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On the Influence of Cyclic Delay Diversity and Doppler Diversity on the Channel Characteristics in OFDM Systems

Dammann, Armin (2007) On the Influence of Cyclic Delay Diversity and Doppler Diversity on the Channel Characteristics in OFDM Systems. In: Proceedings IEEE International Conference on Communications (ICC 2007). IEEE International Conference on Communications, 2007-06-24 - 2007-06-28, Glasgow, Scotland.

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In this paper, we analyze the influence of the transmit antenna diversity techniques cyclic delay diversity (CDD) and discontinuous Doppler diversity (DDoD) on the channel observation at the receiver side for wireless communications systems based on orthogonal frequency division multiplexing (OFDM). These antenna diversity techniques influence the channel fading characteristic, and thus, are described as a modified channel. We analyze this modified channel in terms of its channel transfer function and fading correlation in time and frequency direction. We will see, that the fading correlation factorizes into an antenna related part and a propagation channel part. This is, the transmitter does not require any information about the channel itself in order to design roots in the correlation function. This analysis yields a guidance for the choice of the antenna configuration parameters, which is the goal of this paper. The proper choice of these parameters (cyclic delays, Doppler shifts) allows for reducing respectively removing fading correlation in time and/or frequency direction, and therefore, optimizing diversity

Item URL in elib:https://elib.dlr.de/47739/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:On the Influence of Cyclic Delay Diversity and Doppler Diversity on the Channel Characteristics in OFDM Systems
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:28 February 2007
Journal or Publication Title:Proceedings IEEE International Conference on Communications (ICC 2007)
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
EditorsEmailEditor's ORCID iDORCID Put Code
Keywords:Cyclic Delay Diversity, CDD, Discontinuous Doppler Diversity, OFDM, Correlation
Event Title:IEEE International Conference on Communications
Event Location:Glasgow, Scotland
Event Type:international Conference
Event Start Date:24 June 2007
Event End Date:28 June 2007
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: Dammann, Dr.-Ing. Armin
Deposited On:09 Jul 2007
Last Modified:24 Apr 2024 19:09

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