A communication method for unmanned aerial vehicles with dual systems of communication and ranging

Abstract

The invention discloses a communication method for an unmanned aerial vehicle with dual systems of communication and ranging, and belongs to the technical field of wireless communication of the Internet of Things. The method uses a dual communication system to perform data communication and distance measurement at the same time. The distance measuring party monitors the communication quality at all times and takes over in time when the communication party shows signs of loss of control. Combined with the distance measurement value, RSSI value, and frame error rate, the three modulation methods of LoRa, FLRC, and GFSK are adaptively selected to maximize the transmission rate while ensuring that the frame error rate is lower than the target value. Use a random channel selection algorithm for frequency hopping, and the frequency hopping pattern is evenly distributed in the 2.4G ISM frequency band, effectively improving the anti-interference performance. The invention adds a distance measurement function on the basis of communication, provides reliable distance reference information for ground stations, and also provides a backup communication solution for out-of-control situations, adding reliable protection for the safe flight of UAVs, and using self-adaptive multi-mode selection at the same time Algorithm and random channel selection algorithm significantly improve the effectiveness and reliability of the system.

Description

technical field [0001] The invention relates to a communication method for an unmanned aerial vehicle with dual systems of communication and ranging, supplemented with an adaptive multi-standard selection algorithm and a random channel selection algorithm to improve the transmission rate and anti-interference performance of the system, and belongs to the technical field of wireless communication of the Internet of Things. Background technique [0002] In recent years, small drones have been applied in many fields relying on their small size, strong mobility, and quick deployment. As an important part of UAV system, flexible and reliable communication system has attracted more and more research scholars' attention. Under the unique air-to-ground propagation channel model of UAVs, it is a big challenge to realize real-time communication between UAV pilots or ground stations and UAV platforms in the air and to complete stable data interaction and security control. [0003] In ...

AI Technical Summary

Problems solved by technology

[0003] In the face of diverse civilian scenarios such as logistics distribution, agricultural and forestry operations, inspection security, and geographic exploration, the current wireless transmission technologies such as WiFi, ZigBee, and Bluetooth in the ISM2.4GHz frequency band cannot meet the coverage requirements of 300 meters to 2,000 meters and cannot be effective. Resists the Doppler effect caused by drones moving at speeds up to 160km / h, and is extremely susceptible to interference from signals in the same frequency band

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