Safe alternate iteration method in unmanned aerial vehicle auxiliary direction modulation network

Abstract

The invention provides a safe alternate iteration method based on beam forming and power distribution in an unmanned aerial vehicle auxiliary direction modulation network. For the problem of how to dynamically adjust power distribution in the flight process of the unmanned aerial vehicle, a maximum signal to noise ratio and a maximum artificial noise ratio are introduced, and a beam forming vectorand an artificial noise projection matrix are dynamically designed along with the flight of the unmanned aerial vehicle. For each fixed time interval in the flight process of the unmanned aerial vehicle, the optimal power distribution strategy can be obtained through alternate iteration of a beam forming vector, an artificial noise projection matrix and a power distribution factor based on the maximum safety rate. Compared with fixed power distribution, the proposed alternate iteration structure can obtain higher safety rate performance gain, and particularly, the safety rate performance is greatly improved under the condition of a small-scale antenna.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a safe alternate iterative structure between beamforming and power distribution in a UAV-assisted direction modulation network. Background technique [0002] In recent years, drones have attracted widespread attention in the field of wireless communication due to their advantages of high mobility, flexible deployment and low cost. The rapid development of drone-assisted communication networks has brought great benefits to people's work and life. convenient. Due to the broadcast nature of wireless signals, the problem of secure wireless transmission in drone networks is and will be a very challenging problem at present and in the future. In addition to the traditional upper-layer encryption technology, physical layer security has been widely and deeply studied in wireless networks in the past ten years, and wireless transmission with physical layer security provide...

AI Technical Summary

Problems solved by technology

[0003] Directional modulation technology has become a key physical layer security technology in wireless communication in recent years. It is characterized by the ability to send useful signals to the specified desired direction to ensure that legitimate users can effectively receive useful information from the transmitter. , while distorting the constellation diagram of the useful signal in other undesired directions, so that illegal eavesdropping users cannot recover the useful signal

In order to further ensure communication security, artificial noise is usually used to reduce the performance of eavesdropping channels. The transmitter sends artificial noise while sending useful signals, and illegal eavesdropping users receive artificial noise signals while receiving useful signals, which makes eavesdropping users more Difficult to recover confidential information transmitted by the transmitter

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