5.iNtroduction An LTI system can be characterized in time domain by impulse response hn] Output of the Lti system ]=x*=∑xk-k] With Fourier transform and z-transform an LTI system can be characterized Cin Z-domain by system function H(z) Y(z)=H()x()y(e")=h(e)x(e") Cin frequency-domain by Frequency response H3 5.0 Introduction ◆An LTI system can be characterized in time domain by impulse response ◆Output of the LTI system: h n              =− =  = − k y n x n h n x k h n k Y(z) = H(z)X(z) ◆in Z-domain by system function ◆in frequency-domain by Frequency response ( ) ( ) ( ) j w j w j w Y e = H e X e ◆With Fourier Transform and Z-transform, an LTI system can be characterized H z( ) ( ) jw H e