Multicarrier Communication Techniques for Spectrum Sensing and Communication in Cognitive Radios
In this tutorial article, we review different multicarrier communication methods for cognitive radio (CR) systems. There, the secondary users (SUs) need to (a) dynamically and reliably determine spectral holes and (b) transmit data in these resources without interfering with other parts of the frequency band. To satisfy (a), each SU has to be equipped with […]
CUBA-An Architecture for Efficient CPU Data Communication
Data-parallel co-processors have the potential to improve performance in highly parallel regions of code when coupled to a generalpurpose CPU. However, applications often have to be modified in non-intuitive and complicated ways to mitigate the cost of data marshalling between the CPU and the co-processor. In some applications the overheads cannot be amortized and co-processors […]
Applied High Tc Superconducting Electrical Machines
Superconductivity is key technology for 21st century. To suppress emission of green house effect gas, applied superconductivity is important. In this paper, the current status of superconducting power machines such as generator and motor are described. Most of all studies are the step of demonstration of idea and possibility. There are large gap between physical […]