Chapter 1 Signals and systems 5 1.3 Exponential and Sinusoidal Signals 复指数信号和正弦信号 5 1.3. 1 Continuous-Time Complex Exponential and sinusoidal signals e 0O<t<+0 1. Real Exponential signals x()=Cea Decaying exponential. when 0<0 Growing Exponential,when a Is rea a>0 Figure 1.19 2006 Fall2006 Fall Chapter 1 Signals and Systems § 1.3 Exponential and Sinusoidal Signals 复指数信号和正弦信号 § 1.3.1 Continuous-Time Complex Exponential and Sinusoidal Signals ( ) st x t = Ce −   t  + 1. Real Exponential Signals ( ) at x t = Ce a is real Decaying Exponential, when α<0 Growing Exponential, when α>0 Figure 1.19