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BSPII-ch3-filtering-intro-2008

Blent ylmaz b bme402 biomedical signal processing ii

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Unformatted text preview: abilities of occurences of all possible values of a random variable Dr. Bülent Yılmaz Bü BME402: Biomedical Signal Processing-II Processing- 6 3 Random process • x: a random process with pdf px(x) – Mean: µx= E[x]= ∫x px(x) dx Mean: • DC component of the signal – Mean-squared (MS): E[x2]=∫x2 px(x) dx Mean• Average power – Variance: σx2= E[(x-µx)2]= ∫(x-µx)2 px(x) dx Variance: E[(x(x– SNR: signal to noise ratio = average power of the signal to that of the noise • PCG may be represented as a random process Dr. Bülent Yılmaz Bü BME402: Biomedical Signal Processing-II Processing7 Ensemble averages • When the PDFs of random processes of concern are not known – Approximate the statistical expectation operation by averages computed...
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