Non-Orthogonal Multiple Access and Artificial-Noise Aided Secure Transmission in FD Relay Networks
Date
2017
Authors
Feng, Youhong
Yang, Zhen
Yan, Shihao
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Abstract
In this paper, we investigate an artificial-noise (AN)
aided secure transmission for non-orthogonal multiple access
(NOMA) full-duplex (FD) relay network. We propose a novel
joint NOMA and AN-aided full-duplex relay (NOMA-ANFDR)
scheme to enhance the physical security. In this scheme, the
optimal power allocation between the information and the AN
signal is determined such that the capacity of the two end-to-end
(i.e., two source-relay-destination pairs) channel are maximized
to ensure the highest quality of cooperative transmission. To fully
examine the benefits of the NOMA-ANFDR scheme, we derive a
new closed-form expression for the secrecy outage probability. We
show that the NOMA-ANFDR scheme significantly outperforms
the joint NOMA and AN in half-duplex relay (NOMA-ANHDR)
scheme as well as the NOMA-HDR scheme in terms of minimum
secrecy outage probability and effect secrecy throughout. This
result indicates that adopting the joint of FD and AN technique
at relays can effectively enhance the physical layer secrecy
performance in the NOMA cooperative network.
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Conference paper
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Open Access
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Author/s Accepted Manuscript (AAM) / Post-print