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Description: Thus PSK systems require less transmitted power for a given probability of
error than ASK or FSK systems.
Synchronous detection of PSK signals is required,due to the absense of a large
carrier component.Carrier recovery is there for emore complex and expensive.
DPSK systems are often a good compromise,offering simpler circuit ryata
small performance cost.The PSD of a PSK waveform is centered around!c,
and has an identical shape to that of the double side band modulating spectral
density
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