Dr. Wickert of University of Colorado publishes all his teaching material online for free. He teaches Signals & Systems, Signal Processing and Microwave circuit design. Fall 2011 and Spring 2011 courses are available.
- Modern Digital Signal Processing Fall 2011
- Microwave Circuit Design Fall 2011
- Introduction to Signals & Systems Spring 2011
- Real-Time Digital Signal Processing Spring 2011
- Statistical Signal Processing Spring 2011
- Phase-Locked Loops and Frequency Synthesis Summer 2011
Check the rest of the Dr.Wickert’s Signals & Systems courses here. There are more Signal Processing Courses from other universities.