What is Amplitude Shift Keying and Frequency Shift Keying?

Amplitude Shift keying as the name suggests is a type of modulation where the amplitude of the carrier wave is the only parameter to be changed by the signal. It is a digital version of analog amplitude modulation. When a binary 1 appears, a burst of radiofrequency is conveyed whereas at 0 it stops.

Frequency Shift keying as the name suggests is a type of modulation where the frequency of the carrier wave is the only parameter to be changed by the signal. It is a digital version of analog amplitude modulation. The digital data which is encoded into binary language is conveyed with the help of one of two frequencies. In this, 1 is transmitted by one frequency whereas 0 is transmitted by another frequency.