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Book Rain Fade Dynamics Analysis for Terrestrial Microwave Links Operating in Malaysia

Download or read book Rain Fade Dynamics Analysis for Terrestrial Microwave Links Operating in Malaysia written by Alhareth M. T. Zyoud and published by . This book was released on 2011 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rain fade refers to the absorption and scattering of a microwave signal by rain drops, which becomes a critical issue at frequencies above 10 GHz. Knowledge of the dynamics characteristics of rain fade is important for communication system designs since it determines the system availability and assigns the system resource. It is also very essential information for implementation of fade mitigation techniques. Limited research has been conducted on rain fade dynamics modeling and prediction. Those researches were conducted on rain fade dynamics data collected from the temperate regions not the tropical areas, where the rain intensity is very high. Prediction models which are available in literature and adopted by International Telecommunication Union - Radio (ITU-R) have been proposed for earth to satellite links only and not for terrestrial links. In this study 16 months measured rain attenuation data in Malaysia for six microwave links at four different frequencies (15, 23, 26 and 38 GHz) were analyzed. Two features of rain fade dynamics for terrestrial links were investigated: fade slope and fade duration, and compared to models proposed by ITU-R for those parameters. Significant discrepancies have been observed with prediction models and measured data. In the case of fade slope, ITU-R model did not fit the measured data for attenuation level higher than 4 dB. The number of events for measured data was higher than that predicted by ITU-R fade duration model, especially for short duration and for all attenuation levels. None of six link's measured fade slope and fade duration data fit with ITU-R prediction models. A new modified model for rain fade slope prediction has been proposed based on measured data. The proposed modified fade slope model fits the measured data at all four frequencies and for all attenuation levels.

Book Effective Path Length for Terrestrial Microwave Links

Download or read book Effective Path Length for Terrestrial Microwave Links written by Mohammad Karim and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Rain Attenuation Prediction for Terrestrial Microwave Links Based on Rain Rate and Rain Attenuation Measurements in a Tropical Region

Download or read book Rain Attenuation Prediction for Terrestrial Microwave Links Based on Rain Rate and Rain Attenuation Measurements in a Tropical Region written by Md. Rafiqul Islam and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Studies on the Effects of Signal Attenuation Due to Rain on Terrestrial Line of sight Microwave Communication Link Operating at 15 GHZ in Malaysia

Download or read book Studies on the Effects of Signal Attenuation Due to Rain on Terrestrial Line of sight Microwave Communication Link Operating at 15 GHZ in Malaysia written by Rozeha A. Rashid and published by . This book was released on 1993 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents an investigation of the rain induced attenuation at15GHz on terrestrial line-of sight link. The measurements were conductedby using an experimental link with path length of about 440 meters at Universiti Teknologi Malaysia (UTM), Kuala Lumpur. The aim is to carry outpropagation studies concerning the effects of meterrological phenomena,in particularly, precipitation on the transmission path. The transmission ismonitored automatically with a personel computer and simultaneously with a set of meteorological instruments; rain-gauge and distrometer. Measurements data of the rain-induced attenuation on the LOS Link will be compared with CCIR model for tropical regions and predicted model developed at UTM.The propagation results will be used to validate the prediction of the spceific attenuation obtained from CCIR and the prediction model developedat UTM.

Book Developing a Frequency Diversity Models for Rain Fade Mitigation in Malaysia

Download or read book Developing a Frequency Diversity Models for Rain Fade Mitigation in Malaysia written by Mohamad Laith Altajjar and published by . This book was released on 2015 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microwave communication systems in tropical region like Malaysia, operating at higher frequency ranges, are degraded in its performance severely during rains. Hence, the rain fade must be taken in consideration for the microwave link design to track the service outage and quality. This research aims to develop and propose frequency diversity prediction models for rain fade mitigation from 5 - 40 GHz. The rain attenuation are predicted based on ITU-R rain attenuation prediction method using measured rain rate in Malaysia. The predicted data are analysed to develop and propose a prediction for the frequency diversity gain and improvement factor. The estimated gains are not uniform along the frequency range of 5 - 40 GHz, hence gain model is proposed for different frequency separation (5, 10, 15, 20 GHz) at 0.001 to 1% outages. A general model is also proposed for any path length at 0.01% outage only. An alternative approach named as frequency diversity improvement is also proposed. However this model is limited to 1 Km path length only. Proposed gain models are validated by comparing the measured rain attenuation data at 15, 23, 26, 38 GHz frequencies in UTM, Skudai. The difference varies from -2 to 2 dB. The effects of the frequency separation, the outage percentage and the path length on the gain models are discussed. The effect of fade margin on the improvement factor is also investigated. This analysis will help the designer to understand how these models can identify the best diversity frequency to use under rain fade.

Book Prediction of Rain Attenuation on Satellite Communication in Malaysia

Download or read book Prediction of Rain Attenuation on Satellite Communication in Malaysia written by Fadillah Hassan Berseri and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Scientific and Technical Aerospace Reports

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1989 with total page 1134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Antennas and Propagation for Wireless Communication Systems

Download or read book Antennas and Propagation for Wireless Communication Systems written by Simon R. Saunders and published by John Wiley & Sons. This book was released on 2007-05-07 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: Antennas and propagation are of fundamental importance to the coverage, capacity and quality of all wireless communication systems. This book provides a solid grounding in antennas and propagation, covering terrestrial and satellite radio systems in both mobile and fixed contexts. Building on the highly successful first edition, this fully updated text features significant new material and brand new exercises and supplementary materials to support course tutors. A vital source of information for practising and aspiring wireless communication engineers as well as for students at postgraduate and senior undergraduate levels, this book provides a fundamental grounding in the principles of antennas and propagation without excessive recourse to mathematics. It also equips the reader with practical prediction techniques for the design and analysis of a very wide range of common wireless communication systems. Including: Overview of the fundamental electromagnetic principles underlying propagation and antennas. Basic concepts of antennas and their application to specific wireless systems. Propagation measurement, modelling and prediction for fixed links, macrocells, microcells, picocells and megacells Narrowband and wideband channel modelling and the effect of the channel on communication system performance. Methods that overcome and transform channel impairments to enhance performance using diversity, adaptive antennas and equalisers. Key second edition updates: New chapters on Antennas for Mobile Systems and Channel Measurements for Mobile Radio Systems. Coverage of new technologies, including MIMO antenna systems, Ultra Wideband (UWB) and the OFDM technology used in Wi-Fi and WiMax systems. Many new propagation models for macrocells, microcells and picocells. Fully revised and expanded end-of-chapter exercises. The Solutions Manual can be requested from www.wiley.com/go/saunders_antennas_2e

Book Satellite Communications Systems Engineering

Download or read book Satellite Communications Systems Engineering written by Louis J. Ippolito, Jr. and published by John Wiley & Sons. This book was released on 2017-02-28 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Book International Aerospace Abstracts

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1998 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Satellite Communication Applications Handbook

Download or read book The Satellite Communication Applications Handbook written by Bruce R. Elbert and published by Artech House. This book was released on 2004 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the publication of the best-selling first edition of The Satellite Communication Applications Handbook, the satellite communications industry has experienced explosive growth. Satellite radio, direct-to-home satellite television, satellite telephones, and satellite guidance for automobiles are now common and popular consumer products. Similarly, business, government, and defense organizations now rely on satellite communications for day-to-day operations. This second edition covers all the latest advances in satellite technology and applications including direct-to-home broadcasting, digital audio and video, and VSAT networks. Engineers get the latest technical insights into operations, architectures, and systems components.

Book Millimeter Wave Wireless Communications

Download or read book Millimeter Wave Wireless Communications written by Theodore S. Rappaport and published by Pearson Education. This book was released on 2015 with total page 705 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Definitive, Comprehensive Guide to Cutting-Edge Millimeter Wave Wireless Design “This is a great book on mmWave systems that covers many aspects of the technology targeted for beginners all the way to the advanced users. The authors are some of the most credible scholars I know of who are well respected by the industry. I highly recommend studying this book in detail.” —Ali Sadri, Ph.D., Sr. Director, Intel Corporation, MCG mmWave Standards and Advanced Technologies Millimeter wave (mmWave) is today's breakthrough frontier for emerging wireless mobile cellular networks, wireless local area networks, personal area networks, and vehicular communications. In the near future, mmWave products, systems, theories, and devices will come together to deliver mobile data rates thousands of times faster than today's existing cellular and WiFi networks. In Millimeter Wave Wireless Communications, four of the field's pioneers draw on their immense experience as researchers, entrepreneurs, inventors, and consultants, empowering engineers at all levels to succeed with mmWave. They deliver exceptionally clear and useful guidance for newcomers, as well as the first complete desk reference for design experts. The authors explain mmWave signal propagation, mmWave circuit design, antenna designs, communication theory, and current standards (including IEEE 802.15.3c, Wireless HD, and ECMA/WiMedia). They cover comprehensive mmWave wireless design issues, for 60 GHz and other mmWave bands, from channel to antenna to receiver, introducing emerging design techniques that will be invaluable for research engineers in both industry and academia. Topics include Fundamentals: communication theory, channel propagation, circuits, antennas, architectures, capabilities, and applications Digital communication: baseband signal/channel models, modulation, equalization, error control coding, multiple input multiple output (MIMO) principles, and hardware architectures Radio wave propagation characteristics: indoor and outdoor applications Antennas/antenna arrays, including on-chip and in-package antennas, fabrication, and packaging Analog circuit design: mmWave transistors, fabrication, and transceiver design approaches Baseband circuit design: multi–gigabit-per-second, high-fidelity DAC and ADC converters Physical layer: algorithmic choices, design considerations, and impairment solutions; and how to overcome clipping, quantization, and nonlinearity Higher-layer design: beam adaptation protocols, relaying, multimedia transmission, and multiband considerations 60 GHz standardization: IEEE 802.15.3c for WPAN, Wireless HD, ECMA-387, IEEE 802.11ad, Wireless Gigabit Alliance (WiGig)