A rate adaptive method, device and system for unmanned aerial vehicle mu-mimo

Abstract

The invention discloses a rate adaptive method, device and system of unmanned aerial vehicle MU‑MIMO, belonging to the field of unmanned aerial vehicle wireless communication. The present invention reliably predicts the phase difference by analyzing the phase difference of the signal under the influence of mutual enhancement and mutual weakening of the direct path and the reflection path caused by multipath fading with the unmanned aerial vehicle or vertical flight or horizontal flight conditions; the present invention is aimed at unmanned Based on the high dynamic flight conditions of the UAV, the fading frequency is predicted, combined with the historical measurement trajectory of CSI, the undisturbed signal-to-noise ratio can be reliably predicted in the future, and then the signal-to-noise ratio value under the influence of inter-user interference can be reliably predicted, which overcomes the high dynamic flight condition of the UAV. The down-channel measurement is easily outdated, which ensures the autonomous adjustment of the transmission rate when the UAV communicates with multiple users to adapt to the violently fluctuating UAV channel.

Description

technical field [0001] The invention belongs to the field of unmanned aerial vehicle wireless communication, and more specifically relates to a rate adaptive method, device and system of unmanned aerial vehicle MU-MIMO. Background technique [0002] As global network coverage and user communication traffic demands increase, a key feature of next-generation communication systems is the seamless cooperation between terrestrial and non-terrestrial communication facilities. Traditional terrestrial cellular base stations are used to provide basic coverage of terrestrial areas. However, in urban areas with dense hotspots, or in the case of limited basic communication facilities in disaster areas, when the ground base station is difficult to meet the communication needs of users, UAVs rely on their high flexibility, easy deployment and wide adaptability to environmental changes. It provides ground users with emergency, low-cost, specialized wireless network and business offloading...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a rate adaptive method, device and system for UAV MU-MIMO. , resulting in an error in the selection of the transmission rate, resulting in an increase in the bit error rate, and ultimately a technical problem of a decrease in throughput

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