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Author: ARMY TEST AND EVALUATION COMMAND ABERDEEN PROVING GROUND MD. Publisher: ISBN: Category : Languages : en Pages : 36
Book Description
Procedures are described for determining the technical performance characteristics of multiplexing equipments employing time-division multiplexing (TDM) with pulse-code-modulation (PCM) principles and techniques.
Author: ARMY TEST AND EVALUATION COMMAND ABERDEEN PROVING GROUND MD. Publisher: ISBN: Category : Languages : en Pages : 36
Book Description
Procedures are described for determining the technical performance characteristics of multiplexing equipments employing time-division multiplexing (TDM) with pulse-code-modulation (PCM) principles and techniques.
Author: Gilbert Held Publisher: ISBN: Category : Computers Languages : en Pages : 208
Book Description
Details the operational characteristics of these data communications devices, how to use them effectively and the available features which can be used to assist in the acquisition process. Covers the four fundamental types of multiplexers focusing on the statistical and T1 variety. Provides readers with insight into an understanding of when and when not to use multiplexers.
Author: Gilbert Held Publisher: ISBN: Category : Computers Languages : en Pages : 188
Book Description
Written by well known consultant Gilbert Held, it provides readers with an understanding of digital transmission technology and how this technology will provide the data transportation highway of the future. Attention is focused on digital networking to include the advantages and disadvantages associated with digital signaling, the operation and utilization of communications carrier offerings, the frame formats of high speed North American and European T-carriers, the features and operational utilization of T-carrier multiplexers, and the methods by which digital facilities can be tested. Each topic is covered in a hierarchical manner with chapters building upon the material presented previously. Includes review questions at the end of chapters.
Author: Bernard J. Keigher Publisher: ISBN: Category : Languages : en Pages : 110
Book Description
A test program was undertaken to determine the performance of tactical PCM systems with respect to word intelligibility as a function of various system configurations, and to determine the characteristics which limit such performance. This report covers the detailed procedures and results of Phase II of this program. The Fairbanks Rhyme Test was employed to determine the word intelligibility of numerous laboratory and field-deployed PCM systems, using 2-wire and 4-wire audio interconnections, and varying the losses in the audio terminations. Electrical measurements of selected parameters were made on the systems tested to permit correlation of the percent word intelligibility with readily measured parameters. The results indicate that 4-wire systems provide better performance than 2-wire systems of equivalent length. The limitations of 2-wire PCM systems are due to the inherent losses in the audio interconnections. However, there is no practical limit on the length of 4-wire tactical systems, since the 4-wire systems are essentially loss-free. Also, the results disclose that PCM system performance can be readily predicted knowing the system configuration with audio interconnection losses, or knowing the overall system loss and the measured signal-to-quantized noise ratio of the system. (Author).
Author: Louis J. Ippolito, Jr. Publisher: John Wiley & Sons ISBN: 111925938X Category : Technology & Engineering Languages : en Pages : 464
Book Description
The first edition of Satellite Communications Systems Engineering (Wiley 2008) was written for those concerned with the design and performance of satellite communications systems employed in fixed point to point, broadcasting, mobile, radio navigation, data relay, computer communications, and related satellite based applications. This welcome Second Edition continues the basic premise and enhances the publication with the latest updated information and new technologies developed since the publication of the first edition. The book is based on graduate level satellite communications course material and has served as the primary text for electrical engineering Masters and Doctoral level courses in satellite communications and related areas. Introductory to advanced engineering level students in electrical, communications and wireless network courses, and electrical engineers, communications engineers, systems engineers, and wireless network engineers looking for a refresher will find this essential text invaluable.
Author: Bill Waggener Publisher: Springer Science & Business Media ISBN: 9780442014360 Category : Technology & Engineering Languages : en Pages : 388
Book Description
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.
Author: Louis J. Ippolito Publisher: John Wiley & Sons ISBN: Category : Science Languages : en Pages : 406
Book Description
"This book presents and analyzes all atmospheric effects of importance for today's satellite systems, and discusses the tools needed for designing the links and evaluating system performance. - It serves as an excellent reference for communications engineers, wireless network and system engineers, system designers and graduate students in satellite communications and related fields."--Jacket.
Author: ARMY TEST AND EVALUATION COMMAND ABERDEEN PROVING GROUND MD.
Author: ARMY TEST AND EVALUATION COMMAND ABERDEEN PROVING GROUND MD.
Author: Gilbert Held
Author: Gilbert Held
Author: David Raphael
Author: Bernard J. Keigher
Author: United States. Department of Defense
Author: Louis J. Ippolito, Jr.
Author: United States. Dept. of Defense
Author: Bill Waggener
Author: Louis J. Ippolito