Abstract: A gyroscope signal may be compensated for offset by performing a low frequency adaptive noise cancellation process. Noise corresponding to user dynamics may be reduced by performing a motion sensor based adaptive noise cancellation process. Further, noise corresponding to vibratory motion of the portable device may be reduced by applying a discrete wavelet transform function.

Abstract: Systems (100), methods (400), devices (110, 120, 1006, 952), and computer programming products for improved navigation inside buildings and in other locations, using both passive and active NFC-capable devices, in conjunction with inertial and/or magnetic devices (8242, 8134, 8135).

Abstract: Systems (100), methods (400), devices (110, 120, 1006, 952), and computer programming products for improved navigation inside buildings and in other locations, using both passive and active NFC-capable devices, in conjunction with inertial and/or magnetic devices (8242, 8134, 8135).

Abstract: An accelerometer with improved calibration features, an electronic device having an accelerometer with improved calibration features, and a method of calibrating an accelerometer of an electronic device are provided. In accordance with one embodiment, there is method of calibrating an accelerometer of an electronic device, the accelerometer having at least a primary sensing axis and a secondary sensing axis, the second sensing axis being oriented parallel to the primary sensing axis and in the opposite direction of the primary sensing axis, the method comprising: measuring acceleration calibration data using the primary sensing axis and the secondary sensing axis of the accelerometer; determining calibration parameters in accordance with measured calibration data from the accelerometer; and storing the calibration parameters in a memory of the electronic device.

Abstract: An accelerometer with improved calibration features, an electronic device having an accelerometer with improved calibration features, and a method of calibrating an accelerometer of an electronic device are provided. In accordance with one embodiment, there is method of calibrating an accelerometer of an electronic device, the accelerometer having at least a primary sensing axis and a secondary sensing axis, the second sensing axis being oriented parallel to the primary sensing axis and in the opposite direction of the primary sensing axis, the method comprising: measuring acceleration calibration data using the primary sensing axis and the secondary sensing axis of the accelerometer; determining calibration parameters in accordance with measured calibration data from the accelerometer; and storing the calibration parameters in a memory of the electronic device.