Offset Quadrature Phase Shift Keying

  • Staggered Quarature Phase Shift Keying
German: Offset-Quadratur-Phasenmodulation
Japanese: オフセット四位相偏移変調

Communications engineering. A special form of Quadrature Phase Shift Keying (QPSK). It is used in the 2.4 GHz range, for example with Zigbee.

OQPSK (as QPSK does) divides the data stream into two sub-streams that modulate a sine- and a cosine-carrier wave. But with OQPSK these two waves are transmitted with an offset which limits the phase jump to a maximum of 90°. This has advantages for the transmission technique.

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