Cognitive Radio (CR) has caught a lot of attention lately due to its unprecedented capabilities, and its potential to enhance the user's radio experience. CR, as introduced by Mitola, adds a new dimension in the radio domain; that’s the incorporation of the capabilities of knowledge representation and processing. Combined with reasoning functionalities the radio is capable of providing a vast r...

Software Defined Radio (SDR) and Cognitive Radio (CR) are fast technologies, which can be used to reduce the spectrum shortage problem. The modern software defined radio has been called the heart of a cognitive radio. The applications executing on the radio differentiate a cognitive radio from a software-defined radio. Additional hardware in the form of sensors and actuators increases the more ...

Cognitive radio (CR) has been an active research topic in wireless communications. In this dissertation, radio behavior and potential security threats in cognitive radio networks are investigated in order to successfully deploy CR networks and realize its benefits. We study complex CR misuse issues during its secondary access processes, including misbehavior, cheating, and attack. Different cou...

Cognitive Radio (CR) is an intelligent radio that can dynamically access the radio spectrum. Secondary users in Cognitive Radio Network (CRN) can access the licensed spectrum without causing harmful interference to primary users. The performance of cognitive radio networking functionalities depends on the properties of the spectrum band in use. This necessitates a crosslayer design in the entir...

Cognitive radio sensor network (CRSN) has emerged as a promising solution to address the spectrum-related challenges of wireless sensor networks (WSN). Moreover, cognitive radio (CR) gives us a possibility to maximize the utilization efficiency of limited spectrum resources. In this paper, we propose an intelligent power control scheme to address the communication requirements in cognitive radi...

Due to the ever growing need for spectrum, the cognitive radio (CR) has been proposed to improve the radio spectrum utilization. In this scenario, the secondary users (SU) are permitted to share spectrum with the licensed primary users (SU) with a strict condition that they do not cause harmful interference to the cognitive network. In this work, we have proposed an interference model for cogni...

In this paper, resource allocation models for cognitive radio networks (CRN) using game theory are presented. The study includes the concept of cognitive radio (CR) networks, cooperative and non-cooperative game theory, and modeling of strategic interaction process for CR enabled secondary users. The prime objective of the present study is to compare existing game models for CR networks in term...

Cognitive Radio (CR) is used to access the unused licensed spectrum by the unlicensed users. While accessing the licensed spectrum by CR user’s radiation or signals of Cognitive radio users interfere and disturb the licensed user signal. This problem can be rectified by constructing a spectrum mask across the CR users, which eliminates the Out of Band radiation of CR users. In this paper we pro...

Cognitive Radio (CR) operates in different fields as varied, one of these is cognitive radio networks. In this paper, we propose a new approach used CR, which aims to manage potential failures of computer systems and applications through the introduction of two aspects of autonomous networks to make systems capable of managing themselves with minimum human intervention. Keywords— Cognitive Radi...

The growing demand for wireless applications and services on the one hand, and limited available radio spectrum on the other hand have made cognitive radio (CR) a promising solution for future mobile networks. It has attracted considerable attention by academia and industry since its introduction in 1999 and several relevant standards have been developed within the last decade. Cognitive radio ...