In cognitive radio networks, the available spectrum holes are usually discontinuous. Hence,
it is hard to exploit these spectrum holes because the bandwidth of an individual one may …

In cognitive radio networks, the available vacant frequency bands, referred to as spectrum
holes, are usually discontinuous. Hence, it is hard to exploit these vacant frequency bands …

In cognitive radio networks, the idle spectrum bands that cognitive users sensed are usually
discontinuous. Only one idle spectrum band may not be able to fulfill cognitive users' …

The low spectrum utilization has limited the development of wireless communication is a
common view In Cognitive Radio (CR). And the idle spectrum holes are too narrow to …

Cognitive radio has been introduced as a promising solution to the apparent problem of
spectrum scarcity by exploiting unused portions of spectrum. The available spectrum bands …

In this paper, we propose a clustering-based resource allocation (RA) scheme for the
multiuser orthogonal frequency division multiplexing (OFDM)-based cognitive radio network …

Cognitive radio technology solves the spectrum under-utilization problem by enabling the
secondary users access the spectrum holes opportunistically. Therefore, how to efficiently …

The spectrum allocation for cognitive radio networks (CRNs) has received considerable
studies under the assumption that the bandwidth of spectrum holes is static. However, in …

Cognitive radio technology is considered to be an effective solution to improve the spectrum
utilization efficiency. The dynamic spectrum allocation algorithm assigns the available …

One important issue associated with spectrum management in heterogeneous cognitive
radio network is: how to appropriately allocate the spectrum to the secondary …