Browsing NTNU Open by Author "Øien, Geir Egil"
Now showing items 1-16 of 16
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Application of UWB Technology for Positioning, a Feasibility Sudy
Canovic, Senad (Master thesis, 2007)Ultra wideband (UWB) signaling and its usability in positioning schemes has been discussed in this report. A description of UWB technology has been provided with a view on both the advantages and disadvantages involved. ... -
Energy-Efficient Link Adaptation and Resource Allocation in Energy-Constrained Wireless Ad Hoc Networks
Krogsveen, Even (Master thesis, 2007)Wireless ad hoc networks have a number of advantages over traditional, infrastructure-based networks. Robustness and easy deployment are two of the main advantages. However, the distributed nature of such networks raises ... -
Increasing sum-rate in large-scale cognitive radio networks by centralized power and spectrum allocation
Vijayandran, Luxmiram; Byun, Sang-Soon; Øien, Geir Egil; Ekman, Torbjörn (Journal article; Peer reviewed, 2012)We revisit the widely investigated problem of maximizing the centralized sum-rate capacity in a cognitive radio network. We consider an interference-limited multi-user multi-channel environment, with a transmit sum-power ... -
Opportunistic scheduling policies for improved throughput guarantees in wireless networks
Rasool, Jawad; Hassel, Vegard; de Ryhove, Sébastien de la Kethulle; Øien, Geir Egil (Journal article; Peer reviewed, 2011)Offering throughput guarantees for cellular wireless networks, carrying real-time traffic, is of interest to both the network operators and the customers. In this article, we formulate an optimization problem which aims ... -
Optimizing the performance of non-fading and fading networks using CSMA with joint transmitter and receiver sensing
Kaynia, Mariam; Øien, Geir Egil (Journal article; Peer reviewed, 2012)We consider a mobile ad hoc network where packets belonging to specific transmitters arrive randomly in space and time according to a 3-D Poisson point process, and are upon arrival transmitted to their intended destinations ... -
Packet Scheduling Algorithms for Wireless Networks
Børve, Bjørn Hovland (Master thesis, 2008)The evolution of services offered using communication technology has yielded a jungle of different services. Many of these services exhibits different QoS requirements; different requirements to delay, probability of ... -
Performance Analysis of ALOHA and CSMA in Spatially Distributed Wireless Networks
Kaynia, Mariam (Master thesis, 2007)In this thesis the performance of the ALOHA and CSMA MAC protocols are analyzed in spatially distributed wireless networks. The main measurement metric used is probability of outage, a metric that is referred to in most ... -
Power Allocation In Cognitive Radio
Canto Nieto, Ramon (Master thesis, 2008)One of the major challenges in design of wireless networks is the use of the frequency spectrum. Numerous studies on spectrum utilization show that 70% of the allocated spectrum is in fact not utilized. This guides researchers ... -
Progressive Image Transfer and Handheld Devices in Emergency Communications
David-Andersen, Jan Peder (Master thesis, 2008)Image communications solutions tailored for Crisis Management are today needed and requested by many. The availability of such solutions are however limited. In this project we improve an existing Emergency Communications ... -
Radio Planning and Coverage Prediction of Mobile WiMAX in Trondheim
Monrad-Hansen, Jens Wiel (Master thesis, 2009)Challenged by the LTE system, Mobile WiMAX is set to be the next generation broadband wireless system. Providing high data rates over large distances gives unlimited possibilities for services provided to the end users. ... -
Radio Resource Allocation for Increased Capacity in Cellular Networks
Dybdahl, Sigbjørn Hernes (Master thesis, 2007)Cellular networks are widely deployed for wireless communication, and as the number of users of these networks increase, so does the need for higher spectral efficiency. Clever measures have to be taken in order to increase ... -
Radio resource allocation for increased capacity in cellular networks
Syvertsen, Eivind (Master thesis, 2007)We analyze some previous work on the field regarding binary power allocation for a distributed power allocation algorithm for multicell capacity gain. We implement a Monte Carlo simulation tool to calculate numerically the ... -
The Optimal Packet Duration of ALOHA and CSMA in Ad Hoc Wireless Networks
Corneliussen, Jon Even (Master thesis, 2009)In this thesis the optimal transmission rate in ad hoc wireless networks is analyzed. The performance metric used in the analysis is probability of outage. In our system model, users/packets arrive randomly in space and ... -
Turbokoding basert på parallell konkatenering av konvolusjonskoder
Nordahl, Christian (Master thesis, 2008)Turbokoder er en familie av feilkorrigerende koder som først og fremst er kjent for å kunne opprettholde god ytelse ved svært lave signal-til-støy forhold. Denne masteroppgaven tar utgangspunkt i prosjektoppgaven fra i ... -
WISA vs. WLAN: Co-existence challenges: - A tool for WLAN performance testing
Strand, Erlend Barstad (Master thesis, 2007)Wireless Interface for Sensors and Actuators (WISA) is ABB's proprietary wireless protocol for industrial automation on the factory floor. It operates in the 2.4GHz ISM band. Wireless Local Area Networks (WLANs), which ... -
WISA vs. WLAN: Co-existence challenges: Analysis of frequency-hopping sequences
Sandnes, Erik Skarstein (Master thesis, 2007)Wireless Interface for Sensors and Actuators (WISA) is ABB s proprietary wireless protocol for industrial automation. It operates in the 2.4 GHz ISM band, as do nearly allWireless LAN systems. WISA does frequency-hopping ...