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Efficient single-hop directional multichannel system

  • US 5,146,514 A
  • Filed: 09/30/1991
  • Issued: 09/08/1992
  • Est. Priority Date: 09/30/1991
  • Status: Expired
First Claim
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1. A shared directional multichannel system for scheduled uniform traffic of up to k concurrent transmissions from m source stations to n destination stations, each said destination station including one receiver input, each said source station including p transmitter outputs and all said source stations being partitioned into at least one source station group such that no more than one said source station group contains less than k source stations, wherein k, m, n and p are positive nonzero integers and m≧

  • k=( logp n choose (p-1)), the system comprising;

    a first stage including at least (p*k) first directional couplers, each said first directional coupler having n/p outputs and no more m/k inputs, all said inputs of each said first directional coupler being connected to transmitter outputs from a respective source station group;

    a second stage including n second directional couplers, each said second directional coupler having at least k inputs and one output, said output being connected to a destination station receiver input; and

    interconnection means for coupling said first stage to said second stage by connecting said first directional coupler outputs to said second directional coupler inputs in a manner such that the lth transmitter output of the ith source station within each said source station group is connected to the receiver input of the jth destination station, where the modulo p sum of the digits of (j modulo p) in positions corresponding to unit digit positions in (i radix

         2) is equal to (1-1).

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