lim vt g(t=0 g0|=2|Go= (t)dt 2π 窗口傅立叶变换的性能分析: 海森堡测不准原理 计算D2×D2 DAD tg(t)dtx oG(o d 2兀 ∫ tg( dtx厂2mlg(0)dt(xg()=joG(o) 2π + el tg()g(t)dtl tdg(t) ∞ tg(t) g(tdt窗口傅立叶变换的性能分析： − 计算Dt 2×D 2：     =    + − +   | g d | G | d 2 - 2 2 2 t ( ) 2 1 D D t (t) | t 2 '(t) | t ( { '(t)} j ( )) 2 1 t (t) t 2 2   =    =    + − + − | g | d | g d g G 2 | t g(t) g'(t) d t |  + −  2 2 t (t) 2 1 | dg |  + − = 2 2 - 2 (t) t 2 1 t (t) | 2 1  + − + = g  − g d 4 1 = 海森堡测不准原理 t (t) 0 |t| = → + lim g || ( ) || | (t) | t 1 2 1 || (t) ||2 2 2  = =  =  + − g G g d