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Received signal strength (RSS) based localization schemes can be categorized as device-based localization (DBL) and device-free localization (DFL) in terms of the target to be located. DBL transforms RSS measurements of anchor-tag links to ranges and then obtains the target's position through trilateration. DFL infers an attenuation image from the target's body shadowing and regards the position with...
Device-free localization (DFL) localizes the target by employing the variation of received signal strength (RSS) due to the presence of the target which wears no device. The existing fingerprint-based DFL (FDFL) method simply compares the online RSS variations with the radio map and does not care about how RSS variation is caused. However, we have found that when some links are shadowed by the target,...
To accurately localize the target, wireless positioning systems use range measurements from different anchors, which are deployed around the monitored region in advance. In most applications where the target such as a human body has a certain volume, the target will shadow the wireless links comprised of the anchors, making the received signal strength (RSS) of these links suffer great loss. Therefore,...
This paper presents a SoC (System on Chip) dedicated for human alimentary canal pH and temperature monitoring. Sensor interfaces, wireless transceiver, digital logic and power management circuits are all embedded in this SoC. The SoC was fabricated in 0.18μm standard CMOS technology and the area is about 9mm2. The SoC takes 6.15mW power at the data collection and transmission mode. The measurement...
Radio tomographic imaging (RTI) is a promising technique which allows localizing and tracking targets carrying no electronic devices. It utilizes the attenuation of wireless links to generate images of the change in the propagation field. Objects that obstruct the wireless signals in the field will lead to bright blobs in RTI image. For multi-target tracking, we employ clustering to obtain cluster...
This paper presents a smart capsule for in body pH and temperature continuous monitoring in non-invasive gastrointestinal examination. The capsule offers 24-hour continuous monitoring with less discomfort compared with conventional diagnosis. The whole system consists of a smart capsule for pH value and temperature sensing, and a portable data logger. The sensing part of the smart capsule includes...
With the rapid development of university informatization, the importance and complexity of data center construction are gradually increasing, by applying cloud computing technology and centralized way, which will provide convenient, safe, high availability, flexible IT resources services for the college, thus effectively utilize resources, increase service capacity and service level of data center.
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