The cross-correlation of continuous $f,g$ is:
$(f \star g)(\tau)=\int_{-\infty}^{\infty}f^*(t)g(t+\tau)dt$
where * is the complex conjugate.
Why is there the complex conjugate?
2026-03-31 12:11:37.1774959097
Why does cross-correlation involve the complex conjugate?
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