Chapter 8 Communication Systems Modulation: The general process of embedding an information bearing signal into a second signal Demodulation: Extracting the information-bearing signal. Amplitude Modulation (AM) Modulation Frequency modulation (FM) Phase Modulation(PM) Modulating Modulated Signal x y()=x()x() Signal Carrier C Signal Amplitude modulation3 Chapter 8 Communication Systems Modulation : The general process of embedding an information -bearing signal into a second signal. Demodulation : Extracting the information-bearing signal. Modulation : Amplitude Modulation (AM) Frequency Modulation (FM) Phase Modulation (PM) Modulating Signal Carrier Signal Modulated Signal x(t) y(t) = x(t)c(t) c(t) Amplitude Modulation