The second-order AR filter has feedback coefficients a1=0.9 and a2=0.5 and feedforward coefficient b0 = 1. The value of the unit-sample response h2 = ________(x.xx).
Fill in the blank(s) with the appropriate word(s).
yi = 0.9yi-1 +0.5yi-2 + xi. When xi = di, yi= hi and zero initial conditions:
y0=x0 =1
y1=0.9y0=0.9
y2=0.9y1+0.5y0 = 0.81 + 0.25 = 1.06
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