I had a very distracted signals/systems prof who managed to make a difficult subject even harder. I did acceptably in the class, and I’ve gotten by on rules of thumb and simulation for 20 years, but my intuition and technical ability with anything but basic transfer functions is terrible and I want to improve. Do you have a favorite (preferably physical) reference for signals/controls that you like?
My professor was excellent in this field. He wrote a book but ironically didn’t teach from his book in class. I think that it was because of his humble personality:
The author is a talented DSP engineer (iirc he developed the backscatter machines used at airports), and the material is presented in a way that is easily digestible for engineers. Best of all, the book is available for free on the above website. Because you mentioned a physical copy, it is available as a textbook.