4 discrete lti
DESCRIPTION
signal and systemTRANSCRIPT
-
Chapter 2Discrete LTIPrepared by Dr. Taha MAhdy
-
Discrete vs. continuousThe same concepts.a discrete time signal is one for which the time variable is defined only at specific discrete times. Such a signal can be realized by sampling a continuous time signal x(t) to form a collection or list of numbers x[n].
-
The difference between successive time steps is called the sampling interval.
-
Important Formulas
-
The unit impulse
-
Similar conceptsEven and odd functionsSketching System properties (linearity, time invariant, stability, causality, memory)Replace integral with summationEvery thing work as continuous
-
Discrete Linear Time-Invariant Systems
-
Compute the convolution
-
The result
-
Compute convolution
-
Block Diagram andDifference equations
-
Homework
-
Next lecture (Z transform)The following lecture, the midterm.