Cognitive Radio (CR) systems have been proposed to increase the spectrum utilization by
opportunistically access the unused spectrum. Multicarrier communication systems are …

Quick development of wireless communication makes the spectrum scarcity as a one of the
serious problems. Cognitive radio (CR) is considered to be one of the possible solutions to …

Multi-carrier systems are one of the best candidates for applying in cognitive radio (CR)
networks because of the spectrum shaping and high adaptive capabilities. Since secondary …

In this paper, we investigate the energy-efficient resource allocation in orthogonal frequency
division multiplexing (OFDM)-based cognitive radio (CR) networks, where we try to …

We consider power allocation in OFDM based underlay cognitive radio networks with
partially known inter-system CSI (Channel State Information). Under a given total transmit …

In this paper, the problem of resource allocation optimization is studied for a single-cell
multiuser cognitive radio network in the presence of primary user networks. The spectral …

A fast algorithm is proposed to tackle the optimal power allocation problem for orthogonal
frequency division multiplexing (OFDM)-based cognitive radio networks, where the key is to …

In this letter, we develop an optimal power allocation algorithm for the orthogonal frequency
division multiplexing (OFDM)-based cognitive radio (CR) systems with different statistical …

In this paper, we study resource allocation for a multicarrier-based cognitive radio (CR)
network. More specifically, we investigate the problem of secondary users' energy-efficiency …

Cognitive radio (CR) has been proposed to improve spectral efficiency while avoiding
interference with licensed users. In this paper, we propose a resource allocation (RA) …