Recently, Non-orthogonal multiple access (NOMA) has been focused for the next generation
multiple access, which has more spectral efficiency under the limited spectrum bandwidth …

In this paper, we study the application of the non orthogonal multiple access (NOMA) and
orthogonal multiple access (OMA) scheme to cooperative cognitive radio network. We …

In this paper, we study a cooperative non-orthogonal multiple access (NOMA) system
underlying cognitive networks which adapt user relaying and selection combining. The …

This paper proposes a hybrid spectrum accessing mechanism by using NOMA-based
cooperative transmission and beam-forming technology. In this mechanism, the secondary …

In this paper, a downlink scenario of a non-orthogonal multiple access (NOMA) scheme with
power constraint via spectrum sensing is considered. Such network provides improved …

NOMA (Non-orthogonal multiple access) system becoming a strong candidate for 5G
cellular system of its high spectral efficiency. This paper considers an optimal power …

In non‐orthogonal multiple access (NOMA) systems, it may not be advisable to send the
superimposed signal of all users to individual users with retransmission requirements during …

Non-orthogonal multiple access (NOMA) has been focused to increase system capacity and
spectral efficiency for the fifth generation (5G) mobile networks. In order to improve the …

In this study, a cooperative non‐orthogonal multiple access (NOMA) scheme is investigated
in an underlay cognitive radio network. With this aim, a number of secondary users are …

Non-orthogonal multiple access (NOMA) is widely studied in both academia and industry
due to its high spectral efficiency over orthogonal multiple access (OMA). To effectively …