Źródło TeX:

G\left(b,\xi\right)=\int_{-\infty}^{+\infty}{x\left(t\right)\overline{g_\alpha\left(t-\tau\right)} e^{-j\xi \ t}dt}=\frac{1}{2\pi\alpha}\int_{-\infty}^{+\infty}{f\left(t\right) e^\frac{-(t-\tau)^2}{4\alpha}e^{-j\xi \ t}dt}