Preface |
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ix | |
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1 | (20) |
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1 | (1) |
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1.2 Basic Principles of GNSS |
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2 | (6) |
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1.2.1 Time-Based Radio Navigation |
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2 | (3) |
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1.2.2 A 3D Time-Based Navigation System |
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5 | (3) |
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8 | (7) |
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1.4 Applications Including Differential GPS |
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15 | (6) |
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18 | (3) |
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2 Fundamental Considerations for GNSS Antennas |
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21 | (20) |
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2.1 GNSS Radio Wave Propagation |
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21 | (5) |
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2.1.1 Plane Waves and Polarisation |
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21 | (2) |
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2.1.2 GNSS Radio Wave Propagation and Effects |
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23 | (3) |
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2.1.3 Why CP Waves in GNSS? |
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26 | (1) |
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2.2 Antenna Design Fundamentals |
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26 | (5) |
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2.2.1 Antenna Fundamental Parameters |
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26 | (3) |
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2.2.2 LP Antenna Design and Example |
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29 | (2) |
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31 | (10) |
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2.3.1 CP Antenna Fundamentals and Types |
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31 | (4) |
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2.3.2 Simple CP Antenna Design Example |
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35 | (1) |
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2.3.3 Technical Challenges in Designing GNSS Antennas |
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36 | (4) |
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40 | (1) |
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3 Satellite GNSS Antennas |
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41 | (14) |
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3.1 Navigation Antenna Requirements |
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41 | (1) |
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3.2 Types of Antenna Deployed |
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41 | (9) |
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3.3 Special Considerations for Spacecraft Antenna Design |
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50 | (5) |
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3.3.1 Passive Intermodulation Effects |
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50 | (2) |
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3.3.2 Multipactor Effects |
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52 | (1) |
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52 | (3) |
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55 | (26) |
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4.1 Microstrip Antenna for Terminal GNSS Application |
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55 | (11) |
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4.1.1 Single-Feed Microstrip GNSS Antennas |
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55 | (5) |
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4.1.2 Dual-Feed Microstrip GNSS Antennas |
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60 | (4) |
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4.1.3 Design with Ceramic Substrate |
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64 | (2) |
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4.2 Spiral and Helix GNSS Antennas |
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66 | (7) |
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66 | (5) |
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71 | (2) |
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4.3 Design of a PIFA for a GNSS Terminal Antenna |
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73 | (8) |
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79 | (2) |
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5 Multimode and Advanced Terminal Antennas |
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81 | (30) |
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5.1 Multiband Terminal Antennas |
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81 | (14) |
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5.1.1 Multiband Microstrip GNSS Antennas |
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82 | (6) |
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5.1.2 Multiband Helix Antennas for GNSS |
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88 | (7) |
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5.2 Wideband CP Terminal Antennas |
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95 | (7) |
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5.2.1 Wideband Microstrip Antenna Array |
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95 | (1) |
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5.2.2 High-Performance Universal GNSS Antenna Based on Spiral Mode Microstrip Antenna Technology |
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96 | (1) |
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5.2.3 Wideband CP Hybrid Dielectric Resonator Antenna |
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96 | (2) |
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5.2.4 Multi-Feed Microstrip Patch Antenna for Multimode GNSS |
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98 | (4) |
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5.3 High-Precision GNSS Terminal Antennas |
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102 | (9) |
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109 | (2) |
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6 Terminal Antennas in Difficult Environments |
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111 | (38) |
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6.1 GNSS Antennas and Multipath Environment |
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111 | (2) |
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6.2 Statistical Modelling of Multipath Environment for GNSS Operation |
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113 | (6) |
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6.2.1 GPS Mean Effective Gain (MEGGPS) |
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114 | (2) |
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6.2.2 GPS Angle of Arrival Distribution (AOAGPS) |
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116 | (1) |
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6.2.3 GPS Coverage Efficiency (ηc) |
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117 | (2) |
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6.3 Open Field Test Procedure |
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119 | (2) |
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6.3.1 Measurement of GPS Mean Effective Gain |
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119 | (1) |
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6.3.2 Measurement of GPS Coverage Efficiency |
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120 | (1) |
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120 | (1) |
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6.4 Performance Assessment of GNSS Mobile Terminal Antennas in Multipath Environment |
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121 | (12) |
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6.4.1 Design of Tested GPS Antennas |
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122 | (5) |
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6.4.2 Comparison Based on Simulated and Measured 3D Radiation Patterns |
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127 | (2) |
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6.4.3 Comparison Based on Measured 3D Radiation Patterns and Actual Field Tests |
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129 | (4) |
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6.5 Performance Dependence on GNSS Antenna Orientation |
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133 | (6) |
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6.6 Performance Enhancement of GNSS Mobile Terminal Antennas in Difficult Environments |
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139 | (10) |
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140 | (1) |
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6.6.2 GPS Signal Reradiation |
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140 | (1) |
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141 | (1) |
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141 | (6) |
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147 | (2) |
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7 Human User Effects on GNSS Antennas |
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149 | (32) |
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7.1 Interaction of Human Body and GNSS Antennas |
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149 | (1) |
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7.2 Effects of Human Body on GNSS Mobile Terminal Antennas in Difficult Environments |
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150 | (31) |
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7.2.1 Design of Tested GPS Antennas |
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151 | (1) |
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7.2.2 Effects of Human Hand and Head Presence |
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151 | (15) |
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7.2.3 Effects of Complete Human Body Presence |
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166 | (13) |
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179 | (2) |
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8 Mobile Terminal GNSS Antennas |
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181 | (26) |
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181 | (2) |
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8.2 Antenna Specification Parameters |
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183 | (5) |
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183 | (1) |
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184 | (1) |
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185 | (1) |
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186 | (1) |
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187 | (1) |
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187 | (1) |
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188 | (1) |
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8.3 Classification of GNSS Terminals |
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188 | (2) |
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188 | (1) |
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188 | (1) |
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8.3.3 General Purpose Mobile Terminals |
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189 | (1) |
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8.4 Antenna Designs for Portable User Equipment |
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190 | (2) |
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8.4.1 Short Quadrifilar Helices |
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190 | (1) |
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191 | (1) |
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192 | (1) |
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8.5 The Function of the Platform |
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192 | (2) |
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8.5.1 Antenna Efficiency, Gain and Noise |
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193 | (1) |
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8.6 Comparing Antenna Performance on UEs |
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194 | (3) |
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194 | (1) |
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8.6.2 Non-Antenna Aspects of Performance |
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195 | (2) |
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197 | (4) |
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8.7.1 Positioning the GNSS Antenna on the Application Platform |
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197 | (3) |
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8.7.2 Evaluating the Implementation |
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200 | (1) |
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201 | (5) |
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201 | (1) |
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8.8.2 Case 1: Modified PIFA on Face of Small PCB |
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202 | (1) |
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8.8.3 Case 2: Meandered Dipole Antenna on Top Edge of Small PCB |
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203 | (1) |
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8.8.4 Case 3: Modified PIFA above LCD Display on Smart-Phone-Size Device |
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204 | (1) |
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8.8.5 Case 4: Moving Modified PIFA from One to Adjacent Corner of PCB |
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205 | (1) |
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8.8.6 Cases 5 and 6: Effects of Platform Electronics Noise |
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205 | (1) |
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206 | (1) |
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206 | (1) |
Appendix A Basic Principle of Decoding Information from a CDMA Signal |
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207 | (4) |
Appendix B Antenna Phase Characteristics and Evaluation of Phase Centre Stability |
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211 | (4) |
Index |
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215 | |