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Information Security Transmission Method Based on Unjoined Artificial Noise in Untrusted Relay System

A technology of artificial noise and relay system, applied in the direction of transmission system, electrical components, etc.

Active Publication Date: 2018-03-02
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the forwarding nodes in the relay system are not all safe and reliable. They may also obtain the content of the transmitted information while forwarding the information, and become eavesdroppers in the wireless network.

Method used

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  • Information Security Transmission Method Based on Unjoined Artificial Noise in Untrusted Relay System
  • Information Security Transmission Method Based on Unjoined Artificial Noise in Untrusted Relay System
  • Information Security Transmission Method Based on Unjoined Artificial Noise in Untrusted Relay System

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Embodiment Construction

[0078] The present invention is described in further detail below in conjunction with accompanying drawing:

[0079] like figure 1 As shown, the information security transmission method based on non-joint artificial noise in the untrusted relay system of the present invention, the untrusted relay system includes: a sending node A, a relay node B, a receiving node C and an interference node d. There is a requirement for one-way communication between the sending node A and the receiving node C, but because they are far apart or blocked by obstacles, they cannot directly establish a one-way transmission link, and need the assistance of the relay node B, the relay Node B adopts an amplify and forward protocol. However, since the security of relay node B is unknown, it may cause information leakage while forwarding information, so it is necessary to interfere with node D to send artificial noise to ensure the security of information. However, the artificial noise of the interfer...

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Abstract

The invention discloses an information safety transmission method based on non-associative artificial noise in an untrusted relay system. The untrusted relay system comprises a sending node A, a relay node B, a receiving node C and an interference node D. The information safety transmission method is implemented in the following steps: firstly, the interference node sends artificial nose so as to interfere a signal received by the relay node B at the first stage, thereby allowing the relay node B to generate an error code platform; and on this basis, the receiving node C processes signals from two stages by use of different criterions, so interference received by the signals at the first stage is recued, and the bit error rate of the receiving node C is effectively reduced. A simulation result shows that by use of the provided three strategies, namely the zero-forcing detection, the minimum mean squared error detection and the maximum likelihood detection, the bit error rate of the receiving node C is allowed to be apparently lower than that of the untrusted relay node B. Thus, safety is ensured and the performance of the minimum mean squared error detection and the performance of the maximum likelihood detection are similar and better than that of the zero-forcing detection.

Description

Technical field: [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an information security transmission method based on non-joint artificial noise in an untrusted relay system. Background technique: [0002] In order to meet people's increasing needs for advanced communication services, the next generation wireless communication system needs to provide higher transmission rate and more reliable transmission performance. On the other hand, the future wireless communication network will be a heterogeneous communication network supporting multiple wireless communication systems. Using the method of adding base stations to improve the coverage of the wireless communication network will greatly increase the cost of wireless communication. The multi-antenna system has received extensive attention because it can significantly improve the transmission performance and spectrum efficiency of the system. However, the volume and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7105
CPCH04B1/7105
Inventor 杜清河卢楠孙黎任品毅
Owner XI AN JIAOTONG UNIV
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