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WiFi signals based applications, such as indoor localization, human activity recognition and trace tracking, have been increasing attention in the past decade. WiFi signals are sensitive to the change of indoor environment, so the above mentioned applications encounter challenges which contain dynamic indoor environment, device diversity and motion influence. We mainly survey techniques of motion...
This paper presents an experimental study on wireless power delivery to low-power mobile devices based on retro-reflective beamforming. In our scheme, a pilot signal comprised of an impulse train is broadcasted from a mobile device. The wireless charger analyzes the received pilot signal, and then accordingly constructs a focused power beam onto the mobile device. In our experiments, 14 mW out of...
This letter presents an experimental study on wireless power delivery to low-power mobile devices based on retro-reflective beamforming. In our scheme, a pilot signal composed of an impulse train is broadcast from a mobile device. The pilot signal is received and analyzed by a wireless charger that includes four antenna elements. Then, according to the analysis outcome, the wireless charger constructs...
The mobile internet services are not as ??the Internet on your phone??, specific algorithms should been designed and implemented so that they adapt to the devices, mobile/wireless networks and mobile operators, and match the user profiles to the diversity of contents structures. Personalization appears to be the most appropriate solution to this need. It comes into aid by creating personalized portals...
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