Implementation of Digital QPSK Modulator by Using VHDL/MATLAB. ... systems they are designed to reduce the channel distortion & to use in RF communication hence many type of carrier modulation ...

To accomplish this, carriers are looking beyond conventional on-off keying (OOK) to coherent dual-polarization quadrature phase-shift keying (DP-QPSK), quadrature amplitude modulation (QAM), and ...

Later on they have implemented a QPSK modulation technique using reversible logic and the QPSK modulator unit will be modelled using HDL code and simulation will be done by ModelSim 6.0 ...