Patent ID: 9176231
Filing Date: 2015-11-03
Classification: G01S

Abstract:
1. A method for reducing GNSS receiver power usage in a portable electronic device, the method comprising: receiving at least one wireless signal at a portable electronic device in a signal environment, the at least one wireless signal comprising at least one satellite signal; measuring at least one signal characteristic of the at least one wireless signal at the portable electronic device in the signal environment; estimating an estimated signal strength of the at least one wireless signal in the signal environment based on the at least one signal characteristic; comparing the estimated signal strength to an expected signal strength of the at least one wireless signal to calculate an estimated signal-strength-change relative to the expected signal strength; tracking a GNSS signal at the portable electronic device, if the estimated signal-strength-change indicates an expected GNSS signal attenuation is lower than a signal attenuation threshold; and reconfiguring tracking of the GNSS signal at the portable electronic device, if the estimated signal-strength-change indicates the expected GNSS signal attenuation is greater than the signal attenuation threshold.