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Unformatted text preview: using a collection or ensemble of sample observations of the random process – Such averages are called ensemble averages Dr. Bülent Yılmaz Bü BME402: Biomedical Signal Processing-II Processing- 8 4 Ensemble averages
• M observations of
random process x as functions of time
– x1(t), x2(t), x3(t), …, xM(t) – Estimate the mean of the process at t1 – µx(t1)= lim (1/M) Σ xk(t1)
Flash visual ERP 10 realizations
Dr. Bülent Yılmaz Bü BME402: Biomedical Signal Processing-II Processing9 Ensemble averages
• Autocorrelation function ACF
– shows how the values of a signal at a particular instant of time are statistically related to (or have characteristics in common) values of the same common) signal at another time instant – Φxx (t1,t1+τ)=lim (1/M) )=lim Σ...
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This note was uploaded on 06/11/2012 for the course ENG 411 taught by Professor Cca during the Spring '12 term at Istanbul Universitesi.
- Spring '12