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Robust and low-communication geographic routing for wireless ad hoc networksWitt, Matthias January 2008 (has links)
Zugl.: Hamburg, Techn. Univ., Diss., 2008
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Performance Models for UMTS 3.5G Mobile Wireless Systems / Leistungsmodelle für UMTS 3.5G MobilfunksystemeMäder, Andreas January 2008 (has links) (PDF)
Mobile telecommunication systems of the 3.5th generation (3.5G) constitute a first step towards the requirements of an all-IP world. As the denotation suggests, 3.5G systems are not completely new designed from scratch. Instead, they are evolved from existing 3G systems like UMTS or cdma2000. 3.5G systems are primarily designed and optimized for packet-switched best-effort traffic, but they are also intended to increase system capacity by exploiting available radio resources more efficiently. Systems based on cdma2000 are enhanced with 1xEV-DO (EV-DO: evolution, data-optimized). In the UMTS domain, the 3G partnership project (3GPP) specified the High Speed Packet Access (HSPA) family, consisting of High Speed Downlink Packet Access (HSDPA) and its counterpart High Speed Uplink Packet Access (HSUPA) or Enhanced Uplink. The focus of this monograph is on HSPA systems, although the operation principles of other 3.5G systems are similar. One of the main contributions of our work are performance models which allow a holistic view on the system. The models consider user traffic on flow-level, such that only on significant changes of the system state a recalculation of parameters like bandwidth is necessary. The impact of lower layers is captured by stochastic models. This approach combines accurate modeling and the ability to cope with computational complexity. Adopting this approach to HSDPA, we develop a new physical layer abstraction model that takes radio resources, scheduling discipline, radio propagation and mobile device capabilities into account. Together with models for the calculation of network-wide interference and transmit powers, a discrete-event simulation and an analytical model based on a queuing-theoretical approach are proposed. For the Enhanced Uplink, we develop analytical models considering independent and correlated other-cell interference. / Die vorliegende Arbeit beschäftigt sich mit Mobilfunksystemen der Generation 3.5 im Allgemeinen, und mit den UMTS-spezifischen Ausprägungen HSDPA (High Speed Downlink Packet Access) und HSUPA (High Speed Uplink Packet Access) bzw. Enhanced Uplink im speziellen. Es werden integrierte Systeme betrachtet, d.h. 3.5G Datenkanäle koexistieren mit "klassischen" UMTS Datenkanälen wie in den Spezifikationen von UMTS Release ´99 beschrieben.
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Radio resource management for integrated services in multi-radio access networksPiao, Guihua January 2006 (has links)
Zugl.: Kassel, Univ., Diss., 2006
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Radio resource management for integrated services in multi-radio access networksPiao, Guihua January 2006 (has links)
Zugl.: Kassel, Univ., Diss., 2006 / Download lizenzpflichtig
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Signal processing, channel estimation and link adaptation in MIMO-OFDM systemsRan, Jianjun January 2008 (has links)
Zugl.: Hamburg, Techn. Univ., Diss., 2008
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Emulationskonzepte für Mobilfunk- und Ad-Hoc-NetzeDudkowski, Dominique. January 2002 (has links)
Stuttgart, Univ., Diplomarb., 2002.
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Datentyp- und Interfaceeditor für Mobilfunkprotokolle auf der Basis von XMLVogler, Tobias. January 2003 (has links)
Konstanz, FH, Diplomarb., 2003.
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Performance Models for UMTS 3.5G Mobile Wireless SystemsMäder, Andreas January 2008 (has links)
Zugl.: Würzburg, Univ., Diss., 2008.
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Spectral PLL Built-In Self-Test for integrated cellular transmitters = Spektraler PLL-Selbsttest für integrierte MobilfunktransmitterMünker, Christian January 2010 (has links)
Zugl.: Erlangen-Nürnberg, Univ., Diss., 2010.
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Quality enhancement in mobile terrestrially received analog and digital video signalsFriebe, Markus Hans. January 2007 (has links) (PDF)
Erlangen, Nürnberg, Univ., Diss., 2007.
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