Digital Signal Processing Questions and Answers, Set 25

Digital Signal Processing Questions and Answers

Q1. 

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

Answer :  

4π/M

Q2. 

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

Answer :  

8π/M

Q3. 

What is the number of filter coefficients that specify the frequency response for h(n) symmetric?

Answer :  

(M+1)/2 when M is odd and M/2 when M is even

Q4. 

The ideal low-pass filter cannot be realized in practice.

Answer :  

True

Q5. 

In recursive systems, which of the following is caused by the nonlinearities due to the finite-precision arithmetic operations?

Answer :  

Periodic oscillations in the output

Q6. 

Which of the following is true when the response of the single-pole filter is in the limit cycle?

Answer :  

An actual non-linear system acts as an equivalent linear system

Q7. 

Which of the following rules is used in the bilinear transformation?

Answer : 

Trapezoidal rule

Q8. 

The Chebyshev polynomial is oscillatory in the range |x|<∞.

Answer :  

False

Q9. 

What is the value of the Chebyshev polynomial of degree 0?

Answer :  

1

Q10. 

Which of the following has to be performed in sampling rate conversion by a rational factor?

Answer :  

Interpolation

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