Questions
1
Which of the following defines the weighted approximation error?
Answer:W(ω)[Hdr(ω)-Hr(ω)]
2
The error function E(ω) does not alternate in sign between two successive extremal frequencies.
Answer:False
3
At most how many extremal frequencies can be there in the error function of ideal low pass filter?
Answer:L+3
4
The filter designs that contain more than L+2 alternations are called as ______________
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?
Answer: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.
Answer:False
7
What is the value of JTYPE in the Parks-McClellan program for a Hilbert transformer?
Answer:3
8
In Parks-McClellan program, the grid density for interpolating the error function is denoted by which of the following functions?
Answer:-LGRID
9
In Parks-McClellan program, an array of maximum size 10 that specifies the desired frequency response in each band is denoted by?
Answer:FX
10
If δ1 represents the ripple in the pass band for a chebyshev filter, then which of the following conditions is true?
Answer:1-δ1 ≤ Hr(ω) ≤ 1+δ1; |ω|≤ωP
