Digital Communications
Autor principal: | |
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Formato: | Electrónico eBook |
Idioma: | Inglés |
Publicado: |
Newark :
John Wiley & Sons, Incorporated,
2017.
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Colección: | New York Academy of Sciences Ser.
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Temas: | |
Acceso en línea: | Texto completo |
Tabla de Contenidos:
- Intro
- Title Page
- Copyright Page
- Contents
- Preface
- List of Abbreviations
- About the Companion Website
- Chapter 1 Signal Analysis
- 1.1 Relationship Between Time and Frequency Characteristics of Signals
- 1.1.1 Fourier Series
- 1.1.2 Fourier Transform
- 1.1.3 Fourier Transform of Periodic Functions
- 1.2 Power Spectal Density (PSD) and Energy Spectral Density (ESD)
- 1.2.1 Energy Signals Versus Power Signals
- 1.2.2 Autocorrelation Function and Spectral Density
- 1.3 Random Signals
- 1.3.1 Random Variables
- 1.3.2 Random Processes
- 1.4 Signal Transmission Through Linear Systems
- References
- Problems
- Chapter 2 Antennas
- 2.1 Hertz Dipole
- 2.1.1 Near- and Far-Field Regions
- 2.2 Linear Dipole Antenna
- 2.3 Aperture Antennas
- 2.4 Isotropic and Omnidirectional Antennas
- 2.5 Antenna Parameters
- 2.5.1 Polarization
- 2.5.2 Radiation Pattern
- 2.5.3 Directivity and Beamwidth
- 2.5.4 Gain
- 2.5.5 Effective Receiving Area
- 2.5.6 Effective Antenna Height and Polarization Matching
- 2.5.7 Impedance Matching
- References
- Problems
- Chapter 3 Channel Modeling
- 3.1 Wave Propagation in Low- and Medium-Frequency Bands (Surface Waves)
- 3.2 Wave Propagation in the HF Band (Sky Waves)
- 3.3 Wave Propagation in VHF and UHF Bands
- 3.3.1 Free-Space Propagation
- 3.3.2 Line-Of-Sight (LOS) Propagation
- 3.3.3 Fresnel Zones
- 3.3.4 Knife-Edge Diffraction
- 3.3.5 Propagation Over the Earth Surface
- 3.4 Wave Propagation in SHF and EHF Bands
- 3.4.1 Atmospheric Absorption Losses
- 3.4.2 Rain Attenuation
- 3.5 Tropospheric Refraction
- 3.5.1 Ducting
- 3.5.2 Radio Horizon
- 3.6 Outdoor Path-Loss Models
- 3.6.1 Hata Model
- 3.6.2 COST 231 Extension to Hata Model
- 3.6.3 Erceg Model
- 3.7 Indoor Propagation Models
- 3.7.1 Site-General Indoor Path Loss Models
- 3.7.2 Signal Penetration Into Buildings
- 3.8 Propagation in Vegetation
- References
- Problems
- Chapter 4 Receiver System Noise
- 4.1 Thermal Noise
- 4.2 Equivalent Noise Temperature
- 4.2.1 Equivalent Noise Temperature of Cascaded Subsystems
- 4.3 Noise Figure
- 4.3.1 Noise Figure of a Lossy Device
- 4.4 External Noise and Antenna Noise Temperature
- 4.4.1 Point Noise Sources
- 4.4.2 Extended Noise Sources and Brightness Temperature
- 4.4.3 Antenna Noise Figure
- 4.4.4 Effects of Lossy Propagation Medium on the Observed Brightness Temperature
- 4.4.5 Brightness Temperature of Some Extended Noise Sources
- 4.4.6 Man-Made Noise
- 4.5 System Noise Temperature
- 4.6 Additive White Gaussian Noise Channel
- References
- Problems
- Chapter 5 Pulse Modulation
- 5.1 Analog-to-Digital Conversion
- 5.1.1 Sampling
- 5.1.2 Quantization
- 5.1.3 Encoding
- 5.1.4 Pulse Modulation Schemes
- 5.2 Time-Division Multiplexing
- 5.2.1 Time Division Multiplexing
- 5.2.2 TDM Hierarchies
- 5.2.3 Statistical Time-Division Multiplexing