Pulse Amplitude Modulation (PAM)

1
Pulse Amplitude Modulation (PAM)
VPAM must directly proportional with VM
2
Signal shown of PAM Signal
In the noise aspect, this type of signal is
EASILY EFFECTED by noise This is type of flat-top
sampling signal
3
Construction of PAM signal
Time Domain
Frequency Domain
4
Sampling Methods in PAM
Ideal and natural sampling signal can eliminate
noise Ideal sampling signal is difficult to
generate
5
Detection of PAM Sample Signal
fo for the LPF must within the range of fm lt fo lt
fs - fm
fs 2fm but usually fs gt 2fm because to have
GUARDBAND fm fs / 2 1 / 2T ms(t) VPAM
6
Generation and Detection of PAM
Generation of PAM
Detection of PAM