Communications transmission engineering. A digital type of phase modulation that uses an analogue carrier and a digital modulation signal with constant frequency and constant amplitude. When the modulation signal changes from the digital 0 to the digital 1 the phase of the carrier is abruptly changed for example from 0° to 180 ° and vice versa. There are several types of phase shift keying which use different numbers of phase positions for the signal coding.

The most commonly used are: Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), Pi/4-Quadrature Phase Shift Keying (Pi/4 QPSK), and Offset Quadrature Phase Shift Keying (OQPSK).

Belongs to:

Related to:

- amplitude modulation
- frequency modulation
- pulse modulation
- phase modulation
- pulse code modulation
- carrier wave
- Direct Sequence Spread Spectrum
- Coded Orthogonal Frequency Division Multiplex
- Fast Frequency Shift Keying
- Frequency Hopping Spread Spectrum
- Orthogonal Frequency Division Multiplex
- Orthogonal Complex Quadrature Phase Shift Keying
- Packet Binary Convolution Coding
- Scalable Orthogonal Frequency Division Multiplex Access

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