The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Collaborative sensing is an available technology to increase access opportunity for unused spectrum and avoid interference to the primary users in cognitive radio networks. Due to the complexity of wireless environment and the primary user's location is unknown, the sensing performance will be affected by many unfavorable factors such as multipath fading, shadowing, and so on. Especially, some secondary...
In order to make up the shortage of mine cable monitoring system, and build the coal mine internet of things more quickly. The gas wireless monitoring system was designed by using cc2430 which was used to build Wireless Sensor Networks(WSNs), and combining MCU technology, sensor technology, store display and CAN bus communication technology. The overall framework of the system was given, and the WSNs...
According to construct the mine gas wireless sensor system and overcome shortcomings of low accuracy, bad mobiLity and no information networking function that existing in conventional gas detectors, an intelLigent gas perception instrument (GPI) based on non-dispersive infrared detection (NDIR) and microwave RF communication technology was designed. The detailed design of GPI`s hardware and software...
This paper proposes two optimal power allocation (OPA) schemes for two-hop wireless relay networks operating in amplify-and-forward (AAF) manner. All the relay nodes in the network participate in relaying information from the source to the destination. We explore the OPA schemes among the cooperative relays to maximize the received SNR at the destination. When the instantaneous channel state information...
In wireless sensor network, it is essential to find effective means for power control of randomly distributed nodes. In this paper, based on diverse receiving QoS parameters, a fuzzy algorithm for peer to peer power control of wireless sensor nodes is proposed. Simulation results show that the proposed algorithm reduces packet error rate (PER) and prolongs survival time of network, compared with fixed...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.