Covert Communication in Downlink NOMA Systems With Random Transmit Power

• Published in: IEEE wireless communications letters Vol. 9; no. 11; pp. 2000 - 2004
• Main Authors: Tao, Liwei, Yang, Weiwei, Yan, Shihao, Wu, Dan, Guan, Xinrong, Chen, Dechuan
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01.11.2020; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Communication; Covert communication; Downlink; Downlinking; Error detection; Error probability; Gold; NOMA; Optimization; power allocation; random transmit power; Receivers; Resource management; Signal to noise ratio; Systems design

This letter considers covert communication in downlink NOMA systems, where a public action (communication from Alice to the NOMA-weak user U1) is used to provide a cover for a secret action (communication from Alice to the NOMA-strong user U2). To aid system design, we first derive the detection err...