UAV one-station multi-machine data link technology refers to the data link communication between a measurement and control station (ship/ground or air) and multiple UAVs. It uses frequency division, time division and code division multiple access to distinguish different from different. Telemetry parameters and mission sensor information for drones. It simplifies the equipment quantity of the ground control station, and can control multiple UAVs by using one measurement and control station; improves the interoperability of the system, enables the UAV to achieve multi-machine multi-system compatibility and collaborative work, and improves the UAV measurement and control system. Use efficiency. The main research directions include:
(1) Research on data transmission link protocol.
The universalization and interoperability of UAVs must first be realized at the physical layer, that is, the versatility of data links, including the unification of measurement and control communication systems such as frequency bands, signal formats, and data formats. This is the basis for all interconnection and interoperability. . In 1991, the US military identified the General Data Link (CDL) as the ISR broadband data link standard and issued the "CDL Waveform Specification", which was subsequently approved by other NATO member states and based on this specification. The first edition of the NATO Image System Interoperability Data Link Standard STANAG AR 7085 was released in January, and the second edition of the standard was released in January 2004. In order to achieve interoperability between data link terminals, images and management data sent from the air can be distributed through ground/marine command, control and link management data terminals as needed. It is necessary to accurately describe the number of broadband bursts required for interoperability. General technical requirements such as overall requirements, system function models, interfaces and their characteristics, confidentiality requirements, link management, and communication protocols, to improve system generalization, serialization, standardization, and modularization.
(2) "One station multi-machine" high-speed data transmission technology. In addition to the above-mentioned high-rate data transmission technology, if the range of action is far, the measurement and control station needs to use a directional tracking antenna with a higher gain. When the antenna beam cannot cover multiple UAVs at the same time, multiple antennas or multiple beams are used. antenna. When the mission sensor information transmission is not required, the measurement and control station generally adopts an omnidirectional antenna or a wide beam antenna. When multiple drones are out of line of sight, relaying is required. According to different relay modes, it is divided into an air relay one-station multi-machine data link and a satellite relay one-station multi-machine data link.
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