Angle Modulation.....

Definition-

Angle modulation may be defined as the process in which the total phase angle of a carrier wave is varied in accordance with the instantaneous value of the modulating or message signal while keeping the amplitude of the carrier constant.

c(t) = Acos(wt + q)

where A = Amplitude of carrier
           w = carrier frequency
           q = some phase angle

Types of Angle Modulation-

1) Phase Modulation
2) Frequency Modulation

  Applications-


1) Radio broadcasting.
2) Two way mobile radio.
3) Microwave communication.
4) TV sound transmission.
5) Cellular radio.
6) Satellite communication.