IIR bands stop filter

I want to dsign IIr filter band stop with the following conditions:

0.8<= | Hd(exp(jw)) |<=1, 0<=w<=0.2pi 0.7pi<=w<=pi

| Hd(exp(jw)) | <=0.2, 0.3pi<=w<=0.6pi

Answer 1

[Swetha Polemoni]

Hi

You can use designfilt to design filters in Matlab. Have a look at Name-Value Pair Arguments such as 'PassbandFrequency', 'StopbandFrequency', 'StopbandAttenuation' to get the filter with desired specifications.