Motion detection for sensors sensitive to motion induced noise
First Claim
1. In an implantable system, a method for estimating a level of noise in a signal produced by an implantable sensor that is sensitive to motion induced noise, the method comprising:
- (a) obtaining sample data representative of a window of the signal produced by the implantable sensor that is sensitive to motion induced noise, the sample data including a plurality of samples each having a magnitude;
(b) assigning each of at least some of the samples to one of a plurality of bins based on the magnitude of the sample, wherein each bin corresponds to a different range of magnitudes; and
(c) estimating a level of motion induced noise in the sensor signal based on a distribution of the samples to the bins, wherein the level of motion induced noise comprises a level of motion artifacts.
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Abstract
Provided herein are implantable systems, and methods for use therewith, for estimating a level of noise in a signal produced by an implantable sensor that is sensitive to motion induced noise. Sample data is obtained that is representative of a window of a signal produced by the implantable sensor that is sensitive to motion induced noise. Such sample data includes a plurality of samples each having a magnitude (e.g., amplitude). Each of at least some of the samples is assigned to one of a plurality of bins based on the magnitude of the sample, wherein each bin corresponds to a different range of magnitudes. The plurality of bins includes at least a low bin defining a lowest magnitude range and a high bin defining a highest magnitude range. A level of motion induced noise in the sensor signal is estimated based on a distribution of the samples to the bins.
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Citations
22 Claims
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1. In an implantable system, a method for estimating a level of noise in a signal produced by an implantable sensor that is sensitive to motion induced noise, the method comprising:
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(a) obtaining sample data representative of a window of the signal produced by the implantable sensor that is sensitive to motion induced noise, the sample data including a plurality of samples each having a magnitude; (b) assigning each of at least some of the samples to one of a plurality of bins based on the magnitude of the sample, wherein each bin corresponds to a different range of magnitudes; and (c) estimating a level of motion induced noise in the sensor signal based on a distribution of the samples to the bins, wherein the level of motion induced noise comprises a level of motion artifacts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. In an implantable system, a method for estimating a level of noise in a signal produced by an implantable sensor that is sensitive to motion induced noise, the method comprising:
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(a) obtaining sample data representative of a window of the signal produced by the implantable sensor that is sensitive to motion induced noise, the sample data including a plurality of samples each having a magnitude; (b) assigning each of at least some of the samples to one of a plurality of bins based on the magnitude of the sample, wherein each bin corresponds to a different range of magnitudes; and (c) estimating a level of motion induced noise in the sensor signal based on a distribution of the samples to the bins, wherein the implantable sensor is an implanted photoplethysmography (PPG) sensor, and wherein the signal that is sensitive to motion induced noise is a PPG signal.
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13. In an implantable system, a method for estimating a level of noise in a signal produced by an implantable sensor that is sensitive to motion induced noise, the method comprising:
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(a) obtaining sample data representative of the signal produced by the implantable sensor that is sensitive to motion induced noise; (b) producing a histogram for a window of the sensor signal, based on the sample data; and (c) estimating the level of motion induced noise in the sensor signal based on a distribution of the histogram, wherein the level of motion induced noise comprises a level of motion artifacts. - View Dependent Claims (14, 15, 16)
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17. An implantable system including an implantable sensor that is sensitive to motion induced noise, comprising:
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means for obtaining sample data representative of a window of the signal produced by the implantable sensor that is sensitive to motion induced noise, the sample data including a plurality of samples each having a magnitude; means for assigning each of at least some of the samples to one of a plurality of bins based on the magnitude of the sample, wherein each bin corresponds to a different range of magnitudes; and means for estimating a level of motion induced noise in the sensor signal based on a distribution of the samples to the bins, wherein the level of motion induced noise comprises a level of motion artifacts. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification