BSPII-ch3-filtering-time-2008

# Blent ylmaz b hanning filter hw1412e jwe j2w

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Unformatted text preview: sion, sample and a few past input samples Filter is a set of tap weights of the delay stages No poles except at z=0 – Inherently stable – Symmetric or antisymmetric tap weights BME402: Biomedical Signal Processing-II Processing15 • Linear phase Dr. Bülent Yılmaz Bü Hanning Filter • H(w)=(1/4)[1+2e-jw+e-j2w] • H(w)=(1/4)[{2+2cos(w)}e-jw] Dr. Bülent Yılmaz Bü BME402: Biomedical Signal Processing-II Processing- 16 8 Hanning filter Magnitude response = |(1/2){1+cos(w)}| |(1/2){1+cos(w)}| - Lowpass filter with linear phase - Magnitude and phase response assist in undestanding the effect of the filter on the frequency components of the signal and noise Dr. Bülent Yılmaz Bü Phase response = -w BME402: Biomedical Signal Processing-II Processing- 17 Moving average filter (8-point) H(w) = (1/8) Σ exp(-jwk) = (1/8) [1+ exp(-j4w) {1+2cosw+2cos2w+2cos3w}] Dr. Bülent Yılmaz Bü BME402: Biomedical Signal Processing-II Processing18 9 Illustration of application: Filtering with 8-point MA Dr. Bülent Yılmaz Bü BME402: Biomedical Signal Processing-II Processing- 19 Problem • Develop a time-domain technique to remove base-line drift in the ECG signal Dr. Bülent Yılmaz Bü BME402: Biomedical...
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