XPSK: A NEW CROSS-CORRELATED PHASE-SHIFT KEYING MODULATION TECHNIQUE.

Shuzo Kato, Kamilo Feher

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

A new modulation technique, cross-correlated phase-shift keying (XPSK) is introduced. XPSK is a band-limited offset QPSK modulation technique which has an almost constant envelope. In XPSK modulators, a controlled amount of cross correlation between the in-phase (I) and quadrature (Q) channels is introduced. I and Q cross correlation reduce the envelope fluctuation of the intersymbol-interference and jitter-free QQPSK (IJF-QQPSK) modulation scheme, introduced by K. Feher et al. from 3 db to approximately 0db, thus further improving the performance of IJF-OQPSK QQPSK systems in nonlinear radio systems. It is shown that the baseband signal of the modulator, the P//e equals f(E//b/N//o performance, and the spectral characteristics of nonlinearly amplified (hard-limited or saturated) radio systems of XPSK and tamed frequency modems (TFM) are practically the same.

Original languageEnglish
Pages (from-to)701-707
Number of pages7
JournalIEEE Transactions on Communications
VolumeCOM-31
Issue number5
Publication statusPublished - 1983 May

ASJC Scopus subject areas

  • Engineering(all)

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