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Two-dimensional robust beamforming method under MISO wiretap channel based on outage probability constraint

An eavesdropping channel and beamforming technology, which is applied in space transmit diversity, radio transmission systems, electrical components, etc., can solve problems such as physical layer security and channel state information errors, so as to reduce eavesdropping ability, improve confidentiality rate, and improve safety effect

Active Publication Date: 2018-10-26
XI AN JIAOTONG UNIV
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Problems solved by technology

However, regarding the channel state information obtained by the transmitter, they did not consider the following situations: 1) there is an error in the channel state information of the legitimate user;

Method used

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  • Two-dimensional robust beamforming method under MISO wiretap channel based on outage probability constraint
  • Two-dimensional robust beamforming method under MISO wiretap channel based on outage probability constraint
  • Two-dimensional robust beamforming method under MISO wiretap channel based on outage probability constraint

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Embodiment Construction

[0061] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments. Apparently, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0062] Such as figure 1 As shown, the MISO eavesdropping channel model targeted by the present invention includes a transmitter Alice, M legitimate users Bob1,..., Bob M, and an eavesdropping user Eve. Transmitter ConfigurationN t The root antenna, the legitimate user and the eavesdropping user configure a single antenna.

[0063] Alamouti coding, two consecutive symbols can be synthesized and coded, and the symbol vector is shown in formula (1):

[0064] s=[s 1 ,s 2 ] T (1)

[0065...

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Abstract

The invention discloses a two-dimensional robust beamforming method under an MISO wiretap channel based on outage probability constraint. According to the method, an MISO wiretap channel robust beamforming scheme is provided. Under unicast and multicast condition, through utilization of a bisection method, semidefinite relaxation and a Bernstein-type inequation, a nonconvex problem with the outageprobability constraint is converted into a series of semidefinite planning problems, the optimum robust beamforming design is obtained based on a Gaussian variable, a secrecy rate of a communicationsystem is effectively improved, the wiretap capacity of a wiretap user is reduced, and the security of the communication system is improved.

Description

technical field [0001] The invention belongs to the technical field of physical layer security in wireless communication, and in particular relates to a two-dimensional robust beamforming method under a MISO wiretapping channel based on interruption probability constraints. Background technique [0002] In recent years, the continuous development of wireless communication technology has enabled people to access communication networks anytime and anywhere. However, the broadcast nature of wireless communication means that all nodes within the transmission range can receive the signal sent by the source, and the information of legitimate users is easily obtained by eavesdropping users. Therefore, it is particularly important to ensure the secure transmission of wireless communication [1]. Compared with traditional encryption methods, physical layer security aims to use the physical layer characteristics of wireless communication, such as noise, fading, etc., to ensure the sec...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04L29/06
CPCH04B7/0617H04L63/16
Inventor 徐静刘智英孙黎任品毅
Owner XI AN JIAOTONG UNIV
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