Resource allocation for secure multicarrier AF relay system under total power constraint

Abhishek Jindal, Ranjan Bose

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

In this letter, we consider an amplify-and-forward-relay-aided secure multicarrier communication between two nodes with an eavesdropper. We solve the sum secrecy rate maximization problem by solving the following two problems: 1) subcarrier usage policy at the source and the relay; and 2) power allocation among subcarriers between the source and the relay under a total system power constraint. We provide a suboptimal closed-form solution to the problem that involves mixed-integer variables and a nonlinear fractional function. The numerical results demonstrate an improved sum rate by the proposed scheme over a scenario without relay.

Original languageEnglish
Article number6981916
Pages (from-to)231-234
Number of pages4
JournalIEEE Communications Letters
Volume19
Issue number2
DOIs
StatePublished - Feb 1 2015
Externally publishedYes

Keywords

  • amplifyand-forward relay
  • physical layer security
  • secure multicarrier communication
  • secure sum rate

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