166 results about "Pseudo-code" patented technology

The invention relates to a signal equipment fault diagnosis rule automatic generation method, system and equipment, and the method comprises the steps: a demand cleaning processing process: carrying out the semantic analysis of an original fault diagnosis demand of signal equipment, and generating a structured output containing a demand pseudo code and a dependency graph based on a recognition result of the demand; the demand searching process is used for constructing a demand vector and a knowledge graph; performing similarity search on the vectorized query demand to obtain similar demand nodes for a user to select a root demand, and performing deep search in the knowledge graph based on the root demand to generate a fault tree structure and fault tree data; and an intelligent rule automatic generation process: generating prompt words based on the fault tree data construction rule, and generating a signal equipment fault diagnosis rule code by using a large language model. Compared with the prior art, the method has the advantages that the signal equipment fault diagnosis rule is automatically generated, and the development efficiency is improved.

The invention discloses a code generation and restoration method and device based on multi-round feedback of a large language model, and the method comprises the following steps: 1, converting problem description into a structured tetrad (target, input, output and constraint) through a two-stage task demand deconstruction mechanism, and generating a pseudo-code frame according to the structured tetrad; 2, generating a plurality of candidate code schemes in parallel based on different implementation strategies; 3, selecting an optimal code implementation scheme through multi-dimensional evaluation; 4, generating an extended test case through boundary condition analysis and public test reasoning, and expanding a verification range; 5, classifying error types in combination with static analysis and dynamic execution information, and applying a special repair strategy; 6, providing detailed repair reasons and ideas by an interpretable repair mechanism; and 7, establishing a multi-round feedback repair verification iteration mechanism composed of testing, analysis, repair and verification. According to the method, the performance of an existing large language model in processing a complex programming task is effectively improved.

The invention discloses a query condition analysis method and device and a medium, and the method comprises the steps: receiving a natural language query statement input by a user for a human resource management system, and extracting a core semantic unit in the natural language query statement; based on a preset knowledge base, mapping the core semantic unit into a semantic structure corresponding to an Elasticsearch database to generate a corresponding key vector diagram; based on a preset pseudo code normal form, generating a pseudo code according to the key vector diagram; wherein the pseudo code comprises a query node set and a logical relationship between query nodes; and performing code verification on the pseudo-code, and converting the pseudo-code into a DSL query statement in an Elasticsearch database under the condition that the pseudo-code passes the code verification, so as to realize semantic analysis on the natural language query statement through the DSL query statement.

The invention discloses an auxiliary programming teaching method and system based on a large model. The method comprises the steps that a programming code test data set is constructed, the large model is selected, and a cue word template is constructed; collecting a user code error correction problem and an error code, generating an intelligent review, correct code or pseudo code cue word, inputting the intelligent review cue word into the first large model to obtain intelligent review information, and inputting the correct code or pseudo code cue word into the second large model to obtain a correct code or pseudo code; generating a detailed guidance cue word, and inputting the first large model to obtain detailed guidance information; generating a key dial cue word, and inputting the key dial cue word into the first large model to obtain key dial information; and generating knowledge point cues, inputting the knowledge point cues into the first large model to obtain knowledge point information, and sequentially pushing intelligent examination questions, key dials, detailed guidance, correct codes or pseudo codes and knowledge points to the user according to user cognitive logic. The invention relates to the field of artificial intelligence, a large model can be applied to digital programming teaching, and the accuracy of the model is improved.

The invention relates to a low-orbit satellite short burst signal high-precision capturing method and device, equipment and a medium. The method comprises the following steps: sequentially carrying out digital down-conversion and L-time signal pseudo code rate down-sampling on a low earth orbit satellite short burst signal sequence sampled by an ADC (Analog to Digital Converter) to obtain a down-sampled signal sequence; performing pre-accumulation processing on the down-sampling signals of every adjacent L points in the down-sampling signal sequence, and performing coarse capture on the pre-accumulated signal sequence by adopting a PMF-FFT algorithm to obtain a coarse pseudo code phase and a coarse frequency offset value; and performing serial code phase search on the down-sampling signal sequence based on the coarse pseudo code phase and the coarse frequency offset value, optimizing to obtain a fine pseudo code phase, and optimizing the estimation precision of the coarse frequency offset value according to the fine pseudo code phase and a frequency offset estimation algorithm based on a phase relation to obtain a fine frequency offset value. By adopting the method, the acquisition precision and speed of the short burst signal of the low-orbit satellite can be improved.

The invention relates to a GNSS pseudo code blind estimation method and device, equipment and a storage medium. The method comprises the following steps: obtaining an I / Q branch pseudo code estimation value of each sampling point through pseudo code symbol judgment; for any branch, counting pseudo code estimation values of all sampling points in each chip of the current branch, and obtaining a pseudo code initial estimation value of each chip of the current branch through discrete integral operation; constructing two types of local code sequences corresponding to any chip through positive and negative polarity hypothesis, and reconstructing to generate two types of local navigation signals; respectively multiplying and accumulating the received signal of each sampling point and two types of local navigation signals of any chip of the current branch point by point to obtain two types of signal correlation values of any chip, and carrying out pseudo code symbol correction judgment on any chip according to the difference of the two types of signal correlation values; and obtaining the corrected pseudo code estimated value of any chip of the current branch. The method can reduce the bit error rate and improve the accuracy of pseudo code estimation.

The invention particularly relates to a method for quickly capturing high-dynamic and low-carrier-to-noise-ratio signals, which comprises the following steps of: preprocessing input digital intermediate-frequency signals, performing correlation operation on stored local pseudo code data and baseband data after down-conversion, and accumulating correlation results of which the length is a set value; if the local code phase is aligned with the pseudo code phase modulated by the baseband data, a peak value is obtained through FFT, the index of the peak value indicates the Doppler frequency, and the number of FFT calculation times indicates the code phase; calculating a module value based on a real part and an imaginary part output by the FFT; judging whether capturing succeeds or not based on the maximum module value, and obtaining the Doppler frequency of rough capturing if capturing succeeds; and refining the roughly captured Doppler frequency to obtain a refined Doppler frequency. According to the method, the Doppler frequency and the code phase are accurately searched in a short time, and the method is suitable for capturing high-dynamic weak signals.

The present invention discloses a positioning method based on collaborative fusion of factor graph and filtering, specifically as follows: Step 1: Adopt a GNSS multi-channel parallel processing mode to generate local initial local carrier signals and local pseudo-codes; perform orthogonal separation on the local carrier signals to generate orthogonal signals, and mix the orthogonal signals with intermediate frequency signals respectively to obtain orthogonal signals after carrier stripping; Step 2: Perform pseudo-code correlation operations on the orthogonal signals after carrier stripping with the local pseudo-codes respectively to obtain in-phase and quadrature branch leading, prompt, and lag correlation values, integrate and sum each correlation value and transmit the results to a pre-filter respectively; Step 3: Based on the output results of the pre-filter, use an FGO-EKF filter to calculate the position and velocity of the carrier at the current moment; Step 4: According to the position and velocity calculated in Step 3, update the local carrier signals and local pseudo-codes at the current moment; then turn to Step 1.

The invention provides a configuration method and a related device, the method is applied to electronic equipment, and the method comprises the steps that the electronic equipment receives a first satellite signal of the same satellite by using n signal channels, for example, the method comprises the steps of capturing and tracking the first satellite signal by using the n signal channels, wherein each signal channel comprises m correlators, the distance between any two adjacent correlators is equal, and n and m are integers greater than 1; the electronic equipment obtains first code loop adjustment information and observed quantity of the first satellite signal according to the output values of the correlators of the n signal channels, the first code loop adjustment information is used for adjusting pseudo code phases of the n signal channels, and the observed quantity of the first satellite signal is used for obtaining position information of the electronic equipment. According to the invention, the output of the original correlator can be spliced into the required data, so that the configuration of the correlator can be flexibly adjusted on the premise of not changing the hardware structure of the electronic equipment.

The invention discloses a porous rock multiphase fluid lattice Boltzmann simulation method based on GPU acceleration, and belongs to the technical field of computational fluid mechanics, a D3019 speed discrete model is utilized to identify porous rock to obtain a digital core model, a speed direction and a weight coefficient are defined, a distribution function is defined by means of an LBM method, and a multi-phase fluid lattice Boltzmann simulation model is obtained. Calculating a macroscopic physical quantity by utilizing a relation between a distribution function and a velocity moment, respectively describing a gas-liquid interface and a complex boundary of the porous rock by virtue of a scalar tracer function and a step function, and constructing a physical model; constructing an equilibrium state distribution function, performing LB equation calculation by adopting a forming schema equation under an external force, constructing a pseudo-potential multiphase model by virtue of a Shang-Chen potential energy formula, and processing the solid-liquid boundary of the porous rock by using a semi-rebound format; and carrying out a numerical solution pseudo code process based on the lattice Boltzmann method. According to the method, the characteristics of multithreading, memory sharing and the like of GPU hardware are fully utilized under the LBM framework, and the steps of the core algorithm are highly parallelized, so that high-performance calculation is realized.

The invention particularly relates to a method for converting pseudo code capture into tracking phase compensation under clock frequency offset. The method comprises the steps of band-pass sampling and digital down-conversion, local pseudo code sequence generation, twice pseudo code capture and phase compensation. Selecting a sampling frequency and processing a signal through a band-pass sampling theorem, and generating a local pseudo code based on a Gold code; a PMF-FFT method of a mobile pseudo code is adopted to complete first-time pseudo code capture, a multiplexing capture module executes second-time full-range capture, and pseudo code phase offset is accurately calculated; and finally, adjusting the local pseudo code phase through the total phase compensation value, so that the phase difference between the input signal and the local pseudo code is controlled within a half chip. According to the method, hardware cost does not need to be increased, the problem of inaccurate phase compensation under clock frequency offset, large frequency offset and low carrier-to-noise ratio scenes is effectively solved, it is guaranteed that pseudo code capture is smoothly converted into tracking, and the tracking reliability of a receiver is improved.

The invention provides a non-cooperative measurement and control signal carrier recovery method and device based on pseudo code jump edge detection, and belongs to the technical field of radar signal processing, and the specific process is as follows: setting the stepping amount of a local timing synchronization pulse accumulator, and when the accumulated value of the timing synchronization pulse accumulator is greater than a set threshold value, stopping the stepping amount of the local timing synchronization pulse accumulator; the accumulator outputs a timing synchronization pulse signal; controlling a sliding accumulator by using a synchronization pulse signal to perform sliding accumulation on a constellation module value # imgabs2 # calculated by the # imgabs0 # baseband signal and the # imgabs1 # baseband signal, and further obtaining a synchronization pulse capture offset for coarse synchronization of a timing synchronization pulse; obtaining a correlation value of a # imgabs3 path baseband signal and a # imgabs4 path baseband signal under the control of a timing synchronization pulse after coarse synchronization, obtaining a timing error by using a timing error discriminator, and further obtaining a stepping amount of a synchronization pulse accumulator; and realizing carrier recovery by using the stepping amount of the synchronization pulse accumulator.

The invention discloses a long function-oriented software supply chain vulnerability detection method, which comprises the following steps of: eliminating information irrelevant to vulnerabilities by applying a designed statement-level difference extraction algorithm on a pseudo-code level; secondly, utilizing a designed graph slicing algorithm to map pseudo code slices to a code attribute graph, identifying and positioning vulnerability-related statements and variable nodes thereof, tracing nodes which are semantically adjacent to variable nodes which are strongly correlated with vulnerabilities by tracking edges in an abstract syntax tree, and constructing a difference graph after slicing; afterwards, the difference graph is input into a graph matching neural network for training, so that the model can accurately judge the similarity of the difference sub-graph pairs between the vulnerabilities and the vulnerabilities after the vulnerabilities are repaired. Finally, whether the vulnerability exists or not is judged by comparing the distance between the to-be-detected function and the image obtained after the reference sample is sliced, the scale of the image is reduced, relevant information of the vulnerability is highlighted, and the time and hardware cost of model training are reduced while high detection accuracy is guaranteed.

The invention relates to the field of computers, and provides a software security detection method and system based on code lines, and the method comprises the steps: obtaining a binary file of to-be-detected software, and carrying out the preprocessing of the binary file, and obtaining a corresponding pseudo code; performing multi-level code line generation on each function in the pseudo code to obtain a code line vector of each function; based on the code line vector of each function, performing similarity retrieval in a preset code line library, and performing risk assessment and attribution analysis on the binary file of the to-be-detected software according to a retrieval result; and generating a security detection report of the to-be-detected software based on the evaluation result and the analysis result. According to the method, the binary file of the to-be-detected software is converted into the pseudo code, deep analysis can be performed on the pseudo code, and multi-level code line generation is performed on each function in the pseudo code, so that similarity retrieval can be performed in the preset code line library on the basis of the generated code line vector; therefore, the accuracy, efficiency and comprehensiveness of software security detection are improved.

The invention discloses a variable code rate pseudo code distance measuring device and a distance measuring method, and mainly solves the problem of super-high altitude tracking error height of a fixed code rate pseudo code distance measuring device. Comparing the height values captured twice: if the absolute value of the height difference value captured and solved twice continuously is within a pre-value range, judging that the signal is a normal signal, and outputting an effective height to the outside; if the absolute value of the height difference value obtained through continuous two times of capturing and resolving is within the superaltitude pre-value range, it is judged that the distance measuring equipment conducts internal tracking, and invalid height is output outwards; and if the absolute value of the height difference obtained by two continuous capturing and resolving is in other conditions, judging that the distance measuring equipment performs abnormal tracking, and continuously searching to ensure that the distance measuring equipment outputs normally during super-high-altitude tracking. The method can prevent the false tracking height of the pseudo code ranging equipment, improves the interference suppression capability of the ranging equipment, and can be used for measuring the flight height in aerospace crafts or radar equipment.

The invention belongs to the technical field of computer security, and particularly relates to a multi-level feature fusion binary code similarity detection method and system.The method comprises the steps that two binary files to be detected are obtained, the two binary files to be detected are disassembled respectively, and code representations of the two binary files are obtained; code representations of the two binary files are preprocessed and then input into the trained binary code similarity detection model, and a similarity score is obtained; the binary code similarity detection model comprises a CFG branch, a pseudo code branch, a structural feature extraction module and a feature fusion module; according to the method, characteristics of assembly instructions and pseudo codes are respectively extracted through CFG and pseudo code branches to capture bottom-layer and high-layer information, the similarity between the assembly instructions and the similarity between the pseudo codes are calculated according to the characteristics, and different levels of information are fused by fusing the similarity between the assembly instructions and the similarity between the pseudo codes. And the robustness and the detection precision of binary code similarity detection are improved.

The invention provides a synchronization system for DSSS pseudo code signals. The synchronization system comprises a capturing module, a pseudo code positioning module and a pseudo code tracking module. The synchronization method comprises the following steps: the capture module captures a pseudo code element in a DSSS signal; the pseudo code positioning module is used for preliminarily positioning a first pseudo code element in the first pseudo code signal; and the pseudo code tracking module obtains a synchronization result of the DSSS pseudo code signal. Three frequency spectrum enhancement modules in the pseudo code tracking module carry out frequency spectrum enhancement on detection results of frequency spectrum data after PMF-FFT operation of the three branches, correction of the maximum value of frequency domain module values of the three branches is achieved, and then related gain scallop loss of the maximum value of the frequency domain module values in the pseudo code tracking process is reduced. The synchronization precision is effectively improved; and meanwhile, the acquisition module does not need to participate in an FFT (Fast Fourier Transform) operation unit when acquiring the pseudo code elements in the DSSS signals, so that the delay of pseudo code acquisition is reduced, and the synchronization efficiency is effectively improved.

The invention provides a key node identification method and device in an industrial control system, equipment and a medium. The key node identification method comprises the steps of performing reverse analysis on firmware codes of control equipment to obtain a control logic configuration file; disassembling the control software firmware code to obtain a software disassembling code; performing code labeling, code slicing and code translation on the software disassembly code to obtain a class C pseudo code; performing code analysis on the class C pseudo code to obtain a software structure configuration file; performing file analysis on the control logic configuration file and the software structure configuration file to obtain a service logic relationship between the control equipment and the control software and a service logic relationship between the control equipment and the field equipment; constructing a business logic map based on the business logic relationship between the control equipment and the control software and the business logic relationship between the control equipment and the field equipment; and identifying a key control link in the service logic map, and carrying out key node positioning on the key control link. Therefore, key nodes are effectively positioned.

The application provides a coherent accumulation method and device of a signal, a signal acquisition method and device, and applies to the technical field of communication. The coherent accumulation method of the signal comprises the following steps: reading to-be-accumulated data according to a parallel starting address; wherein the to-be-accumulated data comprises data obtained after a modulation signal is preprocessed and pseudo-code data; performing parallel accumulation and coherent accumulation on the to-be-accumulated data until the number of coherent accumulations reaches a coherent accumulation setting value and a transform domain input count value reaches a transform domain input setting value, so as to obtain a coherent accumulation result; wherein the transform domain input count value is increased by one every time the number of coherent accumulations reaches the coherent accumulation setting value; judging whether the length of the coherent accumulation result reaches a coherent accumulation setting length; and if the length of the coherent accumulation result reaches the coherent accumulation setting length, updating the parallel starting address. In the above scheme, the flexibility of coherent accumulation of the signal can be improved in different scenarios.

The invention provides a method for detecting security risks of firmware and related equipment. The method comprises the following steps: acquiring an in-firmware partition mirror image of first firmware; according to the partition mirror image in the firmware, obtaining files in the partition mirror image, file type information of the files in the partition mirror image and pseudo code files of the files in the partition mirror image; and determining a first type engine matched with the pseudo-code file based on the file type information, and performing security risk detection on the pseudo-code file through the first type engine. According to the method for detecting the security risk of the firmware and the related equipment, source-code-free deep semantic analysis is realized, so that a more accurate security risk detection result can be obtained.

The present invention proposes a synchronization system for DSSS pseudocode signals, which includes a capture module, a pseudocode positioning module, and a pseudocode tracking module; the synchronization method is as follows: the capture module captures the pseudocode symbols in the DSSS signal; the pseudocode positioning module preliminarily locates the first pseudocode symbol in the first pseudocode signal; and the pseudocode tracking module obtains the synchronization result of the DSSS pseudocode signal. The three spectrum enhancement modules in the pseudocode tracking module of the present invention perform spectrum enhancement on the detection results of the spectrum data after the PMF-FFT operation of the three branches, thereby realizing the correction of the maximum frequency domain modulus values ​​of the three branches, thereby reducing the related gain scallop loss of the maximum frequency domain modulus value during the pseudocode tracking process, and effectively improving the synchronization accuracy; at the same time, the capture module does not require the participation of the FFT operation unit when capturing the pseudocode symbols in the DSSS signal, thereby reducing the delay of pseudocode capture and effectively improving the synchronization efficiency.

This invention discloses a method for acquiring spread spectrum signals to eliminate the influence of high-speed data symbols, comprising the following steps: When down-converting the input signal obtained from the ADC sampling receiver, a fixed frequency offset is artificially introduced; a local pseudo-code sequence is correlated with the down-converted signal; the correlated signal is low-pass filtered; the I-path and Q-path of the filtered signal are multiplied, and the result is input to the FFT calculation module; the highest energy spectral line is found in the spectrum output by the FFT module, and the Doppler frequency offset of the input signal is calculated if the energy of this spectral line exceeds a threshold, then pseudo-code locking and carrier locking are performed; it is determined whether pseudo-code locking and carrier locking are completed: if locked, the acquisition process ends; if not locked, the phase of the local pseudo-code sequence is adjusted and the process returns to the down-conversion step. This invention can eliminate the influence of high-speed data symbol flipping on spread spectrum signal acquisition, is applicable to different data rates, and significantly enhances the communication capability of spread spectrum communication systems.

The application discloses a B3I signal simulation method and device, terminal equipment and storage medium, through obtaining ephemeris data, generating pseudo code and extension code, and modulating the same, a real B3I signal can be quickly and accurately generated. In this way, the original signal simulation can be freed from the dependence on hardware equipment, and only ephemeris data provided by a user and satellite messages of a Beidou satellite are needed to generate a corresponding B3I signal. In addition, a Doppler frequency shift is calculated according to the distance between a satellite and the user, and is applied to carrier modulation, so that the B3I signals of various satellites can be more accurately simulated. By comprehensively considering ephemeris data, distance calculation, pseudo code generation, Doppler frequency shift and navigation messages and the like, a real B3I signal with a Doppler effect can be generated, which provides a beneficial tool and data for testing and verification of a B3I signal receiver, so that the research and development efficiency of a navigation satellite signal receiver is improved.

The invention relates to the technical field of signal processing, in particular to a multi-path channel pseudo code sequence estimation method and system based on RAKE receiving and MLSE estimation, and the method comprises the steps: carrying out the signal processing of a received signal under a multi-path channel, obtaining pseudo code period estimation, and carrying out the rough estimation of the time delay and amplitude of each path of the received signal; constructing a multi-path channel receiving signal model based on the time delay and amplitude coarse estimation of each path, so that the multi-path channel receiving signal model performs signal symbol detection and pseudo code estimation by using a self-interference cancellation (SIC) and RAKE receiving detection algorithm; an information symbol and pseudo code sequence joint estimation cost function is set based on a multi-channel receiving signal model, and iterative optimization estimation is carried out on the multi-channel receiving signal model by using maximum likelihood estimation (MLSE) based on the cost function. And taking the pseudo code sequence and the information symbol sequence corresponding to the iteration result with the minimum cost function value during model convergence as final estimation results and outputting the final estimation results. The method can be suitable for signal processing requirements under the conditions of low signal-to-noise ratio and various parameters.

The invention provides a code generation method and device based on a large model, equipment and a storage medium, and relates to the technical field of artificial intelligence, in particular to the technical field of large models and reverse engineering. The specific implementation scheme of the code generation method comprises the following steps: segmenting a pseudo code of a dynamic link library file to obtain a plurality of pseudo code fragments and at least one segmentation position; wherein the pseudo code is obtained by disassembling and reversely analyzing a dynamic link library file; correcting errors in the pseudo code snippets based on the large model, and generating a plurality of code snippets; and according to the at least one segmentation position, combining the plurality of code snippets to generate a target code, the target code is used for analyzing whether the dynamic link library file operated in the target system is safe or not.

The invention discloses a method and system for improving low signal-to-noise ratio direct sequence spread spectrum signal code tracking performance, and the method comprises the steps: generating an I-path bipolar code information source, and obtaining a baseband signal; performing convolution operation with the matched filter coefficient to obtain a matched filtering result; time lag and time lead are respectively carried out according to a specified length, so that a lag branch signal and a lead branch signal are respectively obtained; coherent integration is carried out on the local pseudo code sequence at a PL end, and an envelope value is solved; setting an incoherent accumulation length at a PS end, performing incoherent accumulation operation on the envelope value, and selecting a code phase discrimination mode to obtain a code phase discrimination value; and a phase change value is obtained through the linear filter and a loop filter of the code loop, and the phase change value is used for correcting the NCO of the local pseudo code sequence to realize closed-loop feedback. Code tracking performance is improved, signals can be accurately transmitted in a complex interference environment, error codes are reduced, inter-symbol crosstalk is effectively reduced, signal decoding accuracy is improved, and communication quality is guaranteed.

The present application relates to a GNSS pseudocode blind estimation method, apparatus, device, and storage medium. The method comprises: obtaining the pseudocode estimation value of the I / Q branch of each sampling point through pseudocode symbol judgment; for any branch, counting the pseudocode estimation values ​​of all sampling points in each code chip of the current branch, and obtaining the initial pseudocode estimation value of each code chip of the current branch through discrete integral operation; constructing two types of local code sequences corresponding to any code chip through positive and negative polarity assumptions and reconstructing and generating two types of local navigation signals; multiplying the received signal of each sampling point with the two types of local navigation signals of any code chip of the current branch point by point and accumulating them to obtain the two types of signal correlation values ​​of any code chip, and performing pseudocode symbol correction judgment on any code chip based on the difference between the two types of signal correlation values ​​to obtain the corrected pseudocode estimation value of any code chip of the current branch. This method can reduce the bit error rate and improve the accuracy of pseudocode estimation.

The invention discloses a high-spectral-efficiency and high-speed FTN (Fourier Transform Network) transmission method based on pseudo code auxiliary carrier synchronization, which belongs to the field of high-frequency wireless communication, and comprises the following steps: a transmitting end composites a low-speed pseudo code pilot signal into a high-speed FTN signal by adopting a frequency division multiplexing mode to obtain a composite signal and outputs the composite signal; a receiving end performs down-conversion on the received composite signal, and the composite signal is separated by a filter to obtain a low-speed pseudo code pilot frequency sequence and a high-speed FTN sequence; carrying out carrier frequency offset estimation based on the low-speed pseudo code pilot frequency sequence to obtain a frequency offset estimation value; performing frequency offset compensation on a receiving end carrier by adopting the frequency offset estimation value to obtain a compensated high-speed FTN sequence; and carrying out symbol estimation on the compensated high-speed FTN sequence by adopting a forward backtracking continuous symbol sequence detection algorithm to obtain a received signal. According to the invention, the receiving sensitivity and the system robustness can be ensured while high-spectrum-efficiency transmission is realized.

The present invention relates to a capture-to-tracking control method applicable to weak satellite navigation signals. After each successful capture and before switching to closed-loop tracking, the following steps are executed: S1. Perform short-time coherent integration with an integration duration of T / 2 and store the short-time coherent integration result, where T is the pseudo-code period of the satellite navigation signal; S2. Perform cross-product and dot-product operations to obtain the cross-product C for a single pseudo-code period and the dot-product D for a single pseudo-code period; S3. Perform non-coherent accumulation on the cross-product C for a single pseudo-code period and the dot-product D for a single pseudo-code period to obtain the cross-product non-coherent accumulation value and the dot-product non-coherent accumulation value; S4. Calculate the frequency discrimination error Δf k ; S6. Use the estimated frequency difference Δf k to correct the Doppler value of the satellite signal provided in the capture stage, obtain the initial carrier offset value for closed-loop tracking, and configure the local carrier frequency of the tracking channel accordingly; S7. Configure the tracking channel to output the coherent integration result once per pseudo-code period, end the above capture-to-tracking open-loop estimation control process, and start the closed-loop tracking process.

The present invention provides an advertising strategy code generation method, an advertising delivery method and a device, which pre-sets a code template and a code generator for the strategy type of each advertising strategy, and generates pseudocode of the advertising strategy by writing the strategy parameters into the code template of the corresponding strategy type when the strategy type and strategy parameters of the advertising strategy are obtained, and automatically converts the pseudocode of the advertising strategy into engineering code by calling the code generator corresponding to the strategy type of the advertising strategy. The entire code generation process is completed automatically without manual participation, which effectively shortens the code development time, improves the generation efficiency of the advertising strategy code, effectively reduces the coupling between the code and the strategy, improves the maintainability of the code, and reduces the bug rate.