Abstract: A mobile device includes: a magnetometer configured to sense a magnetic field and to provide indications of the magnetic field; and a processor communicatively coupled to the magnetometer and configured to: determine an occurrence of a trigger condition associated with imminent motion of the mobile device, present motion of the mobile device, or decalibration of the magnetometer; respond to determining the occurrence of the trigger condition by causing the magnetometer to sense the magnetic field and to provide the indications of the magnetic field; and determine at least one bias of the magnetometer using the indications of the magnetic field.

Abstract: A mobile device is capable of accurately maintaining a global time based on Satellite Position System (SPS) time decoded from an SPS signal using a clock signal acquired from a wireless communication transmitter, such as a base station or access point. The time uncertainty is reduced or minimized by determining a relative change in position of the mobile device with respect to a base position, e.g., a reference position determined from a previous SPS session. The time uncertainty may be determined based on the relative change in position with respect to the base position by transforming it into time units based on the speed of light. The global time may be updated based on the determined time uncertainty, which may be used in a subsequent SPS session to reduce the search window to acquire SPS satellite signals.

Abstract: Methods, apparatuses, and devices for generating one or more harsh or diminished radiofrequency environments relative to a planned route of a mobile device user. In one example, a mobile device user a be routed through a harsh or diminished radiofrequency environment based, at least in part, on a sensor suite of a mobile device and/or based on a user's preferences. Prior to entry into such an environment, various sensors may be activated in a manner that permits position estimation in an absence of SPS based positioning signals and/or TPS based positioning signals.

Abstract: Methods, apparatuses, and devices for generating one or more harsh or diminished radiofrequency environments relative to a planned route of a mobile device user. In one example, a mobile device user a be routed through a harsh or diminished radiofrequency environment based, at least in part, on a sensor suite of a mobile device and/or based on a user's preferences. Prior to entry into such an environment, various sensors may be activated in a manner that permits position estimation in an absence of SPS based positioning signals and/or TPS based positioning signals.

Abstract: Example methods, apparatuses, or articles of manufacture are disclosed herein that may be utilized, in whole or in part, to facilitate or support one or more operations or techniques for pre-processing inertial sensor measurements for navigation for use in or with a mobile communication device.