Source-based jamming for physical-layer security on untrusted full-duplex relay

Saman Atapattu, Nathan Ross, Yindi Jing, Malin Premaratne

Research output: Contribution to journalArticleResearchpeer-review

3 Citations (Scopus)


We address the problem of secure wireless communications over an untrusted full-duplex (FD) relay based on the source jamming scheme. The optimal power allocation between the confidential signal and the jamming signal is derived to maximize the secrecy rate. Then, the corresponding secrecy outage probability (SOP) and the average secrecy rate (ASR) are analyzed. A tight approximation and an asymptotic result are further obtained for the single-antenna destination case both in simple forms. The large-antenna destination case is also analyzed rigorously. Further discussion reveals that transmit-power dependent self-interference has significant negative impact on the secrecy performance.

Original languageEnglish
Article number8674812
Pages (from-to)842-846
Number of pages5
JournalIEEE Communications Letters
Issue number5
Publication statusPublished - 1 May 2019


  • Full-duplex
  • optimal power allocation
  • physical layer security
  • source jamming
  • untrusted relay

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