Amplitude Shift Keying
Amplitude Shift Keying (ASK) is a digital modulation technique . It transmits the digital information by varying the amplitude of a carrier signal. In ASK, a high-amplitude carrier signal is used to represent a binary ‘1,’ and a low-amplitude carrier signal represents a binary ‘0.’
It involves the superimposition of a carrier signal and a digital message signal. The carrier signal is often a high-frequency sinusoidal waveform, which serves as the carrier for the digital information. The binary message signal, consisting of ‘1’s and ‘0’s, is used to control the amplitude of the carrier signal. The resultant signal formed after the superimposition of message and carrier is transmitted over the communication channel.
Circuit diagram of ASK
Amplitude Shift Keying
In digital communication, different modulation techniques are used to transmit data or message to receiver over a communication channel . One such technique is Amplitude Shift Keying (ASK). It is a modulation technique that alters the amplitude of a carrier signal to transmit the information over channel. It is a modulation scheme having wide range of application in real world which includes radio, television, and digital data transmission.