The LTI Channel Model

A fundamental assumption for both QuickEye and VerifEye is the channel can be treated as a linear time-invariant (LTI) system characterized by a step response. QuickEye and VerifEye are based on the principle of superposition, which makes use of this assumption. Forcing an LTI approximation allows a convolution-based approach to solving the time domain problem. The following topics show how the step response (and the related edge response) can be understood in terms of LTI systems theory.