Broadcom Corporation

Steve Malkos

Manuel Del Castillo

A multi-magnetometer device comprises at least two z-axis aligned and physically rotated magnetometer triads utilized for measuring corresponding earth's magnetic field. The magnetic field measurements are utilized to measure rotation measurements of a single orthogonal axis along the 360 degrees of the complete circle without user's assistance and/or magnetometer movement for magnetometer calibration. The multi-magnetometer device may compute its magnetic heading utilizing the magnetic field measurements if no magnetic perturbations are detected. When magnetic perturbations are detected, a perturbation mitigation process may be performed. The rotation measurements may be generated by selectively combining the magnetic field measurements. Hard-iron components are determined utilizing the rotation measurements, and are removed from the magnetic field measurements. Soft-iron components are determined utilizing the hard-iron free magnetic field measurements, and are removed from the hard-iron free magnetic field measurements. The resulting perturbation free magnetic field measurements are utilized to compute magnetic heading.

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San Jose, CA, United States of America

Steve Malkos