66 results about "Array processing" patented technology

The invention, which relates to the technical field of radar anti-interference algorithm optimization, discloses a radar anti-interference algorithm optimization platform comprising an environment sensing module, an interference classification module, a dynamic filtering module, a waveform optimization module, an array processing module and an efficiency feedback module. The environment sensing module is used for carrying out multi-dimensional sampling on radar receiving signals by adopting a broadband digital channelization technology to obtain original electromagnetic environment data; the interference classification module is used for analyzing the original electromagnetic environment data by adopting a deep convolutional neural network to obtain a feature parameter set; the dynamic filtering module is used for carrying out adaptive processing on the characteristic parameter set by adopting an improved RLS-NLMS hybrid algorithm to obtain a baseband signal; the waveform optimization module is used for carrying out waveform parameter inversion on the baseband signal by adopting a genetic algorithm to obtain a waveform code; and the array processing module is used for performing spatial domain synthesis on the waveform codes by adopting a distributed MVDR algorithm to obtain an anti-interference beam forming weight.

Methods and systems are described herein for adaptive beamforming and interference mitigation using a time synchronized scalable cohered on-array processing system (“system”). The system may be a phased array implementing a software-defined radio using multi-input-multi-output antenna elements. The system includes multiple subarray elements which are configured into a tiered array of scalable subarrays that performs intermediary collation, coherence, noise reduction, and adaptive beamforming operations through processor nodes disposed between tiers. The intermediary collation operations process discrete portions of node excitation data to enable the phased array to generate an adaptive beam profile that directs high-directionality beams toward desired targets while adaptively partitioning interference sources between subarray elements. Further, the system makes use of a scalable multidimensional array to provide telecommunication and electromagnetic wave manipulation operations for applications of varying scale.

A novel frequency tunable bi-directional phased array processing consisting of variable phase shifting and amplitude adjustment which employs a vector modulator and active combiner and splitter is proposed. Advantages of the proposed bi-directional a phased array processing includes the following 1) compact size; 2) high efficiency; 3) reduced passive trace loss and power consumption; 4) active current combining; 5) high input-output isolation; 6) high resolution and precise gain control and unequal combining or splitting; 7) phase-invariant amplifier design; 8) high accuracy and high-resolution phase shifter; 9) frequency tunability, within a small frequency range and / or a large frequency range; and 10) optimal unequal combining or splitting.

The invention discloses a self-interference suppression method based on MVDR joint coordinate return-to-zero, and the method comprises the steps: receiving signal data through each array element, and carrying out the estimation of the direction of arrival of a desired signal through a DOA algorithm; processing the signal data by using an MVDR beam forming algorithm based on the desired signal direction of arrival; mapping the residual error signal data after array processing into a Walsh domain, and taking any code element as information for processing; the method comprises the following steps: performing amplitude truncation on a signal in a Walsh domain, suppressing a relatively strong self-interference component, and returning to a time domain through inverse mapping, judging whether to perform amplitude truncation operation by utilizing a relationship between a signal after Walsh domain transformation and a defined threshold value, when the signal in the Walsh domain is greater than or equal to the defined threshold value, truncating the strong self-interference component in the signal in the Walsh domain, and performing zero setting, so that the self-interference component in the signal in the Walsh domain is suppressed. According to the method, efficient target signal extraction and interference suppression under the condition that the target direction is unknown are realized, and the overall suppression depth is improved.

A multi-unit wavelength selective switch (WSS) is disclosed. The WSS includes a plurality of WSS units, each WSS unit comprising a waveguide array for providing a light beam for propagation in the multi-unit WSS, and for receiving, in a wavelength-selective manner, the light beam propagated in the multi-unit WSS. A polarizing collimator splits each light beam into polarized collimated first and second sub-beams propagating in the multi-unit WSS along separate optical sub-paths. The polarized sub-beams of each light beam may be redirected by separate redirector arrays, e.g. liquid crystal on silicon (LCoS) arrays of a redirector array assembly specific to each light beam launched into the multi-unit WSS. Using separate redirector arrays to handle polarization sub-beams provides for a greater flexibility of optical configuration, allowing the use of inexpensive, off-the-shelf redirector arrays.

A method is provided for automatically placing and routing processing elements (PEs), where each PE has limited connectivity to its neighbors. The method may obtain layout primitive (PP) position window information that defines possible positions of a set of PPs within a coarse-grained reconfigurable array (CGRA). The method may obtain hardware constraints with respect to the PE array, the hardware constraints including local connectivity constraints and remote connectivity constraints. The method may receive a computational graph (CG) representing a mathematical expression to be computed by the PE array. The method may determine a location of the PE in the PE array based on the CG, the PP location window information, and hardware constraints.

This document describes techniques and systems for radar systems with an angle determination process for sparse uniform arrays. The described radar systems include a processor and an antenna that can receive electromagnetic energy reflected by an object in a surrounding environment. The antenna includes a one-dimensional (ID) or two-dimensional (2D) sparse array. The processor can use the received electromagnetic energy to determine a signal subspace associated with the object that includes an invariance equation. Using an estimated solution of the invariance equation, the processor determines a solution of the invariance equation. The solution of the invariance equation is used to determine an angular phase associated with the object. The processor can then use the angular phase to determine an angle associated with the object. In this way, the described angle determination process enables a radar system with a sparse array to efficiently determine an angle associated with an object without blind spots.

The invention relates to the technical field of ultra-precision optical manufacturing, in particular to a fast tool planing method for a micro-lens array, a medium and equipment. The method comprises the steps that a non-interference feasible planing tool is determined according to surface shape data of a micro lens array to be machined; building a parameter physical model of planing fundamental frequency, surface roughness and single unit machining duration based on micro lens unit parameters, cutter parameters and machining parameters; by taking a parameter limiting condition as a nonlinear constraint and the total processing duration as a target function, optimizing and solving fs, Rt, DL and fx to obtain the shortest processing duration; and finishing machining by adopting optimized parameters. According to the method, a multi-physical parameter model is innovatively constructed, collaborative optimization of optical performance (surface shape), process capability (roughness and dynamic characteristics) and manufacturing efficiency (processing time) is realized, nanoscale roughness and dynamic stability are ensured, a large-scale array processing period is remarkably shortened, and an efficient path is provided for batch manufacturing of ultra-precise optical elements.

The invention discloses a multi-source information fusion device and method for a humanoid robot. The device comprises a clock synchronization module and a sensor array processing module. The clock synchronization module is used for generating and distributing a global clock according to a clock source signal of the clock device or clock information of the Ethernet interface, so that the global clock is used as a working clock of the humanoid robot-oriented multi-source information fusion device; the sensor array processing module is used for configuring an interface of the sensor array processing module so as to adapt to a plurality of accessed sensors; and the sensor array processing module is also used for transmitting the global clock to the plurality of sensors and receiving multi-source sensor signals obtained by synchronous sampling of the plurality of sensors. According to the invention, the plurality of sensors are flexibly accessed through the configurable sensor array processing module, and the clock synchronization of the plurality of sensors is realized by combining the clock synchronization module, so that the hardware adaptability and the clock synchronization precision of the plurality of sensors are improved.

A method in a relay device that comprises a plurality of antenna arrays, includes configuring first beamforming setting for first set of antenna arrays of the plurality of antenna arrays of the relay device to establish a first link between the relay device and a source device. A first data stream is received with a first beam pattern from the source device through the first link and a second data stream with a second beam pattern is forwarded to a destination device through second link without de-modulating the first data stream. The method includes phase shifting, by antenna array of the plurality of antenna arrays, an incoming signal stream and an outgoing signal stream by a different value for each element within the first set of antenna arrays to minimize an interference between the incoming signal stream and the outgoing signal stream, respectively, through the phase shifting.

Methods and systems are described herein for adaptive beamforming and interference mitigation using a time synchronized scalable cohered on-array processing system (“system”). The system may be a phased array implementing a software-defined radio using multi-input-multi-output antenna elements. The system includes multiple subarray elements which are configured into a tiered array of scalable subarrays that performs intermediary collation, coherence, noise reduction, and adaptive beamforming operations through processor nodes disposed between tiers. The intermediary collation operations process discrete portions of node excitation data to enable the phased array to generate an adaptive beam profile that directs high-directionality beams toward desired targets while adaptively partitioning interference sources between subarray elements. Further, the system makes use of a scalable multidimensional array to provide telecommunication and electromagnetic wave manipulation operations for applications of varying scale.

The present invention discloses a time-domain array processing method for underwater acoustic single-carrier communication based on an ultra-short baseline array, which belongs to the field of underwater acoustic communication. Specifically, each array element in the ultra-short baseline array uses a copy-related frame synchronization technology to process the single-carrier signal received simultaneously and estimate the integer delay portion. Then, each array element refines the integer delay through a three-point interpolation method to accurately calculate the fractional delay. After the signal is down-converted, phase compensation is performed on the fractional delay. Next, each array element estimates its own signal-to-noise ratio and performs weighted processing, adaptively adjusting the weighting factor. Finally, the signals that have undergone delay compensation and weighted processing are added and combined, and a single-carrier time-domain equalization method is applied to eliminate multipath interference. A decision feedback equalizer (DFE) is used to equalize the signal to further improve the reliability of the signal. The present invention improves the accuracy of signal reception. The method is simple, has low complexity, and is suitable for practical applications.

The present invention discloses a method for processing a maskless dendritic silicon nanostructure array and a silicon wafer prepared therefrom. The processing method comprises pretreatment, a first laser induction step, a second laser induction step, and electrodeposition. The processing method employs two stages of laser induction and a single electrodeposition step. Laser induction eliminates the need for a mask, thus preventing damage and contamination to the silicon nanostructure array during mask removal. Furthermore, biomimetic patterning of the silicon wafer's surface microstructure is achieved. The silicon wafer processed using this method, due to the microchannels formed within the maskless dendritic silicon nanostructure array, enables efficient capillary mass transfer along the microchannel walls. Furthermore, the dendritic silicon nanostructures have a large specific surface area, enabling efficient evaporative heat transfer perpendicular to the microchannels, thereby improving the heat transfer limit.

The invention relates to the technical field of trenchless engineering, and discloses a long-distance heat distribution pipeline pipe-jacking track control system for complex geology, which comprises an ultrashort pulse laser used for generating a stable laser plasma channel along a pipe-jacking design axis as an absolute linear reference; the track correction module is used for correcting the accumulated error of the inertial navigation unit on line according to the detection result of a position sensitive detector on the pipe jacking machine on the channel; the sensing array self-calibration module is used for carrying out on-line self-calibration of three-dimensional coordinates on the distributed optical fiber earth sound sensing array laid along the line by using acoustic shock waves generated during channel generation; and the geological feed-forward module is used for processing the tunneling vibration signal by using the calibrated sensing array to generate a front geological model. According to the method, the problems of inertial navigation error accumulation and insufficient geological prediction capability are solved, and the precision and stability of long-distance pipe jacking track control are remarkably improved.

The invention discloses a single-board multimode sonar device for underwater human body detection. The single-board multimode sonar device comprises a PCB; the PCB is provided with a foresight transducer interface, a side scanning transducer interface and a DVL interface. A pulse driving and transmitting / receiving switching protection circuit, a multi-channel analog front end (AFE), an analog-to-digital converter (ADC), a field programmable gate array (FPGA) processing unit, a peripheral memory of the FPGA processing unit and a high-speed data transmission interface are also integrated on the PCB; the FPGA is configured to perform channel-by-channel matched filtering, envelope detection, whole sampling alignment, fractional sampling delay filtering, delay-and-sum beam forming, motion compensation implemented based on speed or displacement information provided by the multi-beam Doppler velocity measurement interface, and confidence-weighted foresight and side-scan image fusion on echo signals from the ADC. And the fused human body / seabed echo image is output through the high-speed data transmission interface. According to the invention, the pulse driving, the receiving front end and the coherent clock distribution are realized on the same circuit board, and the digital alignment and fusion algorithm is implemented in the FPGA, so that the wiring and phase errors are obviously reduced, and the echo coherence and the motion correction capability are improved.

The invention discloses a miniaturized high-performance satellite navigation intelligent anti-interference method, which relates to the technical field of satellite navigation and artificial intelligence, realizes anti-interference by combining compressed sensing MUSIC super-resolution DOA estimation and manifold optimization, and realizes super-resolution DOA estimation under an unknown steering vector through compressed sensing MUSIC. And an optimal beam forming weight is solved on a complex unit spherical surface in combination with manifold optimization, and finally efficient interference resistance is realized in the Beidou B1 and GPS L1 frequency bands. Balance of miniaturization, low power consumption and high performance is achieved through algorithm innovation, array processing Rayleigh limit constraint is broken through from the perspective of an anti-interference signal processing algorithm, and low-power-consumption and low-resource lightweight deployment can be achieved while the anti-interference performance is guaranteed.

The present invention discloses a self-interference suppression method based on MVDR combined with coordinate zeroing, comprising receiving signal data through each array element, estimating the direction of arrival of a desired signal using a DOA algorithm; processing the signal data using an MVDR beamforming algorithm based on the direction of arrival of the desired signal; mapping the residual error signal data after array processing into a Walsh domain, and taking any code element therein as information for processing; performing amplitude truncation on the signal in the Walsh domain to suppress a strong self-interference component, and returning to the time domain through inverse mapping. The present invention determines whether to perform an amplitude truncation operation by utilizing the relationship between the signal after Walsh domain transformation and a defined threshold. When the Walsh domain signal is greater than or equal to the defined threshold, the strong self-interference component in the Walsh domain signal is truncated and reset to zero. When the Walsh domain signal is less than the defined threshold, the original value is retained. The present invention realizes efficient target signal extraction and interference suppression in the case of unknown target direction, thereby improving the overall suppression depth.

The present invention discloses a hollow cylindrical inner surface microlens array processing technology and processing system, the hollow cylindrical inner surface microlens array processing technology includes the following steps: S10: confirming that the morphological feature is within the servo processing range of the two-dimensional elliptical vibration device; S20: building a processing system; S30: obtaining tool parameters and cutting parameters; S40: generating the servo trajectory of the two-dimensional elliptical vibration device and the X-axis and Z-axis motion paths of the machine tool; S50: determining the processing compensation; S60: starting the processing system and performing processing. The processing system is used for the hollow cylindrical inner surface microlens array processing technology. The hollow cylindrical inner surface microlens array processing technology and processing system realize the processing of a microlens array with a free-form surface morphology on the inner surface of the cylinder, and can complete the processing of a three-dimensional structure, with high processing surface accuracy, surface roughness reaching the nanometer level, and a variety of processable materials.

The present invention discloses a system and method for locating vibration sensitive points of an electric spindle based on noise detection. The platform base of the system is installed on the top surface of the support frame through a support plate, the electric spindle fixing seat is installed on the top surface of the platform base, the electric spindle is installed on the electric spindle fixing seat, and the sensor assembly is installed on the platform base. The method includes: installing the electric spindle and the microphone; receiving the noise signal generated by the electric spindle through the microphone; obtaining the sound pressure level of the noise generated in the noise test area, and obtaining the orientation of the noise source after filtering, weighting and sound source array processing of the noise signal; determining the vibration sensitive point of the electric spindle based on the sound pressure level and orientation to achieve positioning. The present invention combines the noise characteristics and vibration characteristics of the electric spindle, determines the vibration sensitive point of the electric spindle based on the orientation of the noise source and the noise sound pressure level, solves the problem of incomplete selection of vibration sensitive points and difficulty in accurately grasping the overall vibration characteristics of the electric spindle, and can improve the accuracy of the vibration data of the electric spindle.

The invention discloses an array processing method and device, electronic equipment and a storage medium, and relates to the technical field of array processing. The method comprises the following steps: creating an initial array according to a preset initial capacity, and setting a first reference space at the tail end of the initial array; wherein the first reference space is used for storing a first address of a capacity expansion array or an array reference table; in the process of storing the target data in the initial array, when it is judged that the capacity of the initial array is full and the target data is not completely stored, array dynamic capacity expansion processing is conducted on the basis of the first reference space, the expanded array is obtained, and the target data continues to be stored in the expanded array. According to the method and the device, the array dynamic capacity expansion can be realized under the condition of maintaining good system performance.

This invention relates to the field of ultra-precision machining technology, and particularly to a method, medium, and equipment for obtaining the tool entry distance in the machining of large-scale microlens arrays. The method targets the tool positioning point within the aspherical surface region of the microlens unit. It discretizes the tool tip arc into spatial points and maps them to the workpiece coordinate system. The normal vector of each discrete point on the workpiece surface is obtained through the aspherical analytical expression. The absolute value of the inner product between the tool's discrete tangent vector and the workpiece normal vector is calculated, and the point with the minimum value is selected as the true contact point. Based on the Z-coordinate difference of this point, the Z-axis compensation is calculated as the tool entry distance. This method overcomes the limitations of traditional empirical compensation by dynamically reflecting the local contact relationship between the tool and the aspherical surface through the inner product criterion, avoiding systematic errors. Because the radius of the tool tip arc is smaller than the minimum radius of curvature of the microlens, it ensures that the contact point is a unique tangent point, effectively preventing overcutting of concave surfaces or high-curvature regions, and achieving high-precision machining.

The present invention discloses a preparation method of a piezoelectric micropump based on array processing and segmentation and the obtained piezoelectric micropump; the method is as follows: processing a sheet material to form a plurality of identical device units; multiple sheet materials respectively form single-layer array structures corresponding to different device layers of the piezoelectric micropump pump body. Aligning and bonding to form a whole-board array pump body structure including multiple pump bodies. Dicing to separate independent pump bodies. The present invention can obtain a single-layer array structure with array device units through chemical etching, photolithography and laser processing; by bonding and then dicing the single-layer array structures of different devices, multiple independent piezoelectric micropumps can be obtained synchronously. Such a preparation process can prepare piezoelectric micropumps in plates, effectively improving the production efficiency of piezoelectric micropumps and making the piezoelectric micropumps have higher stability and consistency.

Methods and systems are described herein for adaptive beamforming and interference mitigation using a time synchronized scalable cohered on-array processing system (“system”). The system may be a phased array implementing a software-defined radio using multi-input-multi-output antenna elements. The system includes multiple subarray elements which are configured into a tiered array of scalable subarrays that performs intermediary collation, coherence, noise reduction, and adaptive beamforming operations through processor nodes disposed between tiers. The intermediary collation operations process discrete portions of node excitation data to enable the phased array to generate an adaptive beam profile that directs high-directionality beams toward desired targets while adaptively partitioning interference sources between subarray elements. Further, the system makes use of a scalable multidimensional array to provide telecommunication and electromagnetic wave manipulation operations for applications of varying scale.

Methods and apparatus to estimate cardinality of users represented across multiple bloom filter arrays are disclosed. Examples includes processor circuitry to execute and / or instantiate instructions to generate a first composite Bloom filter array based on first and second Bloom filter arrays. The processor circuitry is to generate a final composite Bloom filter array based on the first composite Bloom filter array and a third Bloom filter array. Different ones of the first, second, and third Bloom filter arrays representative of different sets of users who accessed media. The first, second, and third Bloom filter arrays including differential privacy noise. The processor circuitry to estimate a cardinality of a union of the first, second, and third Bloom filter arrays based on the final composite Bloom filter array.

The application discloses a kind of multi-bridge site stamping extension forming plate and its processing method, six-stage process of adopting blank pretreatment, symmetrical positioning hole processing, stepped stamping bridge site forming, laser hole array processing, oblique extension forming, normal temperature leveling and shaping is formed.By stepped sectional pressure forming, it is ensured that bridge body is uniform and stable, high-precision forming hole is processed by pulse fiber laser, 5°-15° oblique extension and double-side synchronous constant clamping are used to realize the uniform flow of material, and residual stress is eliminated after leveling.The application can make the width of plate uniform and narrow, the extension size error is controlled within ±0.1mm, the flatness is ≤0.05mm / m, the waist type defect is completely eliminated, the forming stability and material utilization rate are improved, the automatic continuous stamping production of high elongation rate plate is adapted, and the forming qualified rate is high and the size consistency is good.

The invention discloses an energy-saving low-specific-speed multi-channel impeller and a design method thereof, the number N of multiple channels is larger than or equal to 3, and the design method comprises the following steps that (1) the specific speed ns is calculated according to the design flow Q, the design lift H and the design rotating speed n, and ns is smaller than or equal to 100; (2) selecting a proper impeller diameter D, and drawing a flow channel middle line axial plane projection drawing; (3) drawing a spiral line, and projecting to obtain a space center line of the runner; (4) calculating the inlet diameter D1 of the impeller; (5) the impeller inlet area S1 and the impeller outlet width b are calculated; (6) designing the geometric shape of the flow channel on the space center line in a segmented manner; (7) connecting the shape of each section of runner to form a runner curved surface; (8) carrying out annular array processing on the single flow channel; and (9) obtaining an impeller model. According to the multi-channel impeller, the flow channel diffusion degree of the multi-channel impeller can be accurately controlled, and particularly, effective balance and improvement of efficiency and reliability are achieved at the low specific speed.

Systems and methods are provided for reducing the computational complexity and all-to-all (A2A) communication within virtual sub-arrays (VSAs) while enabling distributed parallel edge processing. This can help solve the beamforming problem described by The United States Defense Advanced Research Projects Agency (DARPA) state of the art array processor (SOAP) unclassified program. The use of all-digital transmit / receive antenna apertures for adaptive beamforming algorithms necessitate inversion of large matrices. The matrix inversions become intractably difficult for emerging all-digital apertures. This complexity problem associated with large all-digital aperture arrays can be solved with a two-level approach.

A method for automatically placing and routing processing elements (PEs), where each PE has a limited connectivity to its neighbors. The method may obtain placement primitive (PP) location window information, the location window information defining possible locations of a group of PPs within a coarse-grained reconfigurable array (CGRA). The method may obtain hardware constraints regarding the array of PEs, the hardware constraints comprise local connectivity constraints and remote connectivity constraints. The method may receive a computation graph (CG) that represents mathematical expressions to be calculated by the array of PEs. The method may determine a location of the PEs of the array of PEs based on the CG, the PP location window information, and hardware constraints.

The application discloses a kind of L array DBF goniometry methods for LFMCW radiation source, the data received by L array is down-converted and extracted filtering in FPGA then according to two-dimensional linear array processing, utilize the advantage of parallel processing of FPGA, when DBF processing, two parallel routes of search and processing are divided, then the idea of two linear arrays and difference beam is FFT processed using the IP of FFT, after the result is converted into single-precision floating-point number, the data in FPGA is transmitted to ARM using the AXI IP of Zynq for subsequent processing and angle conversion.The application utilizes the low data amount DBF processing method, realizes the efficient transmission of data between FPGA and ARM by combining the AXI data line of Zynq series, greatly improves the overall performance of signal processing machine, ensures basic goniometry function while enhancing the real-time processing capability of system.