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  1. #1
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    design filter with transfer function

    Hi
    I want to design a FIR filter with length of 48, also I have the coefficients of num and den.
    the length of num and den is 25.
    I wanna know is it possible to design the filter with this amount of information?
    your help woulb be appreciated.

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  2. #2
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    Re: design filter with transfer function

    Hi
    You are given an IIR filter and now you have to approximate the given IIR filter with an FIR one.



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    Re: design filter with transfer function

    Could you pleas describe more? I can't understand what should I do exactly



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  4. #4
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    Re: design filter with transfer function

    Hi
    There are numerous ways to design a FIR filter. One of the way is Windowing method.
    In this method you suitably truncate the impulse response values. You may use this method to approximate the given IIR filter.



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    Re: design filter with transfer function

    unfortunatly I didn't find a matlab code for designing a FIR filter which just needs transfer function and length of filter. I'm so confused :( could you pleas tell me which code is suitable for my design?



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    Re: design filter with transfer function

    Hi
    Sorry for late reply. Actually I was much busy.

    You may use impulse function in Matlab to estimate impulse response of an IIR system.



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  7. #7
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    Re: design filter with transfer function

    @ MHanif,

    say there was a 10000 samples input data to a LTI.. After knowing the IIR filter coefficients, i mean the transfer funtion coefficients, how to find the output?? randomly pick a length for the IIR filter coefficients while generating the Impulse response with the help of the coefficients is it what u meant?? but in real world the IIR is infinite rite?? how does it go about this.??



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