Theory and Practice of Modem Design

It has been predicted that the arrival of the all-digital telephone network would soon make modems obsolete. Yet this has not happened, nor is it likely to for at least another ten years. Meanwhile, the ever-increasing demand for data-communications systems, of which analog-based modems are a large and essential part, continues to elicit new theories and exciting applications. This book examines these new theories and applications of modem design, and includes several practical examples of how to choose and design all the major components of a modem. Emphasizing an applied approach throughout, The Theory and Practice of Modem Design first describes the various media through which data must be transmitted-especially the most important one, the telephone network. Then, after a review of the basic theories of data transmission, the book discusses modulation methods, including the analysis of two new, controversial methods, with a fresh assessment of their usefulness and a description of how they can be implemented. Next, the book describes the overall architecture and all the major components of a receiver (with separate chapters for the critical functions of timing and carrier recovery, and linear and nonlinear adaptive equalization) using a careful blending of theory and specific practical examples, and considering both hardware and software implementations. The Theory and Practice of Modem Design also discusses two topics of great current interest to modem designers: convolutional coding for error correction and full-duplex operation (using both frequency division multiplexing and adaptive echo cancellation). There is also a section that explains all the ancillary functions that a practical modem must perform, plus two appendices that describe computer programs and diagnostic tests that can be used for designing and debugging. The Theory and Practice of Modem Design is the most-up-to-date working reference on the subject for a wide range of data communications professionals-from product planners and marketing personnel to design and research engineers. It is also an ideal text for a graduate engineering course that emphasizes an applied approach to data communications, and an excellent secondary text for a more conventional, theory-based course on digital communications.Bingham, John A. C. is the author of 'Theory and Practice of Modem Design', published 1988 under ISBN 9780471851080 and ISBN 0471851086.