Patent ID: 9459118
Filing Date: 2016-10-04
CPC Classification: G01C

Claim Text:
1. A method comprising: obtaining, by a mobile device, a first step count for a user of the mobile device based on a motion sensor signal provided by a motion sensor of the mobile device; generating a frequency domain motion signal based on the motion sensor signal; analyzing peaks of the frequency domain motion signal within a pedestrian frequency band to identify a dominant frequency of the motion sensor signal, the analyzing including determining that the dominant frequency corresponds to a lowest frequency peak within the pedestrian frequency band and has a peak that exceeds a threshold value, and determining that another peak within the pedestrian frequency band corresponds to a harmonic frequency that is a multiple of the dominant frequency; detecting that the user is wearing the mobile device on the user's arm based on the analysis; and in response to the detecting, multiplying the first step count by a factor to calculate an adjusted step count, where the method is performed by one or more hardware processors.