Glossary Definition for qpsk

Glossary Term: qpsk 

Definition


QPSK Symbol Constellation
Quadrature Phase Shift Keying (QPSK) is a form of Phase Shift Keying in which two bits are modulated at once, selecting one of four possible carrier phase shifts (0, 90, 180, or 270 degrees). QPSK allows the signal to carry twice as much information as ordinary PSK using the same bandwidth. QPSK is used for satellite transmission of MPEG2 video, cable modems, videoconferencing, cellular phone systems, and other forms of digital communication over an RF carrier.

See our QPSK tutorial: QPSK Modulation Demystified.

Synonyms
  • Quaternary Phase Shift Keying
  • 4-PSK
  • Quadrature Phase Shift Keying
  • Quadriphase Phase Shift Keying
Keywords

QPSK, Quaternary Phase Shift Keying, 4-PSK, Quadrature Phase Shift Keying, Quadriphase Phase Shift Keying

Find a term alphabetically:
0-9ABCDEFGHIJKLMNOPQRSTUVWXYZ

Comment on This Term (Corrections, Suggestions, etc.)

Suggest Another Term We Should Add