A physical layer secure transmission method for a single-antenna amplify-and-forward relay network

A physical layer security, amplification and forwarding technology, applied in the field of physical layer security transmission, can solve the problems of high computational complexity, underestimation of system security performance, etc., and achieve the effect of high security transmission rate

Active Publication Date: 2019-01-08
STATE GRID SHANDONG ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the one hand, this makes the computational complexity of the system high, on the other hand, the solution of the optimization problem largely depends on the accuracy of the search, which underestimates the safety performance of the system in many cases

Method used

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  • A physical layer secure transmission method for a single-antenna amplify-and-forward relay network
  • A physical layer secure transmission method for a single-antenna amplify-and-forward relay network
  • A physical layer secure transmission method for a single-antenna amplify-and-forward relay network

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Embodiment Construction

[0029] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0030] The present invention relates to system models such as figure 1 As shown, it includes a source node, a destination node, an eavesdropping node, and N intermediate nodes. One of the intermediate nodes is selected as an interference node, and the remaining N-1 nodes are numbered from 1 to N-1 as relay nodes. All nodes are configured with a single antenna and work in half-duplex mode. Wherein, N is a positive integer greater than or equal to 1.

[0031] The relay node performs cooperative beamforming on the received data and forwards it to the destination node.

[0032] In the two-stage process of information transmission, the interference node sends interference signals to interfere with the eavesdropping node, and the eavesdropping node eavesdrops on the information of the two stages at the same time.

[0033] Both stages of information transmission...

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Abstract

The invention discloses a physical layer secure transmission method for a single-antenna amplification forwarding relay network. The method comprises a first phase that a source node sends secret information to all relay nodes, and moreover, an interference node sends interference signals to a destination node, an eavesdropping node and all relay nodes, thereby protecting currently transmitted information; and a second phase that each relay node multiplies signals received in the first phase through adoption of diagonal element values of a precoding matrix and then forwards the signals, wherein the precoding matrix is a diagonal matrix, diagonal elements are relay node cooperative beam former weighting coefficients, and moreover, the interference node continues to send the interference signals to the destination node and the eavesdropping node, under the power constraint of the source node, the relay nodes and the interference node, the power distribution of the source node and the relay node cooperative beam formers are optimized, and the maximum secure rate of the single-antenna amplification forwarding relay network is solved.

Description

technical field [0001] The invention belongs to the technical field of wireless transmission, and in particular relates to a physical layer secure transmission method of a single-antenna amplification and forwarding relay network. Background technique [0002] Security is a fundamental problem in wireless communication. The openness of the wireless medium brings greater challenges to security. The physical layer security technology of wireless communication is a new wireless signal security transmission technology. By utilizing the diversity, time-varying and private properties of the space-time-frequency domain of the wireless channel, the communication security problem can be solved at the signal level, which can greatly improve the security performance of the system. It does not rely on the use of key encryption to achieve secure data transmission, and improves the security of information transmission by rationally designing signals, allocating power, and modulation and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04K1/02H04B7/026H04W52/46
CPCH04B7/026H04K1/02H04W52/46
Inventor 苑超李伟马帅徐晓寅冯希军刘志永唐杰段义勇亓建新孙丽玲
Owner STATE GRID SHANDONG ELECTRIC POWER
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