Frequency Shift Keying

Frequency Shift Keying (FSK) is a digital modulation technique where information is transmitted by changing the frequency of a carrier wave. Essentially, different digital signals (like 0s and 1s) are represented by distinct frequencies. When sending data, the transmitter switches between these frequencies to encode the information. At the receiver's end, the device detects which frequency is present to interpret the original data. FSK is commonly used in radio, telephone, and data communication systems due to its reliability and resistance to noise.