Patent ID: 11928894
Assignee: ORIGIN WIRELESS, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 10:
11. The system of claim 6, wherein:
the N consecutive step segments (N-step) have N phases;
an i-th phase segment (i-SSeg) is the i-th step segment in the N-step, i being a positive integer not greater than N;
the at least one motion feature is associated with at least one of: a time stamp in the time window, the at least one step segment (SSeg) and the at least one motion cycles; and
the at least one motion feature comprises at least one of the following N-step-related features:
a motion speed, a motion acceleration being a derivative of motion speed, a step length being an integration of motion speed over a SSeg around the time stamp, a step period being duration of the SSeg, a step frequency being inversely proportion to the step period, a stepwise mean speed being A-average of motion speed in the SSeg, wherein A-average comprises at least one of: an average, a weighted average and a trimmed mean,
a stepwise max speed being maximum motion speed in the SSeg, a stepwise min speed being minimum motion speed in the SSeg, a stepwise speed variance being variance of motion speed in the SSeg, a stepwise speed deviation being X-percentile of sample distribution of mean-subtracted speed in the SSeg, wherein the mean-subtracted speed is motion speed minus a stepwise mean speed and X is a number between 0 and 100,
a stepwise mean acceleration being A-average of motion acceleration in the SSeg, a stepwise max acceleration being maximum motion acceleration in the SSeg, a stepwise min acceleration being minimum motion acceleration in the SSeg, a stepwise acceleration variance being variance of motion acceleration in the SSeg, a stepwise acceleration deviation being X-percentile of sample distribution of mean-subtracted acceleration in the SSeg, wherein the mean-subtracted acceleration is motion acceleration minus a stepwise mean acceleration,
an N-step length being an integration of motion speed over a N-step around the time stamp, N-step period being duration of the N-step, N-step frequency being inversely proportion to N-step period, N-step mean speed being A-average of motion speed in the N-step, N-step max speed being local maximum of motion speed in the N-step, N-step min speed being local minimum of motion speed in the N-step, N-step speed variance being variance of motion speed in the N-step, N-step speed deviation being X-percentile of sample distribution of mean-subtracted speed in the N-step, wherein the mean-subtracted speed is motion speed minus N-step mean speed and X is a number between 0 and 100,
an N-step mean acceleration being A-average of motion acceleration in the N-step, N-step max acceleration being local maximum of motion acceleration in the N-step, N-step min acceleration being local minimum of motion acceleration in the N-step, N-step acceleration variance being variance of motion acceleration in the N-step, N-step acceleration deviation being X-percentile of sample distribution of mean-subtracted acceleration in the N-step, wherein the mean-subtracted acceleration is motion acceleration minus N-step mean acceleration,
a step feature (SF) being at least one of: a step length, step period, step frequency, stepwise mean speed, stepwise max speed, stepwise min speed, stepwise speed variance, stepwise speed deviation, stepwise speed peak variance, stepwise speed valley variance, k-th stepwise speed-ACF-peak (k-SSAP), mean k-SSAP, k-SSAP variance, k-SSAP difference (k-SSAPD), mean k-SSAPD, k-SSAPD variance, stepwise speed-ACF-peak-count (SSAPC), mean SSAPC, SSAPC variance, SSAPC-pdf, SSAPC-difference (SSAPCD), mean SSAPCD, SSAPCD variance, stepwise speed recurrent plot (SSRP), SSRP feature, stepwise time-scaled speed ACF (STSSA) feature, stepwise speed harmonic ratio, stepwise speed harmonic feature, stepwise generalized speed harmonic feature, stepwise speed symmetry measure, stepwise mean acceleration, stepwise max acceleration, stepwise min acceleration, stepwise acceleration variance, stepwise acceleration deviation, stepwise speed peak variance, stepwise speed valley variance, k-th stepwise acceleration-ACF-peak (k-SAAP), mean k-SAAP, k-SAAP variance, k-SAAP difference (k-SAAPD), mean k-SAAPD, k-SAAPD variance, stepwise acceleration-ACF-peak-count (SAAPC), mean SAAPC, SAAPC variance, SAAPC-pdf, SAAPC-difference (SAAPCD), mean SAAPCD, SAAPCD variance, stepwise acceleration RP (SARP), SARP feature, stepwise time-scaled acceleration ACF (STSAA) feature, stepwise acceleration harmonic ratio, stepwise acceleration harmonic feature, stepwise generalized acceleration harmonic feature, stepwise symmetry measure, N-step length, N-step period, N-step frequency, N-step mean speed, N-step max speed, N-step min speed, N-step speed variance, N-step speed deviation, N-step speed peak variance, N-step speed valley variance, k-th N-step speed-ACF-peak (k-NSAP), mean k-NSAP, k-NSAP variance, k-NSAP difference (k-NSAPD), mean k-NSAPD, k-NSAPD variance, N-step speed-ACF-peak-count (NSAPC), mean NSAPC, NSAPC variance, NSAPC-pdf, NSAPC-difference (NSAPCD), mean NSAPCD, NSAPCD variance, N-step speed recurrent plot (NSRP), NSRP feature, N-step time-scaled speed ACF (NTSSA) feature, N-step speed harmonic ratio, N-step speed harmonic feature, N-step generalized speed harmonic feature, N-step speed symmetry measure, N-step mean acceleration, N-step max acceleration, N-step min acceleration, N-step acceleration variance, N-step acceleration deviation, N-step speed peak variance, N-step speed valley variance, k-th N-step acceleration-ACF-peak (k-NAAP), mean k-NAAP, k-NAAP variance, k-NAAP difference (k-NAAPD), mean k-NAAPD, k-NAAPD variance, N-step acceleration-ACF-peak-count (NAAPC), mean NAAPC, NAAPC variance, NAAPC-pdf, NAAPC-difference (NAAPCD), mean NAAPCD, NAAPCD variance, N-step acceleration RP (NARP), NARP feature, N-step time-scaled acceleration ACF (NTSAA) feature, N-step acceleration harmonic ratio, N-step acceleration harmonic feature, N-step generalized acceleration harmonic feature, N-step symmetry measure, a function of at least one of the above statistics, a function of another statistics, and a function of another SF, wherein an i-SF is a stepwise SF associated with an i-SSeg,
a mean SF being A-average of the SF in a subwindow of the time window around the time stamp, wherein the subwindow is at least one of: the whole time window, a sliding window, at least one motion cycle, at least one SSeg and another subwindow,
a mean i-SF being A-average of the SF of i-SSeg (i-SF) in the subwindow, a max SF being maximum of the SF in the subwindow, a max i-SF being maximum of the i-SF in the subwindow, a min SF being minimum of the SF in the subwindow, a min i-SF being minimum of the i-SF in the subwindow, an SF variance being variance of SF in the subwindow, an i-SF variance being variance of i-SF in the subwindow, an SF deviation being X-percentile of sample distribution of mean-subtracted SF in the subwindow, wherein the mean-subtracted SF is SF minus mean SF, an i-SF deviation being X-percentile of sample distribution of mean-subtracted i-SF in the subwindow, wherein the mean-subtracted i-SF is i-SF minus mean i-SF,
SF statistics being at least one of: mean SF, max SF, min SF, SF variance, SF deviation, and another statistics of SF,
i-SF statistics being at least one of: mean i-SF, max i-SF, min i-SF, i-SF variance, i-SF deviation, and another statistics of i-SF,
a ratio of a SF statistics and another SF statistics, a ratio of an i-SF statistics and another i-SF statistics with same i, a ratio of an i-SF statistics and another i-SF statistics with different i, a ratio of an i-SF statistics and the same i-SF statistics with different i, a ratio of a SF statistics and an i-SF statistics, a difference of a SF statistics and another SF statistics, a difference of an i-SF statistics and another i-SF statistics with same i, a difference of an i-SF statistics and another i-SF statistics with different i, a difference of an i-SF statistics and the same i-SF statistics with different i, a difference of a SF statistics and an i-SF statistics,
a similarity measure of a SF statistics and another SF statistics, a similarity measure of an i-SF statistics and another i-SF statistics with same i, a similarity measure of an i-SF statistics and another i-SF statistics with different i, a similarity measure of an i-SF statistics and the same i-SF statistics with different i, a similarity measure of a SF statistics and an i-SF statistics, a function of at least one of: at least one SF statistics, and at least one i-SF statistics,
a ratio of a function of a i-SF statistics and another function of another i-SF statistics with same i, a ratio of a function of a i-SF statistics and another function of another i-SF statistics with different i, a ratio of a function of a i-SF statistics and another function of the same i-SF statistics with different i,
a composite function of: a function of a i-SF statistics and another function of another i-SF statistics with same i, a composite function of: a function of a i-SF statistics and another function of another i-SF statistics with different i, a composite function of: a function of a i-SF statistics and another function of the same i-SF statistics with different i, and another statistics of at least one of: at least one SF, and at least one i-SF.