Habilitation Theses:

G. Matz:
"Time-Varying Linear Systems in Wireless Communications";
Technische Universität Wien / Fakultät für Elektrotechnik und Informationstechnik, 2004.

English abstract:
This habilitation thesis is a collection of several articles that deal with the
application of time-varying linear systems in wireless communications. These
articles are preceded by an introduction, where we discuss the role of
communications engineering in nowadays information society, describe recent
research trends in wireless communications, consider the application of
time-varying systems in communications engineering, and provide an overview
of related work. The topics of the individual articles in the subsequent
chapters are within the following main areas:

Analysis/Synthesis of Time-Varying Systems. We first provide a mathematically
coherent framework for a time-frequency transfer function calculus of time-varying
systems. Based on that, we cover some aspects of the (statistical) characterization of
random time-varying channels satisfying the common assumption of wide-sense stationary
uncorrelated scattering (WSSUS). Then, we discuss an efficient and flexible WSSUS channel
simulation scheme and introduce a novel framework for the statistical description of
non-WSSUS channels.

Measurement and Estimation of Channel Properties. Channel measurements and suitable
evaluation and estimation procedures are indispensable for any communication system
design. We present a quantitative assessment of the systematic errors of correlative
sounding techniques used to measure the impulse response or transfer function of
time-varying channels. In addition, efficient training-based and data-driven algorithms
for the reliable estimation of WSSUS channel statistics are introduced.

Design of Wireless Communication Schemes. We also discuss some design aspects for
wireless multicarrier communication schemes. Our focus is on the estimation and prediction
of time-varying channels in a multicarrier context (both training-based and
decision-directed). We finally introduce a new modulation format that allows to
increase the robustness of multicarrier transmissions against time and frequency
dispersion introduced in wireless links.

Created from the Publication Database of the Vienna University of Technology.