modulation

amplitude modulation

amplitude modulayion is the technique where the amlitude of carrier wave varies according to amplitude of message signal , while the phase and frequency of carrier remains unvhnage

modulation

the process of converting one signal form to the other

two tyoes of modulatuon

analog data modulation technique

digital data modulation tecn=chnique

analog data modulation examp

amplitude modulation , frequency modulation and phase modulation

digital data modulation techniques

ASK , FSK , PSK … amplitude shift key , fre..ect

used of amplitude modulation

Short wave transmisiion , medium wave transmission , radio transmission

frequency modulatioon

the frrequency of the carrier wave is varied according to the amplitude of modulation signal , keeping phase and amplitude constant.

frequency modulation used in

radio transmission

phase modulation

the pase of carrier wave is varied according to the instanoeus ampliitude of modulating signal frequency and amplitude is constnt .

phase mosulation used in

blue tooth communication and , sattelliite communication