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Collaborative interference physical layer secure transmission method based on optimal relay selection

A technology of physical layer security and transmission method, applied in the field of wireless communication, can solve the problems of low security rate and no consideration of differences, and achieve the effects of reducing transmission cost, increasing security rate, and weakening eavesdropping channels

Active Publication Date: 2019-04-16
XIDIAN UNIV
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  • Application Information

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Problems solved by technology

However, the disadvantage of this method is that it distributes the power equally to each relay without considering the differences between different relays, resulting in a low secrecy rate of the system

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  • Collaborative interference physical layer secure transmission method based on optimal relay selection
  • Collaborative interference physical layer secure transmission method based on optimal relay selection
  • Collaborative interference physical layer secure transmission method based on optimal relay selection

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] refer to figure 1 , the SISOSE eavesdropping model used in the present invention includes a sending node A equipped with 1 antenna, a destination node D equipped with 1 antenna, an eavesdropping node E equipped with 1 antenna, and N relays R k , k=1,...,N, where N represents the number of relays, and the number of antennas for each relay is N k .

[0027] The channel from sending node A to destination node D is called legal channel, and the corresponding channel state information is denoted as h 0 ; The channel from the sending node A to the eavesdropping node E is called the eavesdropping channel, and the corresponding channel state information is denoted as g 0 .

[0028] The channel state information of the kth relay to the destination node D is denoted as in Represents a 1×N subject to a complex Gaussian distributio...

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Abstract

The invention discloses a collaborative interference physical layer secure transmission method based on optimal relay selection, which mainly solves a problem of low secret rate and high transmissioncost of a wireless transmission system in the prior art. An implementation scheme of the method is as follows: a destination node D acquires state information of each channel from each relay to the destination node D and the state information of each channel from each relay to an eavesdropping node E, and selecting an optimal relay R according to the state information of the channels; the R generates an artificial noise signal V; a sending node A sends an information signal, and simultaneously, the optimal relay R sends the artificial noise signal; the destination node D receives the information signal, and the eavesdropping node is suffered from interference of the artificial noise signal V while receiving the information signal. In the method provided by the invention, the optimal relayis selected for sending the artificial noise signal, the eavesdropping node is interfered, link quality of an eavesdropping channel is weakened, transmission complexity and transmission cost of the system are reduced, and secret rate of the system is improved, and the method can be used for a secret communication system comprising a plurality of relays.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a physical layer security transmission method, which can be used in a secure communication system with multiple relays. Background technique [0002] Due to the openness of the wireless communication system, the information sent by the sender may be received by the legitimate receiver, and may also be stolen by potential eavesdroppers. Therefore, the security of information transmission has become an important issue in wireless communication. In addition to the traditional application layer encryption technology based on encryption algorithm, the secure transmission of information can also be solved by using physical layer security technology. By utilizing the randomness and multipath effects of wireless channels, physical layer security technology can obtain the maximum rate at which reliable information can be transmitted to the legitimate receiver without being...

Claims

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Application Information

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IPC IPC(8): H04W12/02H04W40/12H04W40/22H04K1/02
CPCH04K1/02H04W12/02H04W40/12H04W40/22
Inventor 高明刘宇葛建华丁威付少忠李靖
Owner XIDIAN UNIV
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