modified differential phase shift keying (Modulation) (MDPSK)

Differential phase shift keying( DPSK) is a modulation method characterized by the fact that only differences in signal changesare encoded and transmitted, which significantly reduces the bandwidth required.

Modified Differential Phase Shift Keying (MDPSK) is the further developed method from differential phase shift keying and a bipolar method, which only requires half as much bandwidth as Differential PhaseShift Keying (DPSK).