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differential binary phase shift keying (DBPSK)

Differential phase shift keying (DPSK) is a type of phase shift keying in which information is transmitted by changing the phase of the carrier frequency

. With DPSK keying, as with quadrature phase shift keying (QPSK), ambiguities can occur if the phase changes during transmission. For this reason, in Differential Binary Phase Shift Keying (DBPSK), the phase position is changed with the signal

and is not fixed.

DBPSK and DQPSK shift keying of the phase position of the carrier

DBPSK and DQPSK shift keying of the phase position of the carrier

For example, in DBPSK, a digital "1" is transmitted by rotating the phase position by 180°, and a binary "0" is transmitted by adding one of 0° to the current phase position. If two "ones" are transmitted one after the other, the first can have a phase angle of 0°, the second is in any case rotated by 180°.

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Englisch: differential binary phase shift keying - DBPSK
Updated at: 11.05.2011
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