Darko, born on April 2, 1957 in Belgrade, Serbia, was not only pushing ahead the frontiers of research in our rapidly evolving branch of applied science, but also generously shared his knowledge with a new generation as an academic teacher Darko’s posthumous papers had to be presented by others. This clearly shows how rapidly Darko was snatched from the very middle of his life as a passionate researcher. By properly approximating complicated probability density functions he effectively fused measurements of time and frequency differences of arrival (TDoA/FDoA) for mobile intermittent emitter geolocation and tracking. Darko’s work laid a sound theoretical foundation for the development of practical state of the art algorithms in these applications.

Darko received his B.A. (1979) and M.S. (1985) degrees in Electrical Engineering from the University of Belgrad, Serbia. A university document calls him “the best student of his generation” and “the first student in the history of the Department to graduate one year before target date”. This exceptional young engineer proved his pioneering personality while taking the opportunity to immigrate to Australia when the “iron curtain” was lifted. There he received his Ph.D. degree in 1994 from the University of Newcastle. Darko was a Principal Research Fellow at the University of Melbourne, Australia, before he joined Hanyang University in 2010 as a full professor. Research and teaching were for him two sides of the same coin. He loved his students and his students loved him.

Darko’s research interest were in the very core of our community covering topics such as multiple target tracking, classification, nonlinear estimation, emitter geolocation, fusion in distributed wireless sensor networks, resource allocation, and applications for radar and sonar. He has authored many articles in archival journals such as the IEEE Transactions on Aerospace and Electronic Systems, Automatic Control, and Signal Processing, IET radar, sonar and navigation as well as Automatica. In 2011, he co-authored the well-established text book Fundamentals of Object Tracking, Cambridge University Press.

Being a member of the Board of Directors of International Society for Information Fusion ISIF since 2005, Darko has shaped the profile of our community, especially when he served us as an ISIF president in 2008, when our young society celebrated its 10th anniversary at FUSION 2008 in Cologne, Germany. Darko was a Christian. May all of us remember in our thoughts and prayers Darko, his wife Dragana, his daughter Korana, and his son Luka.