现代无线通信系统电波传播 英文版PDF|Epub|txt|kindle电子书版本网盘下载

现代无线通信系统电波传播 英文版PDF格式电子书版下载

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第1章 蜂窝小区概念及传播预测的必要性 The Cellular Concept and the Need for Propagation Prediction1

1 The Cellular Concept and the Need for Propagation Prediction1

1.1 Concept of spatial reuse2

1.2 Linear cells as an example of FDMAspectrum reuse4

1.3 Hexagonal cells for area coverage6

1.3b Interference for symmetric reuse patterns8

1.3a Symmetric reuse patterns8

1.4 Sectored cells9

1.5 Spatial reuse for CDMA10

1.6 Summary12

Problems13

References13

2 Survey of Observed Characteristics of the Propagation Channel15

第2章 传播信道观测特性的测量 Survey of Observed Characteristics of the Propagation Channel15

2.1 Narrowband signal measurements16

2.1a Signal variation over small areas:fast fading18

2.1b Variations of the small-area average:shadow fading21

2.1c Separating shadow fading from range dependence22

2.2 Slope-intercept models for macrocell range dependence24

2.3 Range dependence for microcells:influence of street geometry26

2.3a LOS paths27

2.3b Zigzag and staircase paths in Sunset and Mission districts29

2.3cNon-LOSPaths in the high-rise core of San Francisco31

2.4 Multipath model for fast fading and other narrowband effects31

2.4a Frequency fading32

2.4b Time-dependent fading33

2.4d Depolarization34

2.4c Doppler spread34

2.5 Narrowband indoor signal propagation35

2.5a Fast fading for indoor links36

2.5b Distance dependence of small-area average38

2.6 Channel response for pulsed excitation39

2.6a Power delay profile40

2.6c Measures of time-delay spread42

2.6b Fading characteristics of individual pulses42

2.6d Coherence bandwidth45

2.7 Multipath observed at elevated base station antennas45

2.8 Summary47

Problems47

References49

第3章 平面波传播、反射和透射 Plane Wave Propagation,Reflection,and Transmission53

3 Plane Wave Propagation,Reflection,and Transmission53

3.1 Plane waves in an unbounded region54

3.1a Phasor notation56

3.1b Propagation oblique to the coordinate axes57

3.1c Fast fading due to several plane waves58

3.1d Correlation function and Doppler spread60

3.2 Reflection of plane waves at planar boundaries62

3.1e Fading at elevated base stations62

3.2a Snell s law63

3.2b Reflection and transmission coefficients for TE polarization64

3.2c Reflection and transmission coefficients for TM polarization66

3.2d Height gain for antennas above ground68

3.2e Reflection of circularly polarized waves69

3.3 Plane wave incidence on dielectric layers71

3.3a Reflection at a brick wall72

3.3b Reflection at walls with loss74

3.3c Transmission through walls of uniform construction76

3.3d Transmission through in-situ walls and floors79

3.4 Summary80

Problems81

References82

4 Antennas and Radiation85

第4章 天线和辐射 Antennas and Radiation85

4.1 Radiation of spherical waves86

4.2 Receiving antennas,reciprocity,and path gain or loss90

4.2a Path gain or loss91

4.2b Effective area of a receiving antenna92

4.2c Received power in the presence of a multipath95

4.3 Two-ray model for propagation above a flat earth96

4.3a Breakpoint distance98

4.3b Two-slope regression fit100

4.4 LOS Propagation in an urban canyon101

4.5 Cylindrical waves104

4.6 Summary104

Problems105

References106

5 Diffraction by Edges and Corners107

第5章 边缘和拐角的衍射 Diffraction by Edges and Corners107

5.1 Local nature of propagation108

5.1a Evaluation of the field distortion110

5.1b Interpretation of the local region in terms of Fresnel zones111

5.2 Plane wave diffraction by an absorbing half-screen113

5.2a Field in the illuminated region y＞0114

5.2b Field in the shadow region y＜0117

5.2c Geometrical theory of diffraction118

5.2d Evaluating the Fresnel integral for y near the shadow boundary118

5.2e Uniform theory of diffraction120

5.3 Diffraction for other edges and for oblique incidence122

5.3a Absorbing screen123

5.3b Conducting screen124

5.3c Right-angle wedge124

5.3d Plane waves propagating oblique to the edge126

5.4 Diffraction of spherical waves127

5.4a Diffraction for rays incident at nearly right angles to the edge128

5.4b Diffraction for rays that are oblique to the edge129

5.4c Path gain for wireless applications131

5.5 Diffraction by multiple edges132

5.5a Two parallel edges133

5.5b Two perpendicular edges135

Problems136

5.6 Summary136

References138

6 Propagation in the Presence of Buildings on Flat Terrain141

第6章 平地面上存在建筑物时的传播 Propagation in the Presence of Buildings on Flat Terrain141

6.1 Modeling propagation over rows of low buildings142

6.1a Components of the path gain143

6.1b Modeling PG2 by diffraction of the rooftop fields144

6.2 Approaches to computing the reduction PG1 of the rooftop fields147

6.2a Physical optics approach to cpmputing field reduction149

6.2b Solutions for uniform row spacing and building height149

6.3 Plane wave incidence for macrocell predictions150

6.3a Solution in terms of Borsma s functions151

6.3b Using the settled field to find the path loss154

6.4 Cylindrical wave incidence for microcell predictions157

6.4a Solution in terms of Borsma s functions158

6.4b Path loss for low base station antennas162

6.4c Path lossfor mobile-to-mobile propagation164

6.4d Propagation oblique to rows of buildings166

6.5 Numerical evaluation of fields for variable building height and row spacing168

6.5a Windowing to terminate the integration169

6.5b Discretization of the integration170

6.5c Height dependence of the settled field171

6.5d Influence of roof shape173

6.6 Summary176

Problems177

References178

7 Shadow Fading and the Effects of Terrain and Trees181

7.1 Shadow fading statistics181

第7章 阴影衰落和地形及树丛效应 Shadow Fading and the Effects of Terrain and Trees181

7.1a Variation of the rooftop fields182

7.1b Combined variations for street-level signal185

7.2 Modeling terrain effects187

7.2a Paths with LOS to the rooftops near the subscriber188

7.2b Paths with diffraction over bare wedge-shaped hills189

7.2c Paths with diffraction over bare cylindrical hills192

7.2d Diffraction of cylindrical waves over hills with buildings194

7.2e Path loss formulas for building-covered hills200

7.3 Modeling the effects of trees201

7.3a Propagation to subscribers in forested areas203

7.3b Path loss to subscribers in forest clearings206

7.3c Rows of trees in residential areas208

7.4 Summary211

Problems211

References213

8 Site-Specific Propagation Prediction217

第8章 特定场合中的传播预测 Site-Specific Propagation Prediction217

8.1 Outdoor predictions using a two-dimensional building database220

8.1a Image and pincushion methods221

8.1b Ray contributions to total power223

8.1c Comparison of predictions with measurements225

8.2 Two-dimensional predictions for a Manhattan street grid226

8.2a Path loss in turning one corner227

8.2b Predictions made using two-dimensional ray methods230

8.3 Outdoor predictions using a three-dimensional building database231

8.3a Three-dimensional pincushion method232

8.3b Vertical plane launch method234

8.3c Slant plane-vertical plane method237

8.3d Monte Carlo simulation of higher-order channel statistics238

8.4 Indoor site-specific predictions241

8.4a Transmission through floors243

8.4b Effect of furniture and ceiling structure on propagation over a floor245

8.5 Summary248

Problems249

References250

Index253