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binary phase shift keying (BPSK)

The BPSK method, BinaryPhase Shift Keying, is a phase shift keying with two phase states, hence the abbreviation 2-PSK. It is the simplest form of phase shift keying, in which the carrier frequency

can assume two phase positions 0° and 180°. Each time the state of the digital signal changes, the phase of the carrier signal is rotated by 180°. For example, the Hi level is always assigned the phase position 0° and the ''Lo level that of 180°. The receiver evaluates the phase shifts and can determine from them whether it is a Lo or a Hi state. A total of 256 (2exp8) codewords

can be generated with an 8BPSK keying.

Two-phase shift keying (BPSK)

Two-phase shift keying (BPSK)

Two-phase shift keying is used for data transmission in cable distribution networks. It is not as effective as four-phase shift ke ying, quadrature phase shift ke ying (QPSK), or quadrature amplitude modulation (64QAM), but is less susceptible to noise. In addition to the variants mentioned, there are several differential keying methods such as Differential Binary Phase Shift Key ing (DBPSK) or Differential Quaternary Phase Shift Keying (DQPSK).

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Englisch: binary phase shift keying - BPSK
Updated at: 09.11.2011
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