Physical Layer Security Aided Wireless Interference Networks in the Presence of Strong Eavesdropper Channels

Zhichao Sheng, Hoang Duong Tuan, Ali Arshad Nasir, H. Vincent Poor, Eryk Dutkiewicz

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Under both long (infinite) and short (finite) blocklength transmissions, this paper considers physical layer security for a wireless interference network of multiple transmitter-user pairs, which is overheard by multiple eavesdroppers (EVs). The EVs are assumed to have better channel conditions than the legitimate users (UEs), making the conventional transmission unsecured. The paper develops a novel time-fraction based transmission, under which the information is transmitted to the UEs within a fraction of the time slot and artificial noise (AN) is transmitted within the remaining fraction to counter the strong EVs' channels. Based on channel distribution information of UEs and EVs, the joint design of transmit beamforming, time fractions and AN power allocation to maximize the worst users' secrecy rate is formulated in terms of nonconvex problems. Path-following algorithms of low complexity and rapid convergence are proposed for their solution. Simulations are provided to demonstrate the viability of the proposed methodology.

Original languageEnglish (US)
Article number9419961
Pages (from-to)3228-3240
Number of pages13
JournalIEEE Transactions on Information Forensics and Security
StatePublished - 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Safety, Risk, Reliability and Quality
  • Computer Networks and Communications


  • Interference network
  • nonconvex optimization
  • outage-aware beamforming
  • path-following algorithms
  • physical layer security


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