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. 2009 Jul 8;2009:549419. doi: 10.1155/2009/549419

Figure 2.

Figure 2

A block diagram of an adaptive filter. It is obvious that EEG(n) = w(n)EOG(n) + CEEG(n). Adaption filtering is trying to adjust w^(n) as close as possible to w(n), so our goal is to approach clean EEG as much as possible. e(n)=EEG(n)-w^(n)EOG(n).   It stands that e(n) → 0 when w^(n)→w(n) .