$$P_k+j{问}_k＝G（V_k{e}^{j{\theta }_{V_k}}）（\stackrel{¯}{{我}_k{e}^{j{\theta }_{{我}_k}}}），$$

$$V_k{e}^{j{\theta }_{V_k}}＝\frac{2}{T}{\displaystyle {\int }_{t-T}^{t}V（t）罪（2\pi kFt）dt}+j\frac{2}{T}{\displaystyle {\int }_{t-T}^{t}V（t）\mathrm{因为}（2\pi kFt）dt}$$

$${我}_k{e}^{j{\theta }_{{我}_k}}＝\frac{2}{T}{\displaystyle {\int }_{t-T}^t我（t）罪（2\pi kFt）dt}+j\frac{2}{T}{\displaystyle {\int }_{t-T}^t我（t）\mathrm{因为}（2\pi kFt）dt}．$$

$$P＝\underset{k＝0}{\overset{n}{{\displaystyle \sum }}}{P}_k$$

$$问＝\underset{k＝1}{\overset{n}{{\displaystyle \sum }}}{问}_k．$$