Multiantenna Relay Beamforming Design for QoS Discrimination in Two-Way Relay Networks
Joint Authors
Zhong, Zhangdui
Xiong, Ke
Zhang, Yu
Li, Dandan
Chang, Chih-Yung
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-12-10
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Medicine
Information Technology and Computer Science
Abstract EN
This paper investigates the relay beamforming design for quality of service (QoS) discrimination in two-way relay networks.
The purpose is to keep legitimate two-way relay users exchange their information via a helping multiantenna relay with QoS guarantee while avoiding the exchanged information overhearing by unauthorized receiver.
To this end, we propose a physical layer method, where the relay beamforming is jointly designed with artificial noise (AN) which is used to interfere in the unauthorized user’s reception.
We formulate the joint beamforming and AN (BFA) design into an optimization problem such that the received signal-to-interference-ratio (SINR) at the two legitimate users is over a predefined QoS threshold while limiting the received SINR at the unauthorized user which is under a certain secure threshold.
The objective of the optimization problem is to seek the optimal AN and beamforming vectors to minimize the total power consumed by the relay node.
Since the optimization problem is nonconvex, we solve it by using semidefinite program (SDP) relaxation.
For comparison, we also study the optimal relay beamforming without using AN (BFO) under the same QoS discrimination constraints.
Simulation results show that both the proposed BFA and BFO can achieve the QoS discrimination of the two-way transmission.
However, the proposed BFA yields significant power savings and lower infeasible rates compared with the BFO method.
American Psychological Association (APA)
Xiong, Ke& Zhang, Yu& Li, Dandan& Chang, Chih-Yung& Zhong, Zhangdui. 2013. Multiantenna Relay Beamforming Design for QoS Discrimination in Two-Way Relay Networks. The Scientific World Journal،Vol. 2013, no. 2013, pp.1-8.
https://search.emarefa.net/detail/BIM-1032770
Modern Language Association (MLA)
Xiong, Ke…[et al.]. Multiantenna Relay Beamforming Design for QoS Discrimination in Two-Way Relay Networks. The Scientific World Journal No. 2013 (2013), pp.1-8.
https://search.emarefa.net/detail/BIM-1032770
American Medical Association (AMA)
Xiong, Ke& Zhang, Yu& Li, Dandan& Chang, Chih-Yung& Zhong, Zhangdui. Multiantenna Relay Beamforming Design for QoS Discrimination in Two-Way Relay Networks. The Scientific World Journal. 2013. Vol. 2013, no. 2013, pp.1-8.
https://search.emarefa.net/detail/BIM-1032770
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1032770