Department of Electronic Media: System Theory and Technology


During the last couple of years we have placed the emphasis of the research activities on the co-existence of (wireless) broadcast and broadband networks. In addition, we continue work related to the more classical broadcast systems. A number of work items in this field relate to the activities of the International DVB Project. Prof. Reimers chaired the DVB Technical Module (TM) for 20 years - until June 2012.  Being a member of ATSC, IfN is also deeply involved in the development of the next generation broadcast system for the US (ATSC 3.0).

In order to enable the co-existence of broadcast and broadband, we invented three new systems. The first one is "Dynamic Broadcast". Dynamic Broadcast allocates frequency spectrum dynamically to either wireless broadband or to terrestrial broadcast networks. The second system is called "Tower Overlay over LTE-A+ (TOoL+)". Here we combine signals targeting a TV receiver and signals targeting Smartphones and Tablet PCs in a single transmission channel. The third invention (Redundancy on Demand - RoD) extends the coverage area of terrestrial broadcast networks through the use of a broadband network. If the signal quality provided by the broadcast network is insufficient (like for instance in deep indoor environments), the broadband network is used to deliver supporting data (redundancy) in order for the broadcast receiver to display perfect image and sound.

One of our researchers concentrates on something completely different. His research is dedicated to supporting households and enterprises during Germany´s departure from nuclear and fossil-fuel energy by means of communication technology.