1. Single-carrier digital modulations (PSK, QAM )

1.1 General principles

In order to transport information from one point to another, a high-frequency sinusoidal carrier wave (also known as "radio frequency" (RF) (figure 2 ) is used. This wave is characterized by its amplitude A, its pulsation ω ₀ (with ω ₀ = 2 πf ₀ ) and its instantaneous phase :

ω ₀ t + j ₀

with j ₀ phase at origin.

It is written :