ECE 370: Signals and Systems

Lecture Notes and Course Materials

This repository contains comprehensive lecture notes and examples for ECE 370: Signals and Systems at The University of Alabama.

Download here!

Special thank you to the creater of jsk-lecnotes!

📚 Course Information

Course: ECE 370 - Signals and Systems
Institution: The University of Alabama
Department: Electrical and Computer Engineering
Instructor: Dr. Zhengnan Li
Semester offered: Fall 2025

🎯 Course Description

This course provides a comprehensive introduction to signals and systems analysis, covering both continuous-time and discrete-time domains. Students will learn fundamental concepts including Linear Time-Invariant (LTI) systems, Fourier analysis, sampling theory, and their applications in engineering.

📖 Topics Covered

1. Introduction to Signals and Systems

   • Signal classification and properties
   • System properties and representations
   • Energy and power signals

2. Linear Time-Invariant (LTI) Systems

   • Impulse response and convolution
   • System stability and causality
   • Differential and difference equations

3. Fourier Analysis

   • Fourier series for periodic signals
   • Continuous-time Fourier transform (CTFT)
   • Discrete-time Fourier transform (DTFT)
   • Fast Fourier transform (FFT) applications

4. Sampling and Reconstruction

   • Nyquist-Shannon sampling theorem
   • Aliasing and anti-aliasing filters
   • Practical ADC/DAC considerations

🛠️ Building the Notes

The lecture notes are written in Typst, a modern typesetting system. To compile the notes:

Prerequisites -- Install Typst:

# On macOS with Homebrew
brew install typst

# On Arch Linux
pacman -S typst

# Or download from https://github.com/typst/typst/releases

Compilation

To compile individual lecture notes:

cd lectures
typst compile lec.typ

Compiled PDFs will be generated in the current directory.

🔗 Useful Resources

• Primary Textbook: Signals and Systems by Oppenheim and Willsky
• MATLAB Documentation: Signal Processing Toolbox
• Interactive Demos: MIT OpenCourseWare 6.003
• Python Alternative: SciPy Signal Processing Tutorial

🤝 Contributing

Contributions to improve the notes are welcome! Please:

1. Fork the repository
2. Create a feature branch (git checkout -b feature/improvement)
3. Commit your changes (git commit -am 'Add new example')
4. Push to the branch (git push origin feature/improvement)
5. Open a Pull Request

For error corrections, please open an issue describing the error and its location.

📧 Contact

Dr. Zhengnan Li
Assistant Professor
Department of Electrical and Computer Engineering
The University of Alabama
Email: zhengnan.li (at) ua.edu

📄 License

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Code examples are licensed under the MIT License.

The lib.typ is adapoted from jsk-lecnotes, which is Apache-2.0 license licensed.

🙏 Acknowledgments

• The University of Alabama ECE Department
• Students who provided feedback and corrections
• Open-source signal processing community
• Contributors to the Typst typesetting system, and special shout out to @jskherman who made the template possible!

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Last Updated: November 2024
Version: Fall 2025