Tuesday, 25 April 2017

FIR filter design using windowing method

The aim of the experiment was to design digital filter using windowing method and study the spectrum. The input parameters were passband attenuation(Ap), stopband attenuation(As), passband frequency(Fp), stopband frequency(Fs) and sampling frequency(F). The magnitude and phase spectrum for LPF and BPF using Hanning window were plotted. 
The observed and calculated values of Ap and As were compared. Thus, the values were verified. The phase spectrum was observed to be linear.
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8 comments:

  1. Unknown26 April 2017 at 00:39

    Due to its linear phase there was no distortion in the output.

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  2. Just DSPP Things26 April 2017 at 00:42

    There are side lobes present in frequency response due to discontinuity in the window function.

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  3. Unknown26 April 2017 at 07:45

    Different types of window functions have different values of stopband attenuation.

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  4. Unknown26 April 2017 at 10:22

    Hanning window gives a response

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  5. Amol26 April 2017 at 19:20

    As we go from rectangular window function to hanning window, we get smoother response which reduces Gibbs phenomenon.

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  6. Neha26 April 2017 at 20:26

    And the desired attenuation decides the window function that is to be selected

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  7. AjinkyaYadav28 April 2017 at 06:42

    blackman has highest stopband attenuation

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  8. Meet Patel28 April 2017 at 09:58

    While solving numericals rectangular window function saves a lot of time

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