Physical layer active monitoring method for non-orthogonal multiple access system

Abstract

The invention discloses a physical layer active monitoring method for a non-orthogonal multiple access system. A power domain non-orthogonal multiple access method is adopted for transmission. After each suspicious receiver module receives the composite signal, the suspicious receiver module carries out detection according to a serial interference elimination mode; the active monitor module worksin a full-duplex mode, and sends an interference signal to the suspicious receiver module while receiving the composite signal; after receiving the interference signal, the suspicious receiver modulechanges the sending rate of the suspicious sender module; the active monitor module detects the received composite signal by adopting a serial interference elimination method; the average monitoring and rate is calculated, the optimization problem is established, the maximum average monitoring and rate is obtained by adjusting the interference power sent by the active monitor module, the monitoring effect better than that of passive monitoring is obtained by controlling the sending power of the active monitor, and the safety of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a physical layer active monitoring method for a non-orthogonal multiple access system. Background technique [0002] With the vigorous development of information technology in modern society, the requirements for the quality of information transmission are getting higher and higher. As we all know, communication quality is mainly measured from the aspects of effectiveness and reliability. In addition, security is also an important measure. Security is the characterization of the system's anti-interference ability in the face of man-made sabotage and threats. In recent decades, with the rapid development of networks such as cellular networks, wifi networks, and cognitive radio networks, compared with wired networks, wireless communications are more vulnerable to security threats due to their broadcasting and openness. Wireless transmission technology ...

AI Technical Summary

Problems solved by technology

However, if the overall security is considered, not every communication connection is trustworthy. For example, criminals use wireless devices to carry out criminal activities, which becomes difficult to monitor. Once criminal activities occur, it will cause great losses to the society.

Especially in the last ten years, a large number of wireless devices have been produced, and the communication between devices can be realized without entering the core network, which has caused more and more serious regulatory problems. For example, the relatively mature drones are only for aviation the impact is very serious

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