# Note that cos 05 3 page 7 of 17 602 fall 2012

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Unformatted text preview: r all n by the expression n x/ [n] = cos(π ) 3 and is plotted on the next page for n in [−3, 3]. (Note that cos( π ) = 0.5.) 3 Page 7 of 17 6.02 Fall 2012, Quiz 2 Figure 3: New input signal x/ [n]. This input is applied to the same system as before, namely the one with unit sample response h[n] = δ [n] − δ [n − 1] + δ [n − 2] . 9. [6 points]: Determine the output y / [n] of the system for this new input, for n = 0, 1, 2, 3, 4, 5. You only need show your computations for the ﬁrst three of these values. y / [0] = , y / [1] = , y / [2] = y / [3] = , y / [4] = , y / [5] = Page 8 of 17 6.02 Fall 2012, Quiz 2 Staying with the LTI system we have been considering, whose unit sample response is h[·] = δ [n] − δ [n − 1] + δ [n − 2] , suppose some input signal xc [n] to this system produces an output of 0 for all time. In other words, (h ∗ xc )[n] = 0 for all n. Consider now the composite system shown below, where the ﬁrst subsystem is a stable LTI system with some unknown unit sample response h...
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## This document was uploaded on 03/17/2014 for the course ELECTRICAL 6.02 at MIT.

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