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Free download in PDF Digital Signal Processing Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like UPSC, NDA, SSC etc. These short solved questions or quizzes are provided by Gkseries./p>
(1)
Which of the following defines the weighted approximation error?
[A]
W(ω)[Hdr(ω)+Hr(ω)]
[B]
W(ω)[Hdr(ω)-Hr(ω)]
[C]
W(ω)[Hr(ω)-Hdr(ω)]
[D]
None of the mentioned
Answer: W(ω)[Hdr(ω)-Hr(ω)]
(2)
The error function E(ω) does not alternate in sign between two successive extremal frequencies.
(3)
At most how many extremal frequencies can be there in the error function of ideal low pass filter?
[A]
L+1
[B]
L+2
[C]
L+3
[D]
L
(4)
The filter designs that contain more than L+2 alternations are called as ______________
[A]
Extra ripple filters
[B]
Maximal ripple filters
[C]
Equi ripple filters
[D]
None of the mentioned
Answer: Extra ripple filters
(5)
If M is the length of the filter, then at how many number of points, the error function is computed?
[A]
2M
[B]
4M
[C]
8M
[D]
16M
(6)
If |E(ω)|< δ for some frequencies on the dense set, then a new set of frequencies corresponding to the L+2 largest peaks of |E(ω)| are selected and computation is repeated.
(7)
What is the value of JTYPE in the Parks-McClellan program for a Hilbert transformer?
(8)
In Parks-McClellan program, the grid density for interpolating the error function is denoted by which of the following functions?
[A]
NFILT
[B]
NBANDS
[C]
EDGE
[D]
-LGRID
(9)
In Parks-McClellan program, an array of maximum size 10 that specifies the desired frequency response in each band is denoted by?
[A]
WTX
[B]
FX
[C]
EDGE
[D]
None of the mentioned
(10)
If δ1 represents the ripple in the pass band for a chebyshev filter, then which of the following conditions is true?
[A]
1-δ1 ≤ Hr(ω) ≤ 1+δ1; |ω|≤ωP
[B]
1+δ1 ≤ Hr(ω) ≤ 1-δ1; |ω|≥ωP
[C]
1+δ1 ≤ Hr(ω) ≤ 1-δ1; |ω|≤ωP
[D]
1-δ1 ≤ Hr(ω) ≤ 1+δ1; |ω|≥ωP
Answer: 1-δ1 ≤ Hr(ω) ≤ 1+δ1; |ω|≤ωP
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