GR-PMS: A Geomagnetism-Based Real-Time Positioning Mechanism of Smart Phones

The use of geomagnetic information as indoor positioning technology based on location fingerprints has shown its unique technical superiority. However, the differences in the built-in geomagnetic sensors in different mobile phones make it difficult to achieve the desired positioning accuracy. In light of this problem, the author of this paper proposes a real-time positioning mechanism of smart phones based on geomagnetism. In an indoor environment with certain stability, a standard sensor of geomagnetism acquisition is used to collect data so that different models of mobile phones can achieve geomagnetic positioning through similarity matching algorithms. The method proposed solves the problem of differences of the builtin sensors of different mobile phones, reduces the time of geomagnetic positioning, improves its accuracy, and reduces the cost.