PySDR: A Guide to SDR and DSP using Python

by Dr. Marc Lichtman

• 1. Introduction
  • Purpose and Target Audience
  • Contributing
  • Acknowledgements
• 2. Frequency Domain
  • Fourier Series
  • Time-Frequency Pairs
  • Fourier Transform
  • Time-Frequency Properties
  • Fast Fourier Transform (FFT)
  • Negative Frequencies
  • Order in Time Doesn’t Matter
  • FFT in Python
  • Windowing
  • FFT Sizing
  • Spectrogram/Waterfall
  • FFT Implementation
• 3. IQ Sampling
  • Sampling Basics
  • Nyquist Sampling
  • Quadrature Sampling
  • Complex Numbers
  • Complex Numbers in FFTs
  • Receiver Side
  • Carrier and Downconversion
  • Receiver Architectures
  • Baseband and Bandpass Signals
  • DC Spike and Offset Tuning
  • Sampling Using our SDR
  • Calculating Average Power
  • Calculating Power Spectral Density
  • Further Reading
• 4. Digital Modulation
  • Symbols
  • Wireless Symbols
  • Amplitude Shift Keying (ASK)
  • Phase Shift Keying (PSK)
  • IQ Plots/Constellations
  • Quadrature Amplitude Modulation (QAM)
  • Frequency Shift Keying (FSK)
  • Differential Coding
  • Python Example
  • Further Reading
• 5. PlutoSDR in Python
  • Software/Drivers Install
  • Receiving
  • Transmitting
  • Transmitting and Receiving Simultaneously
  • Reference API
  • Python Exercises
• 6. USRP in Python
  • Software/Drivers Install
  • Receiving
  • Transmitting
  • Transmitting and Receiving Simultaneously
  • Subdevice, Channels, and Antennas
  • Syncing to 10 MHz and PPS
• 7. Noise and dB
  • Gaussian Noise
  • Decibels (dB)
  • Noise in Frequency Domain
  • Complex Noise
  • AWGN
  • SNR and SINR
  • External Resources
• 8. Filters
  • Filter Basics
  • Filter Representation
  • Filter Implementation
  • Filter Design Tools
  • Convolution
  • Filter Design in Python
  • Intro to Pulse Shaping
• 9. Link Budgets
  • Introduction
  • Signal Power Budget
  • Noise Power Budget
  • SNR
  • Example Link Budget: ADS-B
• 10. Channel Coding
  • Why We Need Channel Coding
  • Types of Codes
  • Code-Rate
  • Modulation and Coding
  • Hamming Code
  • Soft vs Hard Decoding
  • Shannon Limit
  • State of the Art Codes
• 11. IQ Files and SigMF
  • Binary Files
  • Python Examples
  • Visually Analyzing an RF File
  • Max Values and Saturation
  • SigMF and Annotating IQ Files
• 12. Multipath Fading
  • Multipath
  • Fading
  • Simulating Rayleigh Fading
  • Mitigating Multipath Fading
• 13. Pulse Shaping
  • Inter-Symbol-Interference (ISI)
  • Matched Filter
  • Splitting a Filter in Half
  • Specific Pulse Shaping Filters
  • Roll-Off Factor
  • Python Exercise
• 14. Synchronization
  • Introduction
  • Simulating Wireless Channel
  • Time Synchronization
  • Time Synchronization with Interpolation
  • Coarse Frequency Synchronization
  • Fine Frequency Synchronization
  • Frame Synchronization
• 15. End-to-End Example
  • Introduction to FM Radio and RDS
  • The RDS Signal
  • Acquiring a Signal
  • FM Demodulation
  • Frequency Shift
  • Filter to Isolate RDS
  • Decimate by 10
  • Resample to 19 kHz
  • Time Synchronization (Symbol-Level)
  • Fine Frequency Synchronization
  • Demodulate the BPSK
  • Differential Decoding
  • RDS Decoding
  • RDS Parsing
  • Wrap-Up and Final Code
  • Acknowledgments
  • Further Reading
• 16. DOA & Beamforming
  • Overview and Terminology
  • SDR Requirements
  • Array Factor Math
  • Receiving a Signal
  • Basic DOA
  • 180 Degree Ambiguity
  • Broadside of the Array
  • When d is not λ/2
  • Antennas
  • Number of Elements
  • Capon’s Beamformer
  • MUSIC
  • ESPRIT
  • 2D DOA
  • Steering Nulls
  • Conclusion and References
• 17. Phased Arrays with Phaser
  • Intro to Phased Arrays
  • Hardware Overview
  • SD Card Preparation
  • Hardware Preparation
  • Software Install
  • HB100 Setup
  • Calibration
  • Pre-built Example App
  • Phaser in Python
• 18. About the Author