For conventional wireless networks, the main target of resource allocation (RA) is to
efficiently utilize the available resources. Generally, there are no changes in the available …

It has been 20 years since the concept of cognitive radio (CR) was proposed, which is an
efficient approach to provide more access opportunities to connect massive wireless …

We consider the problem of spectrum sharing in a cognitive radio system consisting of a
primary user and a secondary user. The primary user and the secondary user work in a non …

We present a joint sub-channel and power allocation framework for downlink transmission in
an orthogonal frequency-division multiple access (OFDMA)-based cellular network …

The Cognitive Radio and the Cognitive Radio Networks have recently become one of the
most intensively studied paradigms in wireless communications. The main distinctive …

Cognitive radio allows secondary users (SUs) to exploit the underutilized radio spectrum of
the primary networks. To fully utilize the primary spectrum and maximize spectral efficiency …

To cope with drastically increasing user demands for spectrum resource, spectrum sharing
is a strategy that greatly alleviates scarcity. However, without a proper spectrum sharing …

In this paper, we address the constrained resource allocation problems arising in the context
of spectrum sharing in cognitive radio networks utilizing a multi-dimensional formulation …

For a cognitive radio (CR) user to dynamically access the available primary user channels,
the spectrum sensing data is required at various locations; however, the data is not …

In this article, we ponder multi-user medical image transmission using Cognitive Multiple-
input Multiple-output (MIMO) Multi-carrier Code-division-multiple-access (MC-CDMA) …