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**Unformatted text preview: **of weighted and time shifted impulse functions. Example: x [ n ] = x [ k ] " [ n # k ] k = #$ $ % x [ n ] = 2 [ n ] + 4 [ n # 1] # 3 [ n # 2] + [ n # 3] x(n) n 4 3 2 1-1-2-3 7 EE 200 Unit Impulse Sequence The Kronecker delta function has a sifting property when used in a summation. For each value of n, summation consists of an infinite number of x[k] [n-k] terms. Only one term, when k=n , is non-zero and is a delta function weighted by the value of x[k] . The delta function picks out the value of the function at one value of n. x [ n ] = x [ k ] " [ n # k ] k = #$ $ %...

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