IRS and artificial noise assisted MIMO system physical layer security design method

A technology of physical layer security and artificial noise, applied in transmission systems, radio transmission systems, diversity/multi-antenna systems, etc., can solve the problem of high design complexity, achieve the effect of improving security rate, broad application prospects, and simple implementation process

Active Publication Date: 2021-06-25
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
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  • Application Information

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Problems solved by technology

[0007] In view of this, the purpose of the present invention is to provide a security design method for the physical layer of MIMO systems assisted by IRS and artificial noise, which solves the problem that the design complexity of the phase-shift matrix of several existing intelligent reflective surfaces is high, thereby reducing the computational complexity. Complexity and Improving System Confidentiality

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  • IRS and artificial noise assisted MIMO system physical layer security design method
  • IRS and artificial noise assisted MIMO system physical layer security design method
  • IRS and artificial noise assisted MIMO system physical layer security design method

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Embodiment Construction

[0059] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0060] see Figure 1 to Figure 4 , the wireless system adopted in this embodiment is an IRS and artificial noise-assisted MIMO security model, such as figur...

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Abstract

The invention relates to an IRS and artificial noise assisted MIMO system physical layer security design method, and belongs to the technical field of wireless communication. According to the invention, the method comprises the steps: processing a secrecy rate objective function equivalently based on a mean square error criterion, solving a beam forming matrix and an artificial noise covariance matrix by using an interior point method in convex optimization in an alternate iteration mode, and fixing the two variables; solving an intelligent reflection surface phase shift matrix by using a branch and bound method; and executing the two processes alternately until the secrecy rate objective function reaches convergence. Compared with a traditional semi-definite relaxation method, the secrecy rate of the system can be remarkably improved. The method is simple in implementation process and has a better application prospect.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to an intelligent reflective surface and an artificial noise-assisted MIMO system physical layer security design scheme. Background technique [0002] Intelligent reflecting surfaces (IRS) utilize a large number of low-cost passive reflective elements to realize intelligent configuration of wireless communication environments. Therefore, IRS is expected to be widely used in future mobile communications. [0003] Specifically, the ability of smart reflective surfaces to redirect end-to-end signal propagation through low-cost passive components such as printed dipoles and phase shifters is a revolutionary new feature in any modern wireless system Neither was exploited. Furthermore, the metasurface in the form of an artificial structure can be easily embedded on the surface of building walls, thereby reducing the operational expenditure and complexity of deploying smart ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/0456H04B7/06H04L29/06
CPCH04B7/0456H04B7/0617H04L63/16H04L63/02H04B7/04013Y02D30/70
Inventor 景小荣宋振远
Owner CHONGQING UNIV OF POSTS & TELECOMM
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