Optimization method for safe transmission of distributed IRS auxiliary communication system
A technology for system security and auxiliary communication, which is applied in the field of optimization of secure transmission of distributed IRS auxiliary communication system, can solve problems such as difficulty in ensuring system security, and achieve the effect of high total confidentiality rate
Pending Publication Date: 2022-03-08
ANHUI NORMAL UNIV
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[0003] On the other hand, as the wireless network environment becomes more and more complex, it is difficult for the information security technology in the traditional wireless communication system to guarantee the security of the system.
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[0061] Now in conjunction with accompanying drawing, concrete implementation of the present invention is described in further detail:
[0062] Such as figure 1 As shown, the distributed IRS assisted communication system includes: a multi-antenna base station, K single-antenna users, a single-antenna eavesdropper and L IRS, in which the base station contains N t Antennas, each IRS contains M reflection units. Use the downlink transmission method. The channel coefficients between the base station and IRS, IRS and users, and eavesdroppers are respectively: All channels obey the small-scale Rician fading model. Let the bandwidth of each channel of the system be the unit bandwidth. The phase shift matrix of the lth IRS in Indicates the mth phase shift of the lth IRS. In order to improve the overall safety rate of the system, an optimization problem is proposed:
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[0066] C 3 :Z≥0.
[0067] in, represent the information rate of the...
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The invention discloses an optimization method for safe transmission of a distributed IRS (Inter-Reference Signal) auxiliary communication system. The optimization method mainly comprises the following steps: S1, constructing a distributed IRS auxiliary multi-input single-output wireless communication system; s2, a communication scene is considered as a straight-through link, and the base station transmits information to legal users in the system through the distributed IRS; s3, the base station sends the artificial interference noise while sending the useful signal; under the scene that the total emission energy of a base station is limited, an optimization equation which is based on beam forming, artificial noise and IRS phase shift parameters and is used for maximizing the system safety rate sum of optimization parameters is constructed. Performing decoupling optimization solution on active beam forming, artificial noise and IRS phase shift parameters of the base station based on an alternating optimization algorithm; s4, active beam forming and artificial noise of the base station are optimized through continuous convex approximation and semi-definite relaxation; and S5, carrying out solution by adopting a manifold optimization or minimum-maximization algorithm. According to the invention, the security of a communication system can be obviously improved.
Description
technical field [0001] The invention belongs to the technical field of wireless communication, and relates to an optimization method for safe transmission of a distributed IRS auxiliary communication system. Background technique [0002] With the widespread deployment of fifth-generation (5G) wireless networks, the overall architecture of the network is becoming larger and more complex. The requirements for network data rate and energy efficiency, reliability and low latency are also getting higher and higher. However, currently available technologies may not fully meet these needs. In view of this, there is an urgent need to develop new technologies to reduce network cost, complexity and energy consumption. As one of the most representative new technologies, Intelligent Reflecting Surface (IRS, Intelligent Reflecting Surface) provides additional degrees of freedom in system design by intelligently changing the propagation environment. The IRS is composed of a large numbe...
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Login to View More IPC IPC(8): H04K1/02H04K3/00H04B7/06
CPCH04K1/02H04K3/44H04K3/825H04B7/0617H04B7/04013
Inventor 冯友宏张彦峨刘席席董程秋张绅
Owner ANHUI NORMAL UNIV