Communication Broadcast / Multicast synchronized

A method for receiving broadcasts, comprising: receiving, by a receiver, a first transmission (100) comprising a plurality of time slots; identify the first transmission includes a portion (178) broadcast modulated using a first modulation format and a portion (175) modulated using a unicast second modulation format, wherein the first and second modulation formats are different; demodulating (545) the unicast portion; and demodulating (540) the broadcast portion; characterized in that: the portion (178) and the diffusion portion (175) are separate unicast the first transmission time, occupying each, one or more separate time slots the first transmission portions; and the portion (178) is a synchronized broadcast broadcast portion transmitted by a plurality of synchronized transmitters using a same waveform diffusion.