Patent ID: 7991075

Claim:
Radio broadcasting method for a first multicarrier digital signal occupying a first frequency band adjacent to and not overlapping at least one second frequency band, each of the at least one second frequency band being allocated for a second signal, wherein the first and second signals at least partly carry a same source signal, the method comprising: applying a pre-filtering to said first signal before it is emitted, so as to attenuate the power of said first signal in at least a first portion of said first frequency band adjacent to said at least one second frequency band, and to increase the power of said first signal in a second portion of said first frequency band, far from said at least one second frequency band; and transmitting simultaneously the first and second signals with at least one radio broadcasting emitter, wherein the first signal occupies a single continuous band of frequencies within the first frequency band and does not occupy the at least one second frequency band at transmission.