Happy New Semester.
to Signal & Systems:
Concept of signals & systems arise in a wide variety of fields
including: communications, circuit design, acoustic, biomedical engineering,
speech processing, image processing, and the forth. A signal represents
the changes of a physical phenomenon (quantity) as a function of independent
variables (usually time). In other words, signals are functions of
one or more independent variables that contain information about behavior
or nature of some phenomenon.
A system is defined as a physical devise that performs an operation
on a signal.
...see Powerpoint file in Downloads page.