ABSTRACT
This chapter discusses the algorithms along with their application on the short-range indoor localization. It introduces positioning systems based on different techniques. Triangulation generally refers to positioning techniques using the geometric properties of triangles for location estimation. In this method, coordinates of the target are estimated according to the geometric properties of triangles. Circular lateration is used to calculate the receiver’s current location after navigation messages are successfully received from several satellites. In visible light communication, this can be easily realized because light emitting diode bulbs are in close proximity. The receiver does not have to be synchronized with transmitters since it is not taking measurements of the absolute time of arrival. The rapid development of sensor techniques has been enabling the utilization of geo-magnetism in indoor localization. As these magnetic fields are spatially varied but temporally stable, geo-magnetism is appropriate to be used in indoor localization.
