二、傅氏变换 1定义 G(0)=∫f(x)e"=F[f(x 称为f(x)的傅氏变换 则 f(x)=o G(o)londo=F-G(a 2 称为G)的傅氏逆变换 显然 F-lFl(x)=f(x)二、傅氏变换 1.定义 [ ] ò ¥ - ¥ - G ( ) = f ( x ) e dx = F f ( x ) i x 记 w w 称为f(x)的傅氏变换 则 [ ] ò ¥ -¥ - = ( ) = ( ) 2 1 ( ) 1 w w w p w f x G e d F G i x 记 称为G(w)的傅氏逆变换 [ ( )] ( ) 1 F F f x = f x 显然 -