Digital Signal Processing Questions and Answers
Q1.
The linear filtering operation followed by down sampling on x(n) is not time invariant.
Answer :
True
Q2.
It is impossible to design an all-pass digital Hilbert transformer.
Answer :
True
Q3.
Which of the following is the condition that an differentiator should satisfy?
Answer :
Zero response at zero frequency
Q4.
If the filter has anti-symmetric unit sample response with M odd, then what is the value of Q(ω)?
Answer :
sinω
Q5.
When |E(ω)|≤δ for all frequencies on the dense set, the optimal solution has been found in terms of the polynomial H(ω).
Answer :
True
Q6.
If the filter has anti-symmetric unit sample response with M even, then what is the value of Q(ω)?
Answer :
sin(ω/2)
Q7.
It is convenient to normalize W(ω) to unity in the stop band and set W(ω)=δ2/ δ1 in the pass band.
Answer :
True
Q8.
To reduce side lobes, in which region of the filter the frequency specifications have to be optimized?
Answer :
Transition band
Q9.
In the frequency sampling method for FIR filter design, we specify the desired frequency response Hd(ω) at a set of equally spaced frequencies.
Answer :
True
Q10.
The oscillatory behavior near the band edge of the low pass filter is known as Gibbs phenomenon.
Answer :
True
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