US 6,982,946 B2 | ||
Partly orthogonal multiple code trees | ||
Niclas Wiberg, Linköping (Sweden); Gunnar Bark, Linköping (Sweden); and Ke Wang Helmersson, Linköping (Sweden) | ||
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (Sweden) | ||
Filed on Apr. 05, 2001, as Appl. No. 9/828,340. | ||
Prior Publication US 2002/0172264 A1, Nov. 21, 2002 | ||
Int. Cl. H04J 11/00 (2006.01) |
U.S. Cl. 370—208 | 38 Claims |
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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