Single-Sideband modulation

Single-sideband modulation changes the amplitudes of two carrier waves that have quadrature phase relationship.

Single-sideband modulation is given by

$$x_{ssb}(t) = x(t)\cdot \cos(2\pi f_ct) - \mathcal{H}\{x(t)\}\cdot \sin(2\pi f_ct),$$

where $\mathcal{H}$ is the Hilbert transform.