Modulation Representing digital signals as analog waveforms ° Baseband signals Signals whose frequency components are concentrated around zero ● Passband signals Signals whose frequency components are centered at some frequency fc away from zero Baseband signals can be converted to passband signals through modulation Multiplication by a sinusoid with frequency fcModulation • Representing digital signals as analog waveforms • Baseband signals – Signals whose frequency components are concentrated around zero • Passband signals – Signals whose frequency components are centered at some frequency fc away from zero • Baseband signals can be converted to passband signals through modulation – Multiplication by a sinusoid with frequency fc Eytan Modiano Slide 2