An Application of the Geometrical Theory of Diffraction to the Scattering of Radio Waves by Irregular Terrain
An Application of the Geometrical Theory of Diffraction to the Scattering of Radio Waves by Irregular Terrain

Author: R. H. Ott

Publisher:

Published: 1968

Total Pages: 80

ISBN-13:

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In this report, a method is developed for the quantitative evaluation of the effects of large irregularities or obstacles on the propagation of a radio wave. The fundamental tool used is Keller's "geometrical theory of diffraction." In contrast to previous methods for treating this problem, the one proposed here is not limited by 1) the type of terrain, 2) the polarization of the transmitting antenna, 3) the radiation pattern of the antenna, and 4) the frequency of the antenna (provided ka>̲ 5.0, where a is the characteristic dimension of the diffracting obstacle). A numerical example showing the antenna pattern behind a hemispherical hill illustrates the application of the theory.

Geometrical Theory of Diffraction for Electromagnetic Waves
Geometrical Theory of Diffraction for Electromagnetic Waves

Author: Graeme L. James

Publisher: IET

Published: 1986

Total Pages: 312

ISBN-13: 9780863410628

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The purpose of the book, apart from expounding the Geometrical Theory of Diffraction (GTD) method, is to present useful formulations that can be readily applied to solve practical engineering problems.

Monthly Catalog, United States Public Documents
Monthly Catalog, United States Public Documents

Author: United States. Superintendent of Documents

Publisher:

Published: 1968

Total Pages: 1716

ISBN-13:

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February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index

Wireless Channel Measurement and Modeling in Mobile Communication Scenario
Wireless Channel Measurement and Modeling in Mobile Communication Scenario

Author: Ruisi He

Publisher: CRC Press

Published: 2024-02-01

Total Pages: 236

ISBN-13: 1003830277

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This book delves into the fundamental characteristics, measurement techniques, modeling methods, and theories of wireless channels in mobile scenarios. Unlike wired communication systems, which are more predictable, wireless communication systems are significantly affected by radio propagation and wireless channels. By investigating the mechanisms of wireless channels and measurement techniques, this book aims to better understand wireless communication systems in order to optimize the quality and design of wireless communications. The title covers key topics in the field, including basic theory of radio wave propagation and non-stationary channels, theory and method of time-varying channel measurement, measurement case analysis, wireless channel modeling theory and parameter extraction method, rail traffic channel measurement and modeling, and dynamic modeling and simulation method of time-varying channels. This book is suitable for researchers and students interested in radio wave propagation, wireless channels and mobile communication systems. It can also serve as a useful guide for technical professionals who have a background in mobile communication technology.