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In this work, we maximize the secrecy rate of the wireless-powered untrusted amplify-and-forward relay networks by jointly designing power splitting (PS) ratio and relay beamforming with the proposed global optimal algorithm (GOA) and local optimal algorithm (LOA). To guarantee secure communication, the destination-based artificial noise is sent to degrade the reception of the untrusted relay, and...
Digital displays, as the replacement of traditional static signs, have gained increasing popularity for out-of-home advertising. Latest advancements in smartphone, wireless communication, and digital display technologies make it possible to design new interactive signage systems linking the digital content with the physical digital displays. Although recent studies have demonstrated the trend of cyber-physical...
A compact planar inverted-F antenna (PIFA) with a simple feed structure in lower ultra-wideband (3.1∼4.9 GHz) is presented for BAN (Body Area Network) applications. A tapered patch and a folded ground plane are employed to improve the narrow bandwidth characteristics of traditional PIFA, in addition, the proposed antenna is low-profile with the thickness of 7 mm and compact with the area of 60 × 22...
Digital signages are increasingly common for out-of-home advertising. Latest advancements in smart phones, wireless communication and displays make it possible to design smarter interactive signage systems for more effective advertising. Although existing research have started a trend of cyber-physical interactions, they are generally not scalable for multiple users and not intuitive to interact with...
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