Multiuser Communications With Relaying and User Cooperation
Liang, Yingbin
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https://hdl.handle.net/2142/80931
Description
Title
Multiuser Communications With Relaying and User Cooperation
Author(s)
Liang, Yingbin
Issue Date
2005
Doctoral Committee Chair(s)
Veeravalli, Venugopal V.
Department of Study
Electrical Engineering
Discipline
Electrical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Electronics and Electrical
Language
eng
Abstract
In the remainder of the dissertation, the impact of relaying and user cooperation on downlink of wireless networks is investigated. Three two-user relay broadcast channels are studied from an information-theoretic viewpoint. These channels represent fundamental units of downlink systems that exploit relaying and user cooperation. Achievable regions for these channels are derived. Upper bounds on the capacity regions are also derived and are shown to be tighter than the standard cut-set bounds. Furthermore, capacity regions are established for some special classes of channels. The results illustrate that relaying and user cooperation are powerful techniques in improving the capacity of broadcast channels.
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