Secure transmission method adopting information source and relay-combined transmitting antenna selection

A technology for secure transmission and antenna selection, which is applied in radio transmission systems, safety devices, transmission systems, etc., can solve the problem of no direct path from the source to the sink, and achieve the reduction of the receiving signal-to-noise ratio, the improvement of the receiving signal-to-noise ratio, Guarantee the effect of safe transmission

Active Publication Date: 2016-09-07
HUAQIAO UNIVERSITY
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  • Application Information

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Problems solved by technology

Although some people have used the transmit antenna selection technology in the cooperative relay network, the sc

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  • Secure transmission method adopting information source and relay-combined transmitting antenna selection
  • Secure transmission method adopting information source and relay-combined transmitting antenna selection
  • Secure transmission method adopting information source and relay-combined transmitting antenna selection

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Embodiment Construction

[0038] Such as figure 1 As shown, a source-relay joint transmission antenna selection secure transmission method of the present invention, the communication system structure of the embodiment includes four nodes, which are respectively the source, the sink, the relay and the eavesdropper, and all nodes are equipped with multiple antennas , that is, sequentially configure N S , N D , N R and N E root antenna, and the eavesdropper is passive, that is, it will not actively send signals to other nodes, and other nodes cannot know the channel state information of the eavesdropping channel. Each channel in the system uses a quasi-static Rayleigh fading channel; roughly divided into The secure transmission is completed in two time slots. In the first time slot, the source obtains the channel state information from the relay, and based on this information, selects an antenna that can enable the relay to receive the largest signal-to-noise ratio to broadcast a confidential signal. T...

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Abstract

The invention relates to a secure transmission method adopting information source and relay-combined transmitting antenna selection. The method includes the following steps that: in a first time slot, and an information source obtains channel state information from a relay and selects an antenna which makes the received signal to noise of the relay maximum to broadcast confidential signals according to the channel state information, and other three nodes receive signals through adopting maximal-ratio combining; in a second time slot, the relay adaptively decodes a forwarding protocol, when the relay can correctly decode the forwarding protocol, the relay obtains channel state information from an information sink and selects one antenna which makes the received signal to noise of the information sink maximum to forward confidential signals according to the channel state information from the information sink; and when the relay cannot correctly decode the forwarding protocol, the information source obtains the channel state information from the information sink and selects an antenna which makes the received signal to noise of the information sink maximum to retransmit the confidential signals in the first time slot, and the information sink and the relay receive the signals with maximal-ratio combining. According to the method of the invention, transmitting antenna selection technology is adopted to maximize the received signal to noise ratio of the relay or the information sink, and the received signal to noise ratio of an eavesdropper can be decreased, and low complexity and high security can be achieved.

Description

technical field [0001] The invention relates to the fields of wireless communication and physical layer security, in particular to a safe transmission method for information source relay joint transmission antenna selection. Background technique [0002] In recent years, with the rapid popularization of high-speed wireless networks and the rapid development of cloud computing, traditional encryption technologies that rely on complex mathematical algorithms may face difficulties in the more open wireless communication process, and the security of wireless transmission is facing great challenges. In order to ensure the secure transmission of the network, the physical layer security technology that makes full use of the physical characteristics of wireless communication networks (such as spatial characteristics and time-varying characteristics) has become a research hotspot. The early research content of the physical layer security technology mainly involves the information sou...

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Application Information

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IPC IPC(8): H04B7/02H04B7/08H04W12/02
CPCH04B7/026H04B7/0857H04W12/02
Inventor 赵睿林鸿鑫袁毅贺玉成
Owner HUAQIAO UNIVERSITY
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