Active pen panel receiver interference cancellation
First Claim
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1. A processing system for reducing interference, comprising:
- a sensor module configured to;
receive a noisy active pen signal associated with an active pen from a panel receiver; and
receive a plurality of interference signals from a plurality of interference receivers; and
a determination module configured to;
determine a location of the active pen;
calculate a plurality of distances between the location and the plurality of interference receivers;
select, based on the plurality of distances, a subset of the plurality of interference signals from a subset of the plurality of interference receivers,wherein the subset of the plurality of interference receivers are separated from the location by a subset of the plurality of distances;
determine an estimated interference signal based on the subset of the plurality of interference signals; and
generate a filtered active pen signal by reducing interference in the noisy active pen signal based on the estimated interference signal.
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Abstract
A processing system for reducing interference. The processing system includes: a sensor module configured to: receive a noisy active pen signal associated with an active pen from a panel receiver; and receive a plurality of interference signals from a plurality of interference receivers; and a determination module configured to: determine an estimated interference signal based on a subset of the plurality of interference signals; and generate a filtered active pen signal by reducing interference in the noisy active pen signal based on the estimated interference signal.
22 Citations
20 Claims
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1. A processing system for reducing interference, comprising:
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a sensor module configured to; receive a noisy active pen signal associated with an active pen from a panel receiver; and receive a plurality of interference signals from a plurality of interference receivers; and a determination module configured to; determine a location of the active pen; calculate a plurality of distances between the location and the plurality of interference receivers; select, based on the plurality of distances, a subset of the plurality of interference signals from a subset of the plurality of interference receivers, wherein the subset of the plurality of interference receivers are separated from the location by a subset of the plurality of distances; determine an estimated interference signal based on the subset of the plurality of interference signals; and generate a filtered active pen signal by reducing interference in the noisy active pen signal based on the estimated interference signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for reducing interference, comprising:
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receiving a noisy active pen signal associated with an active pen from a panel receiver; receiving a plurality of interference signals from a plurality of interference receivers; determining a location of the active pen; calculating a plurality of distances between the location and the plurality of interference receivers; selecting, based on the plurality of distances, a subset of the plurality of interference signals from a subset of the plurality of interference receivers, wherein the subset of the plurality of interference receivers are separated from the location by a subset of the plurality of distances; determining an estimated interference signal based on the subset of the plurality of interference signals; and generating a filtered active pen signal by reducing interference in the noisy active pen signal based on the estimated interference signal. - View Dependent Claims (12, 13, 14, 15)
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16. An input device, comprising:
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a panel receiver; a plurality of interference receivers; and a processing system configured to; receive a noisy active pen signal associated with an active pen from the panel receiver; receive a plurality of interference signals from the plurality of interference receivers; determine a location of the active pen; calculate a plurality of distances between the location and the plurality of interference receivers; select, based on the plurality of distances, a subset of the plurality of interference signals from a subset of the plurality of interference receivers, wherein the subset of the plurality of interference receivers are separated from the location by a subset of the plurality of distances; determine an estimated interference signal based on the subset of the plurality of interference signals; and generate a filtered active pen signal by reducing interference in the noisy active pen signal based on the estimated interference signal. - View Dependent Claims (17, 18, 19, 20)
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Specification