BFSK, or Binary Frequency Shift Keying, is a digital modulation scheme used in telecommunications and signal processing. It is a form of frequency shift keying (FSK), where the frequency of the carrier signal is varied to represent binary data.
In BFSK, there are two frequency values associated with the binary states, typically denoted as a "0" and a "1". The carrier signal's frequency is switched between these two frequencies based on the binary data being transmitted. If the binary data represents a "0", the carrier frequency is set to the lower frequency, and if it represents a "1", the carrier frequency is set to the higher frequency. This frequency switching occurs at a rate known as the symbol rate.
BFSK is particularly useful in digital communication systems due to its simplicity and resilience to noise. It allows for efficient transmission of binary information over long distances using modulation techniques that are relatively simple to implement.
To demodulate a BFSK signal, a receiver must detect the frequency shifts in the carrier signal and convert them back into binary data. This is typically achieved through filters, phase-locked loops, and discriminator circuits.
Overall, BFSK plays a crucial role in various communication applications, including data transmission over wired and wireless systems, radio broadcasting, and digital audio broadcasting.
