EDN

Quadrature Phase Shift Key (QPSK)

Quadrature phase shift key is a one of the digital modulation schemes that use Phase-shift keying. One popular varient of QPSK is offset QPSK or OQPSK. What is the difference between these two ...
Electronic Design

QPSK Demodulator Is A Good Match For Low-Cost Modulator

This demodulator is suitable for the quadrature phase-shift keying (QPSK) modulator previously published by the same author, "Novel Low-Cost QPSK Modulator Needs No Adjustments" (electronic design, ...
Electronic Design

Novel Low-Cost QPSK Modulator Needs No Adjustments

Eliminating software adjustments in circuits based on digital logic improves robustness and reduces cost for small-production-run series. This circuit is a cost-improved version of classical QPSK ...
TechRepublic

Analysis on QPSK Modulation Technique for Wideband Code Division Multiple Access

This paper is the study of the QPSK (Quadrature Phase Shift keying) modulation technique using AWGN (Additive White Gaussian Noise) and Multipath Rayleigh fading channel. In QPSK scheme the authors ...
EDN

QPSK Modulator

For the QPSK modulator shown in the figure above, construct the truth table, phasor diagram, and constellation diagram. In Figure 2, it can be seen that with QPSK, each of the four possible output ...