How do I describe my "academic profile" for graduate school application?
Projects completed are more important than skills learned from coursework. Give preference to what distinguishes you from every other student. If you did an internship, mention that. If you worked on a project at a university department, mention that. If you did a Bachelor's Thesis, write about what you did there.

Saying something like "I learned about LTI systems in course X and I acquired MATLAB programming skills in course Y" will not distinguish you from every other Electrical Engineering student, so those statements should have the last priority.