34 results about "Communication reception" patented technology

The application discloses a frame synchronization-based laser communication and ranging integrated system, and belongs to the technical field of satellite laser communication.The system solves the problem that ranging precision is limited under the condition of low communication rate.The system comprises a sending end and a receiving end, wherein the sending end comprises a synchronization header sequence generating module, a data sequence generating module and a framing module, the receiving end comprises a synchronization sliding correlation / rough ranging calculation module, a fine ranging calculation module and a data sequence extracting module; the synchronization header sequence generating module generates a synchronization header sequence, the data sequence generating module generates a data sequence, and the framing module completes splicing of the synchronization header sequence and the data sequence; the synchronization sliding correlation / rough ranging calculation module performs frame synchronization and calculates an integer symbol period of transmission delay, the fine ranging calculation module calculates a fractional symbol period of transmission delay, and the data sequence extracting module performs frame disassembly according to a starting position of the synchronization header sequence, extracts the data sequence and completes communication reception.

The embodiment of the invention provides a baud rate adjusting method and device, electronic equipment and a storage medium. The method comprises the steps that the current environment temperature of the equipment and the environment temperature of the last moment are acquired; when the temperature difference between the current environment temperature and the environment temperature at the previous moment is greater than a preset temperature, determining a current baud rate coarse adjustment value, a current clock frequency and the sampling times for the communication rate of the equipment; determining a target baud rate according to the current baud rate coarse adjustment value, the current clock frequency and the sampling times; and determining the current baud rate, and adjusting the current baud rate to the target baud rate. Therefore, when the current temperature environment changes, the target baud rate can be determined in time according to the current baud rate coarse adjustment value, the current clock frequency and the sampling times, and the current baud rate is adjusted, so that the phenomenon that communication receiving or sending fails due to the fact that the error between the current baud rate and the actual requirement exceeds a certain range is avoided.

The embodiment of the invention provides a communication and sensing integrated device and a working method thereof, and belongs to the technical field of wireless communication and radar sensing fusion, and the device comprises a millimeter wave digital processing module, a communication module, a communication and sensing link and an antenna array plane, wherein the millimeter wave digital processing module is used for receiving a reference clock signal of an external baseband processing unit, generating a reference signal and simultaneously processing a communication signal and a radar signal; the sensing link comprises M communication links and N radar links, each communication link comprises a communication transmitting branch and a communication receiving branch, and each radar link comprises a radar transmitting branch and a radar receiving branch; uploading the radar data to a public network in an independent networking mode; the antenna array plane is connected with the communication link through the first channel and connected with the radar link through the second channel, the first channel and the second channel achieve time division multiplexing through the change-over switch, the communication and sensing cooperation efficiency is improved through hardware multiplexing and intelligent switching, and meanwhile the system complexity and cost are reduced.

The present invention provides a working method for a communication perception symbiotic system, which belongs to the field of communication perception integrated architecture and digital signal processing. The method includes establishing a communication signal transmission model based on the communication perception symbiotic system; performing communication reception signal processing at the communication user; establishing a perception signal model in the communication perception symbiotic system; performing perception echo signal processing at the perception node, and using the communication perception integrated signal to provide communication services to Internet of Vehicles users. The perception node uses dimensionality reduction maximum likelihood estimation based on the perception echo signal to achieve perception of the communication user and the perception target; and feeding back the perception results obtained by the perception node to the base station to assist in realizing the design of the downlink communication perception integrated signal at the next moment. The present invention can effectively avoid the problem of perception performance degradation caused by self-interference problems and effectively reduce hardware costs and energy consumption.

The present invention discloses a cloud computing platform virtual private network system and a network control method. The system includes at least two physical machines and a router; each physical machine realizes the connection of a virtual private network through a router; each physical machine includes a physical network card, a flow controller and at least one virtual machine; the physical network card records the network address of each virtual machine in the physical machine, and the virtual machine accesses the virtual private network through the physical network card on the physical machine; the physical network card also includes a routing access table, and the routing access table records the network address of other virtual machines in the virtual private network. The flow controller is used to control the communication initiation and communication reception of each virtual machine on the physical machine. The present invention reduces the number of times the router ARP routing table is traversed and shares the workload of the router through the design of the routing access table and the flow controller; at the same time, the security protection capability of the virtual private network system itself and the ability to quickly cut off the flow when encountering an attack are greatly improved.

The invention discloses a short-wave communication equalization method and system based on decision feedback iteration, and the method specifically comprises the steps: enabling a transmitting end to carry out the coding, interweaving and mapping of data information, generating a plurality of unknown data blocks, enabling known data sequences to be inserted between the unknown data blocks at intervals, forming a data segment sequence, and transmitting the data segment sequence to a receiving end through a channel; a receiving end extracts known data sub-segments and sends the known data sub-segments to a channel estimation module to estimate channel impulse response, the known data sub-segments and unknown data sub-segments extracted by the receiving end are sent to a first equalizer at the same time for segment-by-segment equalization, and then LLR calculation, de-interleaving and decoding are carried out; judging whether the decoding result meets an iteration ending condition or not, and if yes, ending iteration; and otherwise, coding, interleaving and mapping a decoding result, dividing a mapping result into mapping sub-segments, inputting the mapping sub-segments as initial values of iteration into a second equalizer for segment-by-segment equalization, and then performing LLR calculation, de-interleaving and decoding processes until iteration is finished. The short-wave communication receiving performance is improved, the operand is low, and the numerical calculation stability is good.

The present invention discloses a reconfigurable communication perception device and method, the device is arranged in the communication system of the device, including: a baseband interface module and a communication function module and a perception function module both of which are bidirectionally connected to the baseband interface module; the communication function module and the perception function module are executed in parallel; the perception function module is used to receive and process the second communication transmission signal sent by the baseband interface module, or the second communication reception signal sent by the device; the function signal is obtained by parsing, so as to call the corresponding function execution file according to the function signal, and then the function signal is processed by the function execution file; the function signal corresponding to the processed second communication reception signal is sent out through the baseband interface module, or the function signal corresponding to the processed second communication transmission signal is output to the device. The present invention solves the technical problems of the prior art that large hardware logic resources are required and the flexibility is low.

Certain aspects of the present disclosure provide techniques for wireless communications. An example method includes receiving first downlink control information (DCI) indicating a first quantity of antennas for downlink communication reception, wherein the first quantity of antennas is associated with a first application timeline; receiving, after receiving the first DCI and within the first application timeline, second DCI indicating a second quantity of antennas for downlink communication reception, wherein the second quantity of antennas is associated with a second application timeline; and receiving a downlink communication using the first quantity of antennas or using the second quantity of antennas based at least in part on timing of the downlink communication relative to at least one of the first application timeline or the second application timeline.

Certain aspects of the present disclosure provide techniques for wireless communications. An example method includes receiving first downlink control information (DCI) indicating a first quantity of antennas for downlink communication reception, wherein the first quantity of antennas is associated with a first application timeline; receiving, after receiving the first DCI and within the first application timeline, second DCI indicating a second quantity of antennas for downlink communication reception, wherein the second quantity of antennas is associated with a second application timeline; and receiving a downlink communication using the first quantity of antennas or using the second quantity of antennas based at least in part on timing of the downlink communication relative to at least one of the first application timeline or the second application timeline.

The invention discloses a digital automatic gain control structure in a power line carrier communication receiving process, relates to the technical field of power line carrier communication, solves the technical problem that narrowband interference has a great influence on accurate evaluation of signal energy, and the key points of the technical solution are to realize rapid adjustment of large signal saturation and accurate counting and analysis of pulse interference through an energy saturation preprocessing unit; to realize detection and suppression of narrowband interference signals in and out of the band through a narrowband interference detection and suppression unit, thereby improving the accuracy of effective signal energy estimation; to realize rapid convergence of a power line carrier signal with continuously changing amplitude through an exponential sliding averager, thereby effectively reducing the jitter of gain adjustment.

The invention provides an aero-engine throttle power failure and communication receiving failure fault handling control method, and belongs to the field of fault handling control. The super capacitor module is additionally arranged in the accelerator driving device controller, and when a power supply of the controller fails, energy supply for pushing an engine accelerator to a proper position is achieved. And meanwhile, the accelerator driving device controller is provided with an accelerator angle control strategy under a special situation fault. The method can be used for the unmanned aircraft provided with the mechanical throttle control engine, and the safety of the aircraft and the engine can be ensured when special situations occur.

The invention provides a state detection circuit of an initiation device, which can be used for effectively detecting a microswitch or a snap line in the initiation device and is high in detection efficiency. Comprising an external communication module used for communication reception of a detonation signal; the ignition control module is connected with the detonator and is used for realizing explosion and ignition control; the microswitch state detection module is connected with the microswitch and is used for detecting the short-circuit state of the microswitch; the detonating line state detection module is connected with the detonating line and used for detecting the state of the detonating line; and the control module is connected with the external communication module, the ignition control module, the microswitch state detection module and the detonation detection module, and is used for carrying out signal transceiving and state detection so as to realize ignition control output.

The invention discloses a multi-user random access transmission method, and belongs to the technical field of wireless communication receiving. The method comprises the steps that in a set scene, a system randomly generates a switching mode to be bound with an access user in advance, and the user can perform data transmission in a specified time slot by using the switching mode. The system selects the modulation mode of the user according to the range of the number of active users, and a receiving end can realize symbol detection and decoding of any modulation mode. Compared with an existing ODMA system multi-user detection and decoding scheme, the method has the advantages that a receiving end can perform user identity recognition according to a switching mode through pre-binding of the switching mode and the user, the adaptive modulation mode enables the transmission symbol length to be reduced when the user transmits bit data with the same length, the user access density is reduced, and the decoding efficiency is improved. The ultra-sparse characteristic of the system is guaranteed, interference caused by superposition of other user information is reduced, and therefore the detection and decoding performance of a receiving end is improved, the system supports larger-scale connection, and obvious performance gain can be obtained in medium and high user areas.

The present invention discloses a method, device, equipment, medium and product for processing inter-train communication data. The method includes: during the current train's travel, when receiving the first train-to-train communication data, collecting the current train's receiving position information and receiving timestamp; collecting the current train's signal association information; determining the communication reception record based on the first train-to-train communication data, receiving timestamp, receiving position information and signal association information, and storing the communication reception record in association with the reception record identifier; when obtaining the second train-to-train communication data to be sent, collecting the current train's sending position information and sending timestamp; determining the communication sending record based on the second train-to-train communication data, sending timestamp and sending position information, and storing the communication sending record in association with the sending record identifier. This technical solution achieves the effect of real-time recording and storage of train-to-train communication data related to communication fault analysis during train operation.

Provided is an unmanned aerial vehicle for integrated acquisition of mobile communication reception quality data. The unmanned aerial vehicle according to an embodiment of the present invention comprises: an FC for controlling the flight of the unmanned aerial vehicle; and a plurality of mission computers, which acquire pieces of reception quality data of mobile communication services from different mobile communication companies so that each is transmitted to a data platform. Therefore, a plurality of pieces of mobile communication reception quality data can be divided and integrally acquired with merely one unmanned aerial vehicle, and the pieces of quality data can be simultaneously acquired at the same position.

The invention discloses an inter-satellite laser communication tracking integrated device and method, and relates to the technical field of laser communication. The device comprises a master control subsystem, a tracking subsystem, a light splitting isolation subsystem and a signal processing subsystem, and the tracking subsystem is used for performing phase shift processing on received signal light beams and outputting multiple paths of first light beams with consistent phases; the light splitting isolation subsystem is used for filtering each path of first light beam and outputting multiple paths of second light beams; the signal processing subsystem comprises a signal processing module, a communication module and a tracking module, the signal processing module mixes the local oscillator light beam and the second light beam and then generates multiple paths of second digital signals through multiple times of conversion, the second digital signals are divided into communication signals and tracking signals, and the communication module realizes communication receiving based on each path of communication signals. And the tracking module feeds back phase difference information between two adjacent paths of tracking signals to the master control subsystem. By adopting the device, stable communication with corresponding communication equipment can be realized.

The invention discloses a real-time FADEC operating system transplantation method which comprises the following steps: determining a selected hardware processor model and a specific operating system kernel according to FADEC control software performance requirements; the method comprises the following steps: dividing interfaces of an application software layer and an operating system layer in FADEC control software, and modifying an initial starting part code of operating system software according to a selected processor model and an operating system kernel, including adjusting operating system kernel codes of different processor chips and software and hardware configuration in an initialization process; based on the defined interface, packaging the driving equipment before transplantation; the initialization code and the packaging interface function are combined, transplanted operating system software is obtained, an application layer interface is not changed, and the development process of the FADEC control software is completed; debugging and verifying power-on initialization, signal input and output, communication receiving and sending, task allowance and an abnormal response mechanism, and judging whether requirements are met or not according to verification results; the demand tracing error rate is reduced, and the research and development efficiency is improved.

The invention discloses an end-to-end wireless communication scene-oriented encrypted semantic communication method, which comprises the following steps: constructing an encrypted semantic communication system, and carrying out system network training based on a preset network total loss function which is obtained based on a loss function of a communication receiving end and a loss function of an attacker network model. After network training is completed, original text information is mapped to high-dimensional vector representation to obtain an embedded vector, extracted semantic features and session keys are input into an encryption module to obtain a ciphertext message, and the ciphertext message is input into a channel encoder to generate a symbol stream transmitted on a wireless channel; and receiving a signal corresponding to the symbol stream by using a communication receiving end, and enabling the signal to sequentially pass through a channel decoder, a decryption module and a semantic decoder to obtain reconstructed original text information. According to the method, confidentiality protection can be provided for key semantic information transmitted by legal users on the premise that extraction and interaction of semantic features are not affected.

The application relates to a bit synchronization performance enhancement method for a non-continuous wave communication receiving link, which comprises the following steps: performing frame synchronization on a receiving signal frame to determine the starting position of a frame header sample point; performing frequency offset estimation based on the frame header sample point, and performing frequency offset compensation on the receiving signal frame according to the estimation result; embedding a set number of redundant sample points before the starting position of the frame header sample point of the receiving signal frame after the frequency offset compensation, and performing bit synchronization on the generated signal frame to obtain a processing signal frame; and removing the bit-synchronized redundant sample points from the processing signal frame to obtain a bit-synchronized receiving signal frame. The application can effectively solve the performance loss problem caused by the bit synchronization convergence process in the non-continuous wave scene, and greatly reduces the complexity of high-throughput satellite communication receiving.

This application relates to a low-speed satellite laser communication system and method, belonging to the field of laser communication technology. The low-speed satellite laser communication system includes an optomechanical unit and an electronic unit. The transceiver module of the optomechanical unit adopts a common aperture design. A single quadrant avalanche photodiode is placed at the focal plane of the common aperture optical antenna in the receiving optical path to convert the optical signal into four electrical signals. The signal detection module of the electronic unit is connected to the quadrant avalanche photodiode to preprocess the four electrical signals, separating the position detection signal and the communication signal. The main control communication module processes the communication signal to recover data and generates tracking commands based on the position detection signal. The fast-reflecting mirror in the optomechanical unit is controlled by a fast-reflecting mirror drive module. This application achieves both communication reception and precise tracking functions simultaneously using a single QAPD detector, significantly reducing the terminal size, weight, and power consumption, making it suitable for microsatellite platforms.

The present invention discloses a communication transmission control system for electric bicycles, the system includes: a data acquisition module for acquiring electric bicycle data; a data packet acquisition module for obtaining battery status data packets and update data packets; a status acquisition module for obtaining the connectivity index and communication reception rate of the electric bicycle according to the update data packet, and obtaining the networking status and communication transmission data of the electric bicycle and other vehicles; a communication rate acquisition module for obtaining the actual communication rate; a parameter calculation module for calculating the control variables, communication reception signal-to-noise ratio and signal-to-noise ratio variance of the corresponding electric bicycle according to the actual communication rate; an instruction acquisition module for constructing and training a reinforcement learning model, and determining the model output as a communication control instruction; and a vehicle-to-vehicle communication module for controlling the electric bicycle according to the communication control instruction to complete the communication. The system can realize high-efficiency communication transmission between electric bicycles.

The application discloses an inter-satellite laser communication and tracking integrated device and method, and relates to the technical field of laser communication.The device comprises a general control subsystem, a tracking subsystem, a light splitting and isolation subsystem and a signal processing subsystem.The tracking subsystem is used for performing phase shift processing on the received signal light beam and outputting a plurality of first light beams with consistent phases.The light splitting and isolation subsystem is used for performing filtering processing on the first light beams and outputting a plurality of second light beams.The signal processing subsystem comprises a signal processing module, a communication module and a tracking module.The signal processing module generates a plurality of second digital signals through multiple conversions after mixing the local light beam with the second light beam.The second digital signals are branched into communication signals and tracking signals.The communication module realizes communication reception based on the communication signals.The tracking module feeds back phase difference information between adjacent two tracking signals to the general control subsystem.The above device can realize stable communication with corresponding communication equipment.

This invention discloses a shortwave communication equalization method and system based on decision feedback iteration. Specifically, the transmitting end encodes, interleaves, and maps data information to generate multiple unknown data blocks. Known data sequences are interleaved and inserted between the unknown data blocks to form a data segment sequence, which is then transmitted to the receiving end via the channel. The receiving end extracts known data segments and sends them to a channel estimation module to estimate the channel impulse response. These segments, along with the extracted unknown data segments, are simultaneously sent to a first equalizer for segment-by-segment equalization, followed by LLR calculation, deinterleaving, and decoding. The decoding result is then determined to satisfy the iteration termination condition; if so, the iteration ends. Otherwise, the decoding result is encoded, interleaved, and mapped. The mapped result is divided into mapped segments, which are used as the initial values ​​for iteration and input to a second equalizer for segment-by-segment equalization. The LLR calculation, deinterleaving, and decoding process is then repeated until the iteration ends. This invention improves shortwave communication reception performance, has low computational complexity, and exhibits good numerical computation stability.

This application provides a satellite-based laser communication adjustment method, apparatus, electronic device, and medium, relating to the field of satellite communication technology. The satellite-based laser communication adjustment method provided by this application includes: acquiring a first position of a first target satellite and historical laser communication information of a second target satellite; determining the laser communication movement path corresponding to the second target satellite based on the historical laser communication information and the first position; acquiring the laser communication reception standard of the laser communication receiving terminal corresponding to the first target satellite; determining laser communication reception adjustment information corresponding to the first target satellite based on the laser communication movement path and the laser communication reception standard; and adjusting the receiving angle of the laser communication receiving terminal based on the laser communication reception adjustment information. This application can reduce the impact of satellite jitter on the stability of inter-satellite laser communication.

The present invention discloses a system and method for preventing mismatches in backup automatic starters at different voltage levels. The system comprises a high-voltage backup automatic starter and a low-voltage backup automatic starter. The high-voltage backup automatic starter comprises a timing mode conversion module and a communication transmission module, while the low-voltage backup automatic starter comprises a communication reception module and a timing mode adjustment module. Through information exchange between backup automatic starters at different voltage levels, synchronization of the timing modes of the program timers of the backup automatic starters at multiple different voltage levels is achieved. This solves the technical problem of some backup automatic starters preemptively operating after a system failure due to differences in the timing modes of the program timers of the backup automatic starters at multiple different voltage levels. This avoids confusion in the order of backup automatic starter operations after a system failure, achieves a multi-level backup automatic starter redundant configuration for load recovery, and improves system power supply reliability.

The invention discloses a laser communication and distance measurement integrated system based on frame synchronization, and belongs to the technical field of satellite laser communication. The problem that the ranging precision is limited under the condition that the communication rate is low is solved. The system comprises a sending end and a receiving end, the sending end comprises a synchronous head sequence generation module, a data sequence generation module and a framing module, and the receiving end comprises a synchronous sliding correlation / coarse ranging calculation module, a fine ranging calculation module and a data sequence extraction module. The synchronization head sequence generation module generates a synchronization head sequence, the data sequence generation module generates a data sequence, and the framing module completes assembly of the synchronization head sequence and the data sequence; the synchronous sliding correlation / coarse ranging calculation module carries out frame synchronization and calculates an integer code element period of transmission delay, the fine ranging calculation module calculates a small code element period of transmission delay, and the data sequence extraction module carries out frame splitting according to the initial position of a synchronous head sequence, extracts a data sequence and completes communication receiving.

The present invention discloses a radar communication integrated transmission method based on USRP, and relates to the field of signal processing. The present invention realizes the transmission and receiving process of radar communication integration based on USRP signal transmission module and USRP signal receiving module; when transmitting, first start the USRP transmission session, then configure the transmission parameters, load the radar communication integrated waveform, and use the USRP transmission waveform; when receiving, start the USRP reception session, configure the reception parameters, use the USRP reception waveform, if it is communication reception, perform communication reception processing and output the constellation diagram and communication data, if it is radar reception, perform radar reception processing and output the detection parameters and detection results. The present invention can be used for target perception detection and communication, and can add radar detection function to the system without losing communication performance.

The invention relates to the technical field of communication receiving, in particular to a multi-LED visible light communication receiving device and a dimming control method. The multi-LED visible light communication receiving device comprises a high-sensitivity photoelectric conversion module, a multiplexing module, a signal processing module, a decoding module, an anti-interference module and a synchronization module; by integrating an optical filter, an intelligent reflecting surface and a self-adaptive clock synchronization unit, the signal-to-noise ratio is remarkably improved, ambient light interference and inter-symbol interference are reduced, generalized dimming control and an asymmetric power distribution algorithm are adopted, collaborative optimization of brightness and communication performance is achieved, energy efficiency is improved, independent control of multiple paths of LEDs is supported, and different scene requirements are met; and the flexible receiving device supports curved surface installation, integrates a self-inspection and fault prediction module, triggers a maintenance instruction in advance, improves the stability of the system and prolongs the service life of the system.

Provided are a base station, whereby the erroneous detection of control information can be reduced, thereby preventing the degradation of the system throughput. A base station maps a downstream allocation control information unit, which is addressed to a terminal, to a first resource region, which can be used for any of a downstream control channel region and a downstream data channel region, or to a second resource region, which can be used only for the downstream control channel, so as to transmit the downstream allocation control information unit. In the base station, a control unit establishes a scale of the PDCCH region, and a transmission region establishing unit establishes, on the basis of a scale value established by the control unit, a mapping region to which the DCI is mapped within the R-PDCCH region and the PDCCH region.

The invention discloses an inter-train communication data processing method, device and equipment, a medium and a product. The method comprises the steps that in the running process of a current train, under the condition that first train-to-train communication data is received, receiving position information and a receiving timestamp of the current train are collected; collecting signal association information of the current train; determining a communication receiving record according to the first vehicle-to-vehicle communication data, the receiving timestamp, the receiving position information and the signal association information, and associatively storing the communication receiving record and a receiving record identifier; under the condition that to-be-sent second train-to-train communication data is obtained, sending position information and a sending timestamp of the current train are collected; and determining a communication sending record according to the second vehicle-to-vehicle communication data, the sending timestamp and the sending position information, and associatively storing the communication sending record and the sending record identifier. According to the technical scheme, the effect of recording and storing the train-train communication data related to communication fault analysis in real time in the train operation process is achieved.