公开(公告)号：US20180156920A1

公开(公告)日：2018-06-07

申请号：US15370240

申请日：2016-12-06

Applicant: GOOGLE INC.

Inventor： Frank Van Diggelen ,  Ke Xiao ,  Gustavo Moura ,  Wyatt Riley

IPC: G01S19/19 ,  H04L25/03 ,  H04L12/24 ,  G01S19/52

Abstract: In a method for accurately estimating gait characteristics of a user, first parameters indicative of user movement, including a GNSS-derived speed and step count, are monitored. Values of the first parameters are processed to determine values of second parameters indicative of movement of the user. The processing includes applying, as inputs to an estimator (e.g., Kalman filter) having the second parameters as estimator states, values of at least one of the first parameters and/or values of at least one parameter derived from one or more of the first parameters. At least two of the second parameters are collectively indicative of a mapping between step frequency and step length of the user. A graphical user interface may display values of at least one of the second parameters, and/or at least one parameter derived from one or more of the second parameters.