ECE 445S Real-Time Digital Signal Processing Laboratory - Lecture 4

Announcements

• Most Popular Programmming Languages: TIOBE Rankings - IEEE Spectrum (password needed)

Lecture

• Lecture 4 slides on Sampling and Aliasing in PowerPoint format.
  • Spring 2026, Part 1
    • Lecture Notes
    • Demos: Aliasing in water flowing and helicopter taking off
    • Demos: Rotating wheel from DSP First
  • Spring 2026, Part 2
    • Lecture Notes
    • Reduce aliasing effects in computer graphics: lowpass filter applied right of vertical bar; move vertical bar
    • Demo: Sampling and interpolation from DSP First
  • Not Presented
    • Demo: Audio interpolation demo using rectangular, triangular and truncated sinc pulses (Matlab script)
    • Rolling shutter camera artifacts and correction: Demo 1 - Demo 2 - Demo 3

• Spring 2014 lecture on video: Part 1 and Part 2

Supplemental Information

• Spring 2025, Part 1
  • Board. Aliasing in Amazing Water and Sound Experiment #2
  • Board. What happens when sampling rate equals cosine frequency?
  • Notes: TA lecture notes (Spring 2023)
• Spring 2025, Part 2
  • Board: Increase in sampling rate generally increases the filter order
  • Board: Different types of notch filters
  • Board: Linear Phase conditions
  • Notes: TA lecture notes (Spring 2023)
• Fall 2024, Part 2
  • Board. Sampling Theorem Review
  • Demo: Sampling and interpolation demos from DSP First
    • Board. Increasing sampling rate gives more samples per cosine period
  • Notes: TA lecture notes (Spring 2023)
• Spring 2024 Part 1
  • Board. Wireless Communication Resources
  • Demo. Aliasing in water flowing and helicopter taking off
  • Board. Aliasing in Amazing Water & Sound Experiment #2
  • Notes: TA lecture notes (Spring 2023)
• Spring 2024 Part 2
  • Demo: Sampling and interpolation demos from DSP First
  • Demo: Audio interpolation demo using rectangular, triangular and truncated sinc pulses (Matlab script)
  • Notes: TA lecture notes (Spring 2023)
• Fall 2023
  • Board: Sampling and analog-to-digital conversion
  • Board: Upsampling and interpolation
• Spring 2023
  • Celullar communications: 4G/5G Resources and 2G CDMA using PN sequences
  • Sampling Theorem
  • With increasing sampling rate comes increasing run-time complexity and filter order
• Fall 2021: Bandpass sampling for 2.4GHz Wi-Fi and downconversion
• Fall 2020 marker board notes on the Sampling Theorem
• Sampling and quantization of US Election Results
  • 2012 Red-Blue Map by Michael Gastner, Cosma Shalizi, and Mark Newman
  • 2008 Purple America by Robert J. Vanderbei

Last updated 03/04/26. Send comments to bevans@ece.utexas.edu