64 results about "Syncword" patented technology

The invention discloses an airborne universal serial communication bus receiving board card based on a MiniVPX architecture, and relates to the technical field of avionics testing. The problems of function solidification, framework limitation and the like generally existing in existing serial communication acquisition board cards and commercially available general products are solved. According to the board card, an FPGA (Field Programmable Gate Array) is adopted as a core controller, an RS-232 / 485 / 422 multi-protocol interface circuit module, an isolation power supply module and a PCIe (Peripheral Component Interconnect Express) high-speed communication module are integrated, and 77 * 110 * 11.5 mm compact packaging is realized through a MiniVPX standard. Three working modes are innovatively supported: a synchronous word / gaptime screening mechanism is provided in a UART (Universal Asynchronous Receiver / Transmitter) mode, NRZ and Manchester multi-code adaptive decoding is realized in a PCM (Pulse Code Modulation) mode, and self-defined frame format configuration is supported in a Manchester code signal mode with a synchronous head. The method is also suitable for the technical field of space constraint and high-density integration of avionics equipment.

The invention discloses a multichannel LED digital control system and method. The system comprises a main controller which generates an LED control instruction and sends a data frame through a differential bus; the plurality of LED driving modules are connected with the main controller through a differential bus, and each LED driving module comprises a differential receiver for receiving a differential signal of the differential bus; the UART communication module is connected with the differential receiver and converts the differential signal into serial data; the data processing state machine module is connected with the UART communication module and is used for analyzing the received data frame, and the data frame comprises a synchronous byte, a device address / command composite byte, a register address byte, a data byte and a CRC (Cyclic Redundancy Check) check byte; the digital logic counter is used for measuring the bit width of each data bit in the synchronous bytes and calibrating the sampling time sequence of the UART communication module based on a measurement result; the register group is used for storing LED control parameters; and the multi-path PWM generator is connected with the register block and generates multi-path PWM signals according to the LED control parameters so as to drive the LEDs. The power consumption is reduced.

The present application relates to a PPDU transmission method and apparatus, and a readable storage medium, the method comprising: an AMP device sending an AMP PPDU, the AMP PPDU comprising a synchronization field, a signaling field, and a payload, the synchronization field being generated based on a synchronization sequence, the synchronization sequence being used to indicate or correspond to at least one data rate, the signaling field being generated based on the synchronization field, and the payload being generated based on the synchronization field; the first information in the signaling field is used to indicate a data rate of the payload in conjunction with the synchronization sequence. By adopting the method and the device, the bit number of the signaling field can be saved, and the detection reliability of the synchronization sequence can be improved. The method and the device can be applied to the AMP field, such as supporting WPT, WLAN or IEEE series protocols. The method is suitable for IEEE (Institute of Electrical and Electronic Engineers) 802.11 protocols related to AMP (Amplification Management Protocol) or other protocols suitable for IEEE 802.11 series, such as 802.11 a / b / g / n / ac / ax / bee / bn protocols and the like.

The invention discloses a frequency offset estimation method of a Bluetooth signal based on a reconstructed GFSK (Gaussian Frequency Shift Keying) differential phase. A Bluetooth receiver solves an actual differential phase on each sampling point of each Bluetooth symbol of a synchronization word or an access address in a Bluetooth receive signal and reconstructs a reference differential phase of each Bluetooth symbol of a synchronization word or an access address in a Bluetooth receive signal based on and calculates an initial of a Bluetooth receive signal and performing initial frequency offset compensation on the initial frequency offset estimation value. And the Bluetooth receiving end tracks the residual frequency offset of the Bluetooth receiving signal after the initial frequency offset compensation. According to the method, the frequency offset estimation precision can be effectively improved, the operand is greatly simplified, and the implementation complexity is reduced.

The invention provides a data synchronization method and device, computer equipment and a storage medium. The method comprises the following steps: when a data updating event in a first storage cluster is detected, acquiring library table information corresponding to the data updating event; performing synchronization rule searching in a preset synchronization rule base based on the base table information to obtain a target synchronization rule; extracting a synchronization field from the target synchronization rule, and extracting update content from a library table corresponding to the library table information based on the synchronization field; generating a synchronization event message based on the update content and the rule label of the target synchronization rule; and sending the synchronization event message to a message queue, so that the synchronization execution component calls a write data interface of at least one second storage cluster indicated by the target synchronization rule based on the synchronization event message after subscribing to the synchronization event message in the message queue, and synchronizes the update content to the second storage cluster. According to the method, the synchronization of the other part of data among the storage clusters can be realized on the basis of keeping the part of data in the storage clusters independent.

The application discloses a method and device for sensing, judging and processing data structure change. The method comprises the following steps: collecting a data structure change event based on a change data capture tool; constructing a data structure change abstract syntax tree through a SQL parser to accurately identify the change operation type and content; obtaining structure snapshots before and after the change; executing compatibility judgment in combination with a compatibility rule library to output the compatibility state and risk level; adopting a hierarchical message notification strategy according to the risk level; and automatically triggering or arranging corresponding processing actions, such as automatically synchronizing fields, generating a compatible view or suspending a high-risk task. The application realizes semantic-level analysis of data structure change, automatic compatibility judgment, refined risk grading and automatic processing, significantly reduces the cost of manual intervention, effectively avoids downstream synchronization interruption and data quality abnormalities caused by structure change, and improves the stability and automatic operation and maintenance level of a medium or large data platform.

Embodiments of the present application provide a data synchronization method and device, equipment and storage medium, relating to the technical field of computer, in particular to an implementation mode of directly synchronizing data of databases applied to different cloud vendors; in the present application, the central service component of the source database receives a synchronization request sent by the synchronization service component of the target database for a data synchronization task, the synchronization request carrying a synchronization field used for indicating a starting query position and a query data quantity used for determining a terminal query position; based on the synchronization field, the synchronization data matched with the query data quantity is obtained from the source data table; the synchronization data is encrypted by using a task public key, and the obtained encrypted data is returned to the synchronization service component. In the cross-cloud scenario, the data synchronization of the source database and the target database is implemented, so as to fully utilize the resources and advantages of different cloud databases and improve the service quality and response speed in the global range.

Provided are a communication method, device and system, which belong to the technical field of communications, the communication method comprising: generating a transmission frame, the transmission frame comprising an SYNC field and an SFD field located behind the SYNC field, the SFD field being used for indicating a communication mode supported by the transmission frame, the communication mode comprising an ultra-wideband independent working mode and a narrowband-assisted ultra-wideband working mode; and the transmission frame is sent, the SYNC field is used for time-frequency synchronization, and the SFD field is used for determining the initial position of the subsequent field. The method and the device can flexibly adapt to different high-precision positioning and communication application scenes and equipment. The method and the device are used for data communication and positioning.

The present invention provides a data transmission method between devices, and a storage medium. The method comprises: pairing a first communication device and a second communication device to determine a synchronization word and channel for data transmission; when sending a first type of message, on the basis of the synchronization word and channel for data transmission, performing transmission of the first type of message between the first communication device and the second communication device in the mode of one device transmitting and the other receiving; and when sending a second type of message, on the basis of the synchronization word and channel for data transmission, performing transmission of the second type of message between the first communication device and the second communication device in the mode of continuous transmission and reception. According to the present application, in a communication process, on the basis of message feature determination, the use of the mode of continuous transmission and reception allows for ongoing data transmission without the need to switch between transmitting and receiving states, thereby avoiding time-consuming waiting, and enhancing the transmission speed and timeliness. The present application adopts a half-duplex mode having lower cost and less energy consumption, and is more conducive to commercialization of the technology.

The invention discloses a handshake-free high-reliability high-speed communication self-training method based on an FPGA (Field Programmable Gate Array). The method comprises the following steps: initializing a data delay value; under the condition that a serial clock is kept unchanged, the FPGA increases a delay value of serial data by a time unit, after the delay value is increased, the serial data is shifted, a synchronous field in LVDS communication is searched in the shifted serial data, and whether the synchronous field can be searched or not is taken as a search result; recording the time delay value and the search result; repeatedly recording for N times, screening out a delay value capable of finding out a synchronous field in LVDS communication from all recorded delay values and search results, obtaining a continuous interval formed by the delay values, and selecting a test delay value from the continuous interval; setting the size of a delay value in the serial data as a test delay value, and checking whether the test delay value is feasible or not; and if the time delay is feasible, obtaining a final time delay value and starting LVDS (Low Voltage Differential Signaling) communication. According to the invention, manual intervention is not needed, and the environmental adaptability and stability of the LVDS communication link in the equipment can be enhanced.

The invention discloses an FPGA (Field Programmable Gate Array) online upgrade failure solving method, which comprises the following steps of: starting to read configuration data byte by byte from an initial position, jumping to a target address after a preset synchronization word is read, starting to load mirror image data of a first timer, and configuring the first timer; after the mirror image data of the first timer is loaded, successfully starting the first timer to start timing, reading the mirror image of the to-be-updated program, performing integrity verification on the mirror image of the to-be-updated program, starting to load the mirror image of the to-be-updated program if the verification is successful in the first preset time, and otherwise, reading mirror image data of the second timer, and starting a second timer to start timing, and if the complete to-be-updated program mirror image is not read within a second preset time, triggering a rollback event. Therefore, by introducing the two timers, overtime detection and program integrity verification are carried out in the upgrading process, so that the system can rapidly return to a stable state when upgrading fails, and the upgrading success rate and the system reliability are improved.

The invention relates to the technical field of wireless communication, in particular to a frame header detection method and system for a satellite television broadcasting system, and the method comprises the steps: monitoring a radio frequency end in real time, collecting baseband IQ data to be subjected to frame header detection from the radio frequency end, and carrying out the calculation to obtain a differential phase of the baseband IQ data to be subjected to frame header detection; obtaining synchronous word symbols, and constructing a phase difference query table based on the synchronous word symbols; performing rotation adjustment on elements of a differential phase of the baseband IQ data to be subjected to frame header detection according to the phase difference query table, and then calculating the sum of phase differences; and calculating and obtaining frame header position information of the baseband I Q data to be subjected to frame header detection based on the phase sum. According to the invention, the problem of balancing the anti-frequency-offset performance and the anti-noise performance in the prior art is solved, the system architecture is simplified, and a more efficient and reliable synchronous detection means is provided for a satellite television broadcasting system.

The invention discloses a device communication method and device, a device and a storage medium, relates to the technical field of data communication, is applied to a master device, and comprises the following steps: in a first communication mode, sending a synchronous character to a slave device by using a current baud rate, and then obtaining a to-be-verified character returned by the slave device based on a self fixed baud rate; the current baud rate is a baud rate value determined based on a preset baud rate sequence, and the to-be-verified character is a character locally and correspondingly received by the slave device after the master device sends a synchronous character to the slave device; if the to-be-verified character is consistent with the synchronous character, sending a termination character to the slave device by using the current baud rate, so that the slave device terminates the first communication mode when receiving the termination character, and enters a second communication mode; and if not, re-determining the current baud rate from the baud rate sequence. Therefore, the master device can be automatically matched with the baud rate of the slave device, manual debugging is avoided, no complex calculation process exists, implementation is easy, and stability is good.

The present invention relates to the field of CMOS detectors, and more particularly to a simulation detection method for dynamic conditioning of detector serial image data. The method simulates a change in the serial data combination mode caused by a timing reset by changing the corresponding relationship between the count value of a serial data transmitter and the data bit. During the detector training phase, the method detects the full state conditioning process and sends constant training words and single training word serial data in a step-by-step manner. During the non-training imaging phase, whenever a line synchronization (SYNC) signal pulse is detected, four synchronization words are sequentially output, followed by non-synchronization word data, and the corresponding relationship between the count value of the serial data transmitter and the data bit is changed once. The method detects the full state conditioning process during the training phase and sends constant training words and single training word serial data in a step-by-step manner, thereby preventing errors in the normal training state caused by changes in the serial data sequence due to the simulated timing reset.

The application provides a decoding method for ARINC specification flight data, wherein the ARINC specification at least includes ARINC717 specification and ARINC767 specification, the decoding method includes reading original flight data file to form binary data stream, searching all synchronization words and obtaining position data of each synchronization word; obtaining position difference data of each synchronization word according to the position data, and comparing the position difference data with corresponding specification interval data, when the position difference data is consistent with the specification interval data, corresponding synchronization word is confirmed as a checked valid synchronization word; for each valid synchronization word, parameter information associated with the valid synchronization word is obtained, and the parameter information is matched with parameter acquisition information contained in a decoding parameter library, when the matching is successful, the parameter information is decoded in combination with attributes of each parameter in flight data contained in the decoding parameter library, so that parameter values of each parameter contained in the flight data are obtained.

Embodiments of the present application provide a vehicle cooperative positioning method and device in a vehicle fleet, a storage medium and an electronic device, wherein each vehicle in the vehicle fleet is configured with a preset synchronization word, and a data packet of each vehicle includes the preset synchronization word and a data frame for carrying positioning data, and the data frame in the data packet of each vehicle is a CRSF telemetry frame; the method comprises: extracting the synchronization word in a first data packet of a target vehicle; in response to the synchronization word in the first data packet matching the preset synchronization word, analyzing a first data frame in the first data packet to obtain a vehicle identifier of the target vehicle and positioning data of the target vehicle; in a case where the vehicle identifier of the target vehicle and the positioning data of the target vehicle are obtained, updating the positioning data of the target vehicle to a cooperative database locally of the vehicle based on the vehicle identifier of the target vehicle; and based on the cooperative database, rendering a position point of each identified vehicle on a regional map preloaded in the vehicle.

Techniques for synchronizing operation among multiple controllers. In an example, a method includes generating, at a first controller, a first synchronization word for a task, the first synchronization word including a first controller identification (ID) that identifies the first controller, and outputting, by the first controller, an output data signal including the first synchronization word. The method further includes receiving, at the first controller, an input data signal that includes a second synchronization word for the task, the second synchronization word including a second controller ID that identifies a second controller, updating, by the first controller and responsive to receiving the second synchronization word, an interrupt status record for the task, and generating, responsive to the interrupt status record reaching a threshold value, an interrupt signal instructing the first controller to perform the task, and outputting, by the first controller, the output data signal including the second synchronization word.

The invention provides a cross-terminal data collaborative management method and system for an e-commerce shopping platform, and the method comprises the steps: obtaining data change requests of a plurality of heterogeneous terminals, carrying out the standardized structure conversion, and generating a field operation record set and a corresponding time calibration function; according to the field operation record set and the corresponding time calibration function, performing conflict detection on concurrent operation of the same field; according to the field decision result, executing a write-in arbitration log in combination with a field service weight and a behavior continuity index, and generating a traceable change log; and for each log item of the traceable change log, calculating a push priority score to generate a push priority, synchronizing field update to a terminal according to the push priority, and implementing closed-loop monitoring and repairing based on a state offset score. According to the method, the problems that multi-end concurrent writing is performed, field-level conflicts are uncontrollable, state differences cannot be sensed, and synchronization exceptions cannot be traced back are systematically solved.

In one implementation, a method comprises: receiving, in a first radio, a radio frequency (RF) signal and processing the RF signal to provide a bit stream to a digital circuit of the first radio; enabling a first correlator of the first radio to detect at least a first portion of a sync word of a wake-up packet of the bit stream, and thereafter enabling a second correlator of the first radio to detect at least a second portion of the sync word; enabling an averager circuit to detect another portion of the sync word; and in response to detection of the sync word, disabling the first and second correlators and maintaining the averager circuit enabled.

The invention relates to the technical field of aviation data recording and processing, in particular to a QAR data expansion method and device based on non-hardware modification. The method comprises the following steps: modifying software of an upstream data acquisition component of the aircraft QAR system to realize modification of starting point trigger logic of data records from a first event to a second event earlier than the first event, and setting a synchronization word compatible with a downstream component; adjusting the working mode of the downstream component, closing the data segmentation function of the downstream component, and adapting to the data stream transmitted by the upstream component; and loading the modified software to an upstream data acquisition component, and configuring the adjusted working mode to a downstream component to realize the recording time range expansion of the QAR data. According to the method, the upgrading cost of single-rack aircraft data recording range expansion is greatly reduced, the upgrading time of a single-rack aircraft can be controlled within one hour, the method is successfully adaptive to multiple types of fleets, and complete recording of data in the whole engine starting process can be achieved.

Procedures, methods, architectures, apparatuses, systems, devices, and computer program products for low latency traffic with wake-up radio signals in Wi-Fi. One method may include receiving, from an access point (AP), an aggregated physical protocol data unit (A-PPDU) including any of: a first non-wakeup radio (WUR) physical protocol data unit (PPDU) occupying one or more first resource units, a second non-WUR PPDU occupying one or more second resource units, and a wakeup radio (WUR) PPDU occupying one or more third resource units. The method may include receiving, from or in the WUR PPDU, a WUR synchronization field and a WUR data field to wake up a main radio of the STA. The WUR PPDU may include a wake-up period following the WUR data field for enabling the main radio to come out of a sleep mode. The method may then include receiving, from the AP, low latency traffic by the main radio.

The application discloses a Bluetooth device, a Bluetooth device multi-link fast switching method and system, the method comprises the following steps: calculating the syncword time difference between the time when the device acting as a slave role in each link receives the packet from the source device and the time when the device acting as a slave role in each link receives the packet from the source device; adjusting the microsecond clock in the local clock of the device acting as a slave role in each link based on the syncword time difference, keeping the microsecond clock offset of the device acting as a slave role in each link unchanged, and keeping the local clock of the device acting as a slave role in each link and the clock of the source device synchronized. In the application, the phase difference of the clock system of each link can be kept synchronized, so that the microsecond clock offset does not need to be updated when switching, part of the switching time consumption ratio can be saved, and the purpose of fast switching is achieved.

The invention provides a data synchronization method, system and device supporting commercial secret algorithm conversion and a medium, and belongs to the field of information technology and data security, and the method comprises the following steps: obtaining a source data table list and a target data table list; obtaining an adapter resource pool; creating a data synchronization task, wherein the data synchronization task comprises a to-be-synchronized field marked with at least one of a decryption demand and an encryption demand; executing a data synchronization task and writing the encrypted data into a target data table; the execution of the data synchronization task specifically comprises the steps of reading target data from a source data table according to a to-be-synchronized field, and calling a specified decryption adapter to decrypt the target data corresponding to the to-be-synchronized field with a decryption requirement to obtain intermediate plaintext data, and calling a specified encryption adapter to encrypt the intermediate plaintext data or the target data which has the decryption requirement and skips the decryption operation to obtain encrypted data. According to the method, the security and availability of the sensitive data are improved.

The invention relates to a satellite parameterization design system and method. The system comprises a parameter configuration module used for carrying out configurable setting on key parameters of a satellite measurement and control link through an uplink remote control link or a communication bus; the key parameters comprise uplink and downlink frequency points, code blocks, spacecraft identifiers, address synchronization words and encryption and decryption key parameters; the parameter backup module is used for storing the configured key parameters in at least three storage media with a power-down nonvolatile characteristic; the parameter recovery module is used for recovering the key parameters from the storage media passing the verification according to the reliability priorities of the storage media after power-on, and when all the storage media are verified to be abnormal, the key parameters are recovered to default parameters; wherein when the parameter configuration module configures parameters, a protocol with a verification algorithm is adopted, and the configured parameters issue real-time values through a downlink telemetering link so as to observe the effective state. By adopting the method, the efficiency and the safety can be improved.

The invention discloses a synchronous word detection circuit and detection method based on a Soundwire protocol and a chip, the detection circuit comprises an initial register and a plurality of transmission units, and each transmission unit comprises a plurality of registers and a selector which are arranged at intervals; the input end of the register serving as the first position of the downstream transmission unit and the second input ends of all the selectors are connected with the output end of the register serving as the last position of the upstream transmission unit, and the initial register is used for receiving data; and determining whether the synchronization word is a synchronization word of a data frame in the Soundwire protocol based on the output signals of the last register and the initial register of each transmission unit. According to the synchronous word detection circuit, the detection method and the chip based on the Soundwire protocol, data frame transmission is carried out through the initial register and the transmission units, whether a synchronous word is a synchronous word of a data frame in the Soundwire protocol or not can be confirmed through the last register of each transmission unit and the output of the initial register, and rapid and effective synchronous word detection is achieved.

The invention relates to an IPTV (Internet Protocol Television) video encapsulation verification method. The method comprises the following steps of: directly accessing and analyzing IPTV on-demand program transport stream TS (Transport Stream) data in an online storage system; analyzing a plurality of transmission packets in the TS data in sequence; based on a preset verification rule set, packaging normativity verification is carried out on the parsed field; wherein if a predefined type of packaging error is identified in the analysis process, the subsequent verification process of the current program source is immediately interrupted. The predefined type of packaging error comprises at least one of a synchronous byte error and a secondary error defined according to the ETSI TR101290 standard. According to the method, by introducing an online detection and error interruption mechanism, efficient and automatic verification of massive video files is realized, the packaging problem can be quickly positioned without completely traversing the files, the detection efficiency is effectively improved, the method can be integrated with an existing service system, the program state is automatically managed, and the risk of manual operation is reduced.

The present application relates to a PPDU transmission method and apparatus, and a readable storage medium. The method comprises: an AMP device sends an AMP PPDU, wherein the AMP PPDU comprises a synchronization field, a signaling field, and a payload, the synchronization field is generated on the basis of a synchronization sequence, the synchronization sequence is used for indicating or corresponds to at least one data rate, and first information in the signaling field is used, in conjunction with the synchronization sequence, for indicating the data rate of the payload. By means of the present application, the number of bits in a signaling field can be reduced, and the detection reliability of a synchronization sequence can be improved. The present application can be applied to the field of AMP, for example, supporting WPT, WLAN, IEEE series protocols, etc., for example, AMP-related protocols of IEEE 802.11, or other protocols applicable to the IEEE 802.11 series, such as 802.11a / b / g / n / ac / ax / be / bn protocols.

An integrated circuit with an interface circuit is described. During operation, the interface circuit may receive signals corresponding to a header of a frame that is compatible with a serial communication protocol, where the received signals include a temporal pattern of binary bits with instances of a dominant signal level and a recessive signal level. Then, the interface circuit may compute a set of conditions based at least in part on the receive signals, where, when valid, the set of conditions identify a first dominant bit in the binary bits having the dominant signal level. Moreover, when the set of conditions are valid, the interface circuit may: determine a location of synchronization field in the header relative to the identified first dominant bit; and calculate a baud rate of the receive signals based at least in part on a subset of the binary bits in the synchronization field.

The present application relates to the field of communication technology, specifically to a self-synchronous decoding method based on polar code, comprising: selecting part of the frozen bit position to embed a preset synchronization identification sequence when constructing the polar code encoding structure at the sending end, introducing synchronization auxiliary capability under the premise of maintaining non-information bearing attribute; based on the frozen bit symbol stability change trend and path metric value mutation characteristics, identifying multiple synchronization candidate starting positions during the bit stream receiving process at the receiving end; performing restricted depth decoding on each candidate point, calculating the Hamming consistency score of the frozen bit and the synchronization sequence, and constructing a synchronization confidence function by weighting fusion with the path metric value to determine the optimal synchronization starting point and then perform the complete polar code decoding process to recover the original information bit. The method does not require an independent synchronization field, has high synchronization accuracy and decoding efficiency, and is suitable for low latency and low resource occupation scenarios in high-speed communication.