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Soft Cyclic Delay Diversity and its Performance for DVB-T in Ricean Channels

Dammann, Armin and Raulefs, Ronald and Plass, Simon (2007) Soft Cyclic Delay Diversity and its Performance for DVB-T in Ricean Channels. In: Proceedings of IEEE Global Telecommunications Conference (GLOBECOM 2007). IEEE Global Telecommunications Conference (GLOBECOM 2007), 2007-11-26 - 2007-11-30, Washington, DC (USA). ISBN 1-4244-1043-6. ISSN 1930-529X

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Cyclic delay diversity (CDD) provides additional diversity in Rayleigh fading channels, and therefore, improves the system performance. For line-of-sight (LOS) propagation, e.g., the additive white Gaussian noise channel, the implementation of CDD yields to a performance loss. The power distribution among the transmit (TX) antenna branches is a further parameter which can freely be chosen for optimizing the system performance and allows to switch on/off CDD softly. The idea is to feed different power levels into the multiple TX antenna branches rather than distributing the TX power uniformly among the TX antennas. We exemplarily implement the soft CDD principle to the terrestrial digital video broadcasting system (DVB-T). We consider a Ricean multipath fading channel, which allows to control the ratio of LOS and non-LOS propagation power via the Ricean factor for simulations. Simulation results for 2-TX and 4-TX antenna CDD show that antenna power weighting significantly reduces the SNR loss in LOS propagation by the cost of a slight degradation of the SNR gain in non-LOS scenarios.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Soft Cyclic Delay Diversity and its Performance for DVB-T in Ricean Channels
AuthorsInstitution or Email of Authors
Raulefs, RonaldUNSPECIFIED
Date:23 March 2007
Journal or Publication Title:Proceedings of IEEE Global Telecommunications Conference (GLOBECOM 2007)
Refereed publication:Yes
In ISI Web of Science:No
Keywords:Antenna Diversity, Cyclic Delay Diversity, Soft Cyclic Delay Diversity, DVB-T, Line-of-Sight Propagation, Ricean Channel
Event Title:IEEE Global Telecommunications Conference (GLOBECOM 2007)
Event Location:Washington, DC (USA)
Event Type:international Conference
Event Dates:2007-11-26 - 2007-11-30
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W KN - Kommunikation/Navigation
DLR - Research area:Space
DLR - Program:W KN - Kommunikation/Navigation
DLR - Research theme (Project):W - Vorhaben GNSS2/Neue Dienste und Produkte (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation
Institute of Communication and Navigation > Communications Systems
Deposited By: Dr.-Ing. Armin Dammann
Deposited On:21 Jan 2008
Last Modified:12 Dec 2013 20:25

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