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193 results about "Coded element" patented technology

Code element. [′kōd ‚el·ə·mənt] (communications) One of the separate elements or events constituting a coded message, such as the presence or absence of a pulse, dot, dash, or space.

Optimized regression testing through dependency graph analysis and selective test execution

A method is provided for optimizing regression testing in a software development environment. The method includes analyzing source code to create a structural dependency graph that maps dependencies between code elements; identifying changes in the source code between a current version and a previous version; mapping the identified changes onto the structural dependency graph to determine affected code elements; selecting a subset of regression tests based on the affected code elements identified in the dependency graph; and executing the selected subset of regression tests to validate the changes in the source code.
Owner:PILLAY SANJAY

Aliasing image intelligent deformation small target identification algorithm based on detector multiplexing

The invention relates to an aliasing image intelligent deformation small target identification algorithm based on detector multiplexing, and relates to the technical field of aliasing image target identification, and the algorithm comprises the steps: designing a detector multiplexing optical system; designing a view field coding element, and splicing the whole system; simulating and generating a motion track of the early warning target under the space-based background; the target motion trail is imaged through a detector multiplexing optical system; aliasing video simulation of moving target imaging is carried out; an intelligent deformation small target recognition algorithm is applied to the aliasing image, and a moving target is recognized; target resolution and field-of-view positioning are realized by using the relevance between the inter-frame track of the moving target and the light spot shape. According to the aliasing image intelligent deformation small target recognition algorithm based on detector multiplexing, light originally imaged on a large-area-array detector is folded and imaged on a small-area-array detector, and therefore the purpose that the small-area-array detector receives large-view-field imaging is achieved.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI

Automated container orchestration platform testing

In some implementations, a device may obtain, via a notebook repository, one or more training notebooks that are associated with respective pipeline types of the container orchestration platform. The device may extract, from the one or more training notebooks, one or more executable code elements, to obtain one or more sets of executable code for respective training notebooks of the one or more training notebooks. The device may insert testing information into respective sets of executable code of the one or more sets of executable code to generate one or more test pipelines. The device may perform, via the container orchestration platform, one or more cluster tests using respective test pipelines from the one or more test pipelines. The device may provide, for display, result information indicating results of the one or more cluster tests.
Owner:CAPITAL ONE SERVICES LLC

System and Method for Compaction of Floating-Point Numbers Within a Dataset with Metadata Tagging

A system and method for multi-level compaction of floating-point numbers and associated metadata within datasets. The system identifies floating-point numbers and their associated metadata, pre-encodes numbers into binary string representations, and encodes metadata into compact binary form. These encoded elements are linked together and indexed to indicate they represent floating-point numbers with metadata. The dataset is organized into multiple compaction levels based on semantic relationships between metadata elements. The system creates specialized indices for metadata-based retrieval, maintains relationship maps, and implements inheritance policies across hierarchical levels. During retrieval, the system reconstructs both the original floating-point values and their associated metadata, preserving hierarchical relationships. This approach enables more intelligent data organization, richer contextual information preservation, and more powerful query capabilities while maintaining efficient floating-point compaction.
Owner:ATOMBEAM TECH INC

Method, device, equipment and product for updating source code

The invention relates to a method, a device, equipment and a product for updating source codes. The method includes generating a page structure tree based on source code, page structure nodes in the page structure tree corresponding to code elements in the source code, and the page structure nodes including tracking information for tracking positions of the code elements in the source code. The method further includes obtaining adjustments by the user to user interface elements corresponding to the page structure nodes through the user interface. In addition, the method includes updating a code element in the source code based on the adjustment and the trace information in the page structure node.
Owner:BEIJING ZITIAO NETWORK TECH CO LTD

Code analysis method and device, electronic equipment and computer program product

The invention discloses a code analysis method and device, electronic equipment and a computer program product. The method relates to the field of artificial intelligence, and comprises the following steps: analyzing a source code to be analyzed to obtain an abstract syntax tree of the source code; running the source code, and collecting running data of the source code through a preset monitoring point; constructing an initial graph based on the abstract syntax tree and the operation data; inputting the source code into the target model to obtain a hidden dependency relationship among code elements in the source code; the directed edge in the initial map is corrected based on the hidden dependency relationship, a target map of the source code is obtained, and the target map is used for representing the circulation path and the dependency relationship between the code elements. By means of the method and device, the problem that in the related technology, omission possibly exists due to the fact that code blood relationship analysis is only conducted through static analysis, and consequently the analysis result is inaccurate is solved.
Owner:INDUSTRIAL AND COMMERCIAL BANK OF CHINA

Automatic generation of assert statements for unit test cases

An assert statement generator employs a neural transformer model with attention to generate candidate assert statements for a unit test method that tests a focal method. The neural transformer model is pre-trained with source code programs and natural language text and fine-tuned with test-assert triplets. A test-assert triplet includes a source code snippet that includes: (1) a unit test method with an assert placeholder; (2) the focal method; and (3) a corresponding assert statement. In this manner, the neural transformer model is trained to learn the semantics and statistical properties of a natural language, the syntax of a programming language, and the relationships between the code elements of the programming language and the syntax of an assert statement.
Owner:MICROSOFT TECHNOLOGY LICENSING LLC

User interface controls for visual software modification

Techniques for visual software development are disclosed, including: (a) generating, by a visual code editor, (1) a data model of a plurality of code elements in a set of source code and (2) a kernel for execution of the set of source code; (b) based on a subset of the set of source code, the data model, and the kernel, generating an adjustable graphical user interface (GUI) form control; (c) presenting the adjustable GUI form control in alignment with the set of source code in a GUI of the visual code editor; and (d) responsive to user input in the GUI to adjust the adjustable GUI form control: (1) modifying the subset of source code and the data model according to the user input; (2) updating the presentation of the set of source code in the GUI to reflect the modified subset of source code; and (3) executing the modified set of source code, thereby updating variable values within the kernel.
Owner:WATERSHED INFORMATICS INC

LLM-powered threat modeling

Techniques for implementing an AI threat modeling tool are disclosed. A static analysis tool is used to extract a candidate code snippet from a code repository. The candidate code snippet is identified as potentially being a security relevant code element. The static analysis tool generates additional context associated with the candidate code snippet. An LLM prompt is generated. This prompt is structured to include the candidate code snippet, the context, and a directive to assign a classification to the candidate code snippet. The classification includes a source classification, a sink classification, a sanitizer classification, or a flow step classification. The LLM operates on the prompt to generate output comprising a specific classification for the candidate code snippet. The output is formatted into a data extension file that is consumable by the static analysis tool.
Owner:MICROSOFT TECHNOLOGY LICENSING LLC

Autoantibody spectrum detection platform based on liquid phase chip technology and application

The invention relates to the technical field of liquid phase chips, in particular to an autoantibody spectrum detection platform based on a liquid phase chip technology, and the method comprises the following steps: preparation and functionalization of quantum dot encoding microspheres; the core-shell structure quantum dots are used as coding elements, and fluorescence coding combination of more than 1000 is realized by regulating and controlling the size, 3-10nm, Mn < 2 + > doping and spatial distribution of the quantum dots. The method has the advantages of super multi-target detection, super sensitivity, strong anti-interference capability and intelligent analysis, in the actual process, the core-shell structure quantum dots are adopted as coding elements, more than 1000 fluorescent coding combinations are realized by regulating and controlling the size, doping and spatial distribution of the quantum dots, high-density coding is realized by utilizing three-parameter coding and an orthogonal decoupling algorithm, and the method is suitable for large-scale industrial production. More types of autoantibodies can be detected at the same time, so that the detection flux is improved; the surfaces of the quantum dots are coated with silicon dioxide layers, and the fluorescence intensity is attenuated by lt under continuous laser irradiation; and the stability of a fluorescence signal in the detection process is ensured.
Owner:南京市江宁医院

Decoding method and decoding system for Manchester coded signals

The invention relates to a Manchester coded signal decoding method and a Manchester coded signal decoding system, and belongs to the field of electronic information, communication and power system automation. A plurality of clocks with the same frequency and different phases are generated according to Manchester encoding signals, the clocks are used for sampling the signals, a phase-shifting clock sampling method is used, dependence on a high-frequency clock is reduced, most interference in communication signals is determined to be eliminated according to a majority voting strategy for sampling results, and the accuracy of the signals is improved. And the seriously distorted signals are corrected according to special value enumeration, so that the interference of signal duty ratio distortion and burrs is reduced, and the decoding reliability is further improved. And finally, determining an original data stream of the signal according to the two level states of each code element. The method is used for decoding high-speed and ultra-high-speed Manchester encoding signals under the conditions of no high-frequency clock, poor data signal quality or unstable clock, and simultaneously realizing self-adaptive communication of different encoding formats.
Owner:XJ ELECTRIC CO LTD +1

Wireless ranging method and system based on programmable logic architecture

The invention discloses a wireless ranging method and system based on a programmable logic architecture, and belongs to the technical field of indoor positioning, and the method comprises the following steps: receiving an original data frame of a processing module, adding a synchronization frame header and a synchronization frame tail, then carrying out linear frequency modulation spread spectrum coding to form a ranging request frame, recording the sending time, and sending the ranging request frame to a target receiving end; after a ranging response frame is received, a decoded data frame is generated through decoding processing such as time domain filtering and peak detection, coherent accumulation is carried out by taking a first target code element as a reference, a target array is extracted, interpolation refining is carried out to obtain a fine time component, and the arrival time is obtained through multipath elimination. According to the method, main signal energy is enhanced through coherent accumulation, multi-path interference is suppressed in combination with interpolation refinement and time domain filtering, the time measurement precision is improved, and software and hardware cooperative efficient distance measurement is realized.
Owner:SUZHOU CHUYIJIE TECH CO LTD +2

Vulnerability detection method, electronic device, storage medium and computer program product

The invention provides a vulnerability detection method, electronic equipment, a storage medium and a computer program product, and relates to the technical field of computers. The method comprises the following steps: acquiring a code semantic map of a to-be-detected item; performing test analysis on the to-be-detected item to obtain a vulnerability detection path of the to-be-detected item; and sending a vulnerability detection request to the large language model. And if missing element information returned by the large language model for the vulnerability detection request is received, matching nodes in the code semantic map based on the missing element information. And for each code element in the missing element information, determining a target node from the matched node based on the semantic association degree between the node matched with the code element and the vulnerability detection path, thereby sending a new vulnerability detection request to the large language model. By implementing the method and the device, the code context information can be accurately provided when the big language model is adopted for vulnerability detection, and the vulnerability detection accuracy is improved.
Owner:NANJING GLORY SOFTWARE TECH CO LTD

Method, Apparatus and System for Three-Dimensional Reconstruction

Disclosed in the present application are a method, apparatus and system for three-dimensional reconstruction. The method includes: acquiring a first image and a second image, wherein the first image and the second image are respectively obtained by means of different image collection devices collecting a predetermined code element image projected onto the surface of an object to be measured; acquiring a first target pixel point of each code element in the first image, and determining, in the second image, a matched pixel point for the first target pixel point of each code element in the first image; and determining the three-dimensional coordinates of the first target pixel point at least according to the predetermined pixel point coordinates of the first target pixel point in the first image and the predetermined pixel point coordinates of the matched pixel point in the second image, so as to complete three-dimensional reconstruction.
Owner:SHINING 3D TECH CO LTD

QPSK (Quadrature Phase Shift Keying) non-cooperative navigation signal analysis method and system for multi-domain feature joint estimation

The invention relates to the technical field of navigation signal analysis, in particular to a QPSK (Quadrature Phase Shift Keying) non-cooperative navigation signal analysis method and a QPSK non-cooperative navigation signal analysis system for multi-domain feature joint estimation. Traversing phases in the phase sequence in sequence, and obtaining an energy threshold value in combination with the center frequency estimation value of the current section; performing iterative analysis on the frequency and the phase to obtain estimated values of the frequency and the phase; obtaining a complex baseband signal through the estimated values of the frequency and the phase; judging whether IQ code crossing occurs or not according to a cross-correlation relationship between the complex baseband signal and a local code stream sequence, and if the code crossing occurs, performing adjustment to obtain a corrected I-path baseband signal and a corrected Q-path baseband signal; adjusting the length of a chip through a code rate so as to reconstruct a code element sequence and obtain I-path and Q-path pure code element sequences; and taking the I-path and Q-path pure code element sequences as analysis results of the non-cooperative navigation signals. According to the invention, the accuracy of analyzing the non-cooperative navigation signal is improved.
Owner:NAT TIME SERVICE CENT CHINESE ACAD OF SCI

Continuous wave mud pulse code modulation method, device, equipment and storage medium

The invention provides a continuous wave mud pulse code modulation method, device and equipment and a storage medium, and belongs to the technical field of oil and gas drilling. The method comprises the following steps: encoding detected target acquisition information into a multi-system code element; two code elements are taken as a group to form a code element group, and the code element group controls the rotating speed of a rotor together to form a modulated pressure wave signal for determining a phase delay degree and a phase switching position corresponding to the phase delay degree; wherein the phase switching position is a time period when the corresponding phase delay degree occurs in a modulation period of the code element group to the pressure wave signal. According to the invention, on the premise of not additionally occupying frequency band resources, the transmission information amount is doubled, so that the signal transmission rate based on the continuous wave mud pulse is doubled, and the defect of low transmission rate in the traditional code modulation mode for the continuous wave mud pulse is overcome.
Owner:CHINA NAT PETROLEUM CORP +1

Material data vectorization coding and index matching method and system

The invention provides a material data vectorization coding and index matching method and system, and the method comprises the steps: coding elements contained in each material into a plurality of integer fields through employing the characteristic that the number of chemical elements is limited, and constructing a B + tree index for each field in a database; meanwhile, a target element set in the retrieval stage is coded into integer vectors, materials containing specific element sets are quickly retrieved in a multi-integer-field matching mode, multi-dimensional feature coding representation is conducted on material data, multi-dimensional retrieval of the material data is met, material information is fully utilized to establish an all-around efficient retrieval mechanism, and the retrieval efficiency is improved. The matched material data can be accurately and quickly retrieved, and the accuracy of material data identification and the consistency of coding are improved.
Owner:SHANGHAI JIAOTONG UNIV +1

Material code automatic mapping and conversion method of cross-coding system

The invention relates to the technical field of material management, in particular to a cross-coding system material code automatic mapping and conversion method, which provides basic data support for dynamic mapping by acquiring historical material codes and mapping codes thereof as a training verification set and extracting structural feature vectors and code element value ranges of coding systems. A material code is subjected to sliding segmentation by utilizing a segmentation window technology, and a source coding system is determined by combining structural similarity and a code element value range, so that dynamic analysis and inverse coding processing of a complex coding structure are realized; and quality evaluation and parameter correction are carried out based on the similarity between the converted code and the mapping code, and limitation of static transcoding is avoided. According to the automatic mapping and conversion method for the material codes of the cross-coding system, the adaptive capacity and the dynamic adjustment capacity of transcoding are remarkably improved, and an effective scheme is provided for conversion and mapping of the codes in the large-scale material coding system.
Owner:BEIJING KINGDOES RFID TECH

A method for estimating the number of code elements in a pulse of phase-coded radar signals

The present invention belongs to the field of radar signal processing and analysis technology and discloses a method for estimating the number of code elements within a pulse of a phase-coded radar signal. For an input baseband digital signal, the instantaneous frequency is calculated and processed, and the number of code elements corresponding to the peak amplitude correlation value is searched to obtain the optimal number of code elements. The method primarily includes calculating the unfolded phase of the input signal and filtering it using a differential filter to obtain the instantaneous frequency; removing average frequency deviation, edges, outliers, and low-value processing, creating corresponding reference data, calculating amplitude correlation values, and searching for the number of code elements corresponding to the maximum correlation value. This method is not limited to the type of phase-coded signal or the frequency deviation of the pulse and can also adapt to situations where pulse edge estimation is inaccurate. The instantaneous frequency can be obtained by filtering using a differential filter or by instantaneous phase differential. The subsequent process remains the same, and the number of code elements can still be estimated. The calculation speed is fast and engineering implementation is convenient.
Owner:BEISHITONG ELECTRONIC TECH (SHANGHAI) CO LTD

A method, system, device and medium for SSVEP-based brain-computer interface stimulation modulation

The application provides a SSVEP-based brain-computer interface stimulation modulation method, system, device and medium, comprising the following steps: acquiring a preset code sequence set, a stimulation frequency set and a stimulation paradigm; the code sequence set comprises a plurality of code sequences; the code sequence comprises a plurality of code elements, and the code element corresponds to a brightness amplitude depth coefficient; the stimulation frequency set comprises a plurality of stimulation frequencies; the stimulation paradigm is used for modulating the brightness amplitude depth and the flicker frequency of visual stimulation based on the code sequence and the stimulation frequency; based on the code sequence and the stimulation frequency, a code stimulation combination of the code sequence and the stimulation frequency is generated; and based on the code stimulation combination, the visual stimulation corresponding to each stimulation block is modulated by using the stimulation paradigm. The SSVEP-based brain-computer interface stimulation modulation method, system, device and medium provided by the application not only expand the number of stimulation targets, but also improve the comfort of users when gazing at the visual stimulation.
Owner:SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI

Cable coding method, system and device and storage medium

The invention discloses a cable coding method, system and device and a storage medium, and the method comprises the steps: dividing preparation cable data according to an opposite system, and obtaining first grouping data; classifying cable data with the same data attribute in the first-time grouped data into the same group to obtain second-time grouped data; for each target cable in the second-time grouped data, determining a plurality of coding elements based on a corresponding relationship between the second-time grouped data and the coding elements; and according to a preset combination mode, combining the plurality of coding elements to generate a cable code of the target cable. And full-process automation from data input to code output is realized. Compared with a manual splicing coding mode, the problems of manual calculation errors, spelling errors and the like are thoroughly avoided, and it is ensured that the generated cable codes meet rule requirements.
Owner:CHINA TECHENERGY

Instrument data acquisition system and acquisition method

The invention belongs to the technical field of digital information transmission, and particularly relates to instrument data acquisition, in particular to an instrument data acquisition system and an instrument data acquisition method.According to the instrument data acquisition system, after acquisition equipment is connected with instrument equipment, a time parameter of a first code element is obtained; the Baud rate is preliminarily determined according to the time parameter of the first code element, data acquisition is carried out according to the preliminarily determined Baud rate, an oscillogram is constructed according to the acquired data, the final Baud rate is determined in the oscillogram according to the effective area, and after the final Baud rate is determined, data interaction is carried out between the instrument equipment and the final Baud rate. Therefore, the Baud rate of the instrument equipment can be quickly and accurately determined, the acquisition equipment can conveniently adopt the Baud rate corresponding to the instrument equipment for communication, and accurate transmission of instrument data is completed.
Owner:JIANGSU XIAOLUN TECH CO LTD

Encoding elements and speckle spectrometer based on micro- and nano-fibers and scattering medium substrates

The present application relates to a kind of based on micro-nano fiber and scattering medium substrate coding element and speckle spectrometer.The coding element includes sealed cavity, micro-nano fiber and scattering medium substrate;Including drawstring transition zone and waist zone in the body of micro-nano fiber, drawstring transition zone forms leaky mode, waist zone generates evanescent field, the body of micro-nano fiber penetrates sealed cavity, so that drawstring transition zone and waist zone are located in sealed cavity;Scattering medium substrate is fixed in sealed cavity, and the waist zone of micro-nano fiber is overlapped on scattering medium substrate, scattering medium substrate is used to receive evanescent field and is coupled leaky mode to obtain scattering pattern information;Wherein, in the direction parallel to waist zone, scattering medium substrate includes more than two scattering zones, and the light transmittance of each scattering zone is different, and the difference between maximum light transmittance and minimum light transmittance is 20%~80%.Speckle spectrometer using the coding element of the present application has the advantages of small size, low cost while high spectral resolution.
Owner:ZJU HANGZHOU GLOBAL SCI & TECH INNOVATION CENT

A Feature Current Discrimination Method for Substation Area Topology Identification

The present invention relates to the technical field of low-voltage distribution network automation, and discloses a characteristic current discrimination method for substation topology identification, comprising the following steps: setting a characteristic frequency, a characteristic sequence S_1, a characteristic signal strength threshold, and the duration Tc of each code element at a signal receiving end; detecting S_1 with a sliding Fourier transform at the signal receiving end to obtain a sequence S_2 with the same number of bits as S_1; calculating the true signal strength P1 of the first 16 bits of S_2 with a sliding Fourier transform at the signal receiving end; comparing S_2 with S_1, if the deviation does not exceed m bits and P1 is greater than a threshold, the characteristic current is identified and the process ends; otherwise, the characteristic current is not identified and the calculation continues. The present invention reduces the probability of misidentification of the characteristic sequence without occupying too much chip resources and having almost no effect on the bit error rate, thereby reducing the reporting frequency of the receiving end, ensuring the reliability of micro-current communication, and thus ensuring the normal use of the master station and the accuracy of topology identification.
Owner:QINGDAO TOPSCOMM COMM +1

A discrete constant modulus quadrature phase encoding design method for multiple targets

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

Dependence relationship visualization method and device and storage medium

PendingCN121833023AAchieve technical effects of visual displayAccurately express complex dependenciesVersion controlProgram documentationTheoretical computer scienceData file
The invention discloses a dependency visualization method and device and a storage medium, and relates to the technical field of program analysis, and the method comprises the steps: obtaining and analyzing a metadata file, constructing a business element mapping relation based on the association between a code element and a use case as well as extension, then traversing all class files through a class reader, a method calling instruction list is generated based on the method calling information obtained through traversal and the business element mapping relation, and the method calling instruction list comprises a caller, a callee, a calling type and business target information; then, on the basis of the method calling instruction list, the method, the use case and the extension serve as nodes, the calling relation serves as an edge, and a graph data structure is constructed; and outputting the interactive dependency graph based on the graph data structure. According to the method, the technical effect of visually displaying the dependency relationship between the methods can be achieved.
Owner:GUANGZHOU PINWEI SOFTWARE CO LTD

Decoding method, encoding method, device, chip and computing device

The application provides a decoding method, an encoding method, a device, a chip and a computing device. The method comprises the following steps: a decoding device acquires a first matrix, and then decodes a first code word vector according to the first matrix to obtain a decoding result. The first matrix is a 0-1 matrix representing elements in a second matrix on a polynomial ring. The second matrix is a check matrix on a finite field 2q, and the number of rows is r and the number of columns is n. A first polynomial corresponding to the polynomial ring is a q-th irreducible polynomial on a binary field. The number of 1s in the first matrix is less than the number of 1s in the 0-1 matrix representation of the second matrix. The first code word vector comprises k information code elements and r check code elements, and n=k+r. Each code element comprises q data units, and each data unit comprises at least one bit. The scheme can effectively reduce the hardware implementation complexity and cost of RS encoding and decoding.
Owner:HUAWEI TECH CO LTD

Component carrier having code element and device for reading code element

The invention relates to a component carrier, to a device, to a device for reading an embedded code element of a component carrier, to a method for reading an embedded code element of a component carrier, to a method for producing a component carrier, to the use of a device or device in an automatic inspection machine for inspecting and / or verifying and / or repairing a component carrier. The component carrier comprises a stack comprising: a code element comprising an opaque portion and a first translucent portion; the at least one first layer structure comprises at least one second semitransparent part; wherein the at least one first layer structure and the code element are arranged such that respective translucent portions overlap, such that translucent regions connect at least two major surfaces of the stack.
Owner:AT & S CHINA

A carrier doppler shift and code doppler shift simulation method and apparatus

The application discloses a carrier Doppler frequency shift and code Doppler frequency shift simulation method and device. First, original optical carriers output by a light source module are received, and non-spur frequency shift of the original optical carriers is realized. A carrier Doppler frequency shift amount and a code Doppler frequency shift amount output by a synchronous control module are received. A periodic sawtooth wave signal frequency and a slope are updated based on the carrier Doppler frequency shift amount, and a frequency-shifted optical carrier signal is obtained. A sampling clock frequency is adjusted based on the code Doppler frequency shift amount, and a code Doppler simulation baseband code element signal is obtained. Finally, the code Doppler simulation baseband code element signal is loaded on the frequency-shifted optical carrier signal, an adjusted optical signal loaded with the optical carrier and the code Doppler frequency shift at the same time is obtained, and is output to a laser communication terminal to be measured. The problem of poor sufficiency of Doppler frequency shift simulation is solved.
Owner:CHINA STAR NETWORK SYST RES INST CO LTD

Brillouin optical time domain reflection signal decoding method and system based on rising edge assistance

The invention belongs to the field of distributed optical fiber sensing and coding and decoding, and provides a Brillouin optical time domain reflection signal decoding method and system based on rising edge assistance. The rising edge assistance-based Brillouin optical time domain reflection signal decoding method comprises the following steps: acquiring a time domain coding response signal corresponding to a coding pulse sequence injected into an optical fiber by a Brillouin optical time domain reflectometer; performing discrete Fourier transform on the time domain coding response signal to obtain a frequency domain coding response signal; according to the signal increment and the duration of the rising edge of the time domain coding response signal, reconstructing a decoding function and replacing the decoding function in the frequency domain coding response signal with the reconstructed decoding function; the decoding function is a sequence formed by a decoding weight corresponding to each code element; and performing inverse discrete Fourier transform on the frequency domain coding response signal to obtain a decoded signal. According to the method, the signal-to-noise ratio of the decoded SpBS signal can be remarkably improved, and the Brillouin frequency shift (BFS) extraction precision is enhanced.
Owner:SHANDONG UNIV