ATIS Telecom Glossary
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quadrature phase-shift keying (QPSK)

Phase-shift keying in which four different phase angles are used. Note: In QPSK, the four angles are usually out of phase by 90°. Synonyms quadriphase, quaternary phase-shift keying.

quadrature phase-shift keying image

 

 

 

 

 

 

 

 

 

 



 
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