典型确定性信号 1. f(t)=Ke 2. f(e=Asin(ot +0) t<0 3.f() 14sin(o+O)ea,t≥0 4.f()=ke",=a+jo,t∈(-0,+∞) Ke cos at jKe sin at 99 典型确定性信号 • 1. • 2. • 3. • 4. ( ) t f t Ke = f t A t ( ) = + sin(  ) ( ) ( ) 0 , 0 sin , 0 t t f t A t e t    −   =  +   ( ) , , , ( ) st f t Ke s j t = = +  − +   cos sin t t Ke t jKe t   = +  