https://allsignalprocessing.com/category/lesson-categories/
https://www.digikey.com/en/resources/edu/arm-education-media...
http://www.eas.uccs.edu/~mwickert/ece5650/
http://www.eas.uccs.edu/~mwickert/ece5615/
http://www.naiant.com/SM/SM%20Forum%20Attachments/Other%20do...
Sorry I don't know if any of these are good. They're in my dsp bookmarks directory, I think I found these a while back when I was trying to relearn these topics.