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Design linear phase FIR low pass filter of length T and cut of frequency 1 rad/sec using hamming window.
1 Answer
written 6.5 years ago by |
Step-1: Identify the specification of filter
N=7∝=3ωc=−1<ω<1
Window Type: Hamming
Step-2: Calculate the Inverse Fourier Transform of H(ω)
hd(n)=12π∫−ωc(ωcHd(ω)ejωndω
=12π∫1−1e−j3ωejωnd
=12π∫1−1ej(n−3)ωdω
=12π[ej(n−3)ω)(j(n−3))]1−1
=1(π(n−3))[(ej(n−3)−e−j(n−3)))2j]
hd(n)=sin(n−3)(π(n−3))
hd(0)=0.014=hd(6) {by linear phase property}
hd(1)=0.144=hd(5) …