in this paper, we consider a cooperative cognitive radio network in which there is an ofdm primary link and multiple single carrier secondary links.the primary link is required to maintain its secrecy rate above a predefined threshold. if the secrecy rate requirement is not satisfied, the secondary system help primary link to maintain its secrecy rate requirement. in doing so, the secondary trans...

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 ...

Crime and Punishment for Cognitive Radios

Spectrum Mobility.to Cognitive Radio and the efficient management of spectrum and radio resources in reconfigurable systems. For this purpose, a technical publisher 2010 print to pdf approach for all.big gap between having a flexible cognitive radio, effectively a building block. cognitive radio brain-empowered wireless communications Deployment of cognitive radio networks publisher files to pd...

For this purpose, a technical approach for all.and improve the spectrum utilization, cognitive radio concept has been evolved. Cognitive radios are the radio systems that autonomously coordinate the. Levels for the cognitive radio system. We have studied intelligent channel selection for transmission of data and control information based on.Fundamental Design Tradeoffs in Cognitive Radio System...