Journal of Communications and Networks

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Asymptotically Optimal Cooperative Jamming for Physical Layer Security

  • Yang, Jun (Department of Statistical Sciences, University of Toronto) ;
  • Salari, Soheil (Department of Electrical and Computer Engineering, Queen's University) ;
  • Kim, Il-Min (Department of Electrical and Computer Engineering, Queen's University) ;
  • Kim, Dong In (School of Information and Communication Engineering, Sungkyunkwan University (SKKU)) ;
  • Kim, Seokki (Electronics and Telecommunications Research Institute (ETRI)) ;
  • Lim, Kwangae (Electronics and Telecommunications Research Institute (ETRI))
  • Received : 2014.12.17
  • Accepted : 2015.07.30
  • Published : 2016.02.28
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Abstract

Design of effective cooperative jamming (CJ) algorithm is studied in this paper to maximize the achievable secrecy rate when the total transmit power of the source and multiple trusted terminals is constrained. Recently, the same problem was studied in [1] and an optimal algorithm was proposed involving a one-dimensional exhaustive searching.However, the computational complexity of such exhaustive searching could be very high, which may limit the practical use of the optimal algorithm. We propose an asymptotically optimal algorithm, involving only a fast line searching, which can guarantee to achieve the global optimality when the total transmit power goes to infinity. Numerical results demonstrate that the proposed asymptotically optimal algorithm essentially gives the same performance as the algorithm in [1, (44)] but with much lower computational complexity.

Keywords

Acknowledgement

Grant : Development of 5G Mobile Communication Technologies for Hyper-connected smart services

Supported by : IITP

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