31 results about "Code tracking" patented technology

The invention discloses a two-dimensional code full-life-cycle tracking management system based on dynamic encryption, relates to the technical field of two-dimensional code tracking management, and is characterized in that a target object life cycle state sequence diagram is constructed, and a two-dimensional code coding index is dynamically generated based on a current state, an equipment environment and a time factor; and dynamic generation and secure binding of two-dimensional code content are realized in combination with a multi-factor asymmetric encryption mode. Meanwhile, through path consistency verification and state chain continuity judgment, validity verification is carried out on a two-dimensional code access behavior, and the validity of the two-dimensional code is judged in combination with an environment deviation detection mechanism; compared with the prior art, the method can effectively prevent the two-dimensional code from being counterfeited, replayed and visited unauthorized, improves the uniqueness, verifiability and safety of the two-dimensional code in the whole life cycle, and is suitable for high-safety product tracking, anti-counterfeiting authentication, multi-stage identity recognition and other scenes.

The invention discloses a GNSS-R terminal baseband three-ring cooperative tracking method, system and device and a medium, and belongs to the technical field of satellite navigation signal processing, and the method comprises the steps: receiving a digital intermediate frequency BOC modulation satellite navigation signal; establishing a carrier tracking loop, a subcarrier tracking loop and a code tracking loop; performing frequency mixing operation on the digital intermediate frequency BOC modulation satellite navigation signal and a local carrier wave; performing correlation operation on the signal after the frequency mixing operation and a local subcarrier and a local pseudo-random code in sequence; carrying out accumulation processing on a correlation operation result to obtain a correlation accumulation value; respectively calculating error adjustment parameters of the carrier tracking loop, the subcarrier tracking loop and the code tracking loop based on the correlation accumulation values; and when the error adjustment parameters of the carrier tracking ring, the subcarrier tracking ring and the code tracking ring are all within a preset range, outputting navigation data. According to the invention, the problem that a traditional double-ring method cannot fully utilize subcarrier components is solved.

The invention discloses a code tracking method and device, electronic equipment and a computer readable storage medium, code tracking is applied to a code tracking system, and the code tracking system at least comprises one terminal equipment; a Java virtual machine is deployed in the code tracking system; the method comprises the following steps: starting a Java virtual machine; when the Java virtual machine is started, loading a preset agent library locally stored in the terminal equipment and a first code file corresponding to the Java application; running the first code file, and calling a preset agent library to monitor a code execution path of a target source code corresponding to the first code file; outputting path information associated with the code execution path; the path information comprises each execution step recorded according to the execution sequence, and the record of each execution step at least comprises the line number of the executed target source code in the source code file of the Java application. According to the method, tracking of the full-link code execution path with low intrusion, high compatibility and row-level precision can be realized.

The invention discloses a carrier ring auxiliary code delay phase-locked loop tracking method, system and device and a medium, and belongs to the technical field of signal tracking, and the method comprises the steps: obtaining a digital intermediate frequency signal, and constructing a code loop model; executing code tracking through the code loop model to obtain a code phase error measurement value, and determining a relationship between a carrier-to-noise ratio and a noise covariance; a measurement noise covariance matrix model is obtained through combination of a code phase error measurement value and a carrier-to-noise ratio dynamic state and is used for first adjustment of a filter. According to the invention, a measurement noise covariance matrix is dynamically adjusted based on real-time carrier-to-noise ratio estimation, so that the filter can accurately adapt to signal quality change, fully trust an accurate measurement value when a signal is strong, greatly reduce tracking jitter, achieve higher pseudo-range measurement precision, and automatically reduce dependence on the measurement value under noise interference when a signal is weak. In turn, the method depends on smooth prior model prediction.

The application belongs to the field of GPS positioning, and relates to a dynamic GPS signal interference influence evaluation method and system, which comprises the following steps: calculating the instantaneous position vectors and velocity vectors of visible satellites, a receiver and an interference source in the Earth-Centered Earth-Fixed coordinate system; obtaining the directional gain of a receiving antenna to multiple visible satellite signals and multiple interference signals respectively; calculating the noise power spectral density, the power of multiple visible satellite signals and the power of multiple interference signals arriving at the radio frequency front end of the receiver; modeling the equivalent carrier-to-noise ratio to obtain the equivalent carrier-to-noise ratio of multiple visible satellites; simulating the influence of the visible satellites on the code tracking loop of the receiver to obtain the pseudorange measurement error of multiple visible satellites; and performing positioning solution through a weighted matrix least square method to obtain the positioning accuracy, so that the interference effect can be accurately, real-timely and quantitatively evaluated.

The invention discloses a code tracking method and system, electronic equipment, a storage medium and a computer program product, and relates to the technical field of artificial intelligence and computers. The method comprises the following steps: in response to a writing event of a target type code in an integrated development environment, obtaining code change data corresponding to the writing event; in response to a version submission operation executed for a to-be-submitted code corresponding to the target type code, verifying the code change data based on the to-be-submitted code and a reference version code corresponding to the target type code to obtain submission statistical information, the submission statistical information is used for representing an effective code change line provided by the target type code relative to the reference version code; and performing associative storage on the submission statistical information and a code version identifier corresponding to the version submission operation to obtain a code tracking record. According to the method and the device, the technical problems of low code tracking efficiency and poor real-time performance and accuracy in related technologies are solved.

The application relates to a multi-path signal detection device and method, which comprises a radio frequency processing module, a carrier tracking loop, a code tracking loop and a multi-path detector connected in sequence. The radio frequency processing module receives satellite signals and sends the signals to the carrier tracking loop after radio frequency processing. The carrier tracking loop sends the received signals to the code tracking loop after stripping the carrier. The code tracking loop outputs the received signals to the multi-path detector after stripping the pseudo code. The multi-path detector is used for detecting whether the received satellite signals are multi-path signals. The application can effectively detect multi-path signals.

The invention discloses an unmanned aerial vehicle positioning method and system based on a communication and sensing collaborative fusion technology, and the method comprises the steps: 1, building an unmanned aerial vehicle communication and sensing integrated system platform which comprises an integrated transmitter and an integrated receiver; step 2, in the integrated transmitter, carrying out communication and inductance integrated design on a radar waveform to form a radar wave beam; meanwhile, in the integrated transmitter, a communication symbol is generated, and a communication beam is formed; step 3, fusing the formed radar beam and communication beam to form an integrated waveform, and performing radio frequency modulation on the integrated waveform; 4, the integrated receiver carries out equipment demodulation on the integrated waveform, and after filtering, target detection and channel estimation are carried out on the unmanned aerial vehicle; and 5, according to a target detection result and a channel estimation result, performing optimization processing on the trajectory of the unmanned aerial vehicle. According to the method, an integrated waveform generation model is provided, and code tracking precision, compatibility and the like are evaluated. And earnings brought by communication and sensing integration are improved.

The present application relates to a kind of GNSS co-star dual-frequency signal baseband carrier / codes joint tracking processing method and receiver, belong to satellite navigation positioning technical field, method includes: using dual-frequency joint carrier tracking loop to carry out the closed loop tracking of dual-frequency carrier;Dual-frequency joint carrier tracking loop, jointly use the carrier phase discrimination result of the carrier tracking loop of each frequency point of dual-frequency point, respectively predict out the carrier loop parameter of control each frequency point to carry out recurring carrier;Using dual-frequency joint code tracking loop to carry out the closed loop tracking of dual-frequency signal code loop;Dual-frequency joint code tracking loop, jointly use the code ring discrimination result of the code tracking loop of each frequency point of dual-frequency point, and combine the carrier phase discrimination result in dual-frequency joint carrier tracking loop, respectively predict out the code loop parameter of control each frequency point code phase control;Through the closed loop tracking of dual-frequency joint carrier tracking loop and dual-frequency joint code tracking loop, realize the tracking of GNSS co-star dual-frequency signal.The present application improves the sensitivity of dual-frequency signal tracking.

The invention relates to a method for monitoring a code-tracking loop (1) of a GNSS signal receiver (11) in order to detect erroneous jumps of the code-tracking loop from a main peak (8) to a side peak (9), comprising the following steps: a) tracking a first received GNSS signal (2) from a GNSS satellite on a first frequency band and determining a first signal increment of the first received GNSS signal (2); b) tracking a second received GNSS signal (2) from the same GNSS satellite on a second frequency band and determining a second signal increment of the second received GNSS signal (2); and c) comparing the first signal increment and the second signal increment in order to determine the jump from a main peak (8) to a side peak (9) if unexpected deviations between the first signal increment and the second signal increment have been ascertained.

The invention discloses a spread spectrum signal code tracking system adaptive to a frequency hopping system, and relates to the field of communication. The device comprises a digital frequency synthesis unit, a frequency control word calculation unit, a digital resampling unit, a matched filtering unit and a tracking error calculation unit. The dehopped spread spectrum signal is re-sampled to twice sampling through a digital re-sampling unit, then the signal is output to a matched filtering unit, the matched and filtered spread spectrum signal is subjected to code tracking error calculation through a tracking error calculation unit, and then the tracking error calculation unit outputs the tracking error to a frequency control word unit; the frequency control word unit calculates frequency control words of the resampling unit and the digital frequency synthesis unit in real time according to tracking errors, and code tracking of spread spectrum signals is achieved by adjusting the phase of the digital frequency synthesis unit and a digital resampling module. According to the invention, spread spectrum signal code tracking of the frequency hopping system can be realized. The technology is suitable for a fast frequency hopping and hopping spread spectrum combined satellite communication system.

The invention belongs to the technical field of global satellite navigation system signal processing, and particularly relates to a code tracking method and system for joint multi-frequency signals, and the method comprises the steps: carrying out the filtering, amplification, coherent integration and code discrimination of received signals of a plurality of frequency points, the digital intermediate frequency signals corresponding to the received signals and the code delay error estimation values thereof can be accurately obtained; the target weight of each code delay error estimation value is determined through the acquired variance of the target estimation error value of each digital intermediate frequency signal, and then weighted fusion can be performed on each code delay error estimation value based on each target weight to obtain common-mode code phase output and differential-mode code phase output with higher precision. Therefore, the target code rate correction amount of the inter-frequency deviation corresponding to each received signal can be accurately obtained, and each inter-frequency deviation is dynamically corrected, so that the code tracking precision of the joint multi-frequency signal is effectively improved.

The application relates to the field of space laser communication, in particular to a face array APD multi-spot overlapping state simultaneous identification method and system based on code division multiple access, which comprises the following steps: three slave optical terminals respectively emit three beacon light beams to a master optical terminal; the three beacon light beams pass through a converging lens and converge to a 5*5 face array APD detector photosensitive surface to generate 25 APD pixel photoelectric current signals; the 25 APD pixel photoelectric current signals are input to a signal conditioning circuit, and a digital signal corresponding to each APD pixel photoelectric current signal is output; the digital signals are all input to a preprocessing unit to obtain a summary signal; the preprocessing unit inputs the summary signal to a code tracking loop to obtain an output signal; integrated processing is conducted on the output signal output by the code tracking loop and the digital signal output by the signal conditioning circuit to obtain an integrated processing result; and a centroid algorithm is used to solve the spot center position of the integrated processing result. The number of code tracking loops, the complexity and the scale of the circuit system are reduced.

The present disclosure provides a method and an apparatus for tracking a direct sequence spread spectrum (DSSS) signal in a fractional Fourier domain (FRFD). The method includes the steps of: receiving an intermediate frequency (IF) DSSS signal; removing a Doppler frequency component by mixing with local sine and cosine waveforms generated by a carrier numerically controlled oscillator (NCO) to obtain in-phase (I) and quadra-phase (Q) carrier-stripped samples; performing code tracking and integration / dumping operations in the FRFD using chirp-signal modulation; discriminating carrier phase errors via I and Q prompt correlations and code chip errors via I and Q early / late correlations through carrier and code discriminators; filtering the discriminated errors through low-pass loop filters; and using filter outputs to generate carrier and code measurements while adjusting carrier and code NCOs for real-time tracking in subsequent epochs.

The invention discloses a satellite navigation signal deception detection method, which comprises the following steps of: acquiring a satellite signal, outputting lead, instant and lag correlation values corresponding to a same-direction signal and an orthogonal signal of the satellite signal on the basis of a multi-correlator of a carrier loop and a code tracking loop; the correlation values which are output by the same-direction channel and the orthogonal channel and change along with the time are used for calculation to obtain M1 measurement and M2 measurement which change along with the time; and obtaining measurement thresholds of the M1 measurement and the M2 measurement based on a preset false alarm rate, and determining whether cheating exists based on the measurement thresholds. According to the method, two measurement criteria are designed, so that the deception detection performance of the system is further improved; meanwhile, the complexity and the hardware cost of the algorithm are lower than those of a traditional detection method assisted by external information.

The invention discloses an open source component risk assessment method and device and electronic equipment, and relates to the technical field of software development.The method comprises the steps that after a target project service is started, dynamic call chain data of a vulnerability API of an open source component is collected, and the dynamic call chain data at least comprises call stack information and call parameters; a static code analysis tool and a dynamic operation identification tool are adopted to analyze the service source code calling the open source component, and a service scene label is generated; on the basis of the dynamic call chain data, the service scene label and the vulnerability basic information, the risk level of the open source component is judged through a multi-dimensional weight model; and judging the risk level of the open source component according to the calculated risk level, and generating a risk assessment result and a repair suggestion. The technical problem that the false alarm rate is high due to the fact that whether the vulnerability API is actually called in the project cannot be judged when the risk of calling the open source component is analyzed by adopting a static code tracking tool in the related technology is solved.

The invention relates to a multi-discriminator cooperative anti-interference pseudo code tracking method based on fuzzy control, and belongs to the technical field of satellite navigation and spaceflight measurement and control. The method specifically comprises the following steps: step 1, carrying out de-spreading and integral clearing processing on a received signal; step 2, using two bilateral slope anti-interference discriminator groups with different correlator distances to carry out pseudo code phase discrimination on the signal output in the step 1 to obtain a phase error estimation value; step 3, evaluating the dynamic size of the current carrier and the multi-access interference intensity; step 4, performing adaptive weighted fusion on the identification result based on fuzzy logic control; and 5, performing filtering processing by using the final identification result, and generating a pseudo code sequence.

Various embodiments of the teachings herein include industrial network-based codeless tracking analytics methods for industrial software. Some methods include: identifying an industrial intranet topology through detection, and generating a configuration map of the industrial field according to the topology and / or an application program running list of the software; injecting a sidecar agent for codeless runtime tracking to an edge device of a target field device in the industrial field according to the configuration map, and performing data synchronization for the edge device and the sidecar agent corresponding to the edge device, at least one tracking point existing between the target edge device and the sidecar agent corresponding to the target edge device, and the target edge device running at least one application program of the industrial software; and obtaining analysis data from the tracking point when the target edge device runs an application program therein, to analyze the industrial software.

The invention discloses an interactive visualization method oriented to algorithm understanding. The interactive visualization method comprises the following steps: step 1, developing an algorithm visualization engine; building a component and an operator based on the finite automaton, and defining a component expression; step 2, constructing a knowledge graph; corpora are extracted from literatures, and original data are obtained through OCR recognition and manual error correction in combination with intelligent education open knowledge data; step 3, constructing an algorithm agent module; extracting problem entities through an AC automaton, filtering nested entities by using a set coverage algorithm, and matching knowledge graph triples; step 4, system integration; the front end realizes an interactive interface and the rear end business logic and stores data; the invention relates to the technical field of computer science. According to the interactive visualization method oriented to algorithm understanding, dynamic demonstration of an algorithm execution process is realized based on a visualization engine of a finite automaton, interactive functions such as zooming, dragging, code tracking and dynamic data input are supported, and an abstract algorithm is converted into a visual animation.

The invention relates to a code tracking method and system.The method comprises the steps that a source code file and a code submission record are obtained, the code submission record comprises code submission information and code change content, and the code change content and the source code file have an incidence relation; constructing a corresponding first syntax tree structure for each source code file, wherein the first syntax tree structure comprises a plurality of syntax sub-trees; splitting the code change contents according to the association relationship, constructing a second syntax tree structure for each code change content, and labeling code submission information; and performing similarity matching on the plurality of syntax sub-trees in the second syntax tree structure and the first syntax tree structure, and merging the second syntax tree structure into the first syntax tree structure according to a matching result. The system is used for executing the corresponding method steps. And by using the constructed code tracking syntax tree, rapid tracing of code defects is realized, the code quality risk in a project is further reduced, and the software quality is improved.

The invention relates to the technical field of spread spectrum communication, in particular to a capturing and tracking method, which comprises the following steps of: receiving a baseband signal, sampling the received baseband signal to obtain a sampling point, carrying out multiphase filtering operation on the sampling point, and utilizing a multiphase filtering technology to obtain a capturing and tracking signal; the method comprises the following steps of: selecting a path of filter coefficient of a given phase to filter a sampling point so as to recover a high-sampling-rate waveform, then carrying out subsequent code capturing operation and code tracking operation on the recovered waveform, and improving the sampling rate to be N times of the original by carrying out multiphase filtering operation on the sampling point, so that the precision of a subsequent capturing and tracking algorithm is increased; as only one path of phase data needs to be processed, although the time delay of the capturing and tracking algorithm is slightly increased, compared with a traditional capturing and tracking algorithm, the method has the advantages that the speed of processing a clock does not need to be increased, parallel filtering processing does not need to be carried out, and the complexity is low.

The application discloses a two-dimensional code full life cycle tracking management system based on dynamic encryption, relates to the technical field of two-dimensional code tracking management, and achieves dynamic generation and security binding of two-dimensional code content by constructing a target object life cycle state sequence diagram, dynamically generating a two-dimensional code coding index based on a current state, a device environment and time factors, and combining a multi-factor asymmetric encryption mode; meanwhile, legality verification of two-dimensional code access behavior is carried out through path consistency verification and state chain continuity judgment, and two-dimensional code effectiveness is judged in combination with an environment deviation detection mechanism; compared with the prior art, the application can effectively prevent two-dimensional code forgery, replay and unauthorized access, improve the uniqueness, verifiability and security of two-dimensional codes in the full life cycle, and is suitable for high-security product tracking, anti-fake authentication and multi-stage identity recognition scenes.

The invention relates to the technical field of satellite navigation receiver signal processing and anti-multipath, and specifically discloses a loop adaptive GNSS anti-multipath method based on multi-correlator output. The method comprises the following steps: in a baseband tracking loop, taking a code tracking punctual moment as a center, arranging a plurality of pairs of symmetric code delay positions on two sides of the code tracking punctual moment, and correlating a received signal with a local pseudo code to obtain a plurality of paths of symmetric correlation outputs and punctual correlation outputs; and constructing a local asymmetry index based on each symmetric correlation amplitude, forming a normalized multipath characteristic index M according to a weighted norm, and optionally combining information such as a correlation function slope difference, a main lobe / side lobe energy ratio and the like to generate a comprehensive multipath characteristic index for representing the multipath interference degree of the current signal. And the receiver adaptively selects a code tracking loop working mode according to the relationship between the multipath characteristic index and a preset threshold value, and performs joint adjustment on the Early-Lat correlator interval and the loop bandwidth.

The invention relates to the technical field of information security, and provides a taint data tracking method and device based on byte code instrumentation, and the method comprises the steps: respectively building corresponding shadow storage regions for a stack frame and a stack which run in a virtual machine; inserting a data operation monitoring code into the key byte code instruction of the virtual machine; in the program execution process, circulation of data between stack frames and heaps is tracked based on data operation monitoring codes, and stain marks are synchronously updated in the shadow storage area. According to the method and the device provided by the invention, the corresponding shadow storage areas are respectively established for the stack frame and the heap, so that fine-grained management of the stack frame and the heap object is realized, and accurate tracking of the whole process of data from input to output is ensured; a data operation monitoring code is inserted into the key byte code instruction, and the data flow direction in the whole program execution process can be captured; the flow direction of the data input by the user is accurately tracked, the potential safety risk is identified, and the false report and the missing report of risk research and judgment are reduced.

The invention discloses a code error positioning system and method based on a large language model. A pre-processing module of the system obtains tracking information and difference information during code operation through a code data set, so that a code tracking file and an error positioning file are constructed; the error positioning learning module is used for training the large language model according to the code tracking file and the error positioning file and then obtaining an error positioner for identifying and positioning code errors; and the error positioning generation module is used for processing to-be-positioned code data and a code tracking file by using an error positioner to generate a file with error code positioning of the current code data so as to realize code error positioning. According to the method, the code error positioning is simplified and determined by combining the code tracking file and the diff-like file, and the error positioner with the capability of identifying and positioning the error during operation is trained, so that the code error positioning correctness and description accuracy can be effectively improved, the time cost of manual debugging is reduced, and the development efficiency is improved.

The application discloses a satellite baseband signal tracking method, and steps of the method comprise the following steps: step S1, establishing a joint state space equation suitable for high dynamic carrier tracking and code tracking; step S2, establishing an observation equation, taking the output δt k of a discriminator and the output δφ k of a phase discriminator as observation quantities; step S3, based on the state equation and the observation equation, adopting a Kalman filter to perform optimal estimation on a state; step S4, using optimal estimation values of carrier phase and Doppler frequency shift, introducing inertial auxiliary information to calculate line-of-sight acceleration, and calculating a carrier NCO control quantity; and step S5, calculating a code NCO control quantity. The application has the advantages of simple principle, wide application range, high tracking precision and the like.

The application discloses a Beidou navigation hard loop tracking processing method and system, which comprises a DLL code tracking loop and a PLL carrier tracking loop; a channel correlation value output by a channel correlator is read, a loop state stored in a RAM is read, and a current loop state is acquired; the hard loop is configured according to the loop state and different signal system characteristics, a code frequency control word is obtained, the calculated carrier frequency control word and the code frequency control word are set to a tracking channel, and then the loop state is switched according to a current loop completion condition. Therefore, the high-frequency loop tracking software processing bottleneck problem is solved, the low-frequency loop tracking processing is compatible, and the efficiency of loop processing is improved.

The invention provides a wireless data link positioning method based on binary offset carrier modulation, which adopts a synchronous signal based on BOC (Binary Offset Carrier) modulation and utilizes the characteristics of spectrum splitting, sharp autocorrelation peak, good multipath performance and the like of BOC modulation. Relative positioning with high precision and robustness can be realized in complex electromagnetic environments such as GNSS denial and interference shielding based on the communication capability of the data link. Tracking is carried out on the basis of successful capturing, pseudo code phase information provided by capturing and a rough estimation value of carrier Doppler are utilized to carry out fine tracking on pseudo codes and carriers, and then the de-spreading and demodulation processes of positioning signals are completed; compared with the prior art, the phase discrimination result is more accurate, code tracking has higher precision, meanwhile, due to the fact that more energy of the BOC modulation signal is concentrated on the two sides of the frequency band, the effective bandwidth is increased, the anti-noise performance and the anti-multipath performance of the signal are improved, and the precision of a data link communication signal in pseudo code ranging and positioning will be improved.

The invention relates to a coal quality test management system. The coal quality test management system comprises an upper management and control platform, and a task scheduling module, a coding management module, a data acquisition and analysis module, an abnormal response module and an environment and equipment monitoring module which are connected with the upper management and control platform, the task scheduling module is used for dynamically scheduling the circulation sequence of the sample bottles among the industrial analyzer, the calorific value instrument, the sulfur detector and the element analyzer; the code management module is used for identifying a sample code and generating a unique internal turnover code; the data acquisition and analysis module is used for acquiring equipment output data and operation parameters in real time and performing automatic comparison and analysis according to a standard range judgment rule; according to the system, five core functions of intelligent task scheduling, code tracking, automatic data analysis, abnormal closed-loop response and environmental equipment monitoring are deeply integrated for the first time, and the problems of flow splitting, response lag, operation and maintenance blind areas and the like in a traditional system are solved. By constructing a full-process collaborative scheduling engine, closed-loop operation without human intervention is realized.

The invention belongs to the field of GPS positioning, and relates to a dynamic GPS signal interference influence assessment method and system, and the method comprises the steps: calculating instantaneous position vectors and velocity vectors of a visible satellite, a receiver and an interference source under an earth-centered earth-fixed coordinate system; obtaining direction gains of the receiving antenna to the multiple paths of visible satellite signals and the multiple paths of interference signals; calculating the power spectrum density of noise reaching the radio frequency front end of the receiver, the power of multiple paths of visible satellite signals and the power of multiple paths of interference signals; carrying out equivalent carrier-to-noise ratio modeling to obtain the equivalent carrier-to-noise ratios of a plurality of visible satellites; simulating the influence of the visible satellites on a receiver code tracking loop to obtain pseudo-range measurement errors of the plurality of visible satellites; positioning calculation is carried out through a weighted matrix least square method, and positioning precision is obtained; therefore, accurate, real-time and quantitative evaluation of the interference effect is realized.