Patent ID: 6996077

Claim:
A satellite broadcasting system for transmitting a plurality of broadcasting signals of a plurality of channels from a ground broadcasting station (BC 1 or BC 2 ), repeating the broadcasting signals with a geostationary satellite (SAT), and broadcasting the broadcasting signals to a broadcasting receiver (MS) in a predetermined service area on the ground, said ground broadcasting station (BC 1 or BC 2 ) comprising multiplex means ( 111 - 11 n, 121 - 12 n, 131 ) for spreading spectra of the broadcasting signals using different spreading codes in units of channels and synthesizing the broadcasting channels to code-division-multiplex the broadcasting signals of the plurality of channels, and transmitting the broadcasting signals; and transmission synchronization means ( 140 ) for setting a phase relationship of the spreading codes between the broadcasting signals of the channels code-division-multiplexed by said multiplex means in a predetermined synchronization state.