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Is this PSK or FSK

Is this PSK or FSK
  1. What is the difference between PSK and FSK?
  2. Why PSK is preferred over FSK?
  3. Why is PSK preferred over ASK?

What is the difference between PSK and FSK?

FSK: Frequency Shift Keying: Message signal changes the carrier's frequency. C. PSK: Phase Shift Keying : Message signal changes the carrier's phase.

Why PSK is preferred over FSK?

Benefits or advantages of PSK

➨It carries data over RF signal more efficiently compare to other modulation types. Hence it is more power efficient modulation technique compare to ASK and FSK. ➨It is less susceptible to errors compare to ASK modulation and occupies same bandwidth as ASK.

Why is PSK preferred over ASK?

Unlike ASK signals, both PSK and FSK signals have a constant envelope. PSK and FSK are preferred to ASK signals for passband data transmission over nonlinear channel (amplitude nonlinearities) such as micorwave link and satellite channels.

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