10 results about "Pseudo-code" patented technology

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.

A kind of mathematical formula parsing and code generation method based on abstract syntax tree, for the pseudo code of input file description control algorithm in the process of satellite-borne software development coding, with syntax tree structure as intermediate carrier, carries out independent identification, analysis, code generation, through the identification and analysis of the logic of control algorithm of mixed LaTeX syntax and C language syntax, code identification and processing are carried out with the inconsistent situation of C language function call with C language function call, which is represented by matrix operation, and the operation result is passed into the operation function in the form of pointer.

The application provides a pairing method and device for non-fixed additional pseudo codes, wherein the method comprises the following steps: setting pairing indexes, the first index being the aligned cross-correlation value absolute value, and the second index being the absolute value of the difference between the leading and lagging correlation values; determining a target function and a cost matrix based on the first index and the second index; establishing an additional pseudo code allocation model based on the cost matrix and an allocation matrix; dividing the additional pseudo codes into two parts, determining an initial population based on the division result, and solving the model by using a JVC algorithm to determine the initial pairing scheme corresponding to the individuals in the initial population; performing iterative updating on the population based on a meta-heuristic algorithm or an improved meta-heuristic algorithm, and performing iterative updating on the pairing scheme corresponding to the individuals based on the JVC algorithm until a preset maximum number of iterations is reached, and determining the optimal pairing scheme obtained in the last iteration process as the optimal pairing scheme of the non-fixed additional pseudo codes; wherein the optimal pairing scheme obtained in the iteration process is determined based on the target function.

The application provides a ranging and communication integrated implementation method and system, and relates to the technical field of ranging and communication integration. The method comprises the following steps: performing non-uniform coding on a communication information bit stream to generate a non-uniform communication code sequence; fusing the non-uniform communication code sequence with a preset ranging pseudo code sequence to obtain an integrated composite code sequence; performing phase modulation on a carrier based on the integrated composite code sequence to output a modulated wave signal; demodulating the modulated wave signal to obtain a baseband composite code sequence estimation; performing pseudo code synchronization on the baseband composite code sequence estimation to obtain a measured distance, and performing non-uniform decoding on the baseband composite code sequence estimation to recover the communication information. The application has the advantages of high communication rate, simultaneous ranging and communication, and no influence on the main interference phase signal measurement.

The application provides a binary security patch detection method and system, electronic equipment and storage medium, and relates to the technical field of network security.The application can effectively reduce the differential noise introduced by variable renaming, compiler optimization and other factors by processing the pseudo code of the binary program through the iterative variable mapping and differential alignment algorithm, generate the high-quality pseudo code differential text after alignment, and provide clear and accurate input basis for subsequent security analysis;Further, through the large language model agent analysis mechanism, the program semantic information across functions and processes can be intelligently identified and utilized, the security impact of the patch is deeply reasoned, and finally the accurate detection and judgment of the binary security patch are realized.The application provides a security patch detection scheme which does not depend on the source code, can effectively process the binary program difference noise, and can comprehensively utilize the context information for accurate judgment.

The application provides a fuzzy control-based TT&C signal fine acquisition method and device, and belongs to the field of satellite-borne TT&C transponder signal processing. The method comprises the following steps: acquiring a pseudo-code delay coarse estimation value and a Doppler frequency coarse estimation value respectively; determining the value range corresponding to the input variable of the pseudo-code delay dimension and the value range corresponding to the input variable of the Doppler frequency dimension; determining the input fuzzy set of the pseudo-code delay dimension and the corresponding input membership function according to the input variable of the dimension, and determining the input fuzzy set of the Doppler frequency dimension and the corresponding input membership function according to the input variable of the dimension; for each dimension, performing a bias value estimation operation in the fuzzy set corresponding to the input variable of the dimension to obtain the bias estimation value corresponding to the dimension; and determining the fine acquisition value of the dimension according to the coarse estimation value and the bias estimation value corresponding to the input variable of the dimension. The application can improve the estimation accuracy of TT&C signals.

The single carrier high-precision two-way ranging method based on orthogonal waveform design belongs to the field of communication signal processing.The method of the present application is as follows: in the scene where the frequency spectrum and hardware implementation resources are strongly limited, a UAV node generates information according to a ranging frame structure.The frame structure comprises a pilot head, a frame synchronization head, a control field, ranging information, inertial navigation and dynamic information, and other redundant information. By using coherent pilots orthogonal to communication signals, combined with a two-way comparison algorithm and pilot phase discrimination, high-precision and low-processing-delay networking ranging is realized.The present application has the following advantages: (1) the orthogonal waveform is used to save spectrum resources without affecting the communication and ranging performance; (2) on the basis of simple pseudo-code ranging, the ranging result is corrected by using the phase discrimination method, which significantly improves the ranging accuracy and has low processing complexity and processing delay; (3) combined with the expandable two-way comparison strategy, networking ranging of large-scale UAV clusters is realized.

This disclosure relates to method and system for generating scripts for simulation model development. The method may include retrieving a plurality of requirements from a user input, and a Static Knowledge Corpus (SKC), and a Dynamic Knowledge Corpus (DKC) from a data storage. The method may further include generating, via a Large Language Model (LLM), an interface list corresponding to each of the plurality of requirements using the SKC and the DKC. The method may further include generating, via the LLM, a pseudo code corresponding to each of the plurality of requirements using the interface list and the SKC. For each of the plurality of requirements, the method may further include adding the corresponding interface list and the corresponding pseudo code to a configuration file. The method may further include generating a script for simulation model development based on the configuration file.

The application discloses an image recognition method, device, storage medium and apparatus, which comprises the following steps: determining corresponding pseudo codes according to different water operation, and determining a target pseudo code from the pseudo codes according to a current water operation; analyzing the target pseudo code, and calling each target function according to the analyzed target pseudo code; encapsulating each target function into a target image recognition function; and performing image recognition on a target water operation image according to the target image recognition function. When the system is designed in a hierarchical manner, each layer of the system is designed with corresponding target functions, then the target pseudo code corresponding to the current water operation is determined, and the target functions in each layer of the system are called according to the target pseudo code, the called target functions are encapsulated into the target image recognition function according to the calling sequence, and the target water operation image is recognized through the target image recognition function, so that the platform only needs to analyze the image recognition result, and the construction cost of the platform is reduced.

This invention discloses a ranging device and method combining pseudocode and dual optical combs, belonging to the field of dual optical comb ranging technology. The light from the signal optical comb is modulated by a pseudocode through an acousto-optic modulator. One path of the modulated light serves as the reference light, and the other as the measurement light. Both paths pass through a beam splitter and enter a photodetector. The photodetector converts the optical signal into an electrical signal. An electrical filter filters out a sinusoidal signal with the repetition frequency of the optical comb as the carrier. Since this signal contains pseudocode modulation information, the time-of-flight of the pseudocode can be obtained by performing an autocorrelation operation on the filtered signals from the first and second photodetectors, thus yielding the distance to be measured. This invention provides a simple and easy-to-use method for effectively extending the unambiguous range of dual-comb ranging systems, and has certain application value in ultra-large-scale measurement scenarios.