Monday, 24 April 2017

FIR FILTER DESIGN USING FREQUENCY SAMPLING METHOD

    The aim of the experiment was to design digital filter using frequency sampling method. The magnitude and phase spectrum were plotted for LPF and HPF. 
    It was observed that the phase plot is similar. Also, if the order of LPF and HPF are same, then the phase plot for both the filters is also same. The observed and calculated values of As and Ap were verified.

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10 comments:

  1. Unknown24 April 2017 at 09:35

    How do we design the filter using this method?

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    Replies
    1. Akash Bangera25 April 2017 at 18:30

      In this method the given frequency response is sampled as a set of equally sampled frequencies to obtain N samples. The continuous frequency response Hd(w) at N points essentially gives us the N-Point DFT of Hd(2pnk/N).Thus by using IDFT formula, the filter co-efficients can be calculated. Increasing the number of samples can possibly reduce the error. Thus FIR design can be designed using FSM method.

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    2. Unknown25 April 2017 at 22:45

      concise description.Well written.

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  2. Unknown25 April 2017 at 22:45

    precisely wriiten

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  3. Unknown25 April 2017 at 22:46

    This method requires less computation than windowing method.

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  4. Unknown26 April 2017 at 12:11

    Good explanation

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  5. Unknown28 April 2017 at 05:25

    Well written

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  6. Ankesh Patil28 April 2017 at 06:14

    FSM method is more efficient

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  7. Ankesh Patil28 April 2017 at 06:15

    We used TMS320F2833

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  8. Keshvi Srivastava28 April 2017 at 06:38

    Frequency sampling realization is computationally more efficient than direct form realization

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