PREFACE
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PASSBAND COMMUNICATION OVER TIME INVARIANT CHANNELS
Chapter 3 briefly reviews the fundamentals of passband transmission over a time in-
variant channel. In Chapter 4 the optimum maximum-likelihood receiver is rigor-
ously derived. We differ from the usual treatment of the subject by deriving a fully
digital receiver structure, comprising digital matched filter, interpolator, variable
rate decimator, and carrier phase rotator. While the optimal receiver is clearly non-
realizable, it forms the basis for suitable approximations leading to practical receiv-
er structures, the key issue being the principle of synchronized detection. In Chapter
5 estimation theory is used to systematically derive algorithms for timing and carri-
er phase synchronization. Chapter 6 is concerned with performance analysis of syn-
chronizers. We derive lower bounds on the variance of synchronization parameter
estimates. These bounds serve as a benchmark for practical synchronizers. The
tracking performance of carrier and symbol synchronizers is analyzed in Section
6.3. Nonlinear phenomena, such as acquisition and cycle slips, are discussed in
Section 6.4. Chapter 7 derives the bit error rate performance degradation as func-
tion of the carrier phase and timing error variance for practically important modula-
tion formats. Chapter 8 is concerned with the derivation of digital algorithms for
frequency estimation and the performance analysis of these algorithms. Chapter 9
discusses timing recovery by interpolation and controlled decimation. Chapter 10 is
devoted to implementation. We address the design methodology and CAD tools. A
recently completed DVB (Digital Video Broadcasting) ASIC chip design serves as
a case study to illustrate the close interaction between algorithm and architecture
design.
COMMUNICATION OVER FADING CHANNELS
Chapter 11 gives an introduction to fading channels. Starting with time-continuous
and discrete-equivalent flat and selective fading channel models, the statistical char-
acterization of fading channels as well as techniques of modeling and simulation of
discrete-equivalent fading channels are discussed. Chapter 12 is concerned with the
fundamentals of detection and parameter synchronization on fading channels.
Based on mathematical transmission models, optimal estimation-detection receiver
structures for joint detection and synchronization are derived. Chapter 13 presents
realizable receiver structures for synchronized detection on flat and selective fading
channels. The concept of outer and inner receivers is reviewed, with emphasis on the
role of diversity. Inner receiver structures, particularly suited for serial or TDMA-
like channel access, are discussed for both flat and selective fading channels, detail-
ing on decision metric computation and preprocessing of the received signal. A
brief extension to CDMA systems concludes the chapter. Parameter synchroniza-
tion for flat fading channels is the topic of Chapter 14. Algorithms for non-data-aid-
ed (NDA), decision-directed (DD), and data-aided (DA) flat fading channel estima-
tion and their performance are discussed in detail. In Chapter 15 adaptive
algorithms for NDA/DD selective fading channel estimation, as well as methods of
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