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Secrecy Rate Maximization at Near User in Untrusted NOMA with Trusted DF Relay
Journal
International Symposium on Advanced Networks and Telecommunication Systems, ANTS
ISSN
21531684
Date Issued
2021-01-01
Author(s)
Amin, Insha
Mishra, Deepak
Saini, Ravikant
Singh, Virendra
Abstract
In this paper, we consider a cooperative non-orthogonal multiple access (NOMA) system with two untrusted users and a trusted decode-and-forward (DF) relay. We formulate two optimization problems to maximize the secrecy rate of near user under two scenarios, namely joint and individual power budget constraints on source and relay. Closed-form expressions are obtained for power sharing between source and relay, along with energy-efficient power allocation coefficients for both the users. Numerical results are provided, which verify the exactness of the theoretical analysis and present insights on the design of a secure cooperative communication network.
Volume
2021-December
Subjects