In this paper, the authors present an open-source Serial ATA core designed for Virtex-4 FPGAs. This core utilizes the RocketIO Multi-Gigabit Transceiver (MGT) of the Virtex-4 to interface with hard drives at SATA Generation 1 (SATA I, 1.5 Gb/s) and Generation 2 (SATA II, 3.0 Gb/s) speeds. A full design hierarchy from host software to ...

Spectrum sensing, spectrum decision, spectrum sharing, and spectrum mobility are four major functions of Cognitive Radio (CR) systems. Spectrum sensing is utilized to identify primary users’ spectrum occupancy status, based on which CR users can dynamically access the available channels through the regulation processes of spectrum decision, spectrum sharing, and spectrum mobility. To alleviate the ...