Rf and if digitization in Radio Receivers: Theory, Concepts, and Examples

Document Outline

• Contents
• 1  Introduction
• 2  Analog-to-Digital Converters
  • 2.1  Sampling Methods and Analog Filtering
    • 2.1.1  Sampling at Twice the Maximum Frequency
    • 2.1.2  Out-of-Band Energy
    • 2.1.3  Realizable Anti-Aliasing Filters
    • 2.1.4  Oversampling
    • 2.1.5   Quadrature Sampling
    • 2.1.6  Bandpass Sampling for Direct Downconversion
  • 2.2  Effects of Quantization Noise, Distortion, and Receiver Noise
  • 2.3  Important Specifications
    • 2.3.1  Theoretical Signal-to-Noise Ratio Specifications
    • 2.3.2  Practical Specifications for Real ADCs
  • 2.4  ADC Conversion Methods
  • 2.5  ADC Performance vs. Sampling Rate
• 3  Digital Signal-Processing Requirements and Limitations
  • 3.1  Processors
  • 3.2  Real-Time Operation
  • 3.3  Algorithms
• 4  Potential Devices and Methods Useful in Radios Employing RF and IF Digitization
  • 4.1  Quantization Techniques
  • 4.2  Nonlinear Devices for Amplitude Compression
    • 4.2.1  Log Amplifiers
    • 4.2.2  Automatic Gain Control
  • 4.3  Postdigitization Algorithms for Improving Spurious Free Dynamic Range
  • 4.4  Sampling Downconverters
  • 4.5  Specialized Integrated Circuits
• 5  Examples of Radios Using RF or IF Digitization
• 6  Summary and Recommendations
• 7  References
• Appendix: Acronyms and Abbreviations