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  • 标题:Power allocation‐Assisted secrecy analysis for NOMA enabled cooperative network under multiple eavesdroppers
  • 本地全文:下载
  • 作者:V. Narasimha Nayak ; Kiran Kumar Gurrala
  • 期刊名称:ETRI Journal
  • 印刷版ISSN:1225-6463
  • 电子版ISSN:2233-7326
  • 出版年度:2021
  • 卷号:43
  • 期号:4
  • 页码:758-768
  • DOI:10.4218/etrij.2020-0084
  • 语种:English
  • 出版社:Electronics and Telecommunications Research Institute
  • 摘要:In this work, the secrecy of a typical wireless cooperative dual‐hop non‐orthogonal multiple access (NOMA)‐enabled decode‐and‐forward (DF) relay network is investigated with the impact of collaborative and non‐collaborative eavesdropping. The system model consists of a source that broadcasts the multiplexed signal to two NOMA users via a DF relay, and information security against the eavesdropper nodes is provided by a helpful jammer. The performance metric is secrecy rate and ergodic secrecy capacity is approximated analytically. In addition, a differential evolution algorithm‐based power allocation scheme is proposed to find the optimal power allocation factors for relay, jammer, and NOMA users by employing different jamming schemes. Furthermore, the secrecy rate analysis is validated at the NOMA users by adopting different jamming schemes such as without jamming (WJ) or conventional relaying, jamming (J), and with control jamming (CJ). Simulation results demonstrate the superiority of CJ over the J and WJ schemes. Finally, the proposed power allocation outperforms the fixed power allocation under all conditions considered in this work.
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