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Quiz: DSP - Filters

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Number of Questions: 40

Question: 16 -

To reduce side lobes, in which region of the filter the frequency specifications have to be optimized?

Options:

  1. Stop band

  2. Transition band

  3. Pass band

  4. None of the mentioned

    5. Answer:

    Transition band
    Solution not available.

Question: 17 -

Which among the following represent/s the characteristic/s of an ideal filter?

Options:

  1. Constant gain in passband

  2. Zero gain in stop band

  3. All of the above

  4. Linear Phase Response

    5. Answer:

    All of the above
    Solution not available.

Question: 18 -

FIR filters ________

A. are non-recursive
B. do not adopt any feedback
C. are recursive
D. use feedback

Options:

  1. C & D

  2. A & D

  3. B & C

  4. A & B

    5. Answer:

    A & B
    Solution not available.

Question: 19 -

Why is it desirable to optimize frequency response in the transition band of the filter?

Options:

  1. Increase main lobe

  2. Increase side lobe

  3. None of the mentioned

  4. Reduce side lobe

    5. Answer:

    Reduce side lobe
    Solution:

    To reduce side lobes, it is desirable to optimize the frequency specification in the transition band of the filter.

Question: 20 -

Which of the following condition should the unit sample response of a FIR filter satisfy to have a linear phase?

Options:

  1. None of the mentioned

  2. h(M-1-n) n=0,1,2…M-1

  3. -h(M-1-n) n=0,1,2…M-1

  4. ±h(M-1-n) n=0,1,2…M-1

    5. Answer:

    ±h(M-1-n) n=0,1,2…M-1
    Solution:

    An FIR filter has an linear phase if its unit sample response satisfies the condition
    h(n)= ±h(M-1-n) n=0,1,2…M-1.