Systems and Methods for Highly Accurate and Efficient Pulse Prediction

• US 20140198883A1
• Filed: 12/20/2013
• Published: 07/17/2014
• Est. Priority Date: 12/20/2012
• Status: Abandoned Application

• Current Assignee: Rhode Island Board of education (STATE OF RHODE ISLAND)
• Original Assignee: State of Rhode Island and Providence Plantations
• Inventors: Kay, Steven, O'Shea, Andrew
• Application Number:
  US14/136,459
• Publication Number:
  US 20140198883A1
• Time in Patent Office: Days
• US Class Current: 375/342
• CPC Class Codes: A61B 5/024 Detecting, measuring or recording pulse rate or heart rate A61B5/0205, A61B5/021 take precedence
• CPC Class Codes: A61B 5/7246 using correlation, e.g. template matching or determination of similarity
• CPC Class Codes: G06F 18/00 Pattern recognition
• CPC Class Codes: G06F 2218/00 Aspects of pattern recognition specially adapted for signal processing
• CPC Class Codes: G06F 2218/08 Feature extraction
• CPC Class Codes: H04L 7/033 using the transitions of the received signal to control the phase of the synchronising-signal-generating means, e.g. using a phase-locked loop

Abstract

A method is disclosed for predicting a pulse periodicity in a signal. The method includes the steps of receiving a signal that includes a component that is periodic having an unknown periodicity and a noise component; comparing the signal to an adjustable reference signal, and varying at least one of the phase and the periodicity of the reference signal until a best fit match is obtained between the signal and the reference signal.

Claims

1. A method of predicting a pulse periodicity in a signal, said method comprising the steps of receiving a signal that includes a component that is periodic having an unknown periodicity and a noise component;

comparing the signal to an adjustable reference signal, and varying at least one of the phase and the periodicity of the reference signal until a best fit match is obtained between the signal and the reference signal.

2. The method as claimed in claim 1, wherein said method further includes the step of identifying instances of peak pulse power in the signal, and wherein said step of comparing the adjustable reference signal to the signal involves comparing the adjustable reference signal to the instances of pulse peak power of the signal.

3. The method as claimed in claim 1, wherein said method further includes the step of providing an output indication of the period of the component of the signal that is periodic.

4. The method as claimed in claim 1, wherein the signal and the adjustable reference signal are not synchronized with each other prior to performing the steps of claim 1.

5. The method as claimed in claim 1, wherein the signal represents a heart rate of a subject.

8. The method as claimed in claim 6, wherein the signal and the adjustable reference signal are not synchronized with each other prior to performing the steps of claim 1.

6. A method of estimating a heart pulse rate in a subject, said method comprising the steps of receiving a signal that is representative of a heart rate and includes a component that is periodic having an unknown periodicity and a noise component;

identifying instances of peak pulse power in the signal;

comparing the instances of pulse peak power of the signal to an adjustable reference signal, and varying at least one of the phase and the periodicity of the reference signal until a best fit match is obtained between the signal and the reference signal.

7. The method as claimed in claim 6, wherein said method further includes the step of providing an output indication of the period of the component of the signal that is periodic.

9. A system for estimating a heart pulse rate in a subject. The system includes an input port for receiving a signal that is representative of a heart rate and includes a component that is periodic having an unknown periodicity and a noise component;

an identification module for identifying instances of peak pulse power in the signal;

a comparison module for comparing the instances of pulse peak power of the signal to an adjustable reference signal, and an adjustment module for varying at least one of the phase and the periodicity of the reference signal until a best fit match is obtained between the signal and the reference signal.

10. The system as claimed in claim 9, wherein said system further includes an output port for providing an output indication of the period of the component of the signal that is periodic.

11. The system as claimed in claim 9, wherein the signal and the adjustable reference signal are not synchronized with each other prior receiving the signal at the input port.