123results about "GHz frequency transmission" patented technology

The invention provides a T2X satellite-ground cooperation-oriented image reconstruction method, device and equipment, and the method comprises the steps: adding a mask to a target region in an original image to obtain a mask image, and carrying out the feature extraction of the original image and the mask image, and obtaining a global feature and a mask feature; fusing the global feature and the mask feature in a channel dimension and a space dimension respectively, and fusing a fusion result from the channel dimension and the space dimension according to a fusion weight to obtain a hidden space representation of the original image; and quantizing the hidden space representation to obtain a quantized hidden space representation, encoding the quantized hidden space representation based on probability distribution generated by the entropy model, and sending the encoded quantized hidden space representation to a receiving end, so that the receiving end decodes the encoded quantized hidden space representation to obtain a reconstructed image. The original image is sparse through the mask, so that the sparsity of the extracted hidden space features is stronger, the data volume of the hidden space features is reduced, the local peak signal-to-noise ratio of the reconstructed image is improved under the constraint of the extremely low data volume, and the definition of the reconstructed image at the extremely low bit rate is improved.

The invention discloses a space-based telemetering transmission system for a carrier rocket, and relates to the technical field of rocket measurement and control communication, and the system comprises a rocket-borne network camera which is used for collecting video image data of a preset monitoring point position of the rocket, compressing the video image data, and outputting the compressed video image data as telemetering data; the telemetering transmission equipment is respectively connected with the rocket-borne network camera and the ground equipment, performs telemetering framing on the telemetering data, outputs first telemetering data and outputs second telemetering data to the ground equipment; the space-based power amplifier unit equipment is connected with the telemetering transmission equipment, receives the first telemetering data, amplifies the first telemetering data and then outputs the first telemetering data through radio frequency; the space-based telemetering antenna is connected with the space-based power amplifier unit equipment, receives the first telemetering data and then transmits the first telemetering data to a relay satellite, so that the satellite sends the first telemetering data to a ground measurement and control station; and the ground equipment is used for receiving the second telemetry data and then analyzing and uploading configuration parameter information. The problem that the coverage blind area of a telemetering system mainly based on ground-based measurement and control is large in the prior art is solved.

The invention provides a data processing method and device based on multiple satellites, electronic equipment and a medium, and relates to the technical field of satellite data processing. The data processing method based on multiple satellites comprises the following steps: acquiring a communication task of an initial satellite, and determining an image data processing standard and a target image data volume based on the communication task; determining a plurality of target resource consumptions based on the target image data volume and an image data processing standard; generating a plurality of data processing logics based on the image data processing criteria; and determining target satellites respectively corresponding to the plurality of data processing logics based on the plurality of target resource consumptions, sending the plurality of data processing logics to the respective corresponding target satellites, and sequentially sending the target images received by the initial satellite to the plurality of target satellites for processing based on the pre-processing logics and the post-processing logics. According to the method, the satellite self-processing efficiency of data can be improved while the data processing capability of the satellite can be improved.

The invention belongs to the technical field of remote sensing satellite ground station measurement, operation and control, and provides a low-orbit remote sensing satellite emergency system adopting a portable ground station and a control method in order to solve the technical problems that an existing fixed ground station is poor in maneuverability, low in timeliness and low in data transmission efficiency in an emergency task. The emergency system at least comprises a task planning part, a measurement and control and data receiving part, a data rapid processing part and a target identification part, the whole system is more focused on rapid task planning, and on-site real shooting and real transmission and on-site interpretation of an emergency shooting task can be realized; according to the low-orbit remote sensing satellite emergency system control method, the time from shooting to information processing does not exceed 15 minutes, so that the timeliness of an emergency task is greatly improved, and the time for receiving a task instruction, acquiring telemetering data, downloading code stream data and producing data by a remote sensing satellite is greatly shortened.

The present application relates to an image generation method and apparatus based on a Brownian bridge diffusion model, a device and a medium, wherein the method includes: receiving an image combination including a satellite image and a ground panoramic image; extracting shared features of the satellite image and the ground panoramic image; performing a polar coordinate transformation on the satellite image to obtain an initial latent vector of the satellite image and a latent vector of the ground panoramic image; gradually adding noise into the latent vector of the ground panoramic image to obtain a latent vector of the satellite image; gradually removing the noise in the latent vector of the satellite image to generate a target latent vector; and decoding the target latent vector to generate a target ground panoramic image. The efficiency and quality of conversion from the satellite image to the ground panoramic image are improved.

The invention discloses a resource allocation method and device, equipment, a storage medium and a product, and relates to the technical field of communication, and the method comprises the steps: obtaining a symbol rate and a historical demand bandwidth supported by a satellite terminal in response to a received login request of the satellite terminal; selecting or determining a candidate sub-band set from pre-divided sub-bands based on the symbol rate supported by the satellite terminal and the historical required bandwidth; respectively calculating discreteness indexes of corresponding spectrum utilization rates when the satellite terminal accesses each sub-band in the candidate sub-band set; and selecting or determining a target sub-band from the candidate sub-band set based on the discreteness index of the spectrum utilization rate, and allocating the target sub-band to the satellite terminal. According to the invention, the sub-band optimization is carried out according to the discreteness index of the corresponding spectrum utilization rate when the satellite terminal accesses each available sub-band, and the balanced distribution of base station resources is realized, so that the spectrum utilization rate of the base station is improved, the burden of the base station is reduced, and the use cost is reduced.

The invention discloses an image transmission method and system suitable for a geostationary orbit satellite. The method mainly comprises the following steps that (1) a sending end collects an image; (2) determining a target edge coordinate; (3) intelligent cutting; (4) encoding the cut image; (5) dynamic fragmentation processing; (6) sending the fragmented data to a receiving end; (7) the receiving end receives the fragmented data and recombines the fragmented data; and (8) the transmitting end retransmits the lost fragment data according to the lost fragment list. According to the technical scheme provided by the invention, through intelligent cutting, dynamic fragmentation and UDP transmission, the characteristics of high delay and limited bandwidth of satellites are adapted, redundant data transmission is reduced, the image transmission efficiency and reliability are improved, and the problems of low transmission efficiency and weak interference resistance of a traditional method are solved.

The invention provides a marine emergency information transmission method and system based on satellite communication. The method comprises the following steps: constructing a temporary special satellite communication link, and performing parameter optimization on the temporary special satellite communication link to obtain an optimized communication link; performing three-dimensional reconstruction on the field environment, analyzing the severity description of the illness state, predicting the illness state development, and generating an illness state prediction result; the distribution strategy of the special medical supplies is optimized by considering factors of weather changes and ocean current directions, and an optimal distribution path plan is obtained; performing pattern recognition and trend prediction, generating potential risk early warning, and forming updated medical requirements; and re-evaluating and optimizing the optimal distribution path plan, and generating an updated optimal distribution path plan. According to the technical scheme provided by the invention, the efficiency and accuracy of maritime first-aid response are improved, and medical supplies can be timely and accurately sent to a first-aid site.

The invention relates to the technical field of satellite communication, and discloses an efficient encoding and decoding and distribution transmission method for satellite image data, which comprises the following steps of: acquiring satellite epoch parameters, estimating a downlink channel capacity sequence, decomposing the image data into a basic feature code stream and a background residual code stream, and distributing a transmission priority, and mapping the basic feature code stream to the most significant bit of the modulation symbol, mapping the background residual code stream to the least significant bit of the modulation symbol, and implementing nonlinear displacement stretching on the coordinate of the constellation point where the modulation symbol is located according to the carrier frequency shift change rate. A core semantic bit phase tolerance boundary is expanded by compressing a background data judgment space, high-fidelity transmission of key image features in a severe phase distortion environment is ensured, and the information transparent transmission capacity in a high-dynamic link is improved.

The invention relates to the technical field of meteorological data management, and particularly discloses a meteorological data management system and method based on multi-source data collaboration, and the system comprises an automatic open source data downloading module, an automatic sunflower satellite ground data receiving and processing module, and an automatic satellite cloud picture shooting planning module. The OBS storage module is used for storing information and is connected with other modules; the satellite cloud picture data automatic processing module is used for inquiring corresponding meteorological information in the OBS storage module according to the information in the cloud picture data, and automatically assigning and filing meteorological elements; and the satellite cloud picture data automatic processing module is connected with the satellite cloud picture shooting automatic planning module. According to the invention, advanced technical achievements in the fields of meteorology, information technology, database technology, data processing and the like are deeply fused, and a highly integrated and intelligent meteorological data management platform is constructed.

The invention discloses a video transmission method and device based on Lyapunov optimization, electronic equipment and a storage medium. The method is applied to satellite node ends. The method comprises the following steps: acquiring initial state information of a current transmission time slot and video data to be transmitted; the initial state information comprises queue state information representing a coding environment and transmission state information representing a transmission environment; inputting the initial state information into a preset strategy action model to obtain action control parameters corresponding to the initial state information; and coding and transmitting the video data to be transmitted according to the action control parameters. Therefore, compared with the prior art that the video to be transmitted is coded and transmitted by adopting the preset fixed configuration parameters, the action control parameters output by the strategy action model dynamically adapt to the coding environment and the transmission environment of the satellite node end; the satellite node end encodes and transmits the video data to be transmitted according to the action control parameters, so that the video quality is better, and the transmission effect is better.

This application provides an image reconstruction method, apparatus, and device for T2X satellite-ground collaboration. The method involves adding a mask to the target region of the original image to obtain a mask image. Feature extraction is performed on both the original image and the mask image to obtain global features and mask features, respectively. The global features and mask features are fused in the channel dimension and spatial dimension, respectively. The fusion results are then fused in the channel and spatial dimensions according to fusion weights to obtain the latent space representation of the original image. The latent space representation is quantized to obtain a quantized latent space representation. This quantized latent space representation is encoded based on a probability distribution generated by an entropy model and sent to the receiving end for decoding to obtain the reconstructed image. By using a mask to sparsify the original image, the sparsity of the extracted latent space features is enhanced, reducing the amount of latent space feature data. This improves the local peak signal-to-noise ratio of the reconstructed image under extremely low data constraints, thereby enhancing the clarity of the reconstructed image at extremely low bit rates.

The invention provides a low earth orbit satellite network video code rate determination method and device and electronic equipment. The method comprises the following steps: acquiring link state information of a low earth orbit satellite network link; predicting whether a link reconstruction event occurs at the next moment based on the link state information; and under the condition of predicting that a link reconstruction event occurs in the low earth orbit satellite network link at the next moment, dividing a time domain into independent control intervals, and independently determining the video block code rate at the next moment based on the network state of the independent control interval in each independent control interval. According to the method, the satellite network reconstruction event is predicted, and the video code rate is independently determined in the interval mode in the reconstruction event period, so that the video live broadcast experience quality in the low-orbit satellite network environment is improved.

The utility model relates to the technical field of communication, and discloses a multi-mode wireless video return device, comprising a housing, a transmission assembly fixedly connected to the outside of the housing and used for returning video data, four connecting shafts detachably connected to the bottom of the housing, and rotating balls rotatably connected to the bottoms of the four connecting shafts. The bottom of the rotating ball is fixedly connected with a supporting shaft, the outer portion of the supporting shaft is slidably connected with a plurality of sliding shafts, the rotating ball is fixedly connected to the bottom of the supporting shaft, and the bottom of the rotating ball is rotatably connected with a fixing seat. According to the device, when a device fixing environment vibrates, the fixing base is fixed in the environment and moves along with the environment, due to the existence of the rotating ball, the rotating ball and the supporting shaft connected with the rotating ball can rotate in a self-adaptive mode when the fixing base moves, and it is guaranteed that the device does not incline after the supporting shaft rotates through the multiple sliding shafts; therefore, the shock insulation effect is achieved.

The invention discloses a multifunctional sonar display and control device. The device mainly comprises a hardware control layer and a sonar display layer, wherein the hardware control layer comprises a plurality of display screens which work cooperatively; the data communication layer is used for high-speed data exchange between display control software and a hardware platform; the data processing layer adopts a modular design and configures corresponding processing flows according to different functional modules; the user interface layer is a graphical interface used for parameter setting, data visualization and file storage functions; a multi-view collaborative display technology is adopted, and various sonar data are displayed at the same time. By means of software and hardware collaborative design and multi-level optimization, the device achieves high integration of various functions, is high in real-time performance and convenient to operate, effectively solves various technical problems existing in an existing sonar display and control system, and has good application prospects.

The utility model discloses a display connection structure and a display device, and relates to the technical field of display, the display connection structure comprises a plurality of display box bodies arranged in a matrix, and each display box body is provided with a wireless module; and the display box body is wirelessly connected with the wireless modules of other display box bodies through the wireless module. The wireless modules are arranged on the display box bodies, and the wireless connection between the display box bodies is established based on the arranged wireless modules, so that the problem that the maintenance cost is high due to the fact that the wired connection established by a cable or a connector conventionally needs to be frequently and regularly maintained is solved; and meanwhile, the laying of the cable or the connector is avoided in a wireless connection mode, so that the cable or the connector does not need to be identified and avoided during later maintenance, and the difficulty of later maintenance is further reduced.

Provided is a surveillance system, including: a trailer having wheels, a mast, and a trailer towing coupler; a camera coupled to the mast; a cellular modem communicatively coupled to the camera and operative to transmit video captured by the camera; a command center server operative to remotely receive and store data describing operation of a fluid-handling device and to receive the transmitted video and send the video to a user in response to a request from a web browser of the user; a power storage device; and a solar panel coupled to the power storage device such that the solar panel charges the power storage device.

The invention discloses a low-orbit satellite video conference secure transmission method and system based on a rolling key chain and an ABE, electronic equipment and a storage medium, and belongs to the crossing field of satellite communication and information security, and the method comprises the following steps: S1, a ground terminal system carries out encryption and uplink transmission on a video stream; s2, processing uplink data by the satellite network relay and video service system; and S3, distributing the multicast encrypted data of the satellite network. The method improves the transmission efficiency and safety, and is especially suitable for a low-orbit satellite network scene.

There is provided apparatus and a method for providing data for a plurality of television and / or radio channels to a plurality of users. One or more data feeds can be received from the same or different transmission systems such as satellite broadcast and a distribution network is provided to distribute the data to a plurality of user locations allowing a user at each of the user locations to independently select to receive data for one or more channels at their location. The apparatus and method relates to the selective formation of a distribution unit such as a GTU by connecting a first data feed to a base modular unit in which the data is combined so as to be available from a plurality of output connection ports on the base modular unit to the plurality of users. The base modular unit includes a plurality of input connection ports for the selective connection to output ports of a further modular unit with a further data feed and so on with further modular units until apparatus of the required capacity is formed, with data from all of the data feeds being available from the output ports of the base modular units to all of the users connected thereto.

The application provides a multi-satellite-based data processing method and device, electronic equipment and medium, and relates to the technical field of satellite data processing. The multi-satellite-based data processing method comprises the following steps: obtaining a communication task of an initial satellite, and determining an image data processing standard and a target image data volume based on the communication task; determining a plurality of target resource consumptions based on the target image data volume and the image data processing standard; generating a plurality of data processing logics based on the image data processing standard; determining target satellites corresponding to the plurality of data processing logics based on the plurality of target resource consumptions, and sending the plurality of data processing logics to the target satellites corresponding thereto, respectively; and sending target images received by the initial satellite to the plurality of target satellites for processing in sequence based on the pre-processing logic and the post-processing logic. The application can improve the data processing capacity of the satellite and improve the efficiency of satellite self-processing for data.

The present invention belongs to the field of signal transmission technology, and specifically relates to a real-time transmission method for a mobile satellite communication station. The method comprises: for a sequence of all pixels in image data to be transmitted, taking the difference between the grayscale value of each pixel and its previous pixel as the forward grayscale difference of each pixel, obtaining the preferred node and optimizable pixel of each forward grayscale difference, calculating the compression contribution of each forward grayscale difference based on the difference between the coding length of the grayscale values ​​of all optimizable pixels and the coding length of the preferred node, selecting a target grayscale difference from all forward grayscale differences with a compression contribution greater than 0, and performing compression coding on the optimizable pixel and other pixels of the target grayscale difference by coding the preferred node and grayscale value of the target grayscale difference, obtaining a compression coding result of the image data, and transmitting the result. The present invention improves transmission efficiency and real-time performance.

The embodiment of the invention discloses an image semantic coding method based on information value, relates to the technical field of communication, and can improve the information effectiveness of coding content. The method comprises the following steps: determining mutual information between each to-be-transmitted image and an image successfully received by a receiving end at the previous moment as an information value of each to-be-transmitted image at the current moment; determining the transmission priority of each to-be-transmitted image according to the information value of each to-be-transmitted image at the current moment, and selecting a to-be-coded image at the current moment from each to-be-transmitted image according to the transmission priority; determining a target quantization factor of the to-be-coded image by using a pre-trained transmission strategy optimizer and taking maximization of the average information value of the image transmitted by the sending end as an optimization target; and encoding the to-be-encoded image into a bit stream conforming to a code rate corresponding to the target quantization factor based on QVRF quantization and arithmetic encoding by using a pre-trained image semantic encoder.

The invention discloses a 5G satellite television multimode frequency division multiplexing antenna which comprises a multi-signal mixing unit, and a live broadcast television satellite signal processing unit, a Beidou satellite signal processing unit and a 4G / 5G network signal processing unit which are electrically connected with the multi-signal mixing unit. Wherein the live television satellite signal processing unit is used for acquiring a satellite first intermediate frequency signal; the Beidou satellite signal processing unit is used for acquiring a satellite positioning signal; the 4G / 5G network signal processing unit is used for acquiring a 4G / 5G network signal; and the multi-signal mixing unit mixes the satellite first intermediate frequency signal, the satellite positioning signal and the 4G / 5G network signal, and transmits the mixed signal to a terminal receiving device through a coaxial cable. The 5G satellite television multimode frequency division multiplexing antenna can become a multi-signal receiving device, and has the advantages of being convenient to install, exquisite in appearance, low in comprehensive cost and high in signal quality.

The utility model relates to the technical field of satellite switches, in particular to a five-in twelve-out die casting satellite control switch which comprises a switch body, clamping sleeves are clamped on the left side and the right side of the switch body, an input connector is fixedly connected to one side of the switch body, and an output connector is fixedly connected to one side, close to the input connector, of the switch body. According to the utility model, the indicating lamp is arranged, one side of the top of the switch body close to the input connector is fixedly connected with the first fixing strip, one side of the top of the switch body close to the output connector is fixedly connected with the second fixing strip, one side of the inclined plane is fixedly connected with the indicating lamp, and the two fixing strips correspond to the input connector and the output connector. Each indicating lamp is provided with a corresponding connector, the indicating lamps can be lightened by turning on the power switch in an environment with weak light, and the indicating lamps can be numbers or marks, so that a worker can conveniently connect the indicating lamps, and the purpose of convenient use is achieved.

The invention belongs to the technical field of special vehicles, and particularly relates to a motorized communication command vehicle which is characterized by comprising a vehicle carrying platform subsystem which comprises a vehicle refitting part and a vehicle chassis; the electronic information subsystem comprises an image system and is used for realizing real-time acquisition of field images and environment information; the voice communication system is used for interconnecting and intercommunicating the voice subsystems; the video conference system realizes a real-time conference demand function; the multimedia system is used for connecting all devices in the vehicle through the centralized control system; the communication-in-moving system is provided with a communication-in-moving antenna, and real-time image and audio information is accessed to a fire fighting network through establishment of a satellite link; the comprehensive guarantee subsystem comprises a power supply system and an environment guarantee system; a safety system includes an installed electrical safety device and a protective device. According to the invention, monitoring and command communication of large-scale events and activity sites can be guaranteed, and a mobile monitoring and command center is constructed.

A space-ground integrated satellite communication network system suitable for remote surgery, which relates to the field of satellite communication. It solves the deficiencies of existing medium and high-orbit satellites, such as high latency, large jitter, and easy congestion. The system includes: a remote surgery operation console module, which is used to connect the transceiver data of the remote surgery operation console module to the remote small station of the high-orbit satellite system through a dedicated line; a satellite communication module, which is used to manage the communication connection between the remote small station of satellite communication and the ground network; a cloud server forwarding module, which is used to forward data between the gateway and the robot, confirm the network address where the destination hospital is located, and reach the 5G CPE device at the hospital through a wireless or wired network; the surgical robot module receives the instruction data of the remote surgery operation console module in real time, and at the same time sends the response data of the surgical robot module to the remote surgery operation console module in real time, realizing remote data interaction between the remote surgery operation console module and the surgical robot.

The invention discloses a video stream transmission method for a network-free region based on air-space cooperation, and mainly solves the problem that videos are difficult to collect and transmit in a region without base station coverage or a region with a damaged ground network. Comprising the following steps: 1) constructing an air-space integrated communication system consisting of a satellite, an unmanned aerial vehicle and a user; 2) the user side predicts the demand according to the historical data and uploads the demand to the satellite side; 3) the satellite end performs intention recognition and matches a corresponding DQN reinforcement learning template; 4) constructing a user quality of experience QOE model according to the transmission time delay and the state of the video buffer area; 5) the satellite end adopts the DQN template to adjust a video stream transmission strategy in real time according to the QOE model, and transmits the video blocks to the user end; and 6) the user side receives the video blocks and plays the video blocks in real time. According to the method, subjective preference requirements and objective video requirements of the user are predicted and recognized, a resource allocation strategy is dynamically formulated by adopting a reinforcement learning algorithm, communication resources in the system are fully utilized, consumption of the communication resources is reduced, and the method can be used for video stream transmission service in an air-space integrated communication system.

The invention discloses a method and a system for searching programs through Beidou positioning of a direct broadcast satellite receiver, and relates to direct broadcast satellite receiving equipment, a broadcast control system is deployed at the front end of the direct broadcast satellite receiver, a Beidou positioning system is deployed at the same time, and a Beidou positioning descriptor is added in a descriptor of a network information table NIT of the broadcast control system; the Beidou positioning system obtains Beidou values of all the direct broadcast satellite receivers, and grouping of the direct broadcast satellite receivers in different areas is achieved through the Beidou values; when channel searching needs to be triggered for the program stream of the specified direct broadcast satellite receiver, only the version number of the Beidou update descriptor of the direct broadcast satellite receiver under the specified Beidou value needs to be updated, and when the direct broadcast satellite receiver monitors that the version number of the Beidou positioning descriptor changes, automatic program searching is triggered. Through the service descriptor and the Beidou positioning descriptor which are operated in parallel, automatic channel searching in the whole network is realized or automatic channel searching is only triggered for a satellite live broadcast receiver in a specified area.

The present invention belongs to the field of spaceborne heterogeneous video compression technology, and particularly relates to a spaceborne heterogeneous H.264 video compression encoding system and an encoding method. The system is implemented based on domestic CPU and GPU, and includes a spaceborne heterogeneous parallel forward encoding subsystem and a parallel acceleration backward reconstruction subsystem. Among them, the spaceborne heterogeneous parallel forward encoding subsystem is used to combine the reconstructed images output by the parallel acceleration backward reconstruction subsystem, and perform macroblock-level parallel intra-frame prediction and inter-frame prediction on the video image sequence obtained in real time by the spaceborne high-resolution imaging device frame by frame according to a new "Zigzag" scanning order. After macroblock-level parallel DCT transformation, macroblock-level parallel quantization and encoding, a compressed bitstream is obtained. The parallel acceleration backward reconstruction subsystem is used to perform macroblock-level parallel inverse quantization and macroblock-level parallel inverse DCT transformation on the coefficient data block after macroblock-level parallel quantization to obtain a residual data block, and then obtain a reconstructed image through macroblock-level parallel loop filtering.

The invention discloses a hollow isolation type signal receiver, and belongs to the technical field of satellite communication receiving equipment.The signal receiver comprises a base and a vertical column fixedly installed on the base, a satellite pot is hinged to the vertical column, a tripod is fixedly installed on the reflecting surface of the satellite pot, and a base is fixedly installed on the side, away from the satellite pot, of the tripod; a micro tuner is fixedly mounted at the upper end of the base, an isolation mechanism is arranged on the base, a bird repeller is hinged to the base, and the isolation mechanism comprises a calibration ring fixedly mounted at the upper end of the base; when birds attempt to stay on a pot surface or a tripod, the anti-bird thorns perform physical blocking firstly, if the birds still stay, the microcontroller in the control box starts the servo motor to drive the bird repeller to rotate, the rotating light reflecting box generates flickering light spots, the bell makes a sound, and three-dimensional deterrence is formed. And signal receiving is prevented from being affected by excrement or nesting due to the fact that the birds frequently fall on the satellite pot.