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Multi-user relaying systems for enhanced performance and secrecy

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TitleInfo
Title
Multi-user relaying systems for enhanced
performance and secrecy
Name (type = personal)
NamePart (type = family)
Liu
NamePart (type = given)
Yupeng
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Yupeng Liu
Role
RoleTerm (authority = RULIB)
author
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NamePart (type = family)
Petropulu
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Athina
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Athina Petropulu
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Advisory Committee
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chair
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Bajwa
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Waheed
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Waheed Bajwa
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Advisory Committee
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internal member
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Spasojevic
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Predrag
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Predrag Spasojevic
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Advisory Committee
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internal member
Name (type = personal)
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Trappe
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Wade
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Wade Trappe
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Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Li
NamePart (type = given)
Hongbin
DisplayForm
Hongbin Li
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
outside member
Name (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
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NamePart
Graduate School - New Brunswick
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school
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Text
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theses
OriginInfo
DateCreated (qualifier = exact)
2012
DateOther (qualifier = exact); (type = degree)
2012-10
Place
PlaceTerm (type = code)
xx
Language
LanguageTerm (authority = ISO639-2b); (type = code)
eng
Abstract (type = abstract)
High data rate, reliability and secrecy are fundamental pursuits in wireless communications systems. A multi-user wireless environment is particularly challenging because of interference and potential information wiretap. This dissertation proposes to utilize relay techniques to achieve high data rate, high reliability and absolute secrecy in multi-user wireless communications systems. First, a communication system with multiple source-destination pairs needing to communicate simultaneously is investigated. A relay beamforming scheme is proposed, in which a multi-antenna relay assists the communication. The proposed scheme enjoys spatial multiplexing gain and has a significant data rate advantage over widely studied orthogonal transmission schemes, e.g., Time Division Multiple Access (TDMA) and Code Division Multiple Access (CDMA). The relay beamforming scheme also overcomes the difficulties of recently introduced interference alignment approaches by not requiring full cross-node Channel State Information (CSI). Beamforming schemes that maximize the system throughput and meet user Quality of Service (QoS) requirements are investigated, and both optimal and low-complexity suboptimal schemes are proposed. The system performance in terms of sumrate is analyzed and the rate limit is derived. The impact of imperfect CSI is analyzed and various approaches are proposed for mitigating the imperfect CSI effects in a practical system. Relay antenna selection is proposed to use in conjunction with the relay beamforming for more reliable communications. Second, physical layer secrecy in a two-slot communications system with one source, one destination, one eavesdropper and multiple relays is investigated. The goal is to achieve high secrecy rate without leaking any information to the eavesdropper. Different from the widely studied approaches in which the destination combines the listened signals in the first and second slots, we propose that the destination acts as a jammer in the first slot. This novel design effectively reduces the signal quality at the eavesdropper, and allows the secrecy rate to improve with higher power budget. Under this framework, a cooperative relaying scheme is proposed that targets at maximizing the secrecy rate. A set of novel approaches are proposed to realize this goal, namely, relay selection and optimal power allocation among the first/second slot data and jamming signals. Analysis of the scaling law of secrecy rate is conducted showing the secrecy rate trend at large transmit power and number of relays.
Subject (authority = RUETD)
Topic
Electrical and Computer Engineering
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_4273
PhysicalDescription
Form (authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
xii, 119 p. : ill.
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references
Note (type = statement of responsibility)
by Yupeng Liu
Subject (authority = ETD-LCSH)
Topic
Wireless communication systems--Security measures
Subject (authority = ETD-LCSH)
Topic
Multiuser detection (Telecommunication)--Security measures
Identifier (type = hdl)
http://hdl.rutgers.edu/1782.1/rucore10001600001.ETD.000066898
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TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
Identifier (type = local)
rucore19991600001
Location
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NjNbRU
Identifier (type = doi)
doi:10.7282/T30K27B3
Genre (authority = ExL-Esploro)
ETD doctoral
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Rights

RightsDeclaration (ID = rulibRdec0006)
The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
Liu
GivenName
Yupeng
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2012-09-24 22:29:54
AssociatedEntity
Name
Yupeng Liu
Role
Copyright holder
Affiliation
Rutgers University. Graduate School - New Brunswick
AssociatedObject
Type
License
Name
Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
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