Louis J. Ippolito

Radiowave Propagation in Satellite Communications (eBook, PDF)

• Format: PDF

Produktbeschreibung

Radiowave Propagation in Communications was written with two basic objec tives: (l) to present an up-to-date review of the major radiowave propagation phenomena which hinder reliable space communications, and (2) to describe how these propagation phenomena affect the design and performance of satellite communications systems. Earth-orbiting satellites are employed extensively for the relay of information in a vast array of telecommunications, meteorological, government, and sci entific applications. Satellite systems rely on the transmission of radiowaves to and from the satellite and are dependent on the propagation characteristics of the transmission path, primarily the earth's atmosphere. Radiowave propagation thus plays a very important part in the design and ultimate performance of space communications systems. This book presents, for the first time, the meshing in a single publication of the fundamentals of radiowave propagation factors with a discussion of the practical consequences of these factors on satellite communications systems. Two major subfie1ds are involved in this book. Radiowave propagation, which is basically applied electromagnetic theory, provides the theory and an alytical tools for the first several chapters. Later chapters then apply propagation effects to the field of electrical engineering involved with satellite communi cations. The material progresses from the essential aspects of radiowave prop agation to the application of practical methods and techniques in the design and performance of satellite communications systems.

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Produktdetails

• Verlag: Springer Netherlands
• Seitenzahl: 242
• Erscheinungstermin: 6. Dezember 2012
• Englisch
• ISBN-13: 9789401170277
• Artikelnr.: 44047469

Inhaltsangabe

1 Introduction.- 1.1 Purpose and Objectives.- 1.2 Developments and Trends in Space Communications.- 1.3 Frequency Allocations and Regulatory Aspects.- References.- 2 Fundamentals of Radiowave Propagation.- 2.1 Transmission Principles.- 2.2 Antenna Gain and Free Space Attenuation.- 2.3 Polarization.- 2.4 Radiowave Frequency and Space Communications.- 2.5 Radiowave Propagation Mechanisms.- 2.6 Major Radiowave Propagation Factors in Space Communications.- References.- 3 Attenuation by Atmospheric Gases.- 3.1 Oxygen and Water Vapor Attenuation 25.- 3.2 Total Slant Path Atmospheric Attenuation.- 3.3 Summary of Atmospheric Attenuation Procedure.- References.- 4 Hydrometeor Attenuation on Satellite Paths.- 4.1 Classical Development for Rain Attenuation.- 4.2 Rain Attenuation Measurements.- 4.3 Cloud and Fog Attenuation.- References.- 5 Rain Attenuation Prediction Methods.- 5.1 Rice Holmberg Rain Model.- 5.2 Dutton-Dougherty Attenution Prediction.- 5.3 Lin Rain Attenuation Model.- 5.4 Crane Global Rain Attenuation Model.- 5.5 CCIR Rain Attenuation Model.- 5.6 Summary.- References.- 6 Depolarization on Satellite Paths.- 6.1 Depolarization Caused By Rain.- 6.2 Ice Depolarization.- 6.3 Multipath Depolarization.- References.- 7 Radio Noise in Satellite Communications.- 7.1 Noise From Atmospheric Gases.- 7.2 Noise From Clouds.- 7.3 Noise From Rain.- 7.4 Noise From Surface Emissions.- 7.5 Noise From Extra-terrestrial Sources.- References.- 8 Scintillation, Bandwidth Coherence, and Other Propagation Factors.- 8.1 Scintillation.- 8.2 Bandwidth Coherence.- 8.3 Antenna Gain Degradation and Angle of Arrival Effects.- References.- 9 Propagation Effects on Communications Satellite Link Performance.- 9.1 Communications System Parameters.- 9.2 Link Performance in the Presence of Propagation Effects.- References.- 10 Restoration Techniques for Overcoming Severe Attenuation.- 10.1 Site Diversity.- 10.2 Power Control.- 10.3 Orbital Diversity.- 10.4 Spot Beams.- 10.5 Signal Processing Restoration Techniques.- 10.6 Summary.- References.- Appendix A Elevation Angle Dependence for Slant Path Communications Links.- Appendix B Interpolation Procedure for Atmospheric Attenuation Coefficients.- Appendix D Crane Global Rain Attenuation Model Calculation Procedure.- Appendix E CCIR Rain Attenuation Model Calculation Procedure.- Appendix F CCIR Tropospheric Scintillation Model Procedure.