Download or read book Pulse Frequency Modulation written by R. W. Rochelle and published by . This book was released on 1962 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pulse frequency modulation Telemetry written by Robert W. Rochelle and published by . This book was released on 1964 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pulse-frequency modulation is an information encoding technique which has been used in a number of satellites and space probes. The word-error probability for PFM signals is found to be higher when contiguous unmatched filters are used in the detection process than when matched filters are used. The theory of group-coded binary sequences is derived by using a special type of correlation matrix. The experimental results obtained from the spectral analysis of satellite recordings perturbed with random noise are presented to illustrate the noise-immunity characteristic of pulse-frequency modulation.
Download or read book Pulse Width Modulation In Power Electronics written by Isaak D Mayergoyz and published by World Scientific. This book was released on 2021-05-05 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a theoretical discussion of pulse width modulation (PWM) in power electronic inverters. Pulse width modulation is widely used for the frequency control of speed of ac motors, the design of uninterruptible power supplies (UPS) as well as the integration of renewable energy sources into existing power grid systems. PWM technique is based on approximation of sinusoidal waveforms by sequences (trains) of rectangular pulses whose widths are properly modulated. This width-modulation results in the suppression of low order harmonics at the expense of amplification of high order harmonics which are suppressed by energy-storage elements in load circuits. The discussion covers various PWM techniques with a focus on the optimal time-domain PWM techniques proposed by the authors.
Download or read book Pulse Width Modulation for Power Converters written by D. Grahame Holmes and published by John Wiley & Sons. This book was released on 2003-10-03 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt: * The first single volume resource for researchers in the field who previously had to depend on separate papers and conference records to attain a working knowledge of the subject. * Brings together the field's diverse approaches into an integrated and comprehensive theory of PWM
Download or read book Advanced Pulse Width Modulation With Freedom to Optimize Power Electronics Converters written by Dong Jiang and published by Springer Nature. This book was released on 2021-01-20 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a technical publication for students, scholars and engineers in electrical engineering, focusing on the pulse-width-modulation (PWM) technologies in power electronics area. Based on an introduction of basic PWM principles this book analyzes three major challenges for PWM on system performance: power losses, voltage/current ripple and electromagnetic interference (EMI) noise, and the lack of utilization of control freedoms in conventional PWM technologies. Then, the model of PWM's impact on system performance is introduced, with the current ripple prediction method for voltage source converter as example. With the prediction model, two major advanced PWM methods are introduced: variable switching frequency PWM and phase-shift PWM, which can reduce the power losses and EMI for the system based on the prediction model. Furthermore, the advanced PWM can be applied in advanced topologies including multilevel converters and paralleled converters. With more control variables in the advanced topologies, performance of PWM can be further improved. Also, for the special problem for common-mode noise, this book introduces modified PWM method for reduction. Especially, the paralleled inverters with advanced PWM can achieve good performance for the common-mode noise reduction. Finally, the implementation of PWM technologies in hardware is introduced in the last part.
Download or read book Theoretical and Practical Resolution Limits for Processing Pulse Frequency Modulation Telemetry written by Thomas J. Karras and published by . This book was released on 1968 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Resolution of Frequency Measurements in PFM Telemetry written by Alan M. Demmerle and published by . This book was released on 1964 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pulse width Modulated DC DC Power Converters written by Marian K. Kazimierczuk and published by John Wiley & Sons. This book was released on 2014-03-31 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fully worked solutions with clear explanations The Pulse-width Modulated DC-DC Power Converters: Solutions Manual provides solutions to the practice problems in the text. Fully worked, each solution includes formulas and diagrams as necessary to help you understand the approach, and explanations clarify the reasoning behind the correct answer. The solutions are aligned chapter-by-chapter with the text, and provide useful guidance that can help you identify your level of comprehension. Designed to make your study time more productive, this solutions manual is an invaluable tool for anyone studying electricity and electrical engineering.
Download or read book Computer Science and Communications Dictionary written by Martin Weik and published by Springer Science & Business Media. This book was released on 2000-12-31 with total page 1948 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Computer Science and Communications Dictionary is the most comprehensive dictionary available covering both computer science and communications technology. A one-of-a-kind reference, this dictionary is unmatched in the breadth and scope of its coverage and is the primary reference for students and professionals in computer science and communications. The Dictionary features over 20,000 entries and is noted for its clear, precise, and accurate definitions. Users will be able to: Find up-to-the-minute coverage of the technology trends in computer science, communications, networking, supporting protocols, and the Internet; find the newest terminology, acronyms, and abbreviations available; and prepare precise, accurate, and clear technical documents and literature.
Download or read book Stability and Oscillations of Nonlinear Pulse Modulated Systems written by Arkadii Kh. Gelig and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are two main fields of application of pulse-modulated sys tems, communications and control. Communication is not a subject of our concern in this book. Controlling by a pulse-modulated feed attracted our efforts. The peculiarity of this book is that all back the sampled-data systems are considered in continuous time, so no discrete time schemes are presented. And finally, we pay a little at tention to pulse-amplitude modulation which was treated in a vast number of publications. The primary fields of our interest are pulse width, pulse-frequency, and pulse-phase modulated control systems. The study of such systems meets with substantial difficulties. An engineer, who embarks on theoretical investigations of a pulse-mo dulated control, is often embarrassed by the sophisticated mathe matical tools he needs to know. When a mathematician, who looks for practical applications of his mathematical machinery, meets with these systems, he faces a lot of of complicated technical schemes and terms. Probably this is the reason why publications on pulse modu lation are seldom in scientific journals. As for books on this subject (save on amplitude modulation), the significant part of them is in Russian and hardly available for a non-Russian reader.
Download or read book Telecommunication Principles written by J. J. O Reilly and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a first introduction to the subject of telecommunications suit able for first and second year undergraduates following degree or similar courses in electronic engineering. There are very few specific prerequisites other than a general background in electric circuit principles and a level of mathematical maturity consistent with entry to engineering courses in British universities. The intention is to provide a broad perspective of modern telecommunication principles and applications. Following a general overview of telecommunications, a thorough, albeit introductory, treatment is provided of underlying principles such as signal representation and analysis, sampling, analogue and digital trans of several mission, modulation and coding. The book concludes with a description important systems applications which serve as case studies to illustrate further the principles introduced and demonstrate their application in a practical context. Many people have contributed, directly and indirectly, to this book. I am espe cially grateful to Professor Kel Fidler of the Open University for suggesting that I write the book and for the support and guidance he has provided throughout the endeavour. The Telecommunications Research Group of the Department of Elec trical Engineering Science at the University of Essex has provided a stimulating environment in which to develop my appreciation of telecommunication systems and in particular Professor Ken Cattermole has influenced my thinking greatly.
Download or read book NASA Thesaurus written by and published by . This book was released on 1994 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Manual Control of a Pulse frequency Modulated Reaction Control written by John P. Hornseth and published by . This book was released on 1965 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: A manual pulse-frequency modulated reaction control is a control with fixed pulse width, fixed pulse amplitude, and manual control of pulse frequency. For such a control, it is possible to maintain a constant reactive force per pulse for various combinations of pulse widths and pulse amplitudes. The controlled element was a one-dimensional second order system. A semirandom sequence of three step voltages was used to displace a spot on a CRT. Subjects were required to recenter the spot as fast as possible. Manual control performance was tested under three levels (low, middle, high) of control output gain. Three pulse width-pulse amplitude combinations were tested at the low and high control output gain levels and four pulse width-pulse amplitude combinations for the middle control output gain level. Three subjects were tested under all conditions. Performance measures obtained were: integrated absolute error, integrated absolute fuel consumption, and integrated absolute stick motion. The results of this study indicate that (1) changing pulse width and pulse amplitude, but keeping control output gain fixed, does not affect manual performance; but that (2) changing control gain does. (Author).
Download or read book Digital Telephony and Network Integration written by Bernhard E. Keiser and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: What is "digital telephony"? To the authors, the term digital telephony de notes the technology used to provide a completely digital point-to-point voice communication system from end to end. This implies the use of digital technol ogy from one end instrument through the transmission facilities and switching centers to another end instrument. Digital telephony has become possible only because of the recent and ongoing surge of semiconductor developments allowing microminiaturization and high reliability along with reduced costs. This book deals with both the future and the present. Thus, the first chapter is entitled, "A Network in Transition." As baselines, Chapters 2, 3, and 10 provide the reader with the present status of telephone technology in terms of voice digitization as well as switching principles. The book is an outgrowth of the authors' continuing engineering education course, "Digital Telephony," which they have taught since January, 1980, to attendees from business, industry, government, common carriers, and tele phony equipment manufacturers. These attendees come from a wide variety of educational backgrounds. but generally have the equivalent of at least a bachelor's degree in electrical engineering. The book has been written to provide both the engineering student and the practicing engineer a working knowledge of the principles of present and future voice communication systems based upon the use of the public switched network. Problems or discussion questions have been included at the ends of the chapters to facilitate the book's use as a senior level or first year graduate level course text.
Download or read book Ciarcia s Circuit Cellar written by Steve Ciarcia and published by Circuit Cellar. This book was released on 1979 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses Uses for the Microcomputer, Including Projects & Methods for Interfacing the Personal Computer with Its Environment
Download or read book Air Force AFM written by and published by . This book was released on 1964 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Report written by and published by . This book was released on 1963 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
