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Methods and apparatus for interference cancellation

  • US 8,854,944 B2
  • Filed: 11/08/2009
  • Issued: 10/07/2014
  • Est. Priority Date: 01/17/2009
  • Status: Active Grant
First Claim
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1. A method for interference cancellation in a wireless device, the method comprising:

  • determining at least one cancellation signal based on signaling received in the wireless device; and

    canceling interference that is caused to a desired signal by at least one received interfering signal from one of a first quasi orthogonal function (QOF) set and a non-intended base station outside an active set of the wireless device based on the determined at least one cancellation signal, wherein said canceling cancels one of;

    interference that is caused to a desired signal from a base station within said active set by an interfering signal from the non-intended base station; and

    interference that is caused to a desired signal from a second QOF set by an interfering signal from the first QOF set, and wherein the second QOF set is non-orthogonal to the first QOF set;

    wherein the at least one cancellation signal is determined using at least one quasi-linear interference cancellation (QLIC) operation;

    wherein said determining includes determining at least one further cancellation signal, based on said signaling, and also using said at least one QLIC operation; and

    wherein said canceling includes canceling interference that is caused to a desired signal from the second QOF set by an interfering signal from the second QOF set based on said at least one further cancellation signal.

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