Testbench for IIR filter

Question

Jim 2011-9-28

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https://ww2.mathworks.cn/matlabcentral/answers/16942-testbench-for-iir-filter

Hi,

I need to write a testbench(a function)in Matlab that verifies the specified amplitude- and phase transfer functions of calculated IIR filter.

I have to use this testbench(function)in the design of Bandpass and lowpass IIR filters

Can anyone suggest me something about this

Thanks in advance

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Honglei Chen 2011-9-28

Hi Vivek,

What's the difference between this question and your earlier question linked below?

http://www.mathworks.com/matlabcentral/answers/16853-how-to-create-a-test-bench-waveform-for-the-working-of-band-pass-and-low-pass-filter

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Answer 1

Wayne King 2011-9-28

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https://ww2.mathworks.cn/matlabcentral/answers/16942-testbench-for-iir-filter#answer_22829

在 MATLAB Online 中打开

Hi Vivek, I think Honglei commented on this in another post. MATLAB has a number of filter analysis capabilities built in. For example, design a Butterworth lowpass filter for data sampled at 1 kHz.

    d = fdesign.lowpass('N,F3dB',10,100,1e3);
    Hd = design(d,'butter');
    % Get the frequency response in 1-Hz increments around the 
    % unit circle
    [H,W] = freqz(Hd,1e3,1e3,'whole');