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what can be understood from the magnitude response plot of a fitler

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Stefan
Stefan 2014-2-4
关闭： MATLAB Answer Bot 2021-8-20
Hello,
I am not familiar with the filters so want to know of what can be understood or analysed from the maginitude response of a filter.
I want to know of what can be known from this maginitude response of the desinged lowpass filter
Fc = 3; %Cutoff frequency
N = 11; % FIR filter order
Hf = fdesign.lowpass('N,Fc',N,Fc,100);%sampling frequency of 100Hz
Hd=design(Hf);
fvtool(Hd);
The response is
Thanks.

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