Digital Signal Processing Questions and Answers, Set 21

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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