@inproceedings{833, author = {{Valentin, Stefan and von Malm, Holger and Karl, Holger}}, booktitle = {{Proceedings of the IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2007, 3-7 September 2007, Athens, Greece}}, pages = {{1----6}}, title = {{{Traffic-Aware Asymmetric Cooperation Diversity for Media Streaming in Wireless Networks}}}, doi = {{10.1109/PIMRC.2007.4394223}}, year = {{2007}}, } @inproceedings{834, author = {{S. Lichte, Hermann and Valentin, Stefan and Eitzen, Falk and Stege, Matthias and Unger, Carsten and Karl, Holger}}, booktitle = {{3rd International ICST Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities, TridentCom 2007, Orlando, Florida, USA, May 21-23 2007}}, pages = {{1----9}}, title = {{{Integrating multiuser dynamic OFDMA into IEEE 802.11a and prototyping it on a real-time software-defined radio testbed}}}, doi = {{10.1109/TRIDENTCOM.2007.4444671}}, year = {{2007}}, } @inproceedings{835, author = {{Valentin, Stefan and Karl, Holger}}, booktitle = {{IEEE Wireless Communications and Networking Conference, WCNC 2007, Hong Kong, China, 11-15 March, 2007}}, pages = {{896----901}}, title = {{{Effect of User Mobility in Coded Cooperative Systems with Joint Partner and Cooperation Level Selection}}}, doi = {{10.1109/WCNC.2007.170}}, year = {{2007}}, } @inproceedings{836, author = {{Marie Feeney, Laura and Cetin, Bilge and Hollos, Daniel and Kubisch, Martin and Mengesha, Seble and Karl, Holger}}, booktitle = {{Wired/Wireless Internet Communications, 5th International Conference, WWIC 2007, Coimbra, Portugal, May 23-25, 2007, Proceedings}}, pages = {{201----212}}, title = {{{Multi-rate Relaying for Performance Improvement in IEEE 802.11 WLANs}}}, doi = {{10.1007/978-3-540-72697-5_17}}, year = {{2007}}, } @inproceedings{1015, author = {{Valentin, Stefan and Karl, Holger}}, booktitle = {{Proc. of the European Wireless Conference (EW)}}, title = {{{Analyzing the effect of asymmetric mobility and channel configurations on the outage performance of coded cooperative systems}}}, year = {{2007}}, } @article{1018, author = {{Valentin, Stefan and Lichte, Hermann S and Karl, Holger and Simoens, Sebastien and Vivier, Guillaume and Vidal, Josep and Agustin, Adrian}}, journal = {{Cognitive Wireless Networks}}, pages = {{155----178}}, title = {{{Implementing cooperative wireless networks}}}, doi = {{10.1007/978-1-4020-5979-7_8}}, year = {{2007}}, } @techreport{2518, author = {{Valentin, Stefan and von Malm, Holger and Karl, Holger}}, title = {{{Evaluating the GNU Software Radio platform for wireless testbeds}}}, year = {{2006}}, } @inproceedings{2523, author = {{Valentin, Stefan and Lichte, Herman S. and Karl, Holger and Vivier, Guillaume and Simoens, Sebastien and Vidal, Josep and Agustin, Adrian and Aad, Imad}}, title = {{{Cooperative wireless networking beyond store-and-forward: Perspectives for PHY and MAC design}}}, year = {{2006}}, } @inproceedings{2526, author = {{Dannewitz, Christian and Berg, Stefan and Karl, Holger}}, booktitle = {{ Proc. of the Wireless World Research Forum Meeting }}, title = {{{An IEEE 802.21-based Universal Information Service }}}, year = {{2006}}, } @proceedings{17417, abstract = {{We present a parallel algorithm for the rendering of complex three-dimensional scenes. The algorithm runs across heterogeneous architectures of PC-clusters consisting of a visualization-node, equipped with a powerful graphics adapter, and cluster nodes requiring weaker graphics capabilities only. The visualization-node renders a mixture of scene objects and simplified meshes (Reliefboards). The cluster nodes assist the visualization-node by asynchronous computing of Reliefboards, which are used to replace and render distant parts of the scene. Our algorithm is capable of gaining significant speedups if the cluster's nodes provide weak graphics adapters only. We trade the number of cluster nodes off the scene objects' image quality.}}, editor = {{Rammig, Franz-Josef and Dangelmaier, Wilhelm and Karl, Holger and Mertsching, Bärbel and Meyer auf der Heide, Friedhelm and Trächtler, Ansgar}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts}}, title = {{{Self-Coordinating Systems: The Next Challenge in Research on Distributed Systems}}}, year = {{2006}}, } @article{837, author = {{Hoene, Christian and Karl, Holger and Wolisz, Adam}}, journal = {{Int. J. Communication Systems}}, number = {{3}}, pages = {{299----316}}, title = {{{A perceptual quality model intended for adaptive VoIP applications}}}, doi = {{10.1002/dac.755}}, year = {{2006}}, } @article{838, author = {{Gross, James and Geerdes, Hans{-}Florian and Karl, Holger and Wolisz, Adam}}, journal = {{IEEE Journal on Selected Areas in Communications}}, number = {{3}}, pages = {{427----436}}, title = {{{Performance analysis of dynamic OFDMA systems with inband signaling}}}, doi = {{10.1109/JSAC.2005.862386}}, year = {{2006}}, } @inproceedings{840, author = {{Mattern, Friedemann and Karl, Holger and Römer, Kay}}, booktitle = {{Third European Workshop, {EWSN} 2006, Zurich, Switzerland, February 13-15, 2006, Proceedings}}, editor = {{R{\"{o}}mer, Kay and Karl, Holger and Mattern, Friedemann}}, isbn = {{3-540-32158-6}}, title = {{{Wireless Sensor Networks}}}, doi = {{10.1007/11669463}}, year = {{2006}}, } @inproceedings{1843, author = {{Aguiar, A. and Wolisz, A. and Lederer, H. and Karl, Holger}}, booktitle = {{Proceedings of the 11th European Wireless Conference 2005}}, title = {{{Channel-Adaptive Schedulers with State-of-the-Art Channel Predictors}}}, year = {{2005}}, } @book{841, author = {{Karl, Holger and Willig, Andreas}}, isbn = {{978-0-470-09510-2}}, title = {{{Protocols and architectures for wireless sensor networks}}}, year = {{2005}}, } @article{842, author = {{Ebert, Jean-Pierre and Hollos, Daniel and Karl, Holger and Löbbers, Marc}}, journal = {{Comput. J.}}, number = {{1}}, pages = {{72----83}}, title = {{{Does Multi-Hop Communication Reduce Electromagnetic Exposure?}}}, doi = {{10.1093/comjnl/bxh062}}, year = {{2005}}, } @article{843, author = {{Savoric, Michael and Karl, Holger and Schläger, Morten and Poschwatta, Tobias and Wolisz, Adam}}, journal = {{Computer Networks}}, number = {{2}}, pages = {{269----294}}, title = {{{Analysis and performance evaluation of the EFCM common congestion controller for TCP connections}}}, doi = {{10.1016/j.comnet.2005.01.012}}, year = {{2005}}, } @article{844, author = {{Gross, James and Valentin, Stefan and Karl, Holger and Wolisz, Adam}}, journal = {{European Transactions on Telecommunications}}, number = {{1}}, pages = {{37----49}}, title = {{{A study of impact of inband signalling and realistic channel knowledge for an example dynamic OFDM-FDMA system}}}, doi = {{10.1002/ett.1030}}, year = {{2005}}, } @article{845, author = {{Karl, Holger and Lentsch, Thomas and Ritter, Hartmut}}, journal = {{Praxis der Informationsverarbeitung und Kommunikation}}, number = {{2}}, pages = {{66----67}}, title = {{{Drahtlose Sensornetze}}}, doi = {{10.1515/PIKO.2005.66}}, year = {{2005}}, } @article{846, author = {{Willig, Andreas and Karl, Holger}}, journal = {{Praxis der Informationsverarbeitung und Kommunikation}}, number = {{2}}, pages = {{86----92}}, title = {{{Data Transport Reliability in Wireless Sensor Networks. A Survey of Issues and Solutions}}}, doi = {{10.1515/PIKO.2005.86}}, year = {{2005}}, }