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ECE · Q441

Signal Processing

Engineering and GATE · ECE · question 441

Q441

Consider a four point moving average filter defined by the equation y [ n ] = _i = 0^3 _ix [ n - i ]. The condition on the filter coefficients that results in a null at zero frequency is

Consider a four point moving average filter defined by the equation     The condition on the filter coefficients that results in a null at zero frequency is
A.
α1 = α2 = 0; α0 = -α3
Answer
B.
α1 = α2 = 1; α0 = -α3
C.
α0 = α3 = 0; α1 = α2
D.
α1 = α2 = 0; α0 = α3

Answer: Option A

Solution

Answer: Option A
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