SPLASH Nonlinear and Unsteady Free-Surface Analysis Code for Grand Prix Yacht Design

A multi-phase shift modulator-demodulator system employs a pair of pulse trains as the information source for phase modulating a carrier wave. The phase differences between selected bit positions of the pulse trains are employed to modulate the carrier wave through the use of typical ring modulators. In the demodulator phase comparison and delay circuitry is employed to extract the clock frequency for removing the information pulse trains.