Geomagnetic Fingerprint Maps for Indoor Positioning

Indoor positioning technology is becoming the hot spot of the current research. How to choose a suitable positioning scheme is particularly important. This paper focuses on the geomagnetic field, and geomagnetic fingerprint maps for indoor location. The methods of constructing geomagnetic fingerprint map are verified via experiments. Experimental results show that the accuracy of the scheme which uses the magnetic field strength values of special landmarks is not enough to constructing efficient geomagnetic fingerprint maps. The method of combining the magnetic field strength value with the path can not only solves the numerical difference caused by the microelectronic mechanical systems sensor effectively, but also has high positioning accuracy. At the same time, it is feasible to use the idea of group intelligence to construct a geomagnetic fingerprint map. We make the corresponding summary to the second scheme, which needs to be further optimized on the original basis so that it can be truly applied to real lives. This paper analyzes the information of the geomagnetic field, compares the schemes of constructing the geomagnetic fingerprint map via experiments, and promote the further development of geomagnetic field in indoor positioning technology.