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Distribution control unit providing simultaneous hybrid FDMA and SS-TDMA operation in a transitional satellite switched system

  • US 4,181,886 A
  • Filed: 08/22/1977
  • Issued: 01/01/1980
  • Est. Priority Date: 08/22/1977
  • Status: Expired due to Term
First Claim
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1. In a communications satellite system of the space division type including spot beam antennas receiving uplink communications signals from a plurality of earth stations and transmitting said uplink signals over downlinks to said earth stations, said uplinks being communicated to said downlinks through a switching matrix forming an array of inputs and outputs interconnected in a row and column fashion through electrically controllable crosspoint switching elements, each uplink being designated to a different matrix input and each downlink to a different matrix output, and a distribution control unit for controlling the conductive states of said crosspoint switching elements, the improvement comprising:

  • (a) means associated with said distribution control unit for generating digital control words, each bit position of said words functioning to control the conductive state of a different crosspoint switching element, and(b) means responsive to said digital control words for selectively and simultaneously rendering any number of said crosspoint switching elements conductive to thereby effect point-to-multipoint interconnection between the matrix inputs and outputs.

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