Frequency Shift Keying(FSK) :
The short form of Frequency Shift Keying is referred as FSK. It is a digital modulation technique which shifts the frequency of the carrier with respect to binary data signal. The FSK modulation technique uses two different carrier frequencies to represent binary 1 and binary 0.Advantages of FSK :
- It has lower probability of error
- It provides high SNR (Signal to Noise Ratio).
- It has higher immunity to noise due to constant envelope. Hence it is robust against variation in attenuation through channel.
- FSK transmitter and FSK receiver implementations are simple for low data rate application.
Disadvantages of FSK :
- It uses larger bandwidth compare to other modulation techniques such as ASK and PSK. Hence it is not bandwidth efficient.
- The BER (Bit Error Rate) performance in AWGN channel is worse compare to PSK modulation.
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