Lecture 2 - 1/6/2010 Signals and Systems EE314: Lecture 2...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1/6/2010 1 EE314: Lecture 2 Review of Signals Signals and Systems A signal is a set of information or data, and mathematically represented by a function of time. A system is a combination of devices and networks to perform a desired operation on signals. Signal Classification Energy signal vs. Power signal Continuous-time signal vs. Discrete-time signal Analog signal vs. Digital signal Periodic vs. Aperiodic signal Deterministic signal vs. Random signal Engergy and Power Signal Energy Energy signal: if E g <∞. Signal Power Power signal : if P g <∞. Examples Sometimes uses dBW, dBmW to represent signal power when it is very small or large. (J) | ) ( | 2 dt t g E g (W) | ) ( | 1 lim 2 2 2 T T T g dt t g T P t t g t t t g e t g t 7 ) ( ) 6 / 5 cos( 4 ) 3 sin( 2 1 ) ( ) ( 3 2 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1/6/2010 2 Energy and Power Signals Figure 2.1 Examples of signals: (a) signal with finite energy;
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/13/2010 for the course EE EE 314 taught by Professor Zhang during the Winter '10 term at Cal Poly.

Page1 / 5

Lecture 2 - 1/6/2010 Signals and Systems EE314: Lecture 2...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online