OQPSKOffset Quadrature Phase Shift Keying
OQPSKOrthogonal Quadrature Phase-Shift Keying
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References in periodicals archive ?
The total bandwidth is 20 MHz, the modulation mode is OQPSK, and the penetration loss per wall is set to 71.5 dB.
The noncoherent OQPSK demodulator functions as a phase detector.
OQPSK modulator - The input data are composed of 704 chips, and the frequency is 2 MHz.
The resulting p(t) of Equation 6 is a Nyquist pulse whose spectral sidelobes are quite small, and which gives rise to only 10 percent RMS amplitude ripple when used in an OQPSK signal.
Thus the spectral-efficient modulation types QPSK, OQPSK and 8PSK, which are widely used in modern cellular communication systems such as cdma2000 and TETRA emerged.
This band distances from 2.4 to 2.483 GHz and offers 16 channels with a channel spacing of 5 MHz, operating at a raw data rate of 250 kb/s, using the offset quadrature phase shift key (OQPSK) modulation technique.
[7] The spectral degradation from hard-limiting of a non-constant carrier envelope offset quadriphase shift keyed (OQPSK) type data signal has also been the subject of some investigation.
This article explores the way of satisfactory quality of offset quadrature phase shift keyed (OQPSK) signal transmission even at unacceptable small SNR for conventional systems.
This article offers closed-form expressions for FOBP for classical binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK) (including offset QPSK (OQPSK)) and minimum-shift keying (MSK) modulation.
Four different modulation formats were chosen: QPSK, offset QPSK (OQPSK), [Pi]/4 differential QPSK and 16QAM.
The power spectral sidelobe regrowth of an offset quadriphase-shift keyed (OQPSK) data signal at the output of a soft saturating BF power amplifier has been analyzed.[1,2] This article describes the technique and performance of a simple, adaptive predistorter that precedes the power amplifier and reduces the spectral sidelobes at the power amplifier output without degradation of the intended signal.