Cognitive radio (CR) is a new intelligent radio technology, which provides users with high
quality of service (QoS) through dynamic access spectrum and can greatly improve the …

With the rapid growth of wireless technologies, current spectrum scarcity has become a
serious problem. Cognitive radio (CR) is a promising solution to the problem of spectrum …

In this paper, the robust resource allocation problem for the orthogonal frequency division
multiplexing (OFDM) based cooperative cognitive radio networks (CRNs) with decode and …

The fifth-generation communication system is in the hot stage of research and development,
which will be extended to enhance system capacity from the spectrum expansion, spectrum …

The need for spectrum is ever-growing as the use of data services is becoming pervasive.
With the onset of new services like smart cities and internet of things (IoTs), and infotainment …

The objective of this paper is to optimize the power allocation to maximize the total rate of
secondary users (SUs) under the SU total transmit power constraint and primary user (PU) …

This letter investigates the resource allocation problem for OFDM cooperative cognitive
radio networks (CRNs) in which many practical constraints are to be considered. In order to …

The popularity of diverse wireless communication systems has led to increased strains on
the unlicensed spectrum. However, investigations have shown that vast portions of the …

In our proposed plan, we try to obtain an optimal power allocation scheme of cognitive radio
along with singlehop relay node strategy. Regenerative relaying protocol is used in many …

A life-centric model of single hop regenerative relay based cognitive radio system is
introduced. Objective of this paper is to minimize the outage probability while satisfying the …