Secure interference alignment based multiuser relay system using artificial noise

Deeb Tubail, Mohammed El-Absi, Salama Ikki, Wessam Mesbah, Thomas Kaiser

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations


This paper proposes a novel physical layer security algorithm in interference alignment (IA) based multiuser communication system with a single amplify-And-forward (AF) relay in the coexistence of an eavesdropper that tries to hide its existence. Thus, the relay and the users cannot estimate the eavesdroppers channel state information (CSI). In the proposed algorithm, the users broadcasts artificial noise in the null of the relay at the multiple access (MAC) phase, and the relay jams the eavesdropper by broadcasting the artificial noise in the null of users at the broadcast (BC) phase. Therefore, the proposed algorithm is formulated as a joint optimization problem consisting of two semidefinite programming (SDP) problems aiming at maximizing the power of the artificial noise and preserving the quality-of-services (QoS) of the users. An iterative optimization algorithm is proposed to solve the joint problem. Extensive simulation results are provided to show the effectiveness of the proposed algorithm for IA based relaying networks.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalProceedings - IEEE Global Communications Conference, GLOBECOM
StatePublished - 1 Jul 2017

Bibliographical note

Publisher Copyright:
© 2017 IEEE.


  • Interference Alignment
  • Physical Layer Security
  • Relay
  • Secrecy sum-rate.
  • Two-way communication

ASJC Scopus subject areas

  • Artificial Intelligence
  • Computer Networks and Communications
  • Hardware and Architecture
  • Signal Processing


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