System and method for efficient frequency use in a hybrid multi-spot satellite broadcasting system
First Claim
1. A hybrid multispot satellite broadcasting system comprising at least one satellite capable of multibeam broadcasting of beams in respective frequency bandwidths, each one of said beams adapted to be broadcast towards a terrestrial repeater which is capable of receiving, processing and re-transmitting said beam in a frequency bandwidth BT which is different from that of the bandwidth BS of the beam received, characterized in that a bandwidth of a signal re-transmitted from a first terrestrial repeater contains a frequency range substantially equal to a bandwidth used for a beam broadcast from said satellite to at least a second terrestrial repeater corresponding to a different area of coverage from said first terrestrial repeater, wherein BT=k×
- BS and 1≦
k≦
2 for time division multiplexing (TDM) mode transmission, and wherein k corresponds to a difference between a satellite channel coding rate and a terrestrial channel coding rate, and wherein k=1 for CDM mode transmission.
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Abstract
System and method for use in a hybrid multispot satellite broadcasting system comprising at least one satellite (S; S1; S2) for multibeam broadcasting of beams in respective frequency bandwidths (F1; F2; F3), the system further comprising a plurality of terrestrial repeater (R1; R2; R3) for receiving, processing and re-transmitting said beams in a frequency bandwidth which is different from that of the bandwidth of the beam received. Each terrestrial repeater (R1; R2; R3) re-uses for terrestrial re-transmission a combination of bandwidths corresponding to different beams broadcast from said satellite to different beams.
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Citations
14 Claims
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1. A hybrid multispot satellite broadcasting system comprising at least one satellite capable of multibeam broadcasting of beams in respective frequency bandwidths, each one of said beams adapted to be broadcast towards a terrestrial repeater which is capable of receiving, processing and re-transmitting said beam in a frequency bandwidth BT which is different from that of the bandwidth BS of the beam received, characterized in that a bandwidth of a signal re-transmitted from a first terrestrial repeater contains a frequency range substantially equal to a bandwidth used for a beam broadcast from said satellite to at least a second terrestrial repeater corresponding to a different area of coverage from said first terrestrial repeater, wherein BT=k×
- BS and 1≦
k≦
2 for time division multiplexing (TDM) mode transmission, and wherein k corresponds to a difference between a satellite channel coding rate and a terrestrial channel coding rate, and wherein k=1 for CDM mode transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- BS and 1≦
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8. A method for a hybrid multispot broadcasting through a satellite system, said system comprising at least one satellite for multibeam broadcasting of beams in respective frequency bandwidths, each one of said beams being broadcast towards a terrestrial repeater which is capable of receiving, processing and re-transmitting said beam in a frequency bandwidth BT which is different from that of the bandwidth BS of the beam received, characterized in that said first terrestrial repeater re-transmits said signal in a bandwidth containing a frequency range substantially equal to a bandwidth used for a beam broadcast from said satellite to at least a second terrestrial repeater corresponding to a different area of coverage from said first terrestrial repeater, wherein BT=k×
- BS and 1≦
k≦
2 for time division multiplexing (TDM) mode transmission, and wherein k corresponds to a difference between a satellite channel coding rate and a terrestrial channel coding rate, and wherein k=1 for CDM mode transmission. - View Dependent Claims (9, 10, 11, 12, 13, 14)
- BS and 1≦
Specification