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Traditional cryptographic secret key establishment mechanisms are facing challenges with the fast growth of high-performance computing, and can be very costly in many settings, e.g. in wireless ad-hoc networks, since they consume scarce resources such as bandwidth and battery power. As an alternative, link-signature-based (LSB) secret key extraction techniques have received many interests in recent...
Opportunistic spectrum sharing (OSS) and cooperative spectrum sharing (CSS) are typical dynamic spectrum accessing (DSA) technologies to effectively improve spectrum efficiency (SE) and energy efficiency (EE). However, OSS provides no benefit to the primary user, whereas CSS, although simultaneously improving SE of the primary user and the secondary user, needs a proper cooperative mechanism with...
Cognitive-radio-networks with multiple input multiple output is an effective method to improve spectrum efficiency. Linear pre-coders is a crucial technology to realize this goal. However, most of existing algorithm developed based on the Gaussian input assumption. This assumption limited the application of linear precoding and caused great performance loss. In this paper, for such a problem, a linear...
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