Decomposition of composite signals
AssigneeAnalog Devices, Inc.
InventorIlker Bayram
Life of this patent
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Abstract
Disclosed herein are example systems and approaches for decomposition of composite signals. Decomposition of the composite signals may include derivation of two or more signals from the composite signals. An upper envelope and lower envelope may be determined for a composite signal in accordance with a smoothness parameter. A smooth estimate may be produced based on the upper envelope and the lower envelope, where the smooth estimate provides an estimate for a smooth component of the composite signal, which may be more accurate than legacy approaches.
Claims11
One or more non-transitory computer-readable media having instructions stored thereon, wherein the instructions, when executed by processing circuitry of a vital monitor system, perform the steps of:
- sensing multiple characteristics of an individual by a sensor of the vital monitor system;
- generate a composite signal based on the multiple characteristics;
- producing an upper envelope for the composite signal, wherein producing the upper envelope includes setting a minimum value permitted for the upper envelope, the minimum value being equal to the composite signal;
- producing a lower envelope for the composite signal, wherein producing the lower envelope includes setting a maximum value permitted for the lower envelope, the maximum value being equal to the composite signal, and wherein the composite signal is decomposed into multiple signals corresponding to respective different characteristics sensed by the sensor configured to sense vital signs of an individual, with a first characteristic of the respective different characteristic being respiration of an individual;
- producing a smooth estimate for a smooth component of the composite signal, the smooth estimate being located between the upper envelope and the lower envelope, wherein producing the smooth estimate comprises solving a minimization problem with respect to a function based on a distance of the smooth estimate from the composite signal;
- identifying the smooth estimate with the respiration of the individual;
- and
- providing an output based on the smooth estimate for monitoring at least one of the multiple characteristics of the individual,
- wherein to provide the output, the instructions, when executed by the processing circuitry, further cause the processing circuitry to indicate a current physiological parameter of the individual.
Dependencies are inferred from the claim text.