The Frequency Response Most discrete-time signals encountered in practice can be represented as a linear combination of a very large, possibly infinite. number of sinusoidal discrete -time signals of different angular frequencies Thus, knowing the response of the lti system to a single sinusoidal signal, we can determine its response to more complicated signals by making use of the superposition property Copyright C 2001, S K. MitraCopyright © 2001, S. K. Mitra 7 The Frequency Response • Most discrete-time signals encountered in practice can be represented as a linear combination of a very large, possibly infinite, number of sinusoidal discrete-time signals of different angular frequencies • Thus, knowing the response of the LTI system to a single sinusoidal signal, we can determine its response to more complicated signals by making use of the superposition property