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This letter proposes a probability-based scheme for combination of spectrum sensing information collected from cooperative cognitive radio users. The proposed scheme enables combination of both synchronous and asynchronous sensing information by utilizing the statistics of licensed band occupancy and is superior to conventional schemes in terms of detection performance.
Uncertainty almost exists in the measurements of sensors because of the influence of environment and communication. The uncertainties can be reflected in the loss of measurement data and in the unknown disturbance added on the sensor measurements. In this paper, a linear unbiased minimum variance state filter is designed for discrete-time linear stochastic systems with data loss and unknown disturbance,...
A smart space that can offer automatic services mainly relies on sensing devices to acquire contextual information, and on actuation devices to take responsive actions. Because such devices are usually fixed in some locations in the physical environment and canpsilat move by themselves, they can only sense information or act only in specific locations/directions. Different from these devices, are...
Lifelog is a data set composed of one or more media forms that record the same individualpsilas daily activities. One of the main challenging issues is how to extract meaningful information from the huge and complex lifelog data which is continuously captured and accumulated from multiple sensors. This study is focused on the activity models and analysis techniques to process lifelog data in order:...
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