subband, or the downlink subband, are distributed throughout a bandwidth of an unlicensed spectrum band, or throughout a bandwidth of a one or more subbands of an unlicensed spectrum band.

The invention discloses a depth and color fused true color three-dimensional point cloud acquisition method and system, and the method comprises the steps: setting a plurality of lasers to emit specific spectrum laser, enabling the specific spectrum laser to be reflected by the surface of an object, and filtering the specific spectrum laser through a narrow-band optical filter of a corresponding wave band, thereby enabling a corresponding sensor to only receive a single-spectrum laser line emitted by a corresponding laser emitter. A laser center point position and an intensity response value are extracted through a sub-pixel-level laser line refinement technology; calibrating the unified measurement coordinate system through sensor pose calibration; according to the light transmittance of an optical filter, spectral response characteristics of an image sensor and the like, correcting and compensating the intensity response value, calculating a compensation factor to obtain a color value of a measurement point, fusing a three-dimensional coordinate with corrected color information, outputting true color point cloud data, and presenting depth and color information of an object at the same time. The three-dimensional information and the color information of the object are synchronously obtained, so that the measurement data contain rich spectral characteristics.

The invention discloses a MHz frame frequency high-speed spectral measurement system and method, and mainly solves the technical problems that a traditional spectrometer is low in frame frequency, cannot capture spectral change in a high-speed dynamic process in real time, is limited in application scene and the like. The spectral measurement system comprises a slit, a first collimating mirror, a spectral dispersion element, a spectral signal amplification module, a spectral coupling module, a spectral acquisition module and a data processing module, the slit is used for limiting an incident space of a light beam and changing a divergence angle of the light beam; the first collimating mirror is located on the side, away from the to-be-measured object, of the slit. The spectral dispersion element is located on a reflection light path of the first collimating mirror; the spectral signal amplification module is located on a diffraction light path of the spectral dispersion element; the spectrum coupling module, the spectrum acquisition module and the data processing module are sequentially arranged, the spectrum coupling module is used for focusing the spectrum band captured by the spectrum signal amplification module to form a spectrum image, and the spectrum image is acquired by the spectrum acquisition module and then transmitted to the data processing module.

The invention relates to the technical field of photoelectric materials, in particular to application of a Van der Waals tellurium nano material as a near-infrared IIa light nerve regulation material. The invention provides an application of a Van der Waals Te nanometer material as a near-infrared IIa light nerve regulation material, and a preparation method of the Van der Waals Te nanometer material comprises the following steps: taking selenium telluride as a raw material, carrying out chemical vapor deposition on the surface of a substrate, adjusting the temperature of the substrate to 200-400 DEG C, and carrying out heat preservation for 2-4 hours, so as to obtain the Van der Waals Te nanometer material. The Van der Waals tellurium nanometer material is obtained; the chemical vapor deposition is carried out under the condition of introducing nitrogen. The Van der Waals tellurium nano material has a wide spectrum (from visible light to near-infrared light) for optical nerve regulation, the wave band can reach the near-infrared IIa (1.3-1.4 microns) wave band, and under the irradiation of 1.31 microns of light of the near-infrared IIa, mouse cortical nerve cells can be successfully induced to generate action potential.

Technologies for managing interference between terrestrial network (TN) and non-terrestrial network (NTN) are disclosed. An example method includes determining a location of a user equipment (UE), assessing potential interference between TN and NTN based on the determined UE location and spectrum band coverage information of TN and NTN, acting on the UE's connection to the NTN or a request from the UE for connection to the NTN based on the assessed potential interference, and updating the spectrum band coverage information of TN and NTN.

The invention discloses a water quality inspection system based on a full-spectrum unmanned aerial vehicle, and relates to the technical field of environmental monitoring, the system comprises a spectrum acquisition module for acquiring an original spectrum data set containing related information of pollutant types and concentrations to obtain preliminary spectral feature distribution, a data preprocessing module for preprocessing the initial spectral feature distribution according to the preliminary spectral feature distribution, and a water quality inspection module for inspecting water quality according to the data preprocessing module. The system comprises an original spectrum data set, a feature extraction module for denoising the original spectrum data set to obtain a pure spectrum signal set, and a feature extraction module for extracting specific signal features of pollutants for the pure spectrum signal set and determining a spectrum band range corresponding to each feature to obtain a characterized spectrum signal subset; the water quality inspection system based on the full-spectrum unmanned aerial vehicle realizes real-time monitoring and analysis of water body pollution, can quickly identify the types, concentrations and diffusion conditions of pollutants, provides scientific basis and decision support for water body pollution treatment, and has important environmental protection significance.

The invention discloses a photovoltaic cell panel invisible defect detection device based on multispectral imaging. The photovoltaic cell panel invisible defect detection device comprises a photovoltaic cell panel to be detected; the excitation module is configured to enable the photovoltaic cell panel to be detected to generate a short-wave infrared band under the irradiation of an excitation light source; the excitation light source comprises a near-infrared light-induced excitation light source and / or an electroluminescent driving power supply; the spectrum acquisition module comprises a multispectral imaging system composed of a variable optical filter and an area-array camera, the variable optical filter adopts a wavelength programmable narrow-band filtering assembly, and the transmission wavelength of the variable optical filter covers a 1050-1250 nm characteristic spectrum band; and the image acquisition and processing system is configured to control switching of spectrum channels of the variable optical filter, control the area-array camera to shoot multispectral images in sequence and process the images. The device overcomes the adverse effect of the sunlight environment on photoluminescence imaging or electroluminescence imaging of the photovoltaic cell panel, so that the imaging level of invisible defects of the photovoltaic cell panel is improved.

Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may be configured to receive, from a second UE, a first sidelink control message indicating a first reserved resource to be used by the second UE for sidelink communications in a shared radio frequency spectrum band. The first UE may additionally receive, from a third UE, a second sidelink control message indicating a second reserved resource to be used by the third UE for sidelink communications in the shared radio frequency spectrum band. The first UE may transmit an indication of a conflict between the first and second reserved resources based on the first and second reserved resources overlapping in time and frequency, a signal strength for a signal received from the second UE, the third UE, or both, and a channel access parameter for communications with the second UE, the third UE, or both.

The invention discloses a pixel response inconsistency correction method and system. The method relates to the technical field of pixel response correction and comprises the following steps of pixel dynamic offset calculation, flat field coefficient acquisition, pixel-level comprehensive correction and dead pixel self-repairing secondary optimization. The method comprises the following steps: acquiring a dark frame image and real-time temperature data, and calculating a dynamic offset of a pixel by means of a temperature-time double-domain prediction model; a flat field coefficient is obtained by fusing a basic value calibrated by a laboratory miniature integrating sphere in a full spectrum band and an updated value obtained by in-orbit observation of a deep space and a cloud top and processing of dead pixel detection and the like; then combining a GPS, an attitude angle and a real-time temperature, and using an offset and a flat-field coefficient to carry out pixel-level correction; and finally, a gain compensation matrix is output by means of a deep reinforcement learning model containing a convolutional neural network and a long-short-term memory network, the image is secondarily optimized through a dead pixel self-repairing module, the pixel response inconsistency correction precision is improved, and the problem that in the prior art, the pixel response inconsistency correction error is large is solved.

Radar systems, radar-implementation methods, and non-transitory processor-readable mediums storing processor-executable instructions for implementing radar chirp generation and processing are provided. An example set of processor-executable instructions includes instructions for configuring each of a plurality of transmitters to transmit each chirp of a set of chirps with a specific spin frequency that is different for each transmitter, in which the specific spin frequency is a function of an index value identifying the corresponding transmitter, and a number of the plurality of transmitters; and determining, in a frequency domain, a Doppler representation based on reflected signals that are reflected from one or more objects contacted by one or more chirps of the transmitted sets of chirps, in which the Doppler representation includes multiple spectrum bands including one or more empty spectrum bands determined by the specific spin frequency function, wherein none of the object(s) appear(s) in any of the empty spectrum band(s).

Methods, systems, and devices for wireless communications are described in which wireless nodes may use licensed shared radio frequency spectrum band for communications and one or more neighboring networks may use a same licensed shared radio frequency spectrum band. A second network of the one or more neighboring networks may have priority of use of the licensed shared radio frequency spectrum band within a particular geographic area. Disclosed techniques provide that nodes of each network may indicate an identification of the network, a network priority, or both, in over-the-air signaling. Wireless nodes may determine if another neighboring network is present based on the over-the-air signaling, may determine whether the other network has a higher priority, and may adjust one or more transmissions in the event that a higher priority network is identified, such as through reducing transmission power.

The invention discloses a multi-spectral target recognition method based on double-branch multi-view spatial-spectral feature interaction, which comprises the following steps: performing principal component analysis operation on a multi-spectral image to perform spectral-spectral dimension reduction processing, and extracting a three-dimensional image block as input data by using pixel-level segmentation operation; capturing shallow spectrum-space joint features of the input data; extracting local and global spectrum-space joint features of the input data by using a CNN (Convolutional Neural Network); extracting local and global correlation characteristics between a spectrum band and a space pixel by utilizing Transform; the self-adaptive interaction of local and global spectrum-space joint features captured by CNN and Transform is fused in an early stage, and interdependent attention with more discriminant characteristics is generated; and an output module is utilized to obtain a multi-spectrum target recognition result through mutual dependence on attention.

A communication system is disclosed in which communication between a UE and a base station occurs in uplink only, downlink only, or full duplex, slots or symbols (i.e. SubBand Full Duplex, SBFD). Frequency resources are configured for communication in full duplex slots that include frequency resources for an uplink subband and / or frequency resources for a downlink subband. The frequency resources for the uplink subband, or the downlink subband, are distributed throughout a bandwidth of an unlicensed spectrum band, or throughout a bandwidth of subbands of an unlicensed spectrum band. Further disclosed is communication between a UE and a base station within an unlicensed bandwidth in a time resource configured for both uplink and downlink communication, dependent upon certain conditions being fulfilled. For instance, the frequency resources occupy no mora than a predefined proportion of the unlicensed bandwidth, no other node is present, distance between UE and base station is below a threshold. Further disclosed is communication between a UE and a base station using an unlicensed bandwidth in s time resources using a first or second configuration dependent upon whether the time resource is configured for uplink or downlink communication only, or for both uplink and downlink communication.

An ultra-wide angle broadband polarization imaging system based on a metasurface, and a detection apparatus, the imaging system comprising a first lens (L1) having negative optical power, a linear polarizer (P1), a quarter wave plate (P2), a diaphragm (STO), a second lens (L2) having positive optical power, a third lens (L3) having positive optical power, and the metasurface (M), wherein an object side surface and an image side surface of the lens are planar or spherical; and the phase distribution required for the system in a broadband spectrum band is achieved by setting different rotation angles θ of a unit structure of the metasurface.

The invention discloses a multispectral microscope blood cell automatic classification and counting system. The system is composed of a multispectral illumination and microscopic imaging module, a spectrum and geometric calibration module, a multispectral preprocessing and cell segmentation module, a multispectral discrimination index and spectral band weight adaptive updating module, a cell graph structure classification module, a man-machine interaction module, an online adaptive learning module and the like. The method comprises the following steps: acquiring a blood smear image by a system under a narrow-band multi-spectrum condition, constructing cellular spectrum-morphological characteristics by combining a multi-scale segmentation result after noise suppression, flat field correction and background deduction, generating a discrimination index with a self-adaptive spectrum band weight, and completing joint classification and counting on a cell map; and meanwhile, carrying out constrained increment updating on the spectral band weight and the classification model by utilizing an artificial correction result of the low-confidence-coefficient cells. Compared with a traditional single-channel microscopic imaging and static classification method, the method has higher classification accuracy and counting stability under different dyeing and imaging conditions, and the workload of manual recheck can be reduced.

The invention discloses a WiFi (Wireless Fidelity) 7 spectrum sharing method, device, equipment and medium, relates to the technical field of wireless communication, and is used for solving the problem of unreasonable spectrum resource scheduling. The method comprises the following steps: generating a candidate bandwidth perforation mode set according to a channel occupancy rate matrix; wherein the candidate bandwidth perforation mode supports asymmetric multi-layer nested segmentation of the spectral bandwidth; inputting the candidate bandwidth perforation mode set and channel state information (CSI) into the trained mixed AI model to obtain an optimal perforation mode; wherein the trained mixed AI model is composed of hierarchical reinforcement learning HRL, a time convolution network TCN and a graph neural network GNN; and according to the optimal perforation mode, WiFi 7 spectrum sharing is carried out, so that the spectrum sharing capability of WiFi 7 can be remarkably improved.

The invention belongs to the technical field of meteorological observation, and particularly relates to a sounding balloon detection method based on a remote sensing image, which comprises the following specific steps: searching to obtain a to-be-analyzed image list IC according to a specified search area, retrieving satellite image data products in a specified space-time range, and obtaining a to-be-analyzed image list IC according to the to-be-analyzed image list IC; an original image is recorded by adopting a 16-bit unsigned integer (uint16), according to the method described by the invention, the color characteristics of the target in each wave band are highlighted through wave band calculation, and further screening is carried out by utilizing a spatial relationship, so that the detection of the high-speed flight target is realized, the algorithm process is simple, and the calculation complexity is low; according to the method, only R / G / B three-band data is needed, and the R / G / B spectrum band is commonly possessed by an optical satellite, so that the algorithm can be applied to other optical satellite image data by adjusting parameters, and the applicability is high.

The invention provides a frequency interleaving system and electronic equipment, and the system comprises a sampling circuit which carries out the sampling of an input signal based on N sampling modules; the input signal is a continuous time analog signal, and the output signal of the sampling circuit is a discrete time analog signal; the frequency interleaver is used for decomposing the broadband signal output by the sampling circuit into N narrowband signals, and the spectral bandwidth of each narrowband signal is one sub-band of the spectral bandwidth of the input signal; the signal processing circuit is used for performing signal reconstruction on the output signal of the frequency interleaver based on a signal reconstruction unit; n is a natural number greater than or equal to 2. According to the frequency interleaving system and the electronic equipment, under the condition that the frequency of the high-frequency input signal is not mixed to the intermediate frequency or the baseband, the high-frequency analog input signal is directly sampled, and the robustness of errors between channels is realized by combining the frequency interleaver; the system overhead is small, the system implementation is simple, and frequency response mismatch is not introduced.

The application provides a receiving end filter and a preparation method thereof, and a combined filter, and belongs to the field of coating technology. The application solves the problem that the existing receiving end filter is relatively single. The receiving end filter comprises a glass substrate, a narrow-band pass film system and an anti-reflection film system. The narrow-band pass film system comprises silicon oxide film layers and hydrogenated silicon / hydroxylated silicon / nitrogen hydrogenated silicon film layers which are alternately deposited layer by layer, and a silicon oxide film layer as an outermost layer. The anti-reflection film system comprises silicon oxide film layers and hydrogenated silicon / hydroxylated silicon / nitrogen hydrogenated silicon film layers which are alternately deposited layer by layer, and a silicon oxide film layer as an outermost layer. The receiving end filter has the advantages that the overlapping high transmittance is achieved within an angle range of 0°-60° of an incident angle, and the demand cut-off spectrum band has the effect of inhibiting the transmission of light signals within the angle range of 0°-60° of the incident angle.

Methods, systems, and devices for wireless communications are described. A wireless communication device may receive, via a first radio frequency spectrum band, a control message that includes an uplink grant for sending one or more backscattered uplink messages via a second radio frequency spectrum band that is higher than in frequency than the first radio frequency spectrum band and separated from the first radio frequency spectrum band by at least a threshold frequency gap. The wireless communication device may then receive a continuous waveform via the second radio frequency spectrum band, and modulate the continuous waveform with uplink data of the one or more backscattered uplink messages. The wireless device may then send, via the second radio frequency spectrum band, a backscattered signal of the continuous waveform based on modulating the continuous waveform with the uplink data.

The invention provides a spectral bandwidth adaptive adjustment method and device, equipment, a medium and a program product. The method comprises the following steps: acquiring a topological relation among a plurality of components in a satellite broadband communication system and a data index set of each component; constructing an adjacent matrix based on the topological relation; constructing a running state matrix based on the plurality of data index sets; inputting an adjacent matrix and the operation state matrix into an optimal Actor network to obtain a spectral bandwidth adjustment action; and issuing the spectral bandwidth adjustment action to the satellite broadband communication system to enable the satellite broadband communication system to execute the spectral bandwidth adjustment action. According to the spectral bandwidth adaptive adjustment method provided by the invention, the optimal Actor network is trained and deployed through the reinforcement learning algorithm, and the optimal Actor network can output an accurate spectral bandwidth adjustment action according to the adjacent matrix and the operation state matrix, so that the satellite spectral bandwidth is dynamically adjusted according to the real-time communication condition, and the flexibility of spectral bandwidth adjustment is improved; and the spectrum utilization rate is maximized.

The utility model relates to the technical field of light guide plates, and particularly discloses an optical plate capable of selectively transmitting specific spectrums, which comprises a light guide plate body, a selective transmission layer is coated on the surface of one side of the light guide plate body, a selective reflection layer is coated on the surface of the other side of the light guide plate body, and the selective transmission layer is a selective antireflection film. The selective reflecting layer is a selective reflecting film; according to the optical plate, the selective transmission layer is plated on one surface of the light guide plate body, and the selective reflection layer is plated on the surface of the other side of the light guide plate body, so that after light containing multiple sections of spectrums enters the light guide plate body, the spectrums of specified wave bands can be selectively filtered, and the expected spectrum wave bands are emitted to the maximum extent; therefore, the selectivity of the spectrum is formed.

The invention provides a low-light multispectral imaging device under low illumination at night, which is used for solving the problem that spectral characteristic information of a target cannot be acquired by adopting a low-light detection system in a low-illumination environment at night at present. And a visible near-infrared spectrum imager cannot be used for imaging or cannot be used for acquiring a high-contrast image for target detection and identification. According to the low-light-level multispectral imaging device, the electric filter wheel is arranged between the low-light-level imaging lens and the low-light-level detector, hardware external synchronization is arranged between the electric filter wheel and the low-light-level detector, switching of one narrow-band optical filter is completed every time the rotating structure rotates once, switching of one spectral band channel is achieved, and switching of the low-light-level imaging lens and the low-light-level detector is achieved. At the moment, through hardware external synchronization between the electric filter wheel and the low-light detector, the low-light detector synchronously exposes once; according to the invention, through coupling of a low-light imaging technology and a light splitting technology of a plurality of narrow-band optical filters, information of a plurality of spectrum band channels of a detected target is obtained, and efficient detection under low illumination at night is realized.

A Fourier transform infrared spectrum measurement system and method, the system comprises a sampling device, a field programmable gate array (FPGA) and a host computer; the host computer is used for receiving a sampling rate parameter input by a user and sending the sampling rate parameter to the FPGA; the FPGA is used for calculating a clock frequency according to the sampling rate parameter, setting the clock frequency and generating a clock signal to send to the sampling device; the sampling device is used for collecting interferogram data according to the clock signal and sending the interferogram data to the FPGA after processing; the FPGA is further used for forwarding the interferogram data to the host computer; and the host computer is further used for completing spectrum measurement according to the interferogram data. Through the scheme, a spectrum measurement system with adjustable sampling rate, spectrum band and resolution is realized, the processing speed is fast, the control of the sampling rate is more accurate, and the system is easy to integrate and has lower cost.