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 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 because of 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 :
Actual non-linear system acts as an equivalent linear system
Q7.
Which of the following rule 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 chebyshev polynomial of degree 0?
Answer :
1
Q10.
Which of the following has to be performed in sampling rate conversion by rational factor?
Answer :
Interpolation
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