Abstract
Cognitive radio (CR) technology is envisaged to solve the problems in wireless networks resulting from the limited available spectrum and the inefficiency in the spectrum usage by exploiting the existing wireless spectrum opportunistically. In this paper, intrinsic properties and research on software defined cognitive radio (SDCR) are presented. Firstly brief introduction of Cognitive Radio is given along with its architecture. Then spectrum management of Cognitive Radio ad hoc networks (CRAHNs) and their main features like spectrum sensing, spectrum decision, spectrum selection and spectrum mobility are defined. At the end, Software Defined Cognitive Radio (SDCR), its hardware and software platform, along with research topics on SDCR are defined
Highlights
The advent of software defined radio (SDR) [1] technology offers a more sophisticated form of processing resources than prior radio technology
The architecture of Cognitive Radio (CR) is shown in fig. 2. at the right side of the fig. we see that SDR processing structure is accomplished in this architecture and right side of the fig. shows components involved in augmenting an SDR architecture to allow for cognitive capabilities
Radio spectrum is valuable resource in wireless communication systems, and it has been the focus of many research and development efforts over trhe last several decades
Summary
The advent of software defined radio (SDR) [1] technology offers a more sophisticated form of processing resources than prior radio technology. SDR can be defined as a mechanism in which user reconfigure radio software dynamically to fulfill the requirements of the user.
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