enbw

$${\displaystyle {\int }_{-1/2}^{1/2}{\left|W(f)\right|}^2}df={\displaystyle \underset{n}{\sum }{\left|w(n)\right|}^2}。$$

$${\left|W(0)\right|}^2={\left|{\displaystyle \underset{n}{\sum }w}(n)\right|}^2。$$

$$\frac{{\displaystyle {\int }_{-1/2}^{1/2}{\left|W(f)\right|}^2}df}{{\left|W(0)\right|}^2}=\frac{{\displaystyle \underset{n}{\sum }{\left|w(n)\right|}^2}}{{\left|{\displaystyle \underset{n}{\sum }w}(n)\right|}^2}。$$

$$\text{ENBW}=f_{\mathrm{年代}}\frac{{\displaystyle \underset{n}{\sum }{\left|w(n)\right|}^2}}{{\left|{\displaystyle \underset{n}{\sum }w}(n)\right|}^2}。$$

$$\text{ENBW}=N\frac{{\displaystyle \underset{n}{\sum }{\left|w(n)\right|}^2}}{{\left|{\displaystyle \underset{n}{\sum }w}(n)\right|}^2}。$$