Optimal Power Allocation for Multiuser Secure Communication in Cooperative Relaying Networks

Trung Q. Duong, Tiep M. Hoang, Chinmoy Kundu, Maged Elkashlan, Arumugam Nallanathan

Research output: Contribution to journalArticle

24 Citations (Scopus)
179 Downloads (Pure)

Abstract

We consider a cooperative relaying network in which a source communicates with a group of users in the presence of one eavesdropper. We assume that there are no source-user links and the group of users receive only retransmitted signal from the relay. Whereas, the eavesdropper receives both the original and retransmitted signals. Under these assumptions, we exploit the user selection technique to enhance the secure performance. We first find the optimal power allocation strategy when the source has the full channel state information (CSI) of all links. We then evaluate the security level through: i) ergodic secrecy rate and ii) secrecy outage probability when having only the statistical knowledge of CSIs.
Original languageEnglish
Pages (from-to)516-519
Number of pages4
JournalIEEE Wireless Communications Letters
Volume5
Issue number5
Early online date02 Aug 2016
DOIs
Publication statusPublished - Oct 2016

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