University of Toronto ECE316 Fall 2011 CommunicaƟon Systems September 14, 2011 L±²ãçÙ± NÊã±Ý #3 Instructor: Ivo Maljević 2.2 ClassifcaƟon oF Signals (conƟnued) 1. ConƟnuous Time and Discrete Time Signals . 2. Analog and Digital Signals 3. Periodic and Aperiodic Signals (a) Periodic: signal g ( t ) is periodic if g ( t ) = g ( t + T0 ) for every t , where T0 is the smallest value that saƟs³es the equality expression. (b) Aperiodic: signals that are not periodic are called aperiodic 4. Energy and Power Signals (a) Energy signals: signals with ³nite energy (b) Power signals: signals with ³nite power 5. DeterminisƟc vs. Random Signals (a) DeterminisƟc: signals that are completely de³ned either graphically, or by an analyƟcal expression. (b) Random: signals that are known only in the probabilisƟc sense. During the lecture, we went over an example of how to determine the power of a periodic signal by doing the inte-graƟon over only one period. 2.3 Some useFul signal operaƟons and properƟes The following operaƟons on the signal argument (Ɵme) were covered in today's lecture:
This is the end of the preview. Sign up
access the rest of the document.
This note was uploaded on 01/30/2012 for the course ECE ECE316 taught by Professor Sousa during the Winter '11 term at University of Toronto.