The Frequency Response Then we can write v[n]=H(e/oe! Thus for a complex exponential input signal e on, the output of an lti discrete-time system is also a complex exponential signal of the same frequency multiplied by a complex constant H(e/) Thus eJon is an eigen function of the system Copyright C 2001, S K MitraCopyright © 2001, S. K. Mitra 11 The Frequency Response • Then we can write • Thus for a complex exponential input signal , the output of an LTI discrete-time system is also a complex exponential signal of the same frequency multiplied by a complex constant • Thus is an eigen function of the system j j n y n H e e   [ ] = ( ) ( ) j H e j n e  j n e 