Pulse modulation (pam)

1. Pulse Amplitude Modulation
(PAM)
V
PAM
must directly proportional with V
M

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 < fo < fs - fm
fs = 2fm but usually fs > 2fm because to have GUARDBAND
fm = fs / 2 = 1 / 2T
m
s
(t) = V
PAM

6. Generation and Detection of PAM
Generation of PAM
Detection of PAM

7. Generation and Detection of PAM
Generation of PAM
Detection of PAM