| Preface | p. xi |
| Scope of This Book | p. xi |
| Organisation of the Text | p. xi |
| Acknowledgements | p. xiii |
| Introduction | p. 1 |
| What Is a Software-Defined Radio? | p. 1 |
| The Requirement for Software-Defined Radio | p. 2 |
| Introduction | p. 2 |
| Legacy Systems | p. 2 |
| The Benefits of Multi-standard Terminals | p. 3 |
| Economies of Scale | p. 4 |
| Global Roaming | p. 4 |
| Service Upgrading | p. 4 |
| Adaptive Modulation and Coding | p. 5 |
| Operational Requirements | p. 5 |
| Key Requirements | p. 5 |
| Reconfiguration Mechanisms | p. 6 |
| Business Models for Software-Defined Radio | p. 7 |
| Introduction | p. 7 |
| Base-Station Model | p. 7 |
| Impact of OBSAI and CPRI | p. 11 |
| Handset Model | p. 12 |
| New Base-Station and Network Architectures | p. 13 |
| Separation of Digital and RF | p. 14 |
| Tower-Top Mounting | p. 15 |
| BTS Hoteling | p. 16 |
| Smart Antenna Systems | p. 18 |
| Introduction | p. 18 |
| Smart Antenna System Architectures | p. 19 |
| Power Consumption Issues | p. 19 |
| Calibration Issues | p. 21 |
| Projects and Sources of Information on Software Defined Radio | p. 22 |
| SDR Forum | p. 22 |
| World Wide Research Forum (WWRF) | p. 23 |
| European Projects | p. 23 |
| References | p. 24 |
| Basic Architecture of a Software Defined Radio | p. 25 |
| Software Defined Radio Architectures | p. 25 |
| Ideal Software Defined Radio Architecture | p. 26 |
| Required Hardware Specifications | p. 27 |
| Digital Aspects of a Software Defined Radio | p. 30 |
| Digital Hardware | p. 30 |
| Alternative Digital Processing Options for BTS Applications | p. 33 |
| Alternative Digital Processing Options for Handset Applications | p. 35 |
| Current Technology Limitations | p. 41 |
| A/D Signal-to-Noise Ratio and Power Consumption | p. 41 |
| Derivation of Minimum Power Consumption | p. 43 |
| Power Consumption Examples | p. 47 |
| ADC Performance Trends | p. 51 |
| Impact of Superconducting Technologies on Future SDR Systems | p. 54 |
| References | p. 55 |
| Flexible RF Receiver Architectures | p. 57 |
| Introduction | p. 57 |
| Receiver Architecture Options | p. 57 |
| Single-Carrier Designs | p. 57 |
| Multi-Carrier Receiver Designs | p. 60 |
| Zero IF Receiver Architectures | p. 60 |
| Use of a Six-Port Network in a Direct-Conversion Receiver | p. 82 |
| Implementation of a Digital Receiver | p. 84 |
| Introduction | p. 84 |
| Frequency Conversion Using Undersampling | p. 84 |
| Achieving Processing Gain Using Oversampling | p. 85 |
| Elimination of Receiver Spurious Products | p. 86 |
| Noise Figure | p. 88 |
| Receiver Sensitivity | p. 92 |
| Blocking and Intercept Point | p. 93 |
| Converter Performance Limitations | p. 95 |
| ADC Spurious Signals | p. 97 |
| Use of Dither to Reduce ADC Spurii | p. 107 |
| Alternative SFDR Improvement Techniques | p. 109 |
| Impact of Input Signal Modulation on Unwanted Spectral Products | p. 109 |
| Aperture Error | p. 110 |
| Impact of Clock Jitter on ADC Performance | p. 111 |
| Impact of Synthesiser Phase Noise on SDR Receiver Performance | p. 117 |
| Converter Noise Figure | p. 118 |
| Influence of Phase Noise on EVM for a Linear Transceiver | p. 120 |
| Introduction | p. 120 |
| SVE Calculation Without Phase Noise Disturbance | p. 122 |
| Approximation of a Local Oscillator Phase Noise Characteristic | p. 124 |
| Incorporation of the LO Phase Noise into the EVM Calculation | p. 125 |
| Example Results | p. 127 |
| EVM Performance of a Multi-Stage System | p. 131 |
| Relationship Between EVM, PCDE, and [rho] | p. 134 |
| References | p. 135 |
| Multi-Band and General Coverage Systems | p. 139 |
| Introduction | p. 139 |
| Multi-Band Flexible Receiver Design | p. 140 |
| The Problem of the Diplexer | p. 142 |
| RF Transmit/Receive Switch | p. 146 |
| Switched Diplexers | p. 151 |
| Diplexer Elimination by Cancellation | p. 152 |
| Achieving Image Rejection | p. 158 |
| Introduction | p. 158 |
| Use of a High IF | p. 158 |
| Image-Reject Mixing | p. 159 |
| Dynamic Range Enhancement | p. 170 |
| Feedback Techniques | p. 171 |
| Feedforward Techniques | p. 173 |
| Cascaded Non-Linearity Techniques | p. 178 |
| Use of Diplexer Elimination, Image-Reject Mixing, and High Dynamic Range Techniques in a Receiver | p. 179 |
| References | p. 180 |
| Flexible Transmitters and PAs | p. 183 |
| Introduction | p. 183 |
| Differences in PA Requirements for Base Stations and Handsets | p. 184 |
| Comparison of Requirements | p. 184 |
| Linearisation and Operational Bandwidths | p. 185 |
| Linear Upconversion Architectures | p. 186 |
| Analogue Quadrature Upconversion | p. 186 |
| Quadrature Upconversion with Interpolation | p. 194 |
| Interpolated Bandpass Upconversion | p. 197 |
| Digital IF Upconversion | p. 198 |
| Multi-Carrier Upconversion | p. 199 |
| Weaver Upconversion | p. 201 |
| Non-Ideal Performance of High-Speed DACs | p. 204 |
| Linear Transmitter Utilising an RF DAC | p. 205 |
| Use of Frequency Multiplication in a Linear Upconverter | p. 209 |
| Constant-Envelope Upconversion Architectures | p. 210 |
| PLL-Based Reference or Divider Modulated Transmitter | p. 210 |
| PLL-Based Directly-Modulated VCO Transmitter | p. 211 |
| PLL-Based Input Reference Modulated Transmitter | p. 212 |
| Use of a Direct-Digital Synthesizer to Modulate a PLL-Based Transmitter | p. 213 |
| A PLL-Based Transmitter Utilising Modulated Fractional-N Synthesis | p. 213 |
| Broadband Quadrature Techniques | p. 215 |
| Introduction to Quadrature Techniques | p. 216 |
| Active All-Pass Filter | p. 216 |
| Use of Highpass and Lowpass Filters | p. 217 |
| Polyphase Filtering | p. 221 |
| Broadband Passive All-Pass Networks | p. 222 |
| Multi-Zero Networks | p. 225 |
| Tunable Broadband Phase Splitter | p. 225 |
| Lange Coupler | p. 227 |
| Multiplier-Divider Techniques | p. 228 |
| References | p. 229 |
| Linearisation and RF Synthesis Techniques Applied to SDR Transmitters | p. 233 |
| Introduction | p. 233 |
| Power Amplifier Linearisation Techniques | p. 233 |
| Predistortion | p. 234 |
| Analogue Predistortion | p. 234 |
| Feedforward | p. 244 |
| Basic Operation | p. 245 |
| Power Efficiency | p. 248 |
| Maintaining Feedforward System Performance | p. 251 |
| Performance Stabilisation Techniques | p. 253 |
| Relative Merits of the Feedforward Technique | p. 261 |
| Transmitter Linearisation Techniques | p. 262 |
| Digital Predistortion | p. 262 |
| Relative Merits of Predistortion Techniques | p. 276 |
| Feedback Techniques | p. 277 |
| RF Feedback | p. 277 |
| Envelope Feedback | p. 278 |
| Polar Loop | p. 280 |
| Cartesian Loop | p. 284 |
| RF Synthesis Techniques | p. 287 |
| Polar RF Synthesis Transmitter | p. 287 |
| Sigma-Delta Techniques | p. 295 |
| Power Efficiency | p. 296 |
| Summary of the Relative Merits of Various Linear Amplifier and Transmitter Techniques | p. 297 |
| References | p. 301 |
| 90[degree] Phase-Shift Networks | p. 305 |
| General Structure | p. 305 |
| Reference | p. 309 |
| Phase Noise in RF Oscillators | p. 311 |
| Leesons Equation | p. 311 |
| SSB Phase Noise Characteristic of a Basic Oscillator | p. 311 |
| Leesons Equation | p. 311 |
| References | p. 312 |
| Acronyms and Abbreviations | p. 313 |
| About the Author | p. 319 |
| Index | p. 321 |
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