Download or read book Prediction of Multipath Fading on Terrestrial Microwave Links at Frequencies of 11 GHz and Greater written by D. D. Crombie and published by . This book was released on 1984 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published data on the probability of multipath fading on different paths with lengths up to 45 km, at frequencies up to 37 GHz, measured in different countries, have been analyzed. For the paths which have probabilities greater than approx 1/1000% for 20 dB fades, it is found that the fading probability increases with antenna beam width. In addition, it is found that increasing the clearance of the path above surrounding terrain reduces the fading probability. Inclusion of these two variables, in addition to frequency and path length, reduces the uncertainty in prediction of fading probability by a factor of 80. (Author).

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1984 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Publications Abstracts written by United States. National Telecommunications and Information Administration and published by . This book was released on 1984 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the International Symposium on Antennas and Propagation Japan written by and published by . This book was released on 1985 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Investigation of Terrain Related Variables for Predicting the Multipath Fade Depth Distribution on Terrestrial Microwave Links written by Terje Tjelta and published by . This book was released on 1987 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Terrain related variables are shown to be important in an asymptotic prediction equation for the worst-month multipath fade depth distribution. From a fading data base for 47 links in North Western Europe, equations are developed employing up to six variables and an additional variable geoclimatic factor. The best standard error of prediction is 2.8 dB, considerably better than that available from other prediction methods for the same region. A large number of variables are investigated, most of them closely related to the terrain. The results suggest that terrain reflections play an important role in multipath propagation.

Download or read book Recommendations and Reports of the CCIR 1986 Propagation in non ionized media written by International Radio Consultative Committee and published by . This book was released on 1986 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characteristics of the Lower Atmosphere Influencing Radio Wave Propagation written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development and published by . This book was released on 1984 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assembl e Pl ni re written by International Radio Consultative Committee and published by . This book was released on 1990 with total page 794 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Review of the Role of Surface Reflection in Multipath Propagation Over Terrestrial Microwave Links written by Roberic L. Olsen and published by . This book was released on 1987 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: It has long been recognized that surface reflection on overwater microwave radio relay paths plays an important role in causing frequency selective multipath fading. However, there has been a tendency among many radio scientists and engineers to assume that similar but less prevalent fading on most overland paths arose mainly from multiple paths through the atmosphere. With the introduction of wide-band digital radio into microwave relay networks, the origin of selective fading has been investigated with renewed interest because of the damaging effects of distortion. There is mounting experimental and theoretical evidence that ground reflection and scattering has an important role in producing much of the selective multipath propagation effects on overland links. This paper reviews both old and new evidence, providing some new insights into the complex mixture of mechanisms involved. Some resulting implications for the design of digital radio links are also discussed.

Download or read book Digital Microwave Communication written by George Kizer and published by John Wiley & Sons. This book was released on 2013-06-24 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book to cover all engineering aspects of microwave communication path design for the digital age Fixed point-to-point microwave systems provide moderate-capacity digital transmission between well-defined locations. Most popular in situations where fiber optics or satellite communication is impractical, it is commonly used for cellular or PCS site interconnectivity where digital connectivity is needed but not economically available from other sources, and in private networks where reliability is most important. Until now, no book has adequately treated all engineering aspects of microwave communications in the digital age. This important new work provides readers with the depth of knowledge necessary for all the system engineering details associated with fixed point-to-point microwave radio path design: the why, what, and how of microwave transmission; design objectives; engineering methodologies; and design philosophy (in the bid, design, and acceptance phase of the project). Written in an easily accessible format, Digital Microwave Communication features an appendix of specialized engineering details and formulas, and offers up chapter coverage of: A Brief History of Microwave Radio Microwave Radio Overview System Components Hypothetical Reference Circuits Multipath Fading Rain Fading Reflections and Obstructions Network Reliability Calculations Regulation of Microwave Radio Networks Radio Network Performance Objectives Designing and Operating Microwave Systems Antennas Radio Diversity Ducting and Obstruction Fading Digital Receiver Interference Path Performance Calculations Digital Microwave Communication: Engineering Point-to-Point Microwave Systems will be of great interest to engineers and managers who specify, design, or evaluate fixed point-to-point microwave systems associated with communications systems and equipment manufacturers, independent and university research organizations, government agencies, telecommunications services, and other users.

Download or read book Advisory Group for Aerospace Research and Development Index of Publications written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development and published by . This book was released on 1987 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Diagnosis of the Causes of Multipath Fading on Terrestrial Microwave Communications Systems written by A. R. Webster and published by . This book was released on 1986 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In a previous contract (24ST.36001-4-0856), a prototype 12-element wide-aperture array, together with associated transmitting and receiving equipment, was developed and deployed in the field on a 30 km. path from the Ontario Hydro tower at Uniondale to the Centre for Radio Science. Operating in a CW mode at 16.65 GHz, the system was designed to resolve the received signal into its separate components under multipath propagation conditions. As a result of the encouraging results which emerged from that work, it was proposed under this contract that further developments be undertaken with a view to improving the performance and, longer term, investigating the problems associated with specific communications links in collaboration with the industry"--Introduction, page 1.

Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1520 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Diagnosis of the Causes of Multipath Fading on Terrestrial Microwave Communications Systems written by Alan Ralph Webster and published by . This book was released on 1986 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Conference Record written by and published by . This book was released on 1998 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1990-08 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electronics Engineer s Reference Book written by F. F. Mazda and published by Butterworth-Heinemann. This book was released on 2013-10-22 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electronics Engineer's Reference Book, Sixth Edition is a five-part book that begins with a synopsis of mathematical and electrical techniques used in the analysis of electronic systems. Part II covers physical phenomena, such as electricity, light, and radiation, often met with in electronic systems. Part III contains chapters on basic electronic components and materials, the building blocks of any electronic design. Part IV highlights electronic circuit design and instrumentation. The last part shows the application areas of electronics such as radar and computers.