System and method for monitoring cardiorespiratory parameters

An apparatus for determining physiological parameters of an activity of a living subject, the apparatus comprising:

• at least one sensor configured to receive a reflected radio frequency signal off the living subject;
• a device configured to calculate a location associated with the living subject and track a measure of a distance travelled by the living subject;
• one or more processors configured to determine a measurement of respiration or cardiac activity of the living subject, in part, by:
• measuring an energy content of a raw sensor signal derived from a transmitted radio-frequency signal and the reflected radio frequency signal;
• identifying a period of bodily motion by comparing the measured energy content to a predetermined energy value;
• calculating a spectrum of an epoch of the raw sensor signal, wherein the epoch comprises the identified period of bodily motion, and wherein a segment of the raw sensor signal that corresponds to the identified period of bodily motion is excluded from the calculation of the spectrum;
• and
• finding a spectral peak within the spectrum that corresponds to an expected breathing frequency or an expected cardiac frequency;
• and
• a display to provide information associated with the determined measurement of respiration or cardiac activity to a user over the measure of distance travelled by the living subject.

A system for providing information to a user regarding respiratory and cardiac parameters of a living subject, the system comprising:

• one or more sensors configured to receive one or more reflected radio frequency signals off the living subject;
• one or more processors configured to determine one or more measurements of respiration or cardiac activity of the living subject, in part, by:
• measuring an energy content of a raw sensor signal derived from one or more transmitted radio-frequency signals and the one or more reflected radio frequency signals;
• identifying a period of bodily motion by comparing the measured energy content to a predetermined energy value;
• estimating a spectrum of an epoch raw sensor signal, wherein the epoch comprises the identified period of bodily motion, and wherein a segment of the raw sensor signal that corresponds to the identified period of bodily motion is excluded from the estimation of the spectrum;
• and
• identifying a peak in the estimated spectrum that corresponds to an expected breathing frequency or an expected cardiac frequency;
• and
• feedback means for providing selected information about the determined one or more measurements of respiration or cardiac activity.

A method for providing information to a user regarding respiratory or cardiac parameters of a living subject, the method comprising:

• receiving, with at least one sensor, one or more radio frequency signals reflected from the living subject;
• measuring, with at least one processor, an energy content of a raw sensor signal derived from one or more transmitted radio-frequency signal and the one or more reflected radio-frequency signals;
• identifying, with the at least on processor, a period of bodily motion by comparing the measured energy content to a predetermined energy value;
• estimating, with the at least one processor, a spectrum of an epoch of the raw sensor signal, wherein the epoch comprises the identified period of bodily motion, and wherein a segment of the raw sensor signal that corresponds to the identified period of bodily motion is excluded from the estimation of the spectrum;
• determining, with at least one processor, one or more measurements of respiration or cardiac activity of the living subject by identifying a peak in the estimated spectrum that corresponds to an expected breathing frequency or an expected cardiac frequency;
• and
• providing, with a feedback means, selected information about the determined one or more measurements of respiration or cardiac activity.