Why in FSK the phase shift is allowed?

1. What is the phase shift in FSK?
2. What are limitations of FSK?
3. Why is FSK more immune to noise?
4. What is the purpose of FSK?
5. What is advantage of FSK compared to other techniques?
6. What is the purpose of frequency-shift keying?

What is the phase shift in FSK?

In noncoherent forms of FSK, the instantaneous frequency shifts between two discrete values termed the "mark" and "space" frequencies. In coherent forms of FSK, there is no phase discontinuity in the output signal.

What are limitations of FSK?

Drawbacks or disadvantages of FSK

Following are the 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.

Why is FSK more immune to noise?

Since FSK relies on frequency change and not amplitude change to indicate data states, an FSK receiver is inherently immune to amplitude noise.

What is the purpose of FSK?

Frequency-shift keying (FSK) is a method of transmitting digital signals using discrete signals. The two binary states -- logic 0 (low) and 1 (high) in a binary frequency-shift key mechanism -- are each represented by an analog waveform.

What is advantage of FSK compared to other techniques?

Advantages of FSK :

High data rate. It has better noise immunity than ASK method, so the probability of error-free reception of data is high. Easy to decode. Operate in virtually any wires available.

What is the purpose of frequency-shift keying?

Frequency-shift keying (FSK) allows digital information to be transmitted by changes or shifts in the frequency of a carrier signal, most commonly an analog carrier sine wave. There are two binary states in a signal, zero (0) and one (1), each of which is represented by an analog wave form.