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CHANNEL STATE INFORMATION FEEDBACK,
PREDICTION AND SCHEDULING FOR THE
DOWNLINK OF MIMO-OFDM WIRELESS SYSTEMS
by
Hooman Shirani-Mehr
A Dissertation Presented to the
FACULTY OF THE USC GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Ful¯llment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(ELECTRICAL ENGINEERING)
May 2010
Copyright 2010 Hooman Shirani-Mehr
Object Description
| Title | Channel state information feedback, prediction and scheduling for the downlink of MIMO-OFDM wireless systems |
| Author | Shirani-Mehr, Hooman |
| Author email | shiranim@usc.edu; hooman.shiranimehr@gmail.com |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Electrical Engineering |
| School | Viterbi School of Engineering |
| Date defended/completed | 2009-11-25 |
| Date submitted | 2010 |
| Restricted until | Unrestricted |
| Date published | 2010-04-30 |
| Advisor (committee chair) | Caire, Giuseppe |
| Advisor (committee member) |
Molisch, Andreas Neely, Michael Kuo, C.-C. (Jay) Baxendale, Peter |
| Abstract | Multiple input multiple output (MIMO) communication systems and multiuser diversity play important rolls in future wireless systems and enable them to achieve high data rates. Earlier studies on multi-user MIMO (MU-MIMO) systems were based on some ideal assumptions on system such as perfect channel state knowledge, perfect feedback channel and known inter-cell interference. This thesis investigates design and performance of MU-MIMO systems under more practical assumptions.; We first consider channel state information (CSI) feedback schemes for MIMO-OFDM broadcast channel. By considering simple zero-forcing beamforming (ZFBF) precoder and ignoring user selection problem, we compare achievable ergodic rates under different channel state feedback schemes. We propose a novel ''time-domain'' channel quantized feedback which is inspired by rate-distortion theory of Gaussian correlated sources and takes advantage of the channel frequency correlation structure.; Next, we consider spacial channel model (SCM) which is used as a benchmark in standardization and examine some alternatives for channel estimation and prediction scheme. We show that a parametric method based on ESPRIT is able to accurately predict the channel even for relatively high user mobility as long as the angular spread is large.; Subsequently, we study the problem of user scheduling in MIMO broadcast systems under non-perfect CSI. We propose a dynamic novel opportunistic scheme that, depending on the channel state quality of user terminals, categorizes user terminals into ''predictable'' and ''non-predictable'' users and at each scheduling slot, serves one non-predictable user (transmit diversity) or several predictable users (multi-user diversity).; In our final analysis, we investigate user scheduling in the presence of unknown inter-cell interference. We present a systematic method for joint scheduler/ARQ design. We define ''optimistic'' throughput as the throughput that can be achieved if the transmitter knew the instantaneous user ICI and transmitted to each scheduled user at the maximum possible instantaneous rate and show that properly designed incremental-redundancy hybrid ARQ schemes can achieve any desired fraction of the ''optimistic'' throughputs with finite average decoding delay where optimistic. |
| Keyword | channel state information; feedback; hybrid ARQ; MIMO; scheduling; wireless |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m2976 |
| Rights | Shirani-Mehr, Hooman |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | http://www.usc.edu/isd/libraries/services/ask_a_librarian/email/ |
| Filename | etd-ShiraniMehr-3520 |
| Archival file | uscthesesreloadpub_Volume40/etd-ShiraniMehr-3520.pdf |
Description
| Title | Page 1 |
| Full text | CHANNEL STATE INFORMATION FEEDBACK, PREDICTION AND SCHEDULING FOR THE DOWNLINK OF MIMO-OFDM WIRELESS SYSTEMS by Hooman Shirani-Mehr A Dissertation Presented to the FACULTY OF THE USC GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Ful¯llment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (ELECTRICAL ENGINEERING) May 2010 Copyright 2010 Hooman Shirani-Mehr |
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