He is currently a Full Professor of speech and signal processing at AAU. Before joining the Department of Electronic Systems, AAU, he was with the Telecommunications Laboratory of Telecom Denmark, Ltd, Copenhagen, Denmark; the Electronics Institute, Technical University of Denmark; the Scientific Computing Group of Danish Computing Center for Research and Education (UNI-C), Lyngby, Denmark; the Electrical Engineering Department (ESAT-SISTA), Katholieke Universiteit Leuven, Leuven, Belgium; and the Center for PersonKommunikation, AAU. His current research interest include statistical signal processing, numerical algorithms, optimization engineering, machine learning, and digital processing of acoustic, audio, communication, image, multimedia, speech, and video signals. He is the coauthor of the textbook Software-Defined GPS and Galileo Receiver—A Single-Frequency Approach (Birkhäuser, 2016, also translated to Chinese: National Defence Industry Press, China). He has been an Associate Editor of the IEEE Transactions on Signal Processing, the IEEE/ACM Transactions on Audio, Speech and Language Processing, the Signal Processing (Elsevier), and the EURASIP Journal on Advances in Signal Processing. He received an individual European Community Marie Curie (HCM: Human Capital and Mobility) Fellowship. He was the former Chairman of the IEEE Denmark Section and the IEEE Denmark Section's Signal Processing Chapter (Founder and first Chairman). He is a member of the Danish Academy of Technical Sciences and was a member of the Danish Council for Independent Research (2011–2016) appointed by two different Danish Ministers of Science.