Today’s wireless networks are characterized by fixed spectrum assignment policy. The limited available spectrum and the inefficiency in the spectrum usage necessitate a new communication paradigm to exploit the existing wireless spectrum opportunistically. Cognitive radio is a paradigm for wireless communication in which either a network or a wireless node changes its transmission or reception ...

Abstract Cognitive radio (CR) allows the best use of dynamic access to spectrum and wide diversity mitigate depletion issues fulfil huge wireless networking requirements. This paper also illustrates, discusses, focuses on some essential applications, a proactive sharing strategy using full-duplex (FD) in cooperative Radio Networks (CRN).

Efficient and Robust Spectrum Management for Cognitive Radio Networks

Cognitive radio is an intelligent radio that can be programmed and configured dynamically to fully use the frequency resources that are not used by licensed users. It defines the radio devices that are capable of learning and adapting to their transmission to the external radio environment, which means it has some kind of intelligence for monitoring the radio environment, learning the environme...

Cognitive radio networks provide an opportunity for unlicensed users (secondary users) to use the allocated spectrum band when not in use by legitimate users (primary users). To use a channel or spectrum, it is required to sense the channel for the presence of primary user which is called Spectrum Sensing. In order to reduce the sensing time of spectrum and to determine the state of the channel...