He has been an adjunct professor at the INI, Carnegie Mellon University. He is currently leading a research team at the Institute of Telecommunications, Aveiro. His current research interests are centered on advanced communication systems and he has more than 300 published papers on the subject. He has served as Technical and General Chair of several conferences (currently he is the General Co-Chair of ISCC'2014), amongst other volunteer positions, and is Associate Editor of several journals. He is a member of ACM and a senior member of IEEE, and sits regularly on the Program Committees of many conferences in the field including ICC, Globecom, PIMRC, WCNC, FGCN, Networking, etc.