Digital Signal Processing Questions and Answers
Q1.
What is the approximate transition width of main lobe of a Blackman window?
Answer :
12π/M
Q2.
The width of each side lobes decreases with an increase in M.
Answer :
True
Q3.
The lower and upper limits on the convolution sum reflect the causality and finite duration characteristics of the filter.
Answer :
True
Q4.
What is the number of filter coefficients that specify the frequency response for h(n) anti-symmetric?
Answer :
(M-1)/2 when M is odd and M/2 when M is even
Q5.
The magnitude function |H(ω)| can be zero at some frequencies, but it cannot be zero over any finite band of frequencies.
Answer :
True
Q6.
The oscillations in the output of the recursive system are called as ‘limit cycles’.
Answer :
True
Q7.
The limit cycle mode with zero input, which occurs as a result of rounding the multiplications, corresponds to an equivalent second order system with poles at z=±1.
Answer :
True
Q8.
In bilinear transformation, the left-half s-plane is mapped to which of the following in the z-domain?
Answer :
Entirely inside the unit circle |z|=1
Q9.
The chebyshev-I filter is equi-ripple in pass band and monotonic in the stop band.
Answer :
True
Q10.
What is the value of chebyshev polynomial of degree 1?
Answer :
x
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