Unmanned aerial vehicle air-ground broadband communication link method based on narrowband beam directional antenna

Abstract

The invention discloses an unmanned aerial vehicle air-ground broadband communication link method based on a narrowband beam directional antenna. The unmanned aerial vehicle air-ground broadband communication link method comprises an initial link building stage: ensuring that an unmanned aerial vehicle can quickly perform handshake signaling with a ground station after flying to the sky and aftera communication device starts working so as to achieve the distance measurement of the both parties, time reference synchronization and mutual alignment of the antennas to achieve the initial buildingof a communication link; and a communication stage: the objective of the communication stage is to ensure the high-speed and reliable transmission of communication data between the unmanned aerial vehicle and the ground station, because the protocol contents are divided into two parts, one part is that the nodes of the both parties periodically perform time reference correction and antenna alignment real-time adjustment, and the second part is a channel access mechanism during the data transmission. By adoption of the unmanned aerial vehicle air-ground broadband communication link method, theunmanned aerial vehicle can quickly establish the link with the ground station after flying to the sky, and the real-time correction and alignment of the directional antennas in the flight process can be ensured, and rapid automatic recovery ability after the interruption of the like due to the abnormal maneuverability of the unmanned aerial vehicle is available.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to an aircraft-ground-air broadband communication link method based on a narrowband beam directional antenna. Background technique [0002] The communication between air vehicles and ground stations is constantly improving the link rate requirements. The traditional communication system based on omnidirectional antennas cannot meet the needs of long-distance broadband high-speed communication due to the low antenna gain; while the communication system based on satellite relay The signal bandwidth of communication support means is limited, and the rental fee is expensive, so it is very important to provide a new and relatively cheap broadband communication support means for aircraft. [0003] Frequency resources in lower frequency bands have been basically divided up by various types of communication systems due to their better fading characteristics in wireless cha...

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Problems solved by technology

[0004] Due to the high maneuverability of the aircraft, the communication distance between the ground and the air often needs to be on the order of hundreds of kilometers. Traditional omnidirectional antennas have low gain and cannot meet the broadband communication requirements of this distance.

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