FSK (Frequency Shift Keying)

Frequency Shift Keying (FSK) is a method of transmitting digital data by changing the frequency of a continuous wave signal. In FSK, different digital bits are represented by distinct frequencies: for example, one frequency for a '0' and another for a '1'. When sending data, the transmitter switches between these frequencies to encode the information, and the receiver detects the changes in frequency to interpret the data. This technique is commonly used in radio communications, modems, and wireless systems because it’s resilient to signal noise and easy to distinguish between bits.