Nitride-based Cold Cathodes for Minature and Rugged Electron Sources
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AbstractNot Available Maximizing the use of available frequency spectrum is crucial for both military and commercial systems today. The class of waveforms called Continuous Phase Modulation (CPM) signaling, with Gaussian Minimum Shift Keying (GMSK) as a specific instantiation, have been shown to be highly efficient in both spectral and power use. Such time-bandwidth efficient receivers are typically very complex, however, particularly when real-world effects are taken into account. Reduced complexity implementations are required for any practical applications of these waveforms. A recent, novel approach to time-bandwidth efficiency utilizing Per Survivor Processing (PSP) offers the opportunity to achieve large capacity improvements in real-world environments (including interference/jamming, dynamics, multipath, and channel non-linearities) while simultaneously reducing implementation complexity. PSP will be combined with other reduced complexity techniques to provide a highly efficient, yet practical design. In addition to analysis, simulation, and architecture development, a hardware demonstration of key aspects of the derived approach will be supplied.
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