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Smartphone theft is a non-negligible problem that causes serious concerns on personal property, privacy, and public security. The existing solutions to this problem either provide only functions like retrieving a phone, or require dedicated hardware to detect thefts. How to protect smartphones from being stolen at all times is still an open problem. In this paper, we propose iGuard, a real-time anti-theft...
Mobile crowdsourcing is deemed as a powerful technique to solve traditional problems. But the crowdsourced data from smartphones are generally low quality, which can induce crucial challenges and hurt the applicability of crowdsourcing applications. This paper presents our study to address such challenges in a concrete application, namely, floorplan generation. Existing proposals mostly rely on infrastructural...
It is a challenge to detect and identify the targets in the foliage-penetration environment. Radar is superior to other sensors in this poor visibility condition. The micro-Doppler signature is one of the most prominent information for target classification and identification in radar applications. In this paper, a complete procedure is proposed for human micro-Doppler signature extraction in the...
Mobile crowdsourcing is deemed as a powerful technique to solve traditional problems. But the crowdsourced data from smartphones are generally with low quality, which induce crucial challenges and hurt the applicability of crowdsourcing applications. This paper presents our study to address such challenges in a concrete application, namely floorplan generation. In order to utilize pedestrians' traces...
The use of ultra wideband radar for security systems is of interest because of the high range resolution. Much research has focused on developing effective methods for detecting, locating, tracking and imaging a human body with multiple radar systems. One important challenge in this field is how to handle data for multiple targets, because many conventional algorithms assume only a single target....
Novel target association approach for indoor human tracking is designed for the multistatic ultra-wideband (UWB) radar. A new concept, namely range-Doppler video sequence, is proposed to describe the slow-time evolution of human movement in range-Doppler domain. We apply the video time density function to model human movement dynamics of range-Doppler video sequences in slow time. Sliding window correlation...
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