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A physical layer secure transmission method for a full-dimensional multi-antenna swipt system

A technology of physical layer security and transmission method, which is applied in the field of physical layer security transmission of full-dimensional multi-antenna SWIPT system, and can solve the problems of large search range, high computational complexity and neglect of one-dimensional search method.

Active Publication Date: 2020-11-24
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

The existing literature studies the security of the SWIPT system in the 2D model, ignoring the influence of the vertical dimension
In addition, for the solution of the problem of maximizing the system security rate under the constraints of energy harvesting, the one-dimensional search method has a large search range and high computational complexity

Method used

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  • A physical layer secure transmission method for a full-dimensional multi-antenna swipt system

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Embodiment Construction

[0029] The core idea of ​​the present invention is that the previous research on the security of the SWIPT system was mainly carried out in two-dimensional channels, but the present invention is based on the analysis of the secure transmission rate of the SWIPT system in a full-dimensional antenna network, that is, in a three-dimensional antenna network analyze. The applicant found that the Lagrangian relaxation optimization algorithm is an efficient and low-complexity algorithm. Therefore, the present invention mainly uses the user's channel state information and Lagrangian relaxation optimization algorithm to optimize the transmit power and power split ratio for research, and obtains the optimal solution to maximize the system security rate.

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] Such as figure 1 As described above, the embodiment of the present invention provides a phy...

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Abstract

The invention analyzes the security transmission rate of the SWIPT system in a full-dimensional antenna network by using theoretical tools such as a stochastic matrix and nonlinear optimization. An optimal 3D beam forming vector is acquired by maximizing the traversal transmission rate, and a system security transmission rate under the collected energy constraint is deduced. An optimal solution tomaximize the system security rate is obtained by combining a Lagrangian relaxation optimization algorithm with optimized transmitting power and power split ratio.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a physical layer secure transmission method of a full-dimensional multi-antenna SWIPT system. Background technique [0002] Wireless Information and Power Simultaneous Transmission (SWIPT) is an emerging research direction. It can transmit data and energy through radio frequency signals, avoiding the trouble of frequent charging and battery replacement of wireless devices, greatly improving communication quality and prolonging communication time. However, due to the openness and fading of wireless channels, how to maintain a good balance between information security transmission and energy transmission efficiency has become a challenge for SWIPT. Due to its high spatial resolution, large-scale antenna beamforming technology is applied to the SWIPT system to improve the security of wireless communication. The full-dimensional multi-antenna beamforming technology ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04B7/0452H04W52/24H04W52/34H04W52/42
CPCH04B7/0452H04B7/0617H04B7/0626H04W52/242H04W52/346H04W52/42
Inventor 赵伟李保罡鲍慧张珂
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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