The Frequency Response The quantity H(e/)is called the frequency response of the lti discrete-time system H(eo) provides a frequency-domain description of the system H(eu) is precisely the dtft of the impulse response hn of the system 12 Copyright C 2001, S K MitraCopyright © 2001, S. K. Mitra 12 The Frequency Response • The quantity is called the frequency response of the LTI discrete-time system • provides a frequency-domain description of the system • is precisely the DTFT of the impulse response {h[n]} of the system ( ) j H e ( ) j H e ( ) j H e