Non-orthogonal multiple access (NOMA) and cognitive radio (CR) are envisioned as
promising solutions to achieve high spectral efficiency for future wireless networks. This …

In this article, we investigate the performance of spectrum sharing inunderlay cognitive radio
(CR)-inspired nonorthogonal multiple access (NOMA) systems, at which a primary …

To further improve spectral efficiency, this paper considers a non-orthogonal multiple access
(NOMA)-assisted overlay cognitive radio network consisting of a pair of primary users and a …

This paper investigates the performance of an orthogonal frequency-division multiplexing
(OFDM)-based cognitive radio (CR) spectrum sharing communication system that assumes …

In this paper, we study a subcarrier-and-power-allocation problem for orthogonal-frequency-
division multiple-access (OFDMA)-based cognitive radio (CR) systems. In a departure from …

Efficient spectrum sensing ensures cognitive radio users opportunistically use the under-
utilized frequency band without causing harmful interference to primary users. However, in …

With the development of wireless communication systems, it is particularly essential to
maximize the quality of experience (QoE) of machine-to-machine (M2M) communication. In …

This paper considers the resource allocation for an orthogonal-frequency-division-
multiplexing (OFDM)-based cognitive decode-and-forward (DF) relay network. Our objective …

This paper presents a joint subcarrier and power allocation algorithm for cooperative
multiuser orthogonal frequency division multiplexing (MU-OFDM) cognitive radio (CR) …

Non-orthogonal multiple access (NOMA)-based cognitive wireless networks can improve the
spectral efficiency to utilize the vacant spectrum resource and exploit the power domain …