FSK

The Frequency Shift Keying (FSK) modulation scheme is a frequency modulation system used primarily for digital signals. In FSK, the digital information is transmitted through discrete frequency changes of a carrier signal. This method is typically used in radio and wired communication systems due to its resistance to interference and noise. The two binary states, 0 and 1, are represented by two different frequencies, making it a simple and effective modulation technique. FSK is commonly used in applications such as fax machines, wireless LANs, and RFID.