ASK Modulation
In ASK modulation, a carrier wave (usually a sinusoidal wave) is modified in accordance with the digital message signal. The amplitude of the carrier signal is changed between two predefined values i.e. 0 and 1 to represent binary data.
The carrier wave is represented by continuous signal. The carrier’s amplitude changes between two levels, particularly ‘0’ and ‘1’. When the input data is ‘0’, the amplitude might be lower, and when the input data is ‘1’, the amplitude could be higher. The changes in amplitude effects the carrier signal in accordance with the digital signal. This modulation technique is simple but can be susceptible to noise and interference, which can affect the accuracy of the received data.
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.