Digital Signal Processing Questions and Answers | Digital Signal Processing MCQs

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Questions
1 The linear equations for determining {h(n)} from {H(k+α)} are not simplified.
A True
B False

Answer:False
2 The major advantage of designing linear phase FIR filter using frequency sampling method lies in the efficient frequency sampling structure.
A True
B False

Answer:True
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3 Which of the following is introduced in the frequency sampling realization of the FIR filter?
A Poles are more in number on unit circle
B Zeros are more in number on the unit circle
C Poles and zeros at equally spaced points on the unit circle
D None of the mentioned

Answer:Poles and zeros at equally spaced points on the unit circle
4 In a practical implementation of the frequency sampling realization, quantization effects preclude a perfect cancellation of the poles and zeros.
A True
B False

Answer:True
5 In the frequency sampling method for FIR filter design, we specify the desired frequency response Hd(ω) at a set of equally spaced frequencies.
A True
B False

Answer:True
6 Why is it desirable to optimize frequency response in the transition band of the filter?
A Increase side lobe
B Reduce side lobe
C Increase main lobe
D None of the mentioned

Answer:Reduce side lobe
7 Which of the following filter design is used in the formulation of design of optimum equi ripple linear phase FIR filter?
A Butterworth approximation
B Chebyshev approximation
C Hamming approximation
D None of the mentioned

Answer:Chebyshev approximation
8 If δ2 represents the ripple in the stop band for a chebyshev filter, then which of the following conditions is true?
A 1-δ2 ≤ Hr(ω) ≤ 1+δ2;|ω|≤ωs
B 1+δ2 ≤ Hr(ω) ≤ 1-δ2;|ω|≥ωs
C δ2 ≤ Hr(ω) ≤ δ2;|ω|≤ωs
D2 ≤ Hr(ω) ≤ δ2;|ω|≥ωs

Answer:-δ2 ≤ Hr(ω) ≤ δ2;|ω|≥ωs
9 If the filter has anti-symmetric unit sample response with M even, then what is the value of Q(ω)?
A cos(ω/2)
B sin(ω/2)
C 1
D sinω

Answer:sin(ω/2)
10 It is convenient to normalize W(ω) to unity in the stop band and set W(ω)=δ2/ δ1 in the pass band.
A True
B False

Answer:True

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