Haechitech Corporation

Jo An Na

Young Joon Kim

Dong Yoon Kim

Kyoung Suck Ki

Byung Ki Kim

Yeon Soo Choi

Seung Hwan Park

Hyung Sik Shin

A method of correcting an output value of a geomagnetic sensor that recursively calculates a state estimate, an estimate gain vector, and an estimate error co-variance based on the output value of the geomagnetic sensor that is acquired sequentially and corrects the output value of the geomagnetic sensor based on the value includes acquiring a koutput value of the geomagnetic sensor, calculating a kestimate gain vector based on a k&#x2212;1estimate error co-variance and the koutput value, calculating a kstate estimate based on the calculated kestimate gain vector and the koutput value and a k&#x2212;1state estimate, calculating the kestimate error co-variance using the kestimate gain vector and a k&#x2212;1estimate error co-variance, and correcting the output value of the geomagnetic sensor based on the kstate estimate, wherein k is a natural number larger than 1.

Method and apparatus of correcting output value of geomagnetic sensor

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Seoul, South Korea

Jo An Na