ERA

Download the full-sized PDF of Performance evaluation, optimal power allocation, and physical layer designs for wireless relaying systemsDownload the full-sized PDF

Analytics

Share

Permanent link (DOI): https://doi.org/10.7939/R3BP8W

Download

Export to: EndNote  |  Zotero  |  Mendeley

Communities

This file is in the following communities:

Graduate Studies and Research, Faculty of

Collections

This file is in the following collections:

Theses and Dissertations

Performance evaluation, optimal power allocation, and physical layer designs for wireless relaying systems Open Access

Descriptions

Other title
Subject/Keyword
Wireless communication systems -- Energy consumption
Wireless communication systems -- Design
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Farhadi, Golnaz
Supervisor and department
Beaulieu, Norman C. (Electrical and Computer Engineering)
Examining committee member and department
Aazhang, Behnaam (Electrical and Computer Engineering, Rice University)
Elmallah, Ehab S. (Computing Science)
Ardakani, Masoud (Electrical and Computer Engineering)
Vorobyov, Sergiy (Electrical and Computer Engineering)
Jiang, Hai (Electrical and Computer Engineering)
Beaulieu, Norman C. (Electrical and Computer Engineering)
Department
Department of Electrical and Computer Engineering
Specialization

Date accepted
2009-08-26T17:42:34Z
Graduation date
2009-11
Degree
Doctor of Philosophy
Degree level
Doctoral
Abstract
Cooperative communication is a promising way to improve wireless network performance by exploiting spatial diversity in fading channels in a distributed manner. Performance of various wireless cooperative configurations are investigated. Theoretical expressions for outage and error probabilities in general fading of amplify-and-forward multi-hop systems are derived using the characteristic function or moment generating function of the inverse of the instantaneous received signal-to-noise ratio. In addition, ergodic capacity of different multi-hop systems is evaluated assuming the channel state information is only available at the receiving terminals. It is shown that decode-and-froward multi-hop systems achieve higher ergodic capacities than amplify-and-forward multi-hop systems. Furthermore, theoretical expressions in the form of single finite integrals for the capacity of different source-adaptive amplify-and-forward multi-hop systems are obtained. New optimal power allocation schemes that maximize the instantaneous received signal-to-noise ratio in an amplify-and-forward multi-hop transmission system are also obtained for short-term and long-term power constraints. The optimal power allocation strategy under short-term power constraint requires a centralized implementation, whereas the optimal power solutions to the long-term power constraints can be implemented in a decentralized manner. Outage probabilities of the proposed power-optimized systems are derived and the performance gains of the optimal power allocation schemes are examined. Previous studies have been primarily focused on cooperative systems in which the functionality of the receivers relies on availability of channel information. Low complexity receivers for coherent amplify-and-forward multi-relay systems requiring no instantaneous fading amplitude information are proposed. Analytical expressions for evaluation of the average output signal-to-noise ratio and symbol error probability are derived and it is demonstrated that these schemes achieve full diversity. Furthermore, upper and lower bounds on the ergodic capacity are obtained. In addition, a maximum energy selection scheme in a noncoherent amplify-and-forward multi-relay system is investigated. An expression for the symbol error probability of this system is derived. It is shown that this scheme achieves full diversity whereas it requires neither instantaneous nor statistical channel gain information at the destination. Finally, performance of different multi-hop diversity transmission systems are studied and expressions for evaluation of their outages and bit error probabilities are derived in Rayleigh fading.
Language
English
DOI
doi:10.7939/R3BP8W
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
Citation for previous publication

File Details

Date Uploaded
Date Modified
2014-05-01T03:39:42.856+00:00
Audit Status
Audits have not yet been run on this file.
Characterization
File format: pdf (Portable Document Format)
Mime type: application/pdf
File size: 1329482
Last modified: 2015:10:12 13:29:00-06:00
Filename: Farhadi_Golnaz_Fall 2009.pdf
Original checksum: 7b7b36e10e03ee22c772caf8d236d339
Well formed: true
Valid: true
Status message: Too many fonts to report; some fonts omitted. Total fonts = 1264
Page count: 169
Activity of users you follow
User Activity Date