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This volume explores cognitive radio (CR) -- a prominent area in wireless communication that has emerged over the last ten years. The text discusses the enormous cognitive radio applications in next generation wireless networks, in addition to related technologies.

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This book provides a broad introduction to Cognitive Radio, which attempts to mimic human cognition and reasoning applied to Software Defined Radio and reconfigurable radio over wireless networks. It provides readers with significant technical and practical insights into different aspects of Cognitive Radio, starting from a basic background, the principle behind the technology, the inter-related technologies and application to cellular and vehicular networks, the technical challenges, implementation and future trends. The discussion balances theoretical concepts and practical implementation. Wherever feasible, the different concepts explained are linked to application of the corresponding scheme in a particular wireless standard.

This book has two sections: the first section begins with an introduction to cognitive radio and discusses in detail various, inter-dependent technologies such as network coding, software-based radio, dirty RF, etc. and their relation to cognitive radio. The second section deals with two key applications of cognitive radio - next generation cellular networks and vehicular networks. The focus is on the impact and the benefit of having cognitive radio-based mechanisms for radio resource allocation, multihop data transmission, co-operative communication, cross-layer solutions and FPGA-level framework design, as well as the effect of relays as cognitive gateways and real-time, seamless multimedia transmission using cognitive radio.

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Part I: Cognitive Radio and Radio Spectrum.- Introduction to Cognitive Radio.- Spectrum Usage Models for the Analysis, Design and Simulation of Cognitive Radio Networks.- Bandwidth Efficient Co-operative Spectrum Sensing.- Emergency Networking in Licensed Spectrum using Cognitive Radios: Challenges and Insights.- Signature Detection for Context Awareness in Cognitive Radio Networks.- Generalized Eigen-value Based Spectrum Sensing.- Part II: Cognitive Radio for Wireless and Cellular Networks.- From Self Organizing to Cognitive Networks: How Can the Cellular Operator Make Use of the Cognitive Paradigm?.- Signal Separation for Cognitive Wireless Communications.- Towards Cognitive Networking: Automatic Wireless Network Recognition Based on MAC Feature Detection.- Spectrum Allocation in Cognitive Radio Networks using Evolutionary Algorithms.- Radio Resource Allocation for Cognitive Radio-based Ad Hoc Wireless Networks.- Next Generation Cognitive Cellular Networks, LTE, WiMAX and Wireless Broadband Access.- Cognitive Capabilities for Femtocell Networks: Cognitive Femtocells.- Interference Modeling, Shaping and Avoidance in Cognitive Wireless Networks.- System Design and FPGA Implementation for a Cognitive Radio Wireless Device.

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