Physical Layer Security for Cooperative NOMA Systems

In this correspondence, we investigate the physical layer security for cooperative nonorthogonal multiple access (NOMA) systems, where both amplify-and-forward (AF) and decode-and-forward (DF) protocols are considered. More specifically, some analytical expressions are derived for secrecy outage pro...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2018-05, Vol.67 (5), p.4645-4649
Main Authors: Chen, Jianchao, Yang, Liang, Alouini, Mohamed-Slim
Format: Article
Language:English
Subjects:
Mathematical analysis
Network security
NOMA
Non-orthogonal multiple access (NOMA)
Nonorthogonal multiple access
Physical layer
Power system reliability
Protocols
relaying
Relays
secrecy outage probability (SOP)
Security
Signal to noise ratio
strictly positive secrecy capacity (SPSC)
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Summary:In this correspondence, we investigate the physical layer security for cooperative nonorthogonal multiple access (NOMA) systems, where both amplify-and-forward (AF) and decode-and-forward (DF) protocols are considered. More specifically, some analytical expressions are derived for secrecy outage probability (SOP) and strictly positive secrecy capacity. Results show that AF and DF almost achieve the same secrecy performance. Moreover, asymptotic results demonstrate that the SOP tends to a constant at high signal-to-noise ratio. Finally, our results show that the secrecy performance of considered NOMA systems is independent of the channel conditions between the relay and the poor user.
ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2017.2789223