phase shift keying
Modulation scheme encoding all information into phase.
si(t)=ℜ{Ag(t)ej2π(i−1)/Mej2πfct}
signal constellation points are given by
si1=Acos(2π(i−1)M)
si2=Asin(2π(i−1)M)
All signals have equal energy, A2.
Based on the number of points in the diagram, M (because we need to map M messages onto coefficients in signal space), there are a few popular variants of PSK. Namely
