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Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. PHY 431  Pulse shaping, localization and the approximate eigenstructure of LTV channels
 Institute of Electrical and Electronics Engineers IEEE: IEEE Wireless Communications and Networking Conference, WCNC 2008. Conference proceedings : 31 March  3. April 2007, Las Vegas, Nevada, USA Piscataway, NJ: IEEE, 2008 ISBN: 9781424419975 ISBN: 9781424419968 pp.11141119 
 Wireless Communications and Networking Conference (WCNC) <2008, Las Vegas/Nev.> 

 English 
 Conference Paper 
 Fraunhofer HHI () 
 ofdm modulation; pulse shaping; timevarying channels 
Abstract
In this article we show the relation between the theory of pulse shaping for WSSUS channels and the notion of approximate eigenstructure for timevarying channels. We consider pulse shaping for a general signaling scheme, called WeylHeisenberg signaling, which includes OFDM with cyclic prefix and OFDM/OQAM. The pulse design problem in the view of optimal WSSUSaveraged SINR is an interplay between localization and "orthogonality". The localization problem itself can be expressed in terms of eigenvalues of localization operators and is intimately connected to the concept of approximate eigenstructure of LTV channel operators. In fact, on the L(sub 2)level both are equivalent as we will show. The concept of "orthogonality" in turn can be related to notion of tight frames. The right balance between these two sides is still an open problem. However, several statements on achievable values of certain localization measures and fundamental limits on SINR can already be made as will be shown in the paper.