KSII Transactions on Internet and Information Systems (TIIS)

Korean Society for Internet Information (한국인터넷정보학회)
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Cooperative Beamformer Design for Improving Physical Layer Security in Multi-Hop Decode-and-Forward Relay Networks

  • Lee, Han-Byul (School of Electrical Engineering and Computer Science, Seoul National University) ;
  • Lee, Jong-Ho (Department of Electronic Engineering, Gachon University) ;
  • Kim, Seong-Cheol (School of Electrical Engineering and Computer Science, Seoul National University)
  • Received : 2015.09.04
  • Accepted : 2015.11.22
  • Published : 2016.01.31
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Abstract

In this paper, we consider secure communications in multi-hop relaying systems, where multiple decode-and-forward (DF) relays are located at each individual hop and perform cooperative beamforming to improve physical layer security. In order to determine the cooperative relay beamformer at each hop, we propose an iterative beamformer update scheme using semidefinite relaxation and bisection techniques. Numerical results are presented to verify the secrecy rate performance of the proposed scheme.

Keywords

Acknowledgement

Grant : 무선 MIMO Ad-hoc 네트워크를 위한 게임 이론 기반의 제한적 피드백 분산 빔포밍 기술 개발

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