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Testbench for IIR filter

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Jim
Jim on 28 Sep 2011
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
  1 Comment
Honglei Chen
Honglei Chen on 28 Sep 2011
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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Answers (1)

Wayne King
Wayne King on 28 Sep 2011
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');
Get the frequency response at 100-Hz
H(101)
  1 Comment
Wayne King
Wayne King on 28 Sep 2011
Additionally, if you have the DSP System Toolbox, you can use measure()
measure(Hd)

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