ANGLE MODULATION

1
ANGLE MODULATION
Generalized angle and instantaneous frequency
PHASE MODULATION (PM) , FREQUENCY MODULATION (FM)
Consider the generalized angle
?FM(t)
?PM(t)
PHASE MODULATOR
m(t)
FREQUENCY MODULATOR
m(t)
We can generate FM signal using a PM system, and
PM signal using a FM system.
2
EXAMPLE Consider m(t)- a square wave- as
shown. The FM wave for this m(t) is shown below.
m(t)
0
T
2T