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In recent years, there has been a growing interest in green cellular networks for the sake of reducing the energy dissipated by communications and networking devices, including the base stations (BSs) and battery-powered user terminals (UTs). This paper investigates the joint employment of cognition and cooperation techniques invoked for improving the energy efficiency of cellular networks. To be...
A range of applications in cognitive radio networks, from adaptive spectrum sensing to predictive spectrum mobility and dynamic spectrum access, depend on our ability to foresee the state evolution of radio spectrum, raising a fundamental question: To what degree is radio spectrum state (RSS) predictable? In this article we explore the fundamental limits of predictability in RSS dynamics by studying...
In this paper, we identify and analyze the tradeoff between security and reliability for wireless communications in the presence of eavesdropping attack. Typically, we assume that both destination and the eavesdropper can only obtain channel state information with estimation errors, instead of perfect channel estimation predominantly assumed in the literature. Linear minimum mean-square error estimation...
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