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Hybrid spread-spectrum technique for expanding channel capacity

  • US 7,092,440 B1
  • Filed: 09/27/2000
  • Issued: 08/15/2006
  • Est. Priority Date: 09/27/2000
  • Status: Expired due to Fees
First Claim
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1. A method, comprising overlapping a plurality of direct-sequence spread-spectrum signals using carrier frequencies that are i) each precisely an integer multiple of a bit rate and ii) orthogonally spaced relative to an integral multiple of the bit rate rather than a chip rate,wherein the chip rate is an integer multiple of the bit rate and is greater than or equal to two andwherein the product of two of the plurality of direct-sequence spread-spectrum signals, independent of their relative starting phases, will integrate to zero and an integration time to define orthogonality is 1/Tb, where 1/Tb the bit rate.

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