Chapter 8 Communication Systems 58.1 Complex Exponential and Sinusoidal Amplitude Modulation 1. c(o=el 2. c(t)=cos@ t t Envelope 44 Chapter 8 Communication Systems §8.1 Complex Exponential and Sinusoidal Amplitude Modulation 1. ( ) c j t c t e  = 2. cos ( ) c c t t =  t x(t) t y(t) Envelope