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

[Honglei Chen]

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

Answer 1

[Wayne King]

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)

[Wayne King]

Additionally, if you have the DSP System Toolbox, you can use measure()

measure(Hd)