Beam forming method in multi-antenna untrusted relay network

A relay network and beamforming technology, applied in diversity/multi-antenna systems, channel estimation, radio transmission systems, etc., can solve the problems of not making full use of multi-antenna degrees of freedom, increasing the complexity of optimization design, etc., to improve cooperative interference Effect, the effect of increasing the safety rate

Active Publication Date: 2017-12-01
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

Although this document configures multiple antennas in the source, destination and relay nodes, the source transmits symbols of one dimension and does not make full use of the degrees of freedom brought by the multiple antennas. This setting has great particularity
[0008] To sum up, the spatial degree of freedom introduced by multiple antennas helps to focus the transmitted signal and the cooperative interference signal, but the optimization design complexity also increases sharply

Method used

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  • Beam forming method in multi-antenna untrusted relay network
  • Beam forming method in multi-antenna untrusted relay network
  • Beam forming method in multi-antenna untrusted relay network

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0022] The present invention specifically studies the problem of precoding optimization design of multi-antenna untrustworthy relay network, and extends single antenna to multi-antenna, mainly considering the situation that the source, destination, and relay are all multi-antenna, and the relay node itself is untrustworthy , configure multiple antennas, and introduce spatial degrees of freedom. For the multi-antenna untrusted relay network, the precoding optimization design based on signal alignment is carried out to maximize the system security rate.

[0023] The present invention designs the precoding matrix F S and F D, to ensure that the untrustworthy relay node R cannot eavesdrop on the useful signal, and the destination node D can decode the useful signal, so as to ...

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Abstract

The present invention provides a beam forming method in a multi-antenna untrusted relay network. The method comprises of designing the pre-coding matrixes FS and FD to ensure that an untrusted relay node R cannot eavesdrop a useful signal and that a destination node D is able to decode the useful signal so as to improve the reachable safety rate of the network. The method of the invention introduces the multi-antenna technology and does research on a pre-coding design scheme of a multi-antenna untrusted relay network. Through the multi-dimensional signal processing, a transmitted signal is aligned to the useful signal space and orthogonalized to the cooperative interference space so that the transmitted signal and the cooperative interference signal are effectively focused, improving the cooperative interference effect and the safety rate.

Description

technical field [0001] The present invention relates to a beamforming technique with channel selection. Background technique [0002] Due to the openness of wireless communication, wireless signals are easy to be eavesdropped, tampered with and interfered, which poses a great threat to users' secure communication. Therefore, the security issue of wireless network is mentioned more and more frequently, and has also received more and more attention. In recent years, with the continuous development of physical layer technology in wireless communication, a large number of technical foundations have been accumulated to realize secure information transmission at the physical layer, and it is becoming more and more urgent to improve the security of wireless communication. Therefore, physical layer security (Physical-Layer Security) has received extensive attention in both theoretical research and practical application. [0003] Traditional physical layer security research mostly ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/06H04B7/155H04L25/02H04B17/345
CPCH04B7/0413H04B7/0456H04B7/0617H04B7/15564H04B17/345H04L25/021
Inventor 姚如贵陆亚南徐菲吴啟洪
Owner NORTHWESTERN POLYTECHNICAL UNIV
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