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Apply Complex Phase Shift to QPSK Signal

This example uses:

Open Model

The model applies QPSK modulation, and then applies a phase shift to a signal. Calculate the phase difference and plot the constellation of the signal before and after the phase shift.

TheComplex Phase Shiftblock applies a 30 degree phase shift to a QPSK modulated signal. TheComplex Phase Differenceblock determines the phase difference. ATo Workspace(Simulink)block to passes the calculated phase difference to the workspace. AConstellation Diagramblock plots the signal constellation before and after the phase shift.

The phase difference is calculated from the second input to the first input.

The calculated phase difference is: -30.0000