卷積、互相關、自相關可視化比較

g ( τ ) g(\tau ) g(τ) is an even function， ( g ( − τ ) = g ( τ ) ) (g(-\tau)=g(\tau) ) (g(−τ)=g(τ)), so convolution is equivalent to correlation. convolution ( f ∗ g ) ( t ) = ∫ − ∞ ∞ f ( τ ) g ( t −

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