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Study on tracking system with pulsed AC magnetic field for virtual reality system

Electromagnetic tracking devices are often used to track location and orientation of a user's hand and/or head in a Virtual Reality system. However the tracking precision is not always high enough due to the dependence of the system on the local electromagnetic field that can be easily altered by ambient magnetic fields. A tracking system with pulsed AC (Alternative Current) magnetic field is presented based on the analysis of the principle and shortcomings of the DC (Direct Current) electromagnetic tracking system. The structure of the proposed system and the iterative digital correlator used for processing the received data are described. The simulation result shows the feasibility of the proposed system. Actual electromagnetic tracking system can be designed on the basis of the research.