Digital Signal Processing Multiple Choice Questions and Answers

Questions

1 Which of the following defines the rectangular window function of length M-1?

w(n)=1, n=0,1,2...M-1
    =0, else where

w(n)=1, n=0,1,2...M-1
    =-1, else where

w(n)=0, n=0,1,2...M-1
    =1, else where

D None of the mentioned

View Answer

Answer:

w(n)=1, n=0,1,2...M-1
    =0, else where

2 The multiplication of the window function w(n) with h(n) is equivalent to the multiplication of H(w) and W(w).

A True

B False

View Answer

Answer:False

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3 What is the width of the main lobe of the frequency response of a rectangular window of length M-1?

A π/M

B 2π/M

C 4π/M

D 8π/M

View Answer

Answer:4π/M

4 The width of each side lobes decreases with an increase in M.

A True

B False

View Answer

Answer:True

5 With an increase in the value of M, the height of each side lobe ____________

A Do not vary

B Does not depend on value of M

C Decreases

D Increases

View Answer

Answer:Increases

6 As M is increased, W(ω) becomes wider and the smoothening produced by the W(ω) is increased.

A True

B False

View Answer

Answer:False

7 The width of each side lobes decreases with an decrease in M.

A True

B False

View Answer

Answer:False

8 What is the approximate transition width of main lobe of a Hamming window?

A 4π/M

B 8π/M

C 12π/M

D 2π/M

View Answer

Answer:8π/M

9 What is the peak side lobe (in dB) for a rectangular window?

A -13

B -27

C -32

D -58

View Answer

Answer:-13

10 What is the peak side lobe (in dB) for a Hanning window?

A -13

B -27

C -32

D -58

View Answer

Answer:-32

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