Methods and apparatus for interference cancellation
First Claim
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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Accused Products
Abstract
Disclosed are methods and apparatus for interference cancellation in a wireless communication system. In particular, the disclosed methods and apparatus provide for interference cancellation in a wireless device, including extending linear interference cancellation techniques, such as quasi-linear interference cancellation (QLIC), in the wireless device to a first orthogonal set, which may be a first quasi orthogonal function (QOF) set for a cdma2000 system to cancel interference from that set upon another desired QOF set. QLIC may also be extended to cancellation of signals from non-intended base stations as well. Accordingly, the present methods and apparatus afford reduced interference through QLIC by canceling signals due to either undesired QOF sets or non-intended base stations, which in turn results in an increase in forward link capacity.
24 Citations
28 Claims
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1. A method for interference cancellation in a wireless device, the method comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for interference cancellation in a wireless device, the apparatus comprising:
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at least one processor configured for; 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; anda memory coupled to the at least one processor; 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. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An apparatus for interference cancellation in a wireless device, the apparatus comprising:
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means for determining at least one cancellation signal based on one or more signals received in the wireless device; and means for canceling interference that is caused to a desired signal by at least one received interfering signal from at least one of a first quasi orthogonal function (QOF) set and a non-intended base station outside and 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. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A computer program product, comprising:
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a non-transitory computer-readable medium comprising; code for causing a computer to determine at least one cancellation signal based on signaling received in a wireless device; and code for causing a computer to cancel 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 code for causing a computer to cancel includes code for causing the computer to cancel 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 code for causing a computer to determine includes code for causing the computer to determine at least one further cancellation signal, based on said signaling, and also using said at least one QLIC operation; and wherein said code for causing a computer to cancel includes code for causing the computer to cancel 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. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification