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Processeurs Dédiés au Traitement du Signal

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4-TAP FIR UTILISANT UN BUFFER CIRCULAIRE<br />

Coefficients<br />

a(3)<br />

a(2)<br />

a(1)<br />

a(0)<br />

Read<br />

x(0)<br />

x(1)<br />

x(2)<br />

x(3)<br />

Write<br />

x(4)<br />

Read<br />

x(4)<br />

x(1)<br />

x(2)<br />

x(3)<br />

y(<br />

n)<br />

3<br />

<br />

i0<br />

Read<br />

a(<br />

i)<br />

x(<br />

n<br />

y(3) = a(0) x(3) + a(1) x(2) + a(2) x(1) + a(3) x(0)<br />

y(4) = a(0) x(4) + a(1) x(3) + a(2) x(2) + a(3) x(1)<br />

y(5) = a(0) x(5) + a(1) x(4) + a(2) x(3) + a(3) x(2)<br />

Write<br />

x(5)<br />

x(4)<br />

x(5)<br />

x(2)<br />

x(3)<br />

<br />

i)<br />

30

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