Design Of A Pulse Code Modulation System

Pulse Code Modulation Techniques brings together the theory and practice of PCM at the physical layer, where the "bits meet the silicon", so to speak. The key topics of symbol encoding, detection and synchronization are discussed, in detail, both from a theoretical and a practical standpoint. Topics which have been largely absent in text books, such as multiplexing, formatting and format synchronization, are also considered. Although PCM evolved as a communication technology, it has become an important technology in data recording. In a sense, magnetic or optical media are just specialized communication media and the key technologies discussed in this book are just as important to recording applications as to communications. PCM codes used for magnetic recording applications are discussed along with traditional communication codes. The design, analysis and implementation of a PCM system requires knowledge of very specific techniques associated with detection, synchronization and coding. The techniques have evolved from both ad hoc methods and complex theory. One of the goals of this book is to bridge the gap between theory and practice in the key techniques. Matched filters are not only discussed theoretically, but means for implementing them are also considered. The same is true with symbol synchronization.

Read this book cover to cover to strengthen your overall knowledge of Pulse Code Modulation (PCM) systems design, or use it as a time-saving desktop reference to answer specific design questions. Authored by a well-known expert in the field, this book identifies and describes the various types of PCM systems in use today, shows you how PCM is utilized in a wide variety of applications, and provides you with the technical knowledge you need to engineer, design, and analyze a PCM system.

Telemetering systems and applications have moved far beyond the space flight telemetry most people have heard of to cutting-edge uses across a broad range of disciplines, including industry, medicine, and meteorology. To fully understand and participate in the acquisition of data this technology makes possible, scientists in these fields along with engineers new to telemetering require some background in the concepts, hardware, and software that makes the technology so valuable. Introduction to PCM Telemetering Systems, Second Edition summarizes the techniques and terminology used in sending data and control information between users and the instruments that collect and process the data. It gives an overall systems introduction to the relevant topics in three primary areas: system interfaces; data transport, timing, and synchronization; and data transmission techniques. The topics addressed include sensor characteristics, user interface design, data filtering, data framing, statistical analysis, telemetry standards, time code standards, modulation techniques, and radio propagation. To reinforce understanding, each chapter includes exercises. Rather than focusing on design specifics, which can change so rapidly with evolving technologies, the author centers his discussions on concepts and standards. This edition incorporates the latest standards, LabVIEW-based examples of telemetry and command processing, and simulations using multiSim and Commsim.

A study and development program is described involving the application of certain techniques for long range transmission of PCM telemetry data. The objective of the program was to explore and develop those areas of CM system design which most satisfactorily meet long range transmission and data handling requirements. The technical approach includes optimization of system information capacity, selection of an optimum R.F. link, and investigations of format compromises, to a tain the maximum information rate possible over a wi e range of transmission path lengths, and a variety of da a requirements. The type of modulation (phase) for the R.F. link is shown by theoretical analysis to be superior to any other. A system desi n and engineering model development program has been completed. Results of test performed on the model verify the feasibility of the engineering design. (Author).