Question 7
Marks : +2 | -2
Pass Ratio : 100%
The error function E(ω) should exhibit at least how many extremal frequencies in S?
Explanation: According to Alternation theorem, a necessary and sufficient condition for P(ω) to be unique, best weighted chebyshev approximation, is that the error function E(ω) must exhibit at least L+2 extremal frequencies in S.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
Remez exchange algorithm is an iterative algorithm used in error approximation.
Explanation: Initially, we neither know the set of external frequencies nor the parameters. To solve for the parameters, we use an iterative algorithm called the Remez exchange algorithm, in which we begin by guessing at the set of extremal frequencies.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
If δ1 represents the ripple in the pass band for a chebyshev filter, then which of the following conditions is true?
Explanation: Let us consider the design of a low pass filter with the pass band edge frequency ωP and the ripple in the pass band is δ1, then from the general specifications of the chebyshev filter, in the pass band the filter frequency response should satisfy the condition