The Foundations of the Digital Wireless World


Book Description

Professor Andrew J Viterbi has been extremely influential in the communications field via his invention of the Viterbi Algorithm, and his championing of CDMA technology developed by his company Qualcomm Inc. This book presents a selection of papers personally selected by him to mark his key technical contributions and his thoughts on CDMA technology as it evolved. Sample Chapter(s). Chapter 1: The Foundations of the Digital Wireless World (3,852 KB). Contents: Phase-Locked Loop Dynamics in the Presence of Noise by Fokker-Planck Techniques; Nonlinear Estimation of PSK-Modulated Carrier Phase with Application to Burst Digital Transmission; Error Bounds for Convolutional Codes and an Asymptotically Optimum Decoding Algorithm; Orthogonal Tree Codes for Communication in the Presence of White Gaussian Noise; Convolutional Codes and Their Performance in Communication Systems; Trellis Encoding of Memoryless Discrete-Time Sources with a Fidelity Criterion; A Pragmatic Approach to Trellis-Coded Modulation; A Personal History of the Viterbi Algorithm; Spread Spectrum Communications: Myths and Realities; Spread Spectrum and Satellites: A Symbiosis; Very Low Rate Convolutional Codes for Maximum Theoretical Performance of Spread-Spectrum Multiple-Access Channels; Four Laws of Nature and Society: The Governing Principles of Digital Wireless Communication Networks; Erlang Capacity of a Power Controlled CDMA System; Performance of Power-Controlled Wideband Terrestrial Digital Communication; CDMA/HDR: A Bandwidth-Efficient High-Speed Wireless Data Service for Nomadic Users; Shannon Capacity Limits of Wireless Networks. Readership: Professors, undergraduate and graduate students in engineering. Professionals in the telecommunications and computer science industry.







Coded Modulation Systems


Book Description

Coded Modulation Systems is an introduction to the subject of coded modulation in digital communication. It is designed for classroom use and for anyone wanting to learn the ideas behind this modern kind of coding. Coded modulation is signal encoding that takes into account the nature of the channel over which it is used. Traditional error correcting codes work with bits and add redundant bits in order to correct transmission errors. In coded modulation, continuous time signals and their phases and amplitudes play the major role. The coding can be seen as a patterning of these quantities. The object is still to correct errors, but more fundamentally, it is to conserve signal energy and bandwidth at a given error performance. The book divides coded modulation into three major parts. Trellis coded modulation (TCM) schemes encode the points of QAM constellations; lattice coding and set-partition techniques play major roles here. Continuous-phase modulation (CPM) codes encode the signal phase, and create constant envelope RF signals. The partial-response signaling (PRS) field includes intersymbol interference problems, signals generated by real convolution, and signals created by lowpass filtering. In addition to these topics, the book covers coding techniques of several kinds for fading channels, spread spectrum and repeat-request systems. The history of the subject is fully traced back to the formative work of Shannon in 1949. Full explanation of the basics and complete homework problems make the book ideal for self-study or classroom use.







Principles of Spread-Spectrum Communication Systems


Book Description

This textbook provides a concise but lucid explanation of the fundamentals of spread-spectrum systems with an emphasis on theoretical principles. The choice of specific topics is tempered by the author’s judgment of their practical significance and interest to both researchers and system designers. Throughout the book, learning is facilitated by many new or streamlined derivations of the classical theory. Problems at the end of each chapter are intended to assist readers in consolidating their knowledge and to provide practice in analytical techniques. This third edition includes new coverage of topics such as CDMA networks, Acquisition and Synchronization in DS-CDMA Cellular Networks, Hopsets for FH-CDMA Ad Hoc Networks, and Implications of Information Theory, as well as updated and revised material on Central Limit Theorem, Power Spectral Density of FH/CPM Complex Envelopes, and Anticipative Adaptive-Array Algorithm for Frequency-Hopping Systems.