Do not take this Professor at any cost. Nobody could follow anything he's doing and when it came to exam time I was extremely under prepared. the HW is not helpful and the lecture notes are a mess, the TA discussion notes are somehow worse. He doesn't post solutions for his exams so you won't have the option to review what you did wrong on the midterm while preparing for the final. I alway fall asleep during his lectures, yes they are that boring and it's all theory. There is an extra credit project that im unsure as to how much its worth but that too doesn't depend on your knowledge from this class but rather your knowledge on Python and machine learning.

This class was a pain and this prof didn't help to relive that. The lectures are quite dry and boring, but prof is able to explain the concepts somewhat well. You just need to really pay attention and think about it, but that's nearly impossible IMO. I highly recommend reading the textbook bc you'll receive some idea on what's going on. The homework is pretty hard and confusing so you'll need to spend quite some time to understand or have someone help you out. The midterm and final are quite difficult as well and most of the class doesn't do well for either. One good thing that prof has is a extra credit project where you use the machine learning library in PyTorch for a communications related project. It wasn't that particularly difficult as most of the code was given. Overall, the material in general is difficult, but quite amazing when you start to get some idea on how communication systems work.

It will forever elude me why the department insists on having Lorenzelli teach every class having to do with signals and systems. This is my 3rd time being forced to take a class with him and just like the last two times, it was dogshit. He is extremely unclear in his lectures and you will not be able to learn anything conceptually or application-wise. He is all about deriving equations you never use from rigorous mathematical theory and never stopping to annotate or explain what anything means. This is a class where I spent the majority of my time just trying to understand the solutions manual to the homework.

Extremely overrated professor. I don't know how he is for 131A, but for 132A, all he does is mumble, scribble on the board, and make mistakes. He offers no applicable real life examples and insists in indulging in the pure mathematical theory.

His grading scale is also WAY overblown, he is not a generous grader at all...

All in all, if you are an EE student who likes think in terms of practicality, forget Lorenzelli.

Go for Villasenor, I hear he accompanies the theory with application.

Excellent professor. His lectures are very easy to follow and he definately knows his stuff. He is brilliant yet modest and I think he was definately one of my favorite professors at UCLA, for his knowledge, approachability, and yes, he is very nice. He could have given me an F and I'd still have no negative opinions of him.