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Performance of Cyclic Delay Diversity in Ricean Channels

Dammann, Armin and Raulefs, Ronald and Plass, Simon (2007) Performance of Cyclic Delay Diversity in Ricean Channels. In: Multi-Carrier Spread-Spectrum 2007, 1, pp. 217-226. Springer. 6th Workshop on Multicarrier Spread Spectrum, 2007-05-07 - 2007-05-09, Herrsching, Germany. ISBN 978-1-4020-6128-8.

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Abstract

Cyclic delay diversity (CDD) provides additional diversity in Rayleigh fading channels, and therefore, improves 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. Therefore, we investigate CDD for Ricean channels with different Ricean factors. To combat the SNR loss for significant LOS propagation we propose the principle of antenna power weighting. The idea is to feed different power levels into the multiple transmit (TX) antenna branches rather than distributing the TX power uniformly among the TX-antennas. We exemplarily implement CDD with antenna power weighting to the terrestrial digital video broadcasting system (DVB-T). Simulation results 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)
Title:Performance of Cyclic Delay Diversity in Ricean Channels
Authors:
AuthorsInstitution or Email of Authors
Dammann, ArminUNSPECIFIED
Raulefs, RonaldUNSPECIFIED
Plass, SimonUNSPECIFIED
Date:7 May 2007
Journal or Publication Title:Multi-Carrier Spread-Spectrum 2007
Refereed publication:Yes
In ISI Web of Science:No
Volume:1
Page Range:pp. 217-226
Publisher:Springer
Series Name:Lecture Notes in Electrical Engineering
ISBN:978-1-4020-6128-8
Status:Published
Keywords:cyclic delay diversity, CDD, soft cyclic delay diversity, Ricean channel, DVB-T
Event Title:6th Workshop on Multicarrier Spread Spectrum
Event Location:Herrsching, Germany
Event Type:international Conference
Event Dates:2007-05-07 - 2007-05-09
Organizer:Deutsches Zentrum für Luft- und Raumfahrt e.V.
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:09 Jul 2007
Last Modified:27 Apr 2009 13:39

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