1. A transmission system adapted to generate at least one multi-carrier signal, the transmission system including a carrier generator adapted to generate a plurality of orthogonal carrier frequencies allocated to at least one user, a data source adapted to impress at least one data symbol onto the carriers, and a combiner adapted to combine the carriers to generate a time-domain waveform, the transmission system characterized by; a phase-shift module adapted to provide at least one predetermined set of poly-phase offsets to the carriers for generating at least one Carrier Interferometry (CI) signal, the phase offsets adapted to map each data symbol to a pulse waveform generated from a superposition of the carriers and centered at a predetermined instant in time.