Covert communication for cooperative NOMA with two phases detection

Hongxing Peng, Zhifa Tian, Xingwang Li, Weizheng Wang, Galymzhan Nauryzbayev, Khaled Rabie, Thippa Reddy Gadekallu

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

This paper investigates the covert communication of cooperative non-orthogonal multiple access (NOMA) systems, where the near user serves as a decode-and-forward (DF) relay and the far user receives the covert information from both the source and the near user. To improve the covertness performance, cooperative jamming and power randomness are adopted. Specifically, we derive detection error probability (DEP) of Willie and the minimum detection error probability (MDEP) at the optimal decision threshold for each phase. In addition, the reliability of the proposed system is investigated by deriving closed-form expressions for the outage probability (OP) of the two users. Under the covertness and reliability constraints, an optimization algorithm to maximize the effective covert rate is designed. Simulation results have confirmed the correctness of the theoretical analysis, and the proposed scheme can achieve a better covert communication.

Original languageEnglish
Pages (from-to)39-49
Number of pages11
JournalAlexandria Engineering Journal
Volume67
DOIs
Publication statusPublished - Mar 15 2023

Keywords

  • Cooperative communication
  • Covert communication
  • Detection error probability
  • Non-orthogonal multiple access

ASJC Scopus subject areas

  • General Engineering

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