Digital Signal Processing Multiple Choice Questions and Answers

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

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer

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

View Answer

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 ≤ H_r(ω) ≤ 1+δ₂;|ω|≤ω_s

B 1+δ₂ ≤ H_r(ω) ≤ 1-δ₂;|ω|≥ω_s

C δ₂ ≤ H_r(ω) ≤ δ₂;|ω|≤ω_s

D -δ₂ ≤ H_r(ω) ≤ δ₂;|ω|≥ω_s

View Answer

Answer:-δ₂ ≤ H_r(ω) ≤ δ₂;|ω|≥ω_s

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

View Answer

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

View Answer

Answer:True

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