Sökning: "Wireless sensor network"
Visar resultat 1 - 5 av 140 avhandlingar innehållade orden Wireless sensor network.
1. Design and Performance of Diversity based Wireless Interfaces for Sensor Network Nodes
Sammanfattning : The main focus of the work presented in this licentiate thesis concerns antenna design, adaptive antenna control and investigation on how the performance of small wireless nodes can be increased by inclusion of multiple antennas. In order to provide an end-user suitable solution for wireless nodes the devices require both small form factor and good performance in order to be competitive on the marked and thus the main part of this thesis focuses on techniques developed to achieve these goals. LÄS MER
2. Wireless Sensor Network Positioning Techniques
Sammanfattning : Position information is one of the key requirements for wireless sensor networks(WSNs). Since GPS receivers have drawbacks when used in low-power sensor nodes,mainly due to latency in position recovery and limited access to GPS satellites in indoor-type scenarios, extracting the position information by means of the network itself, so-called positioning or localization, has been considered an eective solution for the posi-tioning problem. LÄS MER
3. Energy Constrained Wireless Sensor Networks : Communication Principles and Sensing Aspects
Sammanfattning : Wireless sensor networks are attractive largely because they need no wired infrastructure. But precisely this feature makes them energy constrained, and the consequences of this hard energy constraint are the overall topic of this thesis. LÄS MER
4. Traffic Analysis, Modeling and Their Applications in Energy-Constrained Wireless Sensor Networks : On Network Optimization and Anomaly Detection
Sammanfattning : Wireless sensor network (WSN) has emerged as a promising technology thanks to the recent advances in electronics, networking, and information processing. A wide range of WSN applications have been proposed such as habitat monitoring, environmental observations and forecasting systems, health monitoring, etc. LÄS MER
5. Using Existing Infrastructure as Support for Wireless Sensor Networks
Sammanfattning : Denna avhandling handlar om hur befintliga datorinfrastrukturer i t.ex. sjukhus och industrier kan avlasta sensornätverk med energikrävande uppgifter. Vi har forskat på olika aspekter som gör det möjligt att förlänga livslängden på dessa sensornätverk. LÄS MER