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Activity recognition plays an important role in human-computer interactions. Recently, Channel State Information (CSI), known as a fine-grained information capturing the properties of WiFi signal propagation, has been widely used for activity recognition in a device-free pattern. Since CSI is much sensitive to ambient changes, CSI can be used as fingerprints as human activities. However, existing...
This paper introduces a new kind of data hub that is used for evaluation experiments of electrical devices. The hubs not only bridge the real-time data flow between on-site experimental equipment to central servers, but also solve the problem of data normalization. The design of the hub also considers the security issues and data protection in power grid internal network. According to the result of...
Device to device (D2D) communication is expected to become a promising technology of the next-generation wireless communication systems. Security issues have become technical barriers of D2D communication due to its “open-air” nature and lack of centralized control. Generating symmetric keys individually on different communication parties without key exchange or distribution is desirable but challenging...
In this paper, we propose a novel complexity-adjustable video coding algorithm for H.264/AVC-based wireless video communications through portable devices. To optimize the rate-distortion performance under power constraint in packet loss environment, we present a novel model that can adapt to the different channel conditions and computation power constraints. The experimental results demonstrate that...
We propose and demonstrate a novel architecture of converged 32QAM-OFDM ROF and WDM-OFDM-PON by employing an integrated modulator. The 10Gb/s 16QAM-OFDM wired signal, 1Gb/s 32QAM-OFDM wireless signal and upstream signal are transmitted 25km fiber successfully.
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