Optimal power allocation for achievable secrecy rate in an untrusted relay network with bounded channel estimation error

Tamer Mekkawy, Rugui Yao, Fei Xu, Ling Wang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

14 Scopus citations

Abstract

The objective of this paper is to maximize the secrecy rate in an untrusted relay network with imperfect channel state information (CSI). Considering bounded channel estimation error in cooperative jamming network, we optimize the power allocation for confidential and jamming signals to maximize the instantaneous secrecy rate. The upper and lower bounds of achievable secrecy rate are analyzed. The ergodic secrecy rate (ESR) is further derived to evaluate the maximum average secrecy rate. And the optimal power allocation is also studied based on ESR. Numerical results show optimal power allocation can increase both instantaneous secrecy rate and ESR, and at higher SNR, the impact of channel estimation error can be neglected for the maximum ESR, which is asymptotically approaches to the upper bound.

Original languageEnglish
Title of host publication2017 26th Wireless and Optical Communication Conference, WOCC 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509049097
DOIs
StatePublished - 15 May 2017
Event26th Wireless and Optical Communication Conference, WOCC 2017 - Newark, United States
Duration: 7 Apr 20178 Apr 2017

Publication series

Name2017 26th Wireless and Optical Communication Conference, WOCC 2017

Conference

Conference26th Wireless and Optical Communication Conference, WOCC 2017
Country/TerritoryUnited States
CityNewark
Period7/04/178/04/17

Keywords

  • bounded error
  • Cooperative jamming
  • ergodic secrecy rate
  • imperfect CSI

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