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Hf Communications
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Book Synopsis HF Communications Systems and Technology by : John M. Goodman
Download or read book HF Communications Systems and Technology written by John M. Goodman and published by Springer. This book was released on 1992-05-28 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: Communications engineers, ionospheric scientists, engineers and scientists in DoD HF projects, and DoD managers will use this source to gain a working understanding of the basic theory involved in HF radiowave propagation and uses of HF technology today.
Book Synopsis Third-generation and Wideband HF Radio Communications by : Eric E. Johnson
Download or read book Third-generation and Wideband HF Radio Communications written by Eric E. Johnson and published by Artech House. This book was released on 2013 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wideband HF. Book jacket.
Book Synopsis Advanced High-frequency Radio Communications by : Eric E. Johnson
Download or read book Advanced High-frequency Radio Communications written by Eric E. Johnson and published by Artech House Publishers. This book was released on 1997 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: This up-to-date, comprehensive reference and planner's guide presents an in-depth description of automated HF communications.
Book Synopsis HF Communications by : Nicholas M Maslin
Download or read book HF Communications written by Nicholas M Maslin and published by CRC Press. This book was released on 2017-06-30 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Communications using the high frequency spectrum (2-30 MHz) have experienced a considerable resurgence. In recent years, powerful microcomputers and VLSI technology have greatly enhanced the prospects of overcoming many of the unique problems that formerly afflicted the HF systems More...designer. The aim of this book, therefore, is to provide a fi
Book Synopsis Siting Criteria for HF Communication Centers by : William F. Utlaut
Download or read book Siting Criteria for HF Communication Centers written by William F. Utlaut and published by . This book was released on 1962 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: This note is intended to provide an engineering guide for the siting radio terminals for use in long-range HF communication systems. A brief summary of ionospheric effects upon HF radio signals is presented. Various factors required for an ideal site such as Fresnel zone size and smoothness, noise, antenna height, vertical radiation angle and electrical characteristics of the ground are discussed. Standards to guide compromises for practical cases of siting are considered. A partial bibliography which may be useful for those desiring a greater depth of understanding of the various subjects considered in provided.
Book Synopsis Digital Signal Processing in Communications Systems by : Marvin Frerking
Download or read book Digital Signal Processing in Communications Systems written by Marvin Frerking and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt: An engineer's introduction to concepts, algorithms, and advancements in Digital Signal Processing. This lucidly written resource makes extensive use of real-world examples as it covers all the important design and engineering references.
Book Synopsis Disaster Medicine by : Gregory R. Ciottone
Download or read book Disaster Medicine written by Gregory R. Ciottone and published by Elsevier Health Sciences. This book was released on 2006-01-01 with total page 986 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This new volume includes Individual Concepts and Events sections that provide information on the general approach to disaster medicine and practical information on specific disasters. You'll also find an exhaustive list of chapters on the conceivable chemical and biologic weapons known today, as well as strategies for the management of future events, or possible scenarios, for which there is no precedent."--BOOK JACKET.
Book Synopsis High Frequency Communication and Sensing by : Ahmet Tekin
Download or read book High Frequency Communication and Sensing written by Ahmet Tekin and published by CRC Press. This book was released on 2018-09-03 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: High Frequency Communication and Sensing: Traveling-Wave Techniques introduces novel traveling wave circuit techniques to boost the performance of high-speed circuits in standard low-cost production technologies, like complementary metal oxide semiconductor (CMOS). A valuable resource for experienced analog/radio frequency (RF) circuit designers as well as undergraduate-level microelectronics researchers, this book: Explains the basics of high-speed signaling, such as transmission lines, distributed signaling, impedance matching, and other common practical RF background material Promotes a dual-loop coupled traveling wave oscillator topology, the trigger mode distributed wave oscillator, as a high-frequency multiphase signal source Introduces a force-based starter mechanism for dual-loop, even-symmetry, multiphase traveling wave oscillators, presenting a single-loop version as a force mode distributed wave antenna (FMDWA) Describes higher-frequency, passive inductive, and quarter-wave-length-based pumped distributed wave oscillators (PDWOs) Examines phased-array transceiver architectures and front-end circuits in detail, along with distributed oscillator topologies Devotes a chapter to THz sensing, illustrating a unique method of traveling wave frequency multiplication and power combining Discusses various data converter topologies, such as digital-to-analog converters (DACs), analog-to-digital converters (ADCs), and GHz-bandwidth sigma-delta modulators Covers critical circuits including phase rotators and interpolators, phase shifters, phase-locked loops (PLLs), delay-locked loops (DLLs), and more It is a significantly challenging task to generate and distribute high-speed clocks. Multiphase low-speed clocks with sharp transition are proposed to be a better option to accommodate the desired timing resolution. High Frequency Communication and Sensing: Traveling-Wave Techniques provides new horizons in the quest for greater speed and performance.
Book Synopsis Seventh International Conference on HF Radio Systems and Techniques, 7-10 July 1997 by :
Download or read book Seventh International Conference on HF Radio Systems and Techniques, 7-10 July 1997 written by and published by . This book was released on 1997 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of the Ionosphere on Space Systems and Communications by : John M. Goodman
Download or read book Effect of the Ionosphere on Space Systems and Communications written by John M. Goodman and published by . This book was released on 1975 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modern HF Signal Detection and Direction Finding by : Jay R. Sklar
Download or read book Modern HF Signal Detection and Direction Finding written by Jay R. Sklar and published by MIT Press. This book was released on 2018-09-25 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: Detailed descriptions of detection, direction-finding, and signal-estimation methods, using consistent formalisms and notation, emphasizing HF antenna array sensing applications. Adaptive antenna array technology encompasses many powerful interference suppression approaches that exploit spatial differences among signals reaching a radio receiver system. Today, worldwide propagation phenomenology occurring in the High Frequency (HF) radio regime has made such interference common. In this book, Jay Sklar, a longtime researcher at MIT Lincoln Laboratory, presents detailed descriptions of detection, direction-finding, and signal-estimation methods applicable at HF, using consistent formalisms and notation. Modern electronic system technology has made many of these techniques affordable and practical; the goal of the book is to offer practicing engineers a comprehensive and self-contained reference that will encourage more widespread application of these approaches. The book is based on the author's thirty years of managing MIT Lincoln Laboratory work on the application of adaptive antenna array technologies to the sensing of HF communication signals. After an overview of HF propagation phenomenology, communication signal formats, and HF receiver architectural approaches, Sklar describes the HF propagation environment in more detail; introduces important modulation approaches and signaling protocols used at HF; discusses HF receiver system architectural features; and addresses signal processor architecture and its implementation. He then presents the technical foundation for the book: the vector model for a signal received at an adaptive array antenna. He follows this with discussions of actual signal processing techniques for detection and direction finding, including specific direction-finding algorithms; geolocation techniques; and signal estimation.
Book Synopsis Software Radio Architecture by : Joseph Mitola, III
Download or read book Software Radio Architecture written by Joseph Mitola, III and published by John Wiley & Sons. This book was released on 2004-04-07 with total page 565 pages. Available in PDF, EPUB and Kindle. Book excerpt: In einem sogenannten Software-Radio werden die Modulations-Wellenformen nicht durch herkömmliche elektronische Schaltungen, sondern durch eine Software erzeugt. Die so generierten digitalen Signale werden durch einen Breitband-D/A-Wandler in das gewünschte analoge modulierte Signal überführt. Grundlagen und Anwendungen der Technologie erläutert der Autor dieses Bandes, gestützt auf jahrelange Erfahrungen als Seminarleiter. (11/00)
Download or read book Army MARS at 90 written by William Sexton and published by Lulu.com. This book was released on 2016-09-09 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: There's an obscure agency in the Defense Department with the unique distinction of costing the taxpayers nothing for its national security role. The members wear no uniforms, don't carry weapons and work from home. They are specially-licensed amateur radio operators who serve part-time in the Army and Air Force Military Auxiliary Radio Systems, known by the acronym MARS. They're the heroes of MARS at 90, a small (96-pages), illustrated non-fiction work. In the nine decades covered, the volunteer members pitched in to assist the military in hurricanes and other natural calamities, and most memorably during the wars in Korea, Vietnam and Iraq. Their new mission is keeping the country connected in case the internet and other communications are severed by hostile or natural action. It's the only survivable backup the U.S. has.
Download or read book Federal Register written by and published by . This book was released on 1978-11-22 with total page 1646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Long Distance Propagation of Hf Radio Waves by : Alexander V. Gurevich
Download or read book Long Distance Propagation of Hf Radio Waves written by Alexander V. Gurevich and published by . This book was released on 2014-08-15 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Third International Conference on HF Communication Systems and Techniques by : Institution of Electrical Engineers. Electronics Division
Download or read book Third International Conference on HF Communication Systems and Techniques written by Institution of Electrical Engineers. Electronics Division and published by . This book was released on 1985 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Survey of Rural Information Infrastructure Technologies by :
Download or read book Survey of Rural Information Infrastructure Technologies written by and published by . This book was released on 1995 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Communication and information technologies can reduce the barriers of distance and space that disadvantage rural areas. This report defines a set of distinct voice, computer, and video telecommunication services; describes several rural information applications that make use of these services; and surveys various wireline and wireless systems and technologies that are being used or that might be used to deliver these services to rural areas. Rural information applications such as distance learning require a wide range of telecommunication services, but no current system or technology is capable of delivering all services to all areas. This report concludes that there are many technologies suitable for providing voice telecommunication services in rural areas. It is also technically feasible to provide advanced computer networking and video capabilities to even relatively small towns in rural areas. However, no available technology could economically provide these broadband capabilities to the most isolated farms, ranches, and homes. New wireless technology would be needed to accomplish this. Government regulations and policies will also play an essential role in the development of the Rural Information Infrastructure. Different regulations and policies will likely be required in rural areas than in urban areas. Contains 66 references. Appendices list acronyms and abbreviations and describe measurements of rural spectrum usage in the 108-MHz to 19.7-GHz frequency range, conducted at Eureka, California. (Author/SV).
