Thomas Kaiser is a Professor at the University of Duisburg-Essen- Germany. He is also a Co-Leader of the Smart Antenna Research Team at Gerhard-Mercator University, Duisburg, Germany. In Summer 2005, he was a visiting professor in the Smart Antenna Research Group, Stanford University, USA. He holds a PhD in Communications (with distinction), Gerhard-Mercator University Duisburg, Germany (1991-1995). Dr. Kaiser is also an Editor-in-Chief of IEEE Signal Processing Society, an e-letter student activity chair in IEEE German Signal Processing Chapter, student branch counselor in IEEE Student Branch Duisburg and IEEE Senior member. André Bourdoux received the M.S. degree in Electrical Engineering (specialisation in micro-electronics) in 1982 from the Université Catholique de Louvain-la-Neuve, Belgium. His current interests span the areas of wireless communications theory, signal processing and transceiver architectures with a special emphasis on broadband and multi-antenna systems. He is the author and co-author of several conference and journal papers and of 2 patents applications in the field of SDMA and MIMO transmission. He is senior researcher at the Wireless Group of IMEC’s division of Design Technology for Integrated Information and Communication Systems (DESICS). Holger Boche is a Professor at the Heinrich-Hertz-Chair for Mobile Communications at Berlin University of Technology. He wrote about several issues in journal papers. Dr. Boche attended lots of conferences such as FIR Linear Relay Network with Frequency Selective Channels, and Optimal sequences for asynchronous CDMA channels with different SIR requirements. Javier Rodriuez Fonollosa received the telecommunication engineering degree from the Universitat Politècnica de Catalunya, Barcelona, Spain, in 1988, and the Ph.D. degree in electrical and computer engineering at Northeastern University, Boston, MA, in 1992. He is the author of 15 journals and more than 70 conference papers in the area of Signal Processing and Communications. He was elected IEEE Senior Member and member of the Signal Processing for Communications (SPCOM) Technical Committee of the IEEE Signal Processing Society in February 1998 and January 1999 respectively. His research interests include many different aspects of statistical signal processing for communications. Jorgen Bach Andersen is a Professor Emeritus, Doctor of Technology Department of Electronic Systems, Aalborg University. He was Professor at Aalborg University from 1974 to 2003. Professor Bach Andersen holds several prestigious assignments and memberships in national and international scientific societies and paved the way for the development of systems for wireless communications. Professor Andersen can be said to be one of the founding fathers of the mobile communications sector in Northern Jutland. Wolfgang Utschick received the Dipl.-Ing. and Dr.-Ing. degrees (both with honors) in electrical engineering from the Munich University of Technology (TUM), in 1993 and 1998, respectively. From 1998 – 2002 he was head of the Signal Processing Group at the Institute of Circuit Theory and Signal Processing at the TUM. Since October 2002 Wolfgang Utschick is Professor for Signal Processing at the Munich University of Technology in the Department of Electrical Engineering and Information Technology. He authored and co-authored many papers on the field of neural networks and signal processing w.r.t. to communication applications and holds some patents on the field of wireless communications.