Linear
Time Invariant System
•Linear
system means a system which possesses the property of superposition.
•Time
invariant system means its behavior and characteristics are fixed over time.
•Before
knowing Linear Time Invariant (LTI) system we should know what is convolution,
Laplace transform and Fourier transform.
•Convolution
is the mathematical way combining two signals to form third signal.
•Laplace
transform is use to find transfer function by taking Laplace transform of
output upon Laplace transform of input.
•Fourier
transform is having the similar relation like Laplace transform.
•We can get the transfer function from the impulse response.
•Impulse response is related to frequency response via Fourier transform.
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