11results about "GHz frequency transmission" patented technology

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 application provides a satellite communication-based image enhancement method, system, device and medium, wherein the method comprises: in-bucket sorting of time bucket grouping data to obtain sorted time bucket data; based on a trigger processing water line and a forced processing water line of a dynamic buffer, performing handover condition detection on the sorted time bucket data, and when the handover condition is met, handing over the sorted time bucket data to a preset image processing unit to obtain reorganized image data; performing content-aware error concealment on a missing area in the reorganized image data to obtain a concealed and repaired image; and performing lightweight deep learning model optimization on the concealed and repaired image to obtain an enhanced final image, so as to achieve the technical effects of improving key frame recovery success rate, optimizing bandwidth utilization, reducing end-to-end processing delay, reducing memory occupation, and improving image visual quality.

The application provides a kind of spaceborne super high speed image intelligent processing method and device, including: high speed data interface unit, intelligent image processing unit, main control unit;The high speed data interface unit is connected respectively external data input unit, intelligent image processing unit and main control unit.This application keeps original data on front end FPGA, GPU module is only used as the position calculation of slice, avoids the repeated transmission of internal mass data, so as to cause the pressure of transmission bandwidth.

The application relates to a DVB-S2 satellite signal adaptive carrier synchronization method under low signal-to-noise ratio, which comprises the following steps: 1) pilot correlation peak recognizable judgment; 2) pilot intra-carrier synchronization under the condition of recognizable correlation peaks; 3) pilot inter-carrier synchronization under the condition of recognizable correlation peaks; 4) determining a possible frequency offset range under the condition of unrecognizable correlation peaks; and 5) searching and determining a nearest frequency offset estimation value according to a step under the condition of unrecognizable correlation peaks. The method provided by the application can realize DVB-S2 satellite signal carrier synchronization under the condition of large Doppler frequency offset and low signal-to-noise ratio, and has good practical value.

The application provides a broadband satellite direct connection portable command box, which comprises a portable command box body, a portable command box main body module, a portable command box top cover, a portable command box operation panel and a satellite communication antenna panel; the main body module comprises a satellite transmitting and receiving module, a network gateway, an application service module, a WIFI service module and a self-organizing network service module. The broadband satellite direct connection portable command box is a portable command box containing broadband satellite communication, which inherits the characteristics of lightness, small size and convenient operation of the portable command box. Meanwhile, with the global coverage characteristics of satellite communication, the on-site portable command box can communicate with the superior command center network through the satellite link even if there is no ground network, so as to realize the voice, video and data intercommunication between the on-site and the rear command center and the front and rear command linkage.

An optical remote sensing satellite task planning method, comprising the steps of: (1) determining the time of satellite subsatellite point entering and leaving the ground sunlit area to obtain the satellite's imageable period; (2) according to the satellite's imaging service area and the result of step (1), performing imaging task planning to determine the on-off time of the satellite remote sensing camera; (3) the satellite remote sensing camera performs imaging to obtain imaging data; (4) after the imaging task is completed, performing data storage processing, and storing the processed result as effective data on the satellite; (5) based on the result of step (4), performing data transmission task planning to determine the data to be transmitted; (6) transmitting the data to be transmitted. The method greatly improves the automation degree of optical remote sensing satellite task planning, and further improves the application efficiency of the optical remote sensing satellite.

A kind of remote sensing satellite real shooting real transmission feasible area analysis method.Belongs to satellite task planning and data transmission capacity analysis technical field.Can quickly calculate the area range of the ground station surrounding that can be executed real shooting real transmission under the condition of given imaging time and satellite state, suitable for task rapid adjustment and emergency response scene.Through directly constructing area boundary and outputting in polygon form, avoid analyzing a large number of discrete ground points one by one, significantly reduce the calculation complexity.Analysis process is based on clear geometric and time constraint calculation, has good program implementation conditions, is convenient for embedding into existing satellite task planning and management system.Get rid of the dependence on third-party commercial simulation software, improve the system autonomous controllable ability, reduce deployment and operation cost.Analysis result is output in polygon area form, is convenient for visual display, spatial analysis and data interaction with other task planning modules.

The invention relates to the technical field of satellite communication, and discloses an intelligent satellite television antenna and a control system thereof, and the antenna comprises an outer cover, a mounting seat, a double-shaft rotating stand and an antenna body. The inertial measurement module is mounted on the rotating stand, and the main control module is fixed on the mounting seat. The main control module is configured to execute motion decoupling logic, and the yaw angular velocity of the carrier is separated by calculating the difference between the compound angular velocity measured by the inertia measurement module and the mechanical rotating speed fed back by the azimuth encoder; and compensating a mechanical angle difference value in a satellite capturing period by using a carrier rotation component obtained by integrating the yaw angular velocity so as to obtain a real relative azimuth angle of the target satellite in a geographic space. The self-adaptive variable-speed scanning and frequency drift correction technology is also combined, and accurate removal of carrier motion interference and high-precision autonomous satellite finding and attitude calculation are realized without external navigation and magnetic compass assistance.

The application discloses a kind of on-orbit screening and compression method and device of remote sensing data based on intelligent computing on satellite, belong to remote sensing satellite data processing and data compression technical field.The method is by deploying lightweight AI model on satellite, first, the image quality of complete one scene remote sensing data is evaluated, and the data of which quality is not available is removed according to it;For the scene data of which quality is qualified, further content understanding and value evaluation are carried out, and the whole scene data of which content is not valuable is directly removed according to it;For the effective scene data of which content is valuable, then part block is carried out in scene, and different data blocks are implemented differentiated compression according to value distribution information;Finally, all compression blocks and scene level index table recording its position and compression parameters are packaged as complete data product and downloaded.The application realizes intelligent hierarchical processing of on-orbit data through configurable quality and value standards, and maximizes satellite-ground transmission efficiency under the premise of guaranteeing data availability and value density.