Transmission Methods for Wireless Multi CarrierSystems in Time-Varying EnvironmentsDISSERTATIONzur Erlangung des akademischen Grades einesDOKTOR-INGENIEURS(DR.-ING.)der Fakulta¨t fu¨r Ingenieurwissenschaftenund Informatik der Universita¨t UlmvonMatthias Karl Wetzaus SigmaringenGutachter: Prof.Dr.-Ing. Ju¨rgen LindnerProf.Dr. Hermann RohlingAmtierender Dekan: Prof.Dr.-Ing. Klaus DietmayerUlm, 30. September2011AcknowledgmentsFirst, I would like to thank my supervisor Prof. Ju¨rgen Lindner for giving me the op-portunity to join his research team and providing a fruitful scientific environment atthe Institute of Information Technology at the University of Ulm. During the years, Icould greatly benefit from his expertise and experience. Furthermore, I would like toexpressmy gratitude to Prof. Hermann Rohling for acting as second examiner.My special thanks go also to Dr. Werner Teich who significantly contributed to thequality of this work by sharing his knowledge and ideas with me. I would also liketo say thank you to all my former colleagues for the numerous discussions and thefriendly atmosphere at the institute.