On Secure CDRT With NOMA and Physical-Layer Network Coding

نویسندگان

چکیده

This paper proposes a new scheme to enhance the secrecy performance of non-orthogonal multiple access (NOMA)-based coordinated direct relay transmission (CDRT) systems with an untrusted relay. The physical-layer network coding (PNC) and NOMA schemes are combined improve spectrum efficiency. Furthermore, inter-user interference friendly jamming signals utilized suppress eavesdropping ability without compromising acceptance quality legitimate users. Specifically, far user in first slot near second act as jammers that generate ensure secure transmissions confidential messages. We investigate NOMA-based CDRT PNC derive closed-form expression for ergodic sum rate. asymptotic analysis at high signal-to-noise ratio is performed obtain more insights. Finally, simulation results presented demonstrate proposed scheme’s effectiveness theoretical analysis’s correctness.

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ژورنال

عنوان ژورنال: IEEE Transactions on Communications

سال: 2023

ISSN: ['1558-0857', '0090-6778']

DOI: https://doi.org/10.1109/tcomm.2022.3225548