Indoor Geolocation for Military Applications

Indoor geolocation is subject to much more stringent constraints for military applications than for commercial applications. The principal constraints that must be assumed are the absence of a map of the interior of the building, reference points inside the building, and any a priori information or data. The global positioning system (GPS), although potentially invaluable, must be assumed to be unavailable to maintain operational flexibility. This paper explores the possibility of using dead-reckoning and filtering alone to track a mobile´s path inside a building. Kalman, particle, and grid filters are designed and tested with actual data to assess which filter type is the most suitable and the potential accuracy of the indoor geolocation method.