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The impulse response
is obtained at the output when the
input signal is the impulse signal
(§5.6). If the
th tap is denoted
, then it is
obvious from Fig.5.5 that the impulse response signal is
given by
![$\displaystyle h(n)\isdef \left\{\begin{array}{ll} 0, & n<0 \\ [5pt] b_n, & 0\leq n\leq M \\ [5pt] 0, & n> M \\ \end{array} \right. \protect$](img593.png) |
(6.6) |
In other words, the impulse response simply consists of the tap
coefficients, prepended and appended by zeros.
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