Sökning: "Wireless Channels"
Visar resultat 1 - 5 av 192 avhandlingar innehållade orden Wireless Channels.
1. 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
2. MIMO Channels - Measurements and Analysis
Sammanfattning : Providing increased transmission speed, quality and an efficient spectrum utilization is crucial for high speed wireless services of today and the future. This thesis is a collection of papers that address an important step in that direction -- the utilization of the spatial domain of the wireless channel. LÄS MER
3. Limited Feedback Information in Wireless Communications : Transmission Schemes and Performance Bounds
Sammanfattning : This thesis studies some fundamental aspects of wireless systems with partial channel state information at the transmitter (CSIT), with a special emphasis on the high signal-to-noise ratio (SNR) regime. The first contribution is a study on multi-layer variable-rate communication systems with quantized feedback, where the expected rate is chosen as the performance measure. LÄS MER
4. Characterization of Single- and Multi-antenna Wireless Channels
Sammanfattning : The wireless propagation channel significantly influences the received signal, so that it needs to be modeled effectively. Extensive measurements and analysis are required for investigating the validity of theoretical models and postulating new models based on measurements. Such measurements, analysis, and modeling are the topic of this thesis. LÄS MER
5. Design Space Exploration of Wireless Multihop Networks
Sammanfattning : This thesis explores the feasible design space of wireless multihop networks and identifies fundamental design parameters. In the process of exploring it is important to ignore all details and instead take a holistic view. LÄS MER