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With the occurrence of Internet of Things (IoT) era, the proliferation of sensors coupled with the increasing usage of wireless spectrums especially the ISM band makes it difficult to deploy real-life IoT. Currently, the cognitive radio technology enables sensors transmit data packets over the licensed spectrum bands as well as the free ISM bands. The dynamic spectrum access technology enables secondary...
In wireless personal area network, a channel is shared by a number of nodes. Therefore packet collision may take place which degrades the system performance. To enhance the performance of slotted carrier sense multiple access (CSMA/CA) for IEEE 802.15.4 wireless sensor networks, we propose a collision-aware backoff algorithm (CABEB), which can dynamically select a suitable backoff period based on...
Control systems with long distance sensor and actuator wiring have the problem of high system cost and increased sensor noise. Wireless sensor network (WSN)-based control systems are an alternative solution involving lower setup and maintenance costs and reduced sensor noise. However, WSN-based control systems also encounter problems such as possible data loss, irregular sampling periods (due to the...
A novel robust detection algorithm based on goodness-of-fit test is proposed to achieve spectrum sensing for the small-scale primary users (SSPUs) including wireless microphones and mobile devices. In the proposed algorithm, a new test statistic is proposed to measure the non-Gaussianity of the power spectral density (PSD) of the received signals. Since the estimated PSD of the ambient Gauss noise...
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