The basic characteristics of frequency shift keying (FSK) mainly include the following aspects:
Strong anti-interference ability: FSK transmits information by changing the frequency of the carrier. This change has strong resistance to channel noise and attenuation, so it has been widely used in medium and low-speed data transmission.
Easy to implement: FSK technology is relatively simple, and the modulation and demodulation process is relatively easy to implement.
Moderate spectrum utilization: FSK can transmit information within a limited bandwidth, but its spectrum utilization is lower than other modulation methods such as PSK.
Widely used: FSK is widely used in wireless communication, data transmission and other fields, such as radio broadcasting, remote control, etc.
Working principle FSK transmits digital information by changing the frequency of the carrier. Specifically, FSK uses the baseband pulse signal to control the frequency of the analog carrier signal so that it changes with the change of the baseband pulse. Two frequencies f1 and f2 are usually used to represent binary "0" and "1" respectively.
Historical background and application scenarios
FSK is an early modulation method used in information transmission. It is widely used in medium and low-speed data transmission because it is easy to implement and has good noise and attenuation resistance.
