Christian Mehlführer

Dipl.-Ing. Dr. techn.
City, State: Vienna, Austria
Time Span: January 17, 2005 - December 31, 2010


Christian Mehlführer was born in Vienna, Austria, in 1979.

In 2004 he received his Dipl.-Ing. degree in electrical engineering from the Vienna University of Technology. Besides his diploma studies he worked part time at Siemens AG where he performed integration tests of GSM carrier units. After finishing his diploma thesis on implementation and real-time testing of space-time block codes at the Institute of Communications and Radio-Frequency Engineering, Vienna University of Technology, for which he received the Vodafone Förderpreis 2006 (together with Sebastian Caban), he started his doctoral thesis at the same institute.

In 2009, he finished his PhD about measurement-based performance evaluation of WiMAX and HSDPA with summa cum laude. His research interests include experimental investigation of MIMO systems, UMTS HSDPA, WLAN (802.11), WiMAX (802.16), and the upcoming 3GPP LTE system.


C10: Wireless Evolution Beyond 3G

In this project, transceiver concepts for systems beyond the third generation are studied on the link-level as well as on the system-level. In particular, we aim at computationally efficient receivers for the UMTS-HSDPA sub-system based on CDMA includingmultiple-antenna links.
A special focus is set on OFDM-transceivers that are discussed under the acronym “long-term evolution” in the standardization of UMTS. The system-level research aims at developing simulation methodologies for MIMO and designing radio-resource management strategies in heterogoneous wireless networks.

MIMO algorithms for rapid prototyping

Physical layer design-issues, such as MIMO (i.e. with several antennas for the transmit and receive path) decoding algorithms and channel models are investigated. The aim is to work out new technological ideas or improve existing ones with an emphasis on upcoming WLAN standards. The work focuses on the rapid translation of algorithmic ideas onto existing HW-platforms. As HW-platform we use the Smartsim channel emulator of the Austrian Research Centers Seibersdorf (ARCS). Currently, a compiled version of an IEEE 802.16-2004 compliant WIMAX simulator is available for free download.

Long Term Evolution (LTE) for UMTS

In this project we are currently developing a Matlab Simulator for LTE. This simulator will allow us to investigate physical layer design issues. Additionally, using the Vienna MIMO testbed, we will be able to do LTE measurements and investigate RF issues like antenna distance and different antenna configurations.