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Two robust beam forming methods for MISO wiretap channel based on interruption probability constraints

A probabilistic, instantaneous channel technology, applied in the field of communication, which can solve the problem of not considering beamforming design, etc.

Active Publication Date: 2017-05-10
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, they only optimized the power distribution of useful signals and artificial noise, without considering the beamforming design

Method used

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  • Two robust beam forming methods for MISO wiretap channel based on interruption probability constraints
  • Two robust beam forming methods for MISO wiretap channel based on interruption probability constraints
  • Two robust beam forming methods for MISO wiretap channel based on interruption probability constraints

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Embodiment Construction

[0116] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. 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.

[0117] like figure 1 The MISO eavesdropping channel model targeted by the present invention includes a transmitter Alice, a legal user Bob, and K eavesdropping users Eve1,...,EveK. Transmitter ConfigurationN t Root antenna, legitimate users and eavesdropping users configure a single antenna. Assuming that the channel is flat Rayleigh fading, the signals received by the legitimate user and the k-th eavesdropping user are expressed as

[0118]

[0119] in, is the sending s...

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Abstract

The invention discloses two robust beam forming methods for an MISO wiretap channel based on interruption probability constraints. Two robust beam forming schemes for the MISO wiretap channel are provided, a method of bisection, semidefinite relaxation and a Bernstein-type inequality are utilized to transform a nonconvex problem with the interruption probability constraints into a series of semidefinite programming problems in the absence of artificial noise assistance, so that the optimal robust beam forming design is obtained; the total transmitting power is divided into two parts of a useful signal and artificial noise in the presence of artificial noise assistance, through transforming the nonconvex problem with the interruption probability constraints into the semidefinite programming problems, the optimal design of robust beam forming of the useful signal and a covariance matrix of the artificial noise is obtained; the secrecy rate of a communication system is effectively improved, the wiretapping capability of a user is reduced and the security of the communication system is improved.

Description

【Technical field】 [0001] The invention belongs to the field of communications, relates to the technical field of physical layer security in wireless communications, and in particular relates to two robust beamforming methods for MISO eavesdropping channels based on outage probability constraints. 【Background technique】 [0002] In recent years, the continuous development of wireless communication technology enables people to access communication networks anytime and anywhere. However, the broadcast nature of wireless transmission means that all nodes within the transmission range can receive the signal sent by the source, and the information of legitimate users can easily be obtained by eavesdropping users. Therefore, it becomes 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, fa...

Claims

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Application Information

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IPC IPC(8): H04B7/0413H04B7/0408H04B7/0456H04B7/06
CPCH04B7/0408H04B7/0413H04B7/046H04B7/0617
Inventor 徐静许思文孙黎任品毅
Owner XI AN JIAOTONG UNIV
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