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Telemetry Systems Design.

Telemetry systems are a special set of communication systems designed to allow evaluation of data collected at a remote point. To understand these systems is primarily to understand the various modulation methods and characteristics used to transfer data, and how they are designed and implemented. This book is an introductory text for new engineers and a compilation of design procedures for the more seasoned engineer that covers telemetry system concepts and various modulation schemes.

The text begins with a definition of telemetry systems and a system overview. Explanations are given of the various analog modulation formats used and the required bandwidths. A discussion of frequency modulation (FM) system design follows in Chapter 3, explaining how a preemphasis schedule is designed to assure that signal quality meets the specifications in the presence of all operating conditions. The next two chapters deal with pulse code modulation (PCM) and time division multiplexing (TDM) systems. This section gives a comprehensive description of TDM-PCM/FM telemetry systems and discusses binary sequencing and analog-to-digital conversion. Chapter 6 explains binary phase shift keying (BPSK) or PCM/phase modulation. Bit error rates also are discussed and a comparison is presented between BPSK and PCM/FM. Chapter 7 explains the importance of synchronization to the various multiplexing schemes and presents a demultiplexing overview. The combination of analog and digital frequency modulation, referred to as a hybrid system, is discussed in Chapter 8. The final chapter describes convolutional coding for forward error correction.

The text emphasizes efficient spectrum utilization, an absolutely essential parameter for today's system designs. The book will be particularly useful for understanding the details and design procedures for the various forms of modulation, the signal bandwidths required, and the advantages and disadvantages of each.

COPYRIGHT 1995 Horizon House Publications, Inc.
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 1995 Gale, Cengage Learning. All rights reserved.

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Publication:Microwave Journal
Article Type:Book Review
Date:Sep 1, 1995
Words:287
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