Patent ID: 11860303
Assignee: RESMED SENSOR TECHNOLOGIES LIMITED
Field: Medical technology (Instruments)
Classification: CPC G  A | IPC A  G

Claim 15:
16. The apparatus of claim 1, wherein the calculated plurality of features comprises one or more of:
(a) a frequency characteristic derived from stopped frequency through a gesture in motion up to some maximum frequency, then back to stopped again;
(b) a time and frequency analysis comprising any of short time Fourier transform, peak and harmonic tracking and/or channel processing of a plurality of signals of the motion output signals;
(b) a phase characteristic comprising a difference in phase between in-phase (I) and quadrature phase (Q) signals and an evaluation of a repetitive signal within a certain number of standard deviations of a mean of characteristic change;
(c) an amplitude characteristic comprising any of: peak and trough detection, zero crossing detection, and envelope of signal detection; and
(d) a learn skewness, kurtosis, spread in frequency, phase, amplitude, mean, and/or standard deviation.