Secure Transmission with Optimal Power Allocation in Untrusted Relay Networks

Lifeng Wang, Maged Elkashlan, Jing Huang, Nghi H. Tran, Trung Q. Duong

Research output: Contribution to journalArticlepeer-review

115 Citations (Scopus)

Abstract

We consider the problem of secure transmission in two-hop amplify-and-forward untrusted relay networks. We analyze the ergodic secrecy capacity (ESC) and present compact expressions for the ESC in the high signal-to-noise ratio regime. We also examine the impact of large scale antenna arrays at either the source or the destination. For large antenna arrays at the source, we confirm that the ESC is solely determined by the channel between the relay and the destination. For very large antenna arrays at the destination, we confirm that the ESC is solely determined by the channel between the source and the relay.
Original languageEnglish
Pages (from-to)289-292
Number of pages4
JournalIEEE Wireless Communications Letters
Volume3
Issue number3
Early online date18 Mar 2014
DOIs
Publication statusPublished - Jun 2014

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Electrical and Electronic Engineering
  • Control and Systems Engineering

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