Amplitude And Phase Demodulation Of Filtered Am Pm Signals
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Amplitude and Phase Demodulation of Filtered AM/PM Signals by Edward Bedrosian,Rand Corporation Pdf
This Note reports on part of an investigation of strategic communications. It presents an analysis of the distortion experienced by a hybrid AM/PM signal that has been filtered in the amplification stages of a typical receiver and then demodulated.
Phase-lock Demodulation of a PM Signal Contaminated with Incidental AM by George B. Robinson Pdf
Signals from phase-modulated satellite transmitters usually exhibit some degree of incidental amplitude modulation. The effects of incidental AM are analyzed when this type of signal is demodulated by a phase-lock receiver which does not employ a limiter preceding the loop phase detector. The presence of incidental AM causes a reduction in the receiver output signal-to-noise ratio. The tolerable level of AM decreases in proportion to the phase modulation index Beta. For a square-wave modulating signal, a 1 db reduction results at the receiver PM channel output when Beta = 1 radian and the percentage of AM = 23, Beta = 1.2 radians and the percentage of AM = 16, or Beta = 1.5 radians and the percentage of AM = 4. Although only the PM channel of the receiver is used ordinarily, utilizing both the AM and PM channel by summing offers an improvement in S/N relative to the S/N ratio of the PM channel if the percentage of incidental AM is greater than fifteen.
During the ten years since the appearance of the groundbreaking, bestselling first edition of The Electronics Handbook, the field has grown and changed tremendously. With a focus on fundamental theory and practical applications, the first edition guided novice and veteran engineers along the cutting edge in the design, production, installation, operation, and maintenance of electronic devices and systems. Completely updated and expanded to reflect recent advances, this second edition continues the tradition. The Electronics Handbook, Second Edition provides a comprehensive reference to the key concepts, models, and equations necessary to analyze, design, and predict the behavior of complex electrical devices, circuits, instruments, and systems. With 23 sections that encompass the entire electronics field, from classical devices and circuits to emerging technologies and applications, The Electronics Handbook, Second Edition not only covers the engineering aspects, but also includes sections on reliability, safety, and engineering management. The book features an individual table of contents at the beginning of each chapter, which enables engineers from industry, government, and academia to navigate easily to the vital information they need. This is truly the most comprehensive, easy-to-use reference on electronics available.
Communications Technology Handbook by Geoff Lewis Pdf
This is the first point of reference for the communications industries. It offers an introduction to a wide range of topics and concepts encountered in the field of communications technology. Whether you are looking for a simple explanation, or need to go into a subject in more depth, the Communications Technology Handbook provides all the information you need in one single volume. This second edition has been updated to include the latest technology including: Video on Demand Wire-less Distribution systems High speed data transmission over telephone lines Smart cards and batteries Global positioning Systems The contents are ordered initially by communications systems. This is followed by an introduction to each topic and goes on to provide more detailed information in alphabetical order. Every section contains an explanation of common terminology, and further references are provided. This approach offers flexible access to information for a variety of readers. Those who know little about communications professionals, the book constitutes a handy reference source and a way of finding out about related technologies. The book addresses an international audience by referring to all systems and standards throughout. This book has been revised to include new sections on: * Video on demand * Wire-less distribution systems * High speed data transmission over telephone lines * Smart cards * Global positioning systems * provides a basic understanding of a wide range of topics * offers a flexible approach for beginners and specialists alike * addresses an international audience by referring to all systems and standards throughout
Wireless Local Loop (WLL) is now widely recognized as an economically viable technology for provision of telecommunication services to subscribers in sparsely populated as well as highly congested areas. However, the preparation of the business case, choice of a suitable technology, deployment planning, and radio and network system design for a WLL system depend on a range of technical and strategic planning variables. The scope of the book includes a systems-level coverage of the following topics: Introduction to WLL systems Fundamentals of Radio Systems Key cellular and cordless technologies WLL systems design - system components and interfaces WLL systems design - radio aspects Planning and deployment of WLL systems Examples of commercially available WLL systems Broadband applications and services
Scientific and Technical Aerospace Reports by Anonim Pdf
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Synchrotron Radiation Sources — A Primer by Herman Winick Pdf
Specialists in the technical components of a synchrotron light source are usually well versed in their field and in the associated technical literature. However, with the rapid and continuing growth of synchrotron radiation research, and with new facilities coming online and being authorized for design and construction around the world, there is a need for a reference book that describes the various technical components of a synchrotron light source in a manner that will be useful to those who lack specialized technical background, but who have responsibility for some part of the design, construction, operation or development of such a facility. This would include technicians, engineers and physicists who have technical background in related fields but no specific experience with a synchrotron light source, and also project managers, laboratory directors, and government officials involved with synchrotron light facilities. College level scientific or engineering training or the equivalent experience is assumed and appropriate mathematics is used throughout. However, the basic concepts in each chapter are given in less technical language and a glossary of terms as well as an index will make the book useful for those with less technical training or experience. Contents: Introduction and Overview (H Winick)Lattices (M Cornacchia)Injector Systems (G Mülhaupt)RF Systems (D J Thompson & D M Dykes)Magnet Design (N Marks)Magnet Power Supplies (R Richter)Magnetic Measurements (R P Walker)Vacuum Systems (J Noonan & D Walters)Accelerator Controls and Modeling (J Corbett & C Wermelskirchen)Beam Diagnostics (P Kuske)Magnet Support and Alignment (R E Ruland)Beam Instabilities (M Furman, J Byrd & S Chattopadhyay)Orbit Stabilizing and Multibunch Feedback Systems (J N Galayda, L-J Chung & R O Hettel)Wiggler and Undulator Insertion Devices (R D Schlueter)Conventional Facilities (V Saile & J D Scott)Safety (T Dickinson) Readership: Scientists and engineers. Keywords:Accelerators;Synchrotron Radiation;Storage Rings;Synchrotrons;Magnets;Rf Systems;Vacuum Systems;Control Systems;Insertion Devices;Wigglers;Undulators;Power SuppliesReviews:“Herman Winick is to be commended for organizing and editing a comprehensive selection of articles (chapters) written by leading specialists and covering all aspects of synchrotron radiation production in this excellent new book … Its swift publication makes it fully up-to-date at the time of going to press … It is extremely beneficial in allowing SR specialists from specific areas to learn about related areas. The level has been carefully monitored by the editor and is useful in providing a sound basis for further study in each area.”Gwyn Williams Synchrotron Radiation News
Telecommunication Electronics by Dante Del Corso,Vittorio Camarchia,Roberto Quaglia,Paolo Bardella Pdf
This practical, hands-on resource describes functional units and circuits of telecommunication systems. The functions characterizing these systems, including RF amplifiers (both low noise and power amplifiers), signal sources, mixers and phase lock loops, are explored from an operational level viewpoint. And as all functions are migrating to digital implementations, this book describes functional units and circuits of telecommunication systems (with radio, wire, or optical links), from functional level viewpoint to the circuit details and examples. The structure of a radio transceiver is described and a view of all functional units, including migration to SDR (Software Defined Radio) is provided. Chapters include a functional identification of the units described and analysis of possible circuit solutions and analysis of error sources. The sequence reflects the actual design procedure: functional identification, search and analysis of solutions, and critical review to provide an understanding of the various solutions and tradeoffs, with guidelines for design and/or selection of proper functional units.
Standard Handbook of Electronic Engineering, 5th Edition by Donald Christiansen,Charles Alexander,Ronald K. Jurgen Pdf
The Standard Handbook of Electronics Engineering has defined its field for over thirty years. Spun off in the 1960’s from Fink’s Standard Handbook of Electrical Engineering, the Christiansen book has seen its markets grow rapidly, as electronic engineering and microelectronics became the growth engine of digital computing. The EE market has now undergone another seismic shift—away from computing and into communications and media. The Handbook will retain much of its evergreen basic material, but the key applications sections will now focus upon communications, networked media, and medicine—the eventual destination of the majority of graduating EEs these days.