Radiowave propagation and smart antennas for wireless communications /

• Κύριος συγγραφέας: Janaswamy, Ramakrishna, 1958-
• Μορφή: Ηλ. βιβλίο
• Γλώσσα: English
• Έκδοση: Boston : Kluwer Academic Publishers, �2001.
• Σειρά: Kluwer international series in engineering and computer science ; SECS 599.
• Θέματα: Wireless communication systems.; Radio wave propagation.; Adaptive antennas.; TECHNOLOGY & ENGINEERING > Telecommunications.; Electronic books.

 Useful as a text as well as a reference, this is one of the first books of its kind to combine basic and advanced topics of radiowave propagation and smart antennas into a single volume. The book is interdisciplinary in nature and contains material drawn from the electromagnetics and communications areas. Physical phenomena leading to the modeling and prediction of path loss, and characterizing the small-scale and medium-scale fluctuations of the received signal, are treated in detail. Several new path loss models are included. Both narrowband and wideband radio channel characterizations are discussed. Statistical descriptions of geometrically based single bounce scattering models that are useful in developing spatial channel models for smart arrays are presented. Principles of diversity and smart antennas for reducing fading and co-channel interference are presented. Performance evaluation of these arrays in the presence of fading and shadowing is treated. Both TDMA and CMDA systems are considered. Effects of element mutual coupling and correlation in limiting the system performance are elaborated. Finally, principles of multiple-input multiple-output communication systems that are increasingly becoming attractive owing to their enormous bit rate capabilities are covered. Several practical examples are worked out throughout the text. Additional problems that help the reader assimilate the material and advance to higher-level topics are included at the end of each chapter. Radiowave Propagation and Smart Antennas for Wireless Communications has been written for use in a graduate course on communications and represents a comprehensive reference for research scientists and practitioners working in fields related to the topic. 

 Cover -- Table of Contents -- Preface -- Chapter 1. Fundamentals of Cellular Radio -- 1. Introduction -- 2. The Cellular Concept -- 3. Multiple Access Schemes -- 4. Traffic Engineering -- 5. Summary -- Chapter 2. Principles of Radiowave Propagation -- 1. Introduction -- 2. Plane Waves -- 3. Classification of Electromagnetic Media -- 4. Free-Space Transmission -- 5. Plane Wave Reflections from Planar Interface -- 6. Radio Horizons -- 7. Two Ray Model Over Flat Earth -- 8. Effect of Obstacles -- 9. 3D Diffraction (UTD) -- 10. Forward Propagation -- 11. Summary -- Chapter 3. Median Signal Predictions -- 1. Introduction -- 2. Scales of Fading -- 3. Statistical Distribution of the Median Signal Level -- 4. Determination of Coverage Area from a Base Station -- 5. Empirical Models for Path Loss -- 6. Longley-Rice Model: -- 7. Summary -- Chapter 4. Characterization of Small Scale Fading -- 1. Introduction -- 2. Spatial Distribution of the Field -- 3. Spatial Correlation of Field -- 4. Summary -- Chapter 5. Wideband Characterization of the Radio Channel -- 1. Introduction -- 2. A Simple Two-Ray Model -- 3. Linear System Description -- 4. Random Time-Variant Communications Channels -- 5. Classification of Channels -- 6. Wideband Impulse Response of the Radio Channel -- 7. Power Delay Profile -- 8. Frequency Selectivity of Channel -- 9. Summary -- Chapter 6. Geometric Models for Angle and Time of Arrival -- 1. Introduction -- 2. General Formulation -- 3. Elliptical Scattering Model -- 4. Circular Scattering Model -- 5. Gaussian Scatter density -- 6. Summary -- Chaper 7. Spatial Diversity -- 1. Introduction -- 2. General Receive Array Theory -- 3. Combining Techniques -- 4. Selection Combining -- 5. Maximal Ratio Combining -- 6. Equal Gain Combining -- 7. Diversity Gain -- 8. Antenna Gain -- 9. Effect of Branch Correlation -- 10. Mutual Coupling -- 11. Summary -- Chapter 8. Smart Antennas -- 1. Introduction -- 2. Capacity Increase with Switched Beam Antenna -- 3. Adaptive Antennas -- 4. Summary -- Chapter 9. Multiple Input Multiple Output Wireless Communications -- 1. Introduction -- 2. MIMO Channel Capacity -- 3. Summary -- Appendices -- A-Numerical Generation of a Random Process -- B-Wideband Channel Model for N-Element Array -- C-Distribution of Hermitian Quadratic Forms in Complex Gaussian Variates -- 1. Matrix Preliminaries -- 2. Transformation of Variables -- 3. P.D.F. of Hermitian Quadratic Form