36 results about "Scattering function" patented technology

The invention discloses a high-frequency shallow water bottom reverberation signal modeling method, and belongs to the technical field of underwater acoustic engineering and signal processing. The method comprises the following steps: setting a modeling hypothesis; a cylindrical array geometric structure is constructed, scattering units are divided, and channel parameters and scattering functions are obtained in combination with a Bellhop tool and a GABIM model; generating a reverberation signal time domain expression, deducing an array receiving signal spatial domain expression and calculating a spatial spectrum; the model can also adjust underwater environment parameters to realize simulation under different conditions, and performs time domain and space domain theoretical analysis on reverberation signals based on a cylindrical array. Multi-dimensional underwater environment parameters are fused, and the modeling precision is improved; a receiving and transmitting combined cylindrical array is adapted, and spatial gain is embodied; experiments prove that the average error is within 3dB, the practicability is outstanding, support can be provided for design and optimization of the sonar system, and the method is suitable for underwater reverberation signal simulation and characteristic analysis of the sonar system in the high-frequency shallow water environment.

Embodiments of the present disclosure relate to using ray tracing to simulate physical environments based on scene geometry and electromagnetic material (EM) properties (scene properties) which may be assigned to objects in the scene. The scene properties may include relative permittivity, conductivity, and permeability of the objects, as well as effective roughness, and scattering functions. Segmentation data may be used to assign materials to objects, providing additional information for calibrating a ray tracer learning the scene properties for an environment via radio propagation. The segmentation data may comprise a segmentation mask with object class identifiers associated with each pixel of an image of the scene. For example, each pixel included within a chair is associated with an object class identifier that is specific to a chair. The segmentation data enables clustering of objects in image space where the objects in each cluster share radio materials and therefore share scene properties.

The invention is applicable to the field of oil and gas geophysical exploration, and provides a shale solid skeleton and organic matter elastic parameter synchronous prediction method, which comprises the following steps of: constructing a rock physical model for representing a shale reservoir solid skeleton elastic modulus and an organic matter elastic modulus; developing an in-well inversion method based on the rock physical model; combining a rock physical model and a scattering function theory, and establishing a reflection coefficient formula represented by shale solid skeleton elasticity modulus, organic matter elasticity modulus and density parameter linearization; a reflection coefficient formula and a Bayesian linear inversion theory are combined to develop an earthquake rock physical inversion method; applying synthetic seismic data, and testing and verifying the effectiveness of the seismic rock physical inversion method constructed in the step E; and then the method is applied to actual seismic data to predict the elasticity modulus of a shale gas reservoir solid skeleton and organic matters in a research area, and an effective method is provided for brittleness evaluation of a shale gas reservoir engineering dessert and organic matter enrichment prediction of a geological dessert.

The present application is suitable for oil and gas geophysical exploration field, and provides a shale solid skeleton and organic matter elastic parameter synchronous prediction method, the method comprises the following steps: constructing a petrophysical model representing the elastic modulus of shale reservoir solid skeleton and the elastic modulus of organic matter; developing an inversion method in the well based on the petrophysical model; combining the petrophysical model and the scattering function theory, establishing a reflection coefficient formula linearly characterized by the elastic modulus of shale solid skeleton, the elastic modulus of organic matter and the density parameter; combining the reflection coefficient formula and the Bayesian linear inversion theory, developing a seismic petrophysical inversion method; applying synthetic seismic data, testing and verifying the effectiveness of the seismic petrophysical inversion method constructed in step E; then applied to actual seismic data, predicting the elastic modulus of shale gas reservoir solid skeleton and organic matter in the study area, providing an effective method for the brittleness evaluation of shale gas reservoir engineering sweet spot and the organic matter enrichment prediction of geological sweet spot.

The invention belongs to the technical field of signal processing, and discloses a distance-Doppler domain high-resolution parameter estimation method based on FrFT. Firstly, a target echo multi-bright-spot signal model is constructed, and then a corresponding replica signal set is constructed in combination with a transmitting signal and a to-be-detected target speed range; then selecting an optimal order, and performing fractional order Fourier transform on the received echo signal, the transmitted signal and the replica signal; constructing a distance Doppler fuzzy matrix according to a fractional order domain convolution theorem; an unconvolution integral model is established, and a Richardson-Lucy deconvolution iteration formula is deduced; and finally, solving a high-resolution target scattering function by using an R-L algorithm, and extracting target parameters for estimation. According to the method, the distance, speed resolution and parameter estimation performance of a traditional algorithm on the extended target can be improved, and robustness is achieved.

The present invention relates to a polyamide resin in which an average particle size of individual crystals measured by a small-angle X-ray scattering apparatus is 8.0 nm or less, and a UV-cut slope (dT / dλ) measured for a specimen having a thickness of 45 μm or more and 55 μm or less according to ASTM E424 is 0.25 or more in the range of 10% to 80% transmittance, and a polymer film and resin laminate using the same. In addition, the present invention relates to a polyamide resin with characteristic profile in which a small-angle X-ray scattering function obtained by irradiating the polyamide resin with X-rays having an energy of 10 KeV to 20 KeV using a small-angle X-ray scattering apparatus satisfies Equation 1 and Equation 2, and a polymer film and resin laminate using the same.

The utility model provides a myopia prevention and control lens, which relates to the technical field of optical lenses, and comprises a lens body, a first optical area and a second optical area, the second optical area is composed of a plurality of ring mirrors with diopters; the first optical area and the second optical area are arranged on the lens body; according to the utility model, the first optical area composed of a plurality of optical devices with a scattering function and the second optical area composed of a plurality of ring mirrors with diopter are arranged, so that multiple optical signal stimulation is provided for the eyes of a myopic patient, and the myopic eye mask is suitable for myopic crowds insensitive to single optical signals, and meanwhile, the myopic eye mask is suitable for myopic people. Due to the fact that the out-of-focus ring mirror can provide continuous out-of-focus signal stimulation, visual fatigue of a wearer can be relieved, and the myopia prevention and control effect is improved.

The present invention relates to the field of electronic materials, specifically to an aircraft de-icing / electromagnetic low-scattering compatible structure and a design method thereof. The present invention adopts a periodic high-wave-transmittance electric heating impedance network, conforms the impedance network to the wave-absorbing structure, and realizes high-wave-transmittance performance through patterned design of the impedance network; and by optimizing the key ice formation areas on the surface of the wave-absorbing structure to perform resistance control in partitioned areas, the purpose of zoned heating and concentrated heat adjustment is achieved, thereby achieving more targeted de-icing. The present invention can simultaneously realize the functions of electric heating de-icing and electromagnetic low-scattering, which can not only meet the needs of aircraft de-icing at high altitude or in cold environments, thereby protecting the flight safety of the aircraft, but also ensure that the aircraft's electromagnetic low-scattering function is not affected. It is expected to be applied to the safety protection and electromagnetic compatibility of future low-detectable aircraft, and become its important technical accumulation.

The invention relates to the technical field of diffractive optical elements, and discloses a four-point square diffractive optical element with a bottom stray light scattering function, the four-point square diffractive optical element comprises a laser head body and a four-point square diffractive optical element body, the surface of the laser head body is provided with a control panel, and the surface of the laser head body is in threaded connection with a head cover; the four-point square diffraction optical element body is arranged in the head cover, and by arranging the auxiliary device, when the four-point square diffraction optical element body is installed, after the head cover and the laser head body are installed, the pressing assembly can press the outer ring base, positioning is achieved, and damage to the optical element is reduced; the outer ring base is matched with the inner heat conduction ring to separate the four-point square diffractive optical element body from the head cover, meanwhile, the inner heat conduction ring can conduct heat on the four-point square diffractive optical element body, the head cover through hole, the protruding block penetrating hole and the flowing space form a through airflow path, external air can directly make contact with the inner heat conduction ring and take away heat, and effective heat dissipation is achieved.

The invention discloses a differential dynamic microscopic image processing method based on a root-mean-square error. The differential dynamic microscopic image processing method comprises the following steps: a sequence image acquisition step: acquiring a time sequence microscopic image; a sequence image processing step: obtaining a difference image data set; performing one-dimensional Fourier transform in two directions on the differential image data set in sequence to obtain two-dimensional transform result data, and calculating to obtain Fourier amplitude spectrum image data; an obtained data processing step: carrying out dimension reduction processing on the Fourier amplitude spectrum image data; introducing structure function fitting, calculating a root-mean-square error between a fitting curve of the data after dimension reduction processing and the Fourier amplitude spectrum image data, and selecting a data truncation point according to the root-mean-square error; and an intermediate scattering function is introduced, and dynamic information of Brown particles is obtained based on the relationship between the data after selection of the truncation point and the diffusion coefficient. According to the method, the data truncation point is determined through the root-mean-square error, so that the processing time is remarkably shortened while the measurement precision is ensured.

The embodiment of the invention provides a short-wave frequency shift modulation and probing integrated transmission method, device and equipment and a medium. The method comprises the following steps: preprocessing a transmitted signal to obtain a modulated signal; transmitting the modulation signal through a channel to obtain a receiving signal; performing frequency offset correction on the received signal, and performing symbol-by-symbol weighted soft information fusion processing on the received signal after frequency offset correction to obtain a fused signal; decoding the fused signal to obtain a decoded bit data sequence, and completing data transmission; performing coding, interleaving, mapping and frequency shift modulation on the decoded bit data sequence to obtain a copy sequence of the transmitted signal; determining a channel impulse response according to the transmitted signal and the replica sequence of the transmitted signal, and determining a channel scattering function based on the channel impulse response; the channel features are extracted based on the channel scattering function, channel detection is completed, fusion of communication and detection functions is achieved, and the data transmission capacity of a communication system and the reliability of signal transmission are improved.

The application discloses an imaging domain least square migration method and device, electronic equipment and medium. The method can comprise: acquiring a global space-varying scattering function, interpolating and reconstructing the global space-varying scattering function to generate a plurality of scattering function data volumes; calculating the spatial deconvolution of the plurality of scattering function data volumes according to a depth domain imaging volume through an MPI parallel strategy to obtain corresponding least square migration images; and reducing the least square migration images corresponding to the plurality of scattering function data volumes to obtain a final imaging result. The application encrypts the point spread function through the interpolation and reconstruction strategy, and further deconvolves the reconstruction to suppress discontinuous noise through multiple superimpositions to obtain higher imaging accuracy.

The application relates to a chemical short-range order measurement method and system based on an atomic pair distribution function, and the method comprises the following steps: performing a total scattering experiment on a polycrystalline powder sample to obtain total scattering data, a scattering function and an atomic pair distribution function; based on the total scattering data, an initial three-dimensional atomic structure model is constructed; further, the initial three-dimensional atomic structure model is fitted and reconstructed by taking minimization of a fitting goodness factor as a target, so that a three-dimensional atomic structure model after fitting and reconstruction is obtained; according to the three-dimensional atomic structure model after fitting and reconstruction, a radial distribution function and a bulk average distribution concentration are calculated, and a chemical short-range order parameter calculation cutoff is set according to a near-neighbor atomic cutoff distance; further, the probability of an atom finding other types of atoms under the calculation cutoff is calculated; and the chemical short-range order parameter is calculated based on the probability and the bulk average distribution concentration. Compared with the prior art, the application has the advantage of wide application scenarios.

The present application relates to a kind of multi-dimension gradual scattering light guide plate, processing method and backlight plate, and the light guide plate includes substrate layer and scattering function layer.Substrate layer and scattering function layer are closely adhered, and substrate layer and scattering function layer are respectively made of different light-transmitting material composite;Scattering structure is gradually distributed along at least two dimensions on the light guide plate, scattering structure penetrates substrate layer and scattering function layer, scattering structure is misaligned arrangement in adjacent column in plane, and misalignment amount is 1 / 2-2 / 3 of column spacing;Light guide plate includes light inlet end and light outlet end, in the direction of light outlet end towards light inlet end, the distribution density of scattering structure gradually increases, in the direction of substrate layer towards scattering function layer, the size of scattering structure gradually decreases.Scattering structure gradually increases along light inlet end to light outlet end density, gradually decreases along substrate layer to scattering function layer size, and misaligned arrangement in adjacent column spacing in plane, it is favorable to eliminate bright and dark stripe, let light emitting surface brightness distribution be more uniform.

This invention relates to the field of shortwave antenna communication channel testing and modeling technology, specifically to a method for measuring the angular power spectrum of an antenna in a shortwave skywave scenario. The method includes: the receiver performing a two-dimensional equally spaced angular scan within a preset azimuth and elevation range; establishing an angular power spectrum measurement equation based on the received signal power, antenna pattern, and noise power channel, using the scattering function; convolving this equation with the pattern to obtain the angular power spectrum within a single path; discretizing the single-path received power matrix and antenna pattern matrix in two dimensions, and then performing zero-plugging expansion on each; converting the discretized single-path received power matrix and antenna pattern matrix into two-dimensional frequency domain matrices, and determining the frequency domain ratio between the received power matrix and the antenna pattern matrix mapped to the angular domain using time-delay Doppler domain parameters. This invention improves the accuracy of angular power spectrum measurement in shortwave skywave channels while reducing the dependence of traditional empirical modeling methods on a single propagation assumption.

The application discloses a hyperspectral backscattering function and scattering coefficient measuring device, and belongs to the technical field of backscattering function measuring devices. The device comprises a light source. The light emitted by the light source is divided into two beams of collimated light through a one-to-two optical fiber jumper wire. One beam of collimated light is introduced into a reference light flux detector through a first optical fiber. The other beam of collimated light enters a first optical window through a second optical fiber and irradiates a scattering body in a sample cell. The scattered light generated after scattering by the scattering body is introduced through a second optical window and transmitted to a scattering flux detector through a third optical fiber. The scattering flux detector is used for receiving the scattered light from the scattering body and performing spectral spectroscopy and array detection on the scattered light. The reference light flux detector is used for receiving the light flux from the light source introduced through the first optical fiber and performing spectral spectroscopy and array detection on the light flux. The application solves the problem that the existing water backscattering function and scattering coefficient measuring device can only detect the backscattering coefficient of water at several wavelengths.

The invention relates to a volume scattering function measurement technology based on white light interference. A broadband spectrum light source, a color filter, an optical beam splitter, a measurement light path, a length-adjustable reference light path, a measured medium, a polarization beam splitter, an optical beam combiner, a polarization light switch, a photoelectric detector, a signal acquisition and processing unit, a control unit, a reference arm length adjusting unit and a light switch control unit are included. According to the definition of a volume scattering function, a single sensor can be adopted to measure volume scattering intensities at different angles in sequence along a circular trajectory; a plurality of sensors can also be adopted and arranged along a circular trajectory to measure volume scattering intensities at different angles. The measurement of the volume scattering function follows the white light interference technology, and the influence of background light and stray light is overcome. The polarized light switch is controlled to selectively output the horizontal polarization coherent light or the vertical polarization coherent light, and the horizontal polarization or vertical polarization body scattering function of the measured medium can be obtained. A narrow-band spectrum volume scattering function corresponding to a narrow-band band-stop optical filter can be obtained by measuring the volume scattering function of the wide-spectrum light source and combining the narrow-band band-stop optical filter.

The present invention discloses a MIMO radar near-field precision imaging measurement and calibration method under a time-varying interference environment. First, the measured target and the calibration body are subjected to simultaneous remote MIMO near-field imaging measurement. The subspace spectrum estimation method is used to obtain the two-dimensional position parameters of the calibration body in the preprocessed two-dimensional image. The scattered echo data of the calibration body is extracted based on the parameterized model characterization method. The channel-by-channel broadband scattering function theoretical value of the calibration body is established according to the scattering characteristics of the calibration body itself and the position relationship of the MIMO radar array element. Finally, the imaging calibration of the measured target is achieved by solving the MIMO array imaging calibration coefficient channel by channel and frequency point by frequency point. The present invention adopts the above-mentioned MIMO radar near-field precision imaging measurement and calibration method under a time-varying interference environment. In the near-field diagnostic imaging measurement of the target using the MIMO radar, the influence of the time-varying interference factors in the measurement environment on the imaging measurement results can be eliminated to a certain extent, thereby improving the accuracy of the MIMO radar near-field imaging measurement.

The invention discloses a transmission, reflection and scattering integrated three-frequency-band common-aperture array antenna. The array antenna comprises a transmission unit, a reflection unit and a scattering unit. The transmission unit adopts a receiving-transmitting structure, the receiving structure is composed of a single-layer plane Vivaldi structure and a multi-stage fan-shaped microstrip line, the transmitting structure is composed of a single-layer plane eight-wood structure and a differential microstrip line, and 2-bit phase regulation and control are realized by simultaneously regulating and controlling the direction of the multi-stage fan-shaped microstrip line and the line length of the differential microstrip line. The reflection unit adopts a quasi-I-shaped metal step, and 1-bit phase regulation is realized by rotating the quasi-I-shaped metal step by 90 degrees. Scattering units are obtained by double-split square rings according to periodicity, and 1-bit phase regulation and control are achieved through mirroring operation. The reflecting unit and the scattering unit are consistent in size, are integrated in the same area, and are arranged on the front surface of the common metal ground on the two sides of the receiving structure of the transmission unit, so that the integration of transmission, reflection and scattering functions of three frequency bands is realized under a common port surface.

The invention is suitable for the technical field of oil and gas geophysical exploration, and provides a shale geology and engineering double-dessert synchronous prediction method and system, and the method comprises the following steps: constructing a rock physical model which represents a shale skeleton brittleness index, a solid skeleton volume modulus and an organic matter elastic modulus; on the basis of the rock physical model, developing an in-well rock physical inversion method, and predicting a skeleton brittleness index, a solid skeleton volume modulus and an organic matter elastic modulus by using logging data; establishing a reflection coefficient formula by combining a rock physical model based on a scattering function theory; based on a Bayesian inversion framework and a multi-data assimilation set inversion method, in combination with a reflection coefficient formula, a pre-stack seismic inversion method is developed, and the above parameters are synchronously predicted by using pre-stack seismic data. According to the method, a new effective method can be provided for simultaneous prediction of organic matter enrichment characterization of geological sweet spots of shale gas reservoirs and brittleness evaluation of engineering sweet spots.

The application provides a particle backscattering coefficient acquisition method and device, a storage medium and a terminal, wherein the method comprises the following steps: acquiring wide-angle VSF data of a target sea area, and acquiring corresponding backscattering full-angle volume scattering function data of the wide-angle VSF data by using an interpolation algorithm; acquiring corresponding backscattering distribution curves based on the backscattering full-angle volume scattering function data; extracting a plurality of corresponding angle values from a first interval, a second interval, a third interval and a fourth interval at a preset interval respectively, and arranging and combining all the angle values to acquire a plurality of different preset angle combinations; performing polynomial fitting based on each preset angle combination to acquire an estimated backscattering coefficient fitting model corresponding to the backscattering distribution curves; and inputting the backscattering full-angle volume scattering function data into the estimated backscattering coefficient fitting model for calculation to acquire a particle backscattering coefficient result. The application can improve the accuracy of acquiring the particle backscattering coefficient.

The invention discloses a sensor for measuring scattered light of a water body, a sensing device, a system for measuring optical parameters of the water body and a method for measuring a scattering function of the water body, the sensor is used for sensing the light intensity of light entering the water body along a first straight line at each scattering angle, and the sensor is characterized by comprising a plurality of sections of optical fibers, each section of optical fiber receives an optical signal by using the exposed side surface of the core layer, and each section of optical fiber is located in the same plane perpendicular to the first straight line and is arranged corresponding to the same scattering angle; the sections of optical fibers are arranged at intervals along the first straight line direction and have the same sector angle relative to the first straight line; the sensing device comprises a sensor and a seat body; the system for measuring the optical parameters of the water body comprises a transparent container, a laser transmitting module, a signal processing module and the sensing device, according to the measurement method for the water body scattering function, the system for measuring the optical parameters of the water body is adopted to obtain the water body scattering function, scattered light in a large sector angle range in the same scattering angle can be well received, the obtained numerical value can better represent the optical characteristics of the water body, the measurement precision is high, the cost is low, and the benefit is high.

The embodiment of the utility model provides a metering detection device with an anti-tilting function, which relates to the technical field of metering detection equipment and comprises a metering box, a positioning unit is arranged at the lower end in the metering box and comprises a fixed disc fixedly mounted at the bottom of the metering box and positioning feet arranged at the upper end of the fixed disc, and the positioning feet are arranged on the fixed disc. The positioning feet are movably installed at the upper end of the fixing disc, the adjusting screw rod is installed at the upper end of the fixing disc and penetrates through the positioning feet, and when liquid needs to be added into the metering cup, the driving motor can drive the second bevel gear installed at the lower end to rotate, and then the first bevel gear installed on one side in a meshed mode is driven to rotate; and then the adjusting screw rod fixedly installed on one side rotates to drive the positioning feet installed at the upper end in a threaded mode to synchronously stretch or contract, then centering clamping can be conducted on the metering cup movably installed in the middle, quantitative materials can be conveniently injected into a feeding device at the upper end, and the metering cup is prevented from being placed in an offset mode.

The invention belongs to the field of short-wave channel measurement, and particularly relates to a short-wave channel measurement clustering calculation method based on a scattering function, which comprises the following steps of: designing an LFM measurement signal frame structure aiming at time delay / Doppler resolution and a maximum measurement range; designing that a received signal is related to a local replica signal, and solving a channel scattering function by using fast Fourier transform; designing a composite calculation and clustering calculation measurement parameter definition, and calculating a single channel measurement result according to a channel scattering function; and screening single channel measurement results of the same link, time and frequency, and calculating statistical results of a mean value, a standard deviation and a median. According to the method, the LFM signal is taken as a measurement signal, the method has the characteristics of low peak-to-average ratio, high resolution and strong anti-interference capability, and meanwhile, LFM frame structures with different time frequency resolutions and maximum measurable ranges can be designed through theoretical analysis.

The application discloses a kind of based on super surface's radiation scattering integrated antenna structure, including the basic structure unit of two layers of dielectric layer and three layers of metal layer, dielectric layer is by first dielectric layer and second dielectric layer from top to bottom distribution;Metal layer is from top to bottom respectively the super surface scattering and radiation layer of first metal layer, the copper column layer and direct current bias layer of second metal layer, the metal ground layer of third metal layer;The super surface scattering and radiation layer has scattering function and radiation function, copper column layer and direct current bias layer provide voltage difference and excitation for super surface;Metal ground layer is as the floor layer of entire antenna;Super surface is by n×n basic structure unit copy translation composition.The application can let RCS under the irradiation of different incident waves realize the effect of reduction.The radiation and scattering characteristics of the proposed digital metasurface array are independent of each other and can be flexibly controlled respectively.

The invention discloses an optical synergistic adhesive film as well as a preparation method and application thereof. The optical synergistic adhesive film comprises a first light scattering function layer, a light storage function layer and a second light scattering function layer, the two faces of the light storage function layer make contact with the first light scattering function layer and the second light scattering function layer respectively, the first light scattering function layer comprises first matrix resin and first light scattering particles, and the second light scattering function layer comprises second matrix resin and second light scattering particles. The second light scattering functional layer comprises second matrix resin and second light scattering particles, and the light storage functional layer comprises third matrix resin and a long afterglow luminescent material. The light-emitting duration of the optical synergistic adhesive film and the power increment and the actual power generation increment of the photovoltaic module are effectively improved.

The invention discloses a method and device for measuring a complex scattering function of a radar target, and relates to the field of microwave stealth technology and active microwave remote sensing, and the method comprises the steps: constructing a generalized radar equation represented by a complex voltage for a radar detection target; according to the generalized radar equation, fitting to obtain a relation curve of the amplitude and the distance of the complex scattering function and a relation curve of the phase and the distance; performing low-pass filtering processing on the relation curve of the amplitude and the distance and the relation curve of the phase and the distance; and for the relation curve of the amplitude and the distance after filtering and the relation curve of the phase and the distance after filtering, obtaining the amplitude and the phase of the complex scattering function at the infinite far field by adopting a polynomial fitting and limit taking method. According to the invention, the method can directly and accurately measure the complex scattering function of any small to-be-measured target (including a standard device), and does not need an RCS standard device with a known standard value in the measurement process.

The utility model discloses a multispectral water body attenuation and forward small-angle scattering measurement device, which is characterized by comprising a light source, a scatterer and a water body attenuation and forward scattering luminous flux detection module, wherein the light source comprises N collimation lasers and a laser output gating module; each collimating laser is transmitted or reflected by the laser output gating module after being subjected to electric control time-sharing gating, and then outputs a single-wavelength collimating working light source in a time-sharing manner; the single-wavelength collimation working light source is scattered by the scatterer to form scattered light in different directions; the water body attenuation and forward scattering luminous flux detection module comprises a scattered light receiving and converging hyperbolic convex lens, an optical filter and an area array CCD (Charge Coupled Device); scattered light is collimated and converged to a radial optical filter through a scattered light receiving and converging hyperbolic convex lens, and scattered light signals are attenuated by the optical filter according to the attenuation amount of the radial optical filter in proportion and then are incident to a photosensitive element of the area array CCD. According to the utility model, measurement of multi-wavelength multi-angle forward small-angle volume scattering functions is realized.

This invention relates to shortwave communication technology, and particularly to a shortwave MIMO channel modeling method based on multi-domain coordination of time-space-frequency-polarization-angle. The method includes: constructing a nonlinear array of transceiver antennas; determining the geometric relationships of element spacing, element velocity, distance from the reflector cluster to the antenna, and reflector cluster velocity based on three-dimensional vectors; establishing a path transmission delay characterization mechanism jointly determined by propagation distance, the number of inseparable multipath paths, and time-difference statistical characteristics; decomposing the distance from the element to the reflector cluster into time-space stationary and non-stationary terms; establishing a polarization matrix and performing amplitude-phase weighting on multipath components with different arrival and departure angles; obtaining the existence and disappearance states of the path over time based on the reflector cluster probability model combined with Markov processes; incorporating the influence of antenna polarization on channel amplitude into the channel expression; and generating impulse response and corresponding scattering functions using the obtained angular power spectrum, delay domain model, and time-varying path state model. This invention improves the polarization adaptability of large-scale arrays to actual arrays.