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Partly orthogonal multiple code trees

  • US 6,982,946 B2
  • Filed: 04/05/2001
  • Issued: 01/03/2006
  • Est. Priority Date: 04/05/2001
  • Status: Active Grant
First Claim
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1. An interference reduction method comprising the steps of:

  • a first generating step for generating a first scrambling code sequence;

    a second generating step for generating a second scrambling code sequence based on a modification of the first scrambling code sequence;

    a first forming step for forming a first code tree associated with the first scrambling code sequence;

    a second forming step for forming a second code tree associated with the second scrambling code sequence;

    a first spreading step for spreading a first signal using a first portion of the first code tree; and

    a second spreading step for spreading a second signal using a second portion of the second code tree, the second portion of the second code tree being orthogonal to the first portion of the first code tree.

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