Software Radio

• The first systematic guide to software radio design and implementation
• Multirate DSP, RF front-ends, direct digital synthesis of modulated waveforms, A/D and D/A conversion, and more
• Enhancing performance through smart antennas and other adaptive array algorithms
• Techniques for building more flexible, extensible software

• Central role of multirate DSP in software radio design
• Constructing RF front-ends: utilizing digital processing to overcome key problems in RF design
• Direct digital synthesis of modulated waveforms
• A/D and D/A converters and conversion processes: key tradeoffs among resolution, sample rate, and dynamic range
• Enhancing performance through smart antennas and other adaptive array algorithms
• Practical techniques for choosing among DSP microprocessors, FPGAs, and ASICs
• A systematic, object-oriented approach to creating flexible software

Contents

• 1. Introduction to Software Radio Concepts.
• The Need for Software Radios.
• What Is a Software Radio?
• Characteristics and Benefits of a Software Radio.
• Design Principles of a Software Radio.
• Questions.

• 2. Radio Frequency Implementation Issues.
• The Purpose of the RF Front-End.
• Dynamic Range: The Principal Challenge of Receiver Design.
• RF Receiver Front-End Topologies.
• Enhanced Flexibility of the RF Chain with Software Radios.
• Importance of the Components to Overall Performance.
• Transmitter Architectures and Their Issues.
• Noise and Distortion in the RF Chain.
• ADC and DAC Distortion.
• Predistortion.
• Flexible RF Systems Using Microelectromechanical Systems.
• Conclusion.
• Questions.

• 3 Multirate Signal Processing.
• Introduction.
• Sample Rate Conversion Principles.
• Polyphase Filters.
• Digital Filter Banks.
• Timing Recovery in Digital Receivers Using Multirate Digital Filters.
• Conclusion.
• Questions.

• 4. Digital Generation of Signals.
• Introduction.
• Comparison of Direct Digital Synthesis with Analog Signal Synthesis.
• Approaches to Direct Digital Synthesis.
• Analysis of Spurious Signals.
• Spurious Components due to Periodic Jitter.
• Bandpass Signal Generation.
• Performance of Direct Digital Synthesis Systems.
• Hybrid DDS-PLL Systems.
• Applications of Direct Digital Synthesis.
• Generation of Random Sequences.
• ROM Compression Techniques.
• Sine-Phase Difference AlgorithmApproach.
• Modified Sine-Phase Difference Approach (Parabolic Approximation).
• Conclusion.
• Questions.

• 5. Analog to Digital and Digital to Analog Conversion.
• Introduction.
• Parameters of Ideal Data Converters.
• Parameters of Practical Data Converters.
• Techniques to Improve Data Converter Performance.
• Common ADC and DAC Architectures.
• Conclusion.
• Questions.

• 6 Smart Antennas.
• Introduction.
• Vector Channel Modeling.
• Benefits of Smart Antennas.
• Structures for Beamforming Systems.
• Smart Antenna Algorithms.
• Diversity and Space-Time Adaptive Signal Processing.
• Algorithms for Transmit STAP.
• Hardware Implementation of Smart Antennas.
• Array Calibration.
• Virginia Tech Space-Time Adaptive Radio Case Study.
• Conclusion.
• Questions.

• 7. Digital Hardware Choices.
• Introduction.
• Key Hardware Elements.
• DSP Processors.
• Field Programmable Gate Arrays.
• Trade-Offs in Using DSPs, FPGAs, and ASICs.
• Power Management Issues.
• Using a Combination of DSPs, FPGAs, and ASICs.
• Conclusion.
• Questions.

• 8. Object-Oriented Representation of Radios and Network Resources.
• Introduction.
• Networks.
• Object-Oriented Programming.
• Object Brokers.
• Mobile Application Environments.
• Joint Tactical Radio System.
• Conclusion.
• Questions.

• 9. Case Studies In Software Radio Design.
• Introduction and a Historical Perspective.
• SPEAKeasy.
• JTRS.
• Wireless Information Transfer System.
• SDR-3000 Digital Transceiver Subsystem.
• SpectrumWare.
• CHARIOT.
• Conclusion.
• Questions.

• Appendix A. Rf Engineering Books And Trade Publications.
• Electronics.
• RF Circuit Design and S-Parameters.
• Filters.
• Microwaves.
• Oscillators.
• Phase Locked Loops and Frequency Synthesizers.
• Receivers and Systems.
• Pspice.
• Trade Publications and Periodicals.
• Web-Accessible Tutorial Materials.

• Appendix B. The Coordinate Rotation Digital Computer Algorithm.
• Introduction.
• CORDIC Overview.
• Derivation of the CORDIC Algorithm.
• Translating a Point Along a Circle of Radius R.
• CORDIC AlgorithmPerformance.
• Extensions to the CORDIC Algorithm.