Method for realizing physical layer security and power optimization of full-duplex communication system

Abstract

The invention discloses a method for realizing physical layer security and power optimization of a full-duplex communication system. A model fully utilizes the characteristic of same frequency at the same time of the full-duplex communication system, and assistance from man-made noise and other interference nodes is unnecessary, so that the transmission efficiency of a full-duplex base station is further increased, and the transmission power of the base station is optimized under the condition that the full-duplex system information transmission is guaranteed to reach to a target secure rate. The method mainly comprises the steps of constructing a physical layer security model of the full-duplex communication system; constructing a convex optimization model based on a secure rate required by the system; and finally converting a non-convex problem which is difficult to solve into a convex optimization problem which is easy to solve by utilizing an SDP theory and an S-Procedure theory, thereby finding an optimal beam forming vector and optimizing the transmission power of the base station. According to the method for realizing physical layer security and power optimization of the full-duplex communication system, the minimum transmission power of the base station is guaranteed and all the transmission power of the base station is guaranteed to be used for transmission of effective signals under the condition of secure transmission of the full-duplex system, and the transmission power of the full-duplex base station is accordingly optimized.

Description

technical field [0001] The invention relates to the security field of a full-duplex communication system, in particular to a method for realizing physical layer security and power optimization of a full-duplex communication system. Background technique [0002] As one of the key candidate technologies for the physical layer of 5G communication, full-duplex transmission technology has been written into the IMT-2020 technical framework. [0003] One of the key factors affecting the performance of full-duplex transmission is the strong self-interference signal caused by the transmitting antenna of the same communication device to the receiving antenna. At present, most of the research is focused on the self-interference cancellation technology of the full-duplex system and has a better Effectiveness, which provides a feasible basis for the application of full-duplex technology. However, in these studies, the discussion of full-duplex secure transmission mechanism is rarely inv...

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Problems solved by technology

[0007] The present invention aims at the current full-duplex physical layer security research by adding artificial noise to realize the safe transmission of the full-duplex system, and does not fully explore the characteristics of the full-duplex system at the same time and frequency in order to improve and optimize the full-duplex system Insufficient communication security, providing a full-duplex communication system to achieve physical layer security method, in this method, the physical layer security model of the full-duplex communication system without the assistance of artificial noise and other interfering nodes is constructed

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