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Design method of power domain NOMA secure communication system assisted by intelligent reflecting surface

A technology for secure communication and system design, applied in the field of 1-bit coding, it can solve problems such as malicious interception and eavesdropping on user information, and achieve the effect of saving expensive costs and being simple and easy to operate.

Pending Publication Date: 2021-07-09
BEIJING INFORMATION SCI & TECH UNIV
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Problems solved by technology

In the NOMA network, since the sending end adopts superposition coding and the receiving end uses serial interference erasure decoding, there may be malicious interception and eavesdropping on user information (external eavesdropping) or cause non-orthogonal users to become passive eavesdroppers (internal eavesdropping) tapping)

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  • Design method of power domain NOMA secure communication system assisted by intelligent reflecting surface
  • Design method of power domain NOMA secure communication system assisted by intelligent reflecting surface
  • Design method of power domain NOMA secure communication system assisted by intelligent reflecting surface

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Embodiment Construction

[0067] The present invention will be further described below in conjunction with examples and accompanying drawings. It should be noted that the embodiments do not limit the protection scope of the present invention.

[0068] The purpose of the present invention is to introduce an intelligent reflector into the NOMA system in the power domain, give full play to the advantages of the two, realize safe and reliable transmission on limited communication resources, and design an efficient and safe communication transmission scheme.

[0069] A method for designing a power domain NOMA security communication system based on an intelligent reflector, comprising the following steps:

[0070] Step 1: Establish a NOMA secure communication system model in the intelligent reflector auxiliary power domain, and give the received signal expressions of legitimate users and eavesdroppers in both external and internal eavesdropping scenarios;

[0071] Step 2: The near-end user uses serial interf...

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Abstract

The invention provides a design method of a power domain NOMA secure communication system assisted by an intelligent reflecting surface, which comprises two scenes of external eavesdropping and internal eavesdropping, and comprises the following steps of: sending information to legal non-orthogonal users by a base station through the assistance of the intelligent reflecting surface; establishing an intelligent reflector-assisted NOMA secure communication system model, giving a received signal expression and a detection signal-to-noise ratio of a legal user and an eavesdropping user, converting continuous phase shift of a reflection unit into random phase shift by using a 1-bit coding mechanism, performing on-off control on the reflection unit through 1 and 0, maximizing the reception signal-to-interference-and-noise-ratio of the legal user, inhibiting the performance of an eavesdropper, deriving a theoretical expression of the security outage probability of the non-orthogonal user. Compared with an intelligent reflecting surface assisted OMA system, the method has the advantages that the safety outage probability performance is improved, and the good application value is achieved.

Description

technical field [0001] The invention relates to a design method of a power domain NOMA security communication system assisted by an intelligent reflection surface, which belongs to the technical field of wireless communication, and in particular relates to two eavesdropping models (external eavesdropping and internal eavesdropping) and a method for converting the continuous phase shift on the reflection unit 1-bit encoding method for random phase shift. Background technique [0002] With the commercial deployment of the 5G communication system, the multiple access technology of the 6G mobile communication network needs to realize the effective improvement of the total number of access users and the total throughput of the network under the given physical resource conditions from the perspective of the system and the network. The power domain NOMA technology transmits the information of multiple users on the same physical resource by means of the superposition coding mechanis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04K1/00H04W12/02
CPCH04W12/02H04K1/006
Inventor 岳新伟巩彩虹刘荣科李学华刘元玮
Owner BEIJING INFORMATION SCI & TECH UNIV
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