In this paper, we study resource allocation problems for a two-tier cognitive heterogeneous
network in interweave spectrum sharing mode. Secondary users (SUs) in small cells (SCs) …

Booming demand for mobile intelligent terminal equipment results in the exponential growth
of the data flow in the fifth-generation mobile communication network. Small-cell networks …

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 …

In this paper, the power allocation of Non-orthogonal multiple access (NOMA) for secondary
users in underlay cognitive radio is studied. In underlay cognitive radio networks, the …

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 …

To improve the radio spectral efficiency for 5G and beyond, novel radio access techniques
need to be designed to accommodate unprecedented number of connected devices, and …

The non‐orthogonal multiple access (NOMA) technique offers throughput improvement to
meet the demands of the future generation of wireless communication networks. The …

In a conventional cognitive radio (CR) network, only when the primary user's (PU) frequency
bands are sensed to be free, secondary users (SUs) can utilize these frequency band …

In this paper, we study the resource allocation problem, including the joint consideration of
user grouping and power allocation, of an, underlay cognitive radio (CR) network employing …

In this paper, we investigate a joint resource allocation problem based on cognitive radio
(CR) techniques for user equipment with multi-homing capabilities. We consider a …