Power efficiency issues are investigated across layers for use in tactical communications among battery-operated wireless sensor networks (WSNs) and wireless MANET nodes. Fundamental limits, practical guidelines, specific algorithms at the physical, data link, and application layers as well as performance analysis of tactical networks are developed when power optimization (as opposed to, e.g., throughput or delay, pursued by existing approaches) is the ultimate goal. Challenges addressed include the harsh interference ...
In the emerging paradigm of open spectrum access, cognitive radios dynamically sense the radio-spectrum environment and must rapidly tune their transmitter parameters to efficiently utilize the available spectrum. The unprecedented radio agility envisioned, calls for fast and accurate spectrum sensing over a wide bandwidth, which challenges traditional spectral estimation methods typically operating at or above Nyquist rates. Capitalizing on the sparseness of the signal spectrum in open-access networks, this paper ...
Reports by Author
