CPC H04B 7/18515 (2013.01) [H04L 27/362 (2013.01)] | 19 Claims |
1. A satellite communications system comprising a satellite with a spatial digital modulator for modulating an incoming bit stream to transmit in multiple beams,
wherein the spatial digital modulator is configured to generate transmit symbols by dividing the incoming bit stream into symbols of a symbol alphabet and to allocate each transmit symbol to a specific beam, and
wherein the spatial digital modulator is configured to allocate each transmit symbol to a specific beam based on fixed or dynamic mapping rules, and
wherein a receiving station is provided, and the spatial digital modulator is configured to select the beams required for transmission of the symbol alphabet such that they have the highest off-axis gain at the location of the receiving station.
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