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SPP 1163:  Techniques, Algorithms and Concepts for Future COFDM Systems (TakeOFDM)

Subject Area Computer Science, Systems and Electrical Engineering
Term from 2004 to 2010
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 5472046
 
The goal of this Priority Programme is the consideration of telecommunication systems on the basis of COFDM (Coded Orthogonal Division Multiplexing). Joint layer approaches and algorithms related to the COFDM transmission technique are designed and their combining is analysed in detail. In the framework of the research program, especially protocols, multiple access schemes and link adaptation techniques on the data link layer are considered and newly designed, where always a joint and harmonised approach with the COFDM-based physical layer is followed. Due to its nature, the program necessarily uses an interdisciplinary concept. Scientists and experts from the field of high frequency technology, communications engineering, protocol architecture, coding theory and network security should work closely together. Especially joint research projects are therefore encouraged.
For wired as well as for wireless transmission, the possibility of an optimal adaptation to the channel exists, according to information theory. This facilitates a high spectral efficiency. Moreover, the minimisation or reduction of transmit power, while maintaining data rate and transmission quality, is one of the goals in the system design process. This topic also has a significance regarding biological effects of electromagnetic waves. Against this background, a low transmit power within the cellular network is a general objective in future networks. Some examples of research areas are listed below:
-- multiple antenna systems, based on the COFDM transmission technique for increasing the data rate
-- protocol architecture in broadband COFDM systems
-- joint optimisation of the physical and the data link control (DLC) layer in COFDM-based systems
-- flexible multiple access techniques and self-organised resource allocation for COFDM systems also in cellular networks
-- new concepts of channel coding, synchronisation and equalisation for COFDM-based systems
These fields of research promise increasing the performance of future communication systems.
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