Quadrature PSK (QPSK) code[1]
Description
Also known as quadriphase PSK, 4-PSK, or 4-QAM. Quaternary encoding into a constellation of four points distributed equidistantly on a circle. For the case of \(\pi/4\)-QPSK, the constellation is \(\{e^{\pm i\frac{\pi}{4}},e^{\pm i\frac{3\pi}{4}}\}\).
Realizations
Japanese and North American digital cellular and personal systems [2].Telephone-line modems: 1962 Bell 201 and international standard V.24 [3].
Parents
- Phase-shift keying (PSK) code — QPSK is also known as 4-PSK.
- Biorthogonal spherical code — QPSK code is equivalent to the biorthogonal spherical code for \(n=2\).
References
- [1]
- P. A. Baker, “Phase-modulation data sets for serial transmission at 2,000 and 2,400 bits per second”, Transactions of the American Institute of Electrical Engineers, Part I: Communication and Electronics 81, 166 (1962) DOI
- [2]
- K. Feher, “Modems for emerging digital cellular-mobile radio system”, IEEE Transactions on Vehicular Technology 40, 355 (1991) DOI
- [3]
- International Telecommunication Union-T, Recommendation V.24: List of definitions for interchange circuits between data terminal equipment (DTE) and data circuit-terminating equipment (DCE), 1988
Page edit log
- Victor V. Albert (2022-11-07) — most recent
Cite as:
“Quadrature PSK (QPSK) code”, The Error Correction Zoo (V. V. Albert & P. Faist, eds.), 2022. https://errorcorrectionzoo.org/c/qpsk